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1
Kurniawati, Diniar Mungil. "Investigasi Performa Turbin Angin Crossflow Dengan Simulasi Numerik 2D." JTT (Jurnal Teknologi Terpadu) 8, no. 1 (2020): 7–12. http://dx.doi.org/10.32487/jtt.v8i1.762.
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Wind turbine is a solution to harness of renewable energy because it requires wind as the main energy. Wind turbine work by extracting wind energy into electrical energy. Crossflow wind turbine is one of the wind turbines that are developed because it does not need wind direction to produce maximum efficiency. Crossflow wind turbines work with the concept of multiple interactions, namely in the first interaction the wind hits the first level of turbine blades, then the interaction of the two winds, the remainder of the first interaction enters the second level blades before leaving the wind turbine. In the design of crossflow wind turbine the diameter ratio and slope angle are important factors that influence to determine of performance in crossflow wind turbine. In this study varied the angle of slope 90 ° and variations in diameter ratio of 0.6 and 0.7. The study aimed to analyze the effect of diameter ratio and slope angle in performance of the crossflow wind turbine. This research was conducted with numerical simulation through 2D CFD modeling. The results showed that the best performance of crossflow wind turbine occurred at diameter ratio variation 0.7 in TSR 0.3 with the best CP value 0.34.
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Rantererung, Corvis L., and Atus Buku. "Comparison of Crossflow Turbine Performance through Nozzle Position Variations Using ANSYS Simulation." International Journal on Advanced Science, Engineering and Information Technology 13, no. 6 (2023): 2361–71. http://dx.doi.org/10.18517/ijaseit.13.6.19054.
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The performance comparison of Crossflow turbines is greatly influenced by the position of the nozzle in the conversion of water energy into mechanical energy that occurs through the blades, runners, and shafts of Crossflow turbines. The study aims to directly examine the visualization of water fluid dynamics across the turbine runner blade and enhance the performance of the Crossflow turbine by varying the nozzle position. This study intends to investigate the impact of water flow dynamics and emission on the performance of Crossflow turbines with a combined horizontal-vertical nozzle position, specifically focusing on the magnitude of the number of turbine blades driven and the size of the runner blade area. The objective of investigating nozzle position variations in Crossflow turbines is to determine the specific nozzle position at which the turbine blade may efficiently extract maximum energy from the water flow, hence optimizing turbine performance. The research method using models made using CAD software is AutoCAD by exporting to IGES or IGS format to be compatible with ANSYS. The simulation of this research is with post-processing. There are three, namely making animations, making contours, and taking data to compare cross-turbine performance using variations in nozzle position. Crossflow turbine performance with horizontal nozzle position torque and turbine power is lower, and there is an increase in a vertical position. Then, the horizontal and vertical nozzle position is very good because the nozzle is more effective with maximum turbine performance, namely 13.811-watt turbine power 1,099 turbine torque at 120 rpm.
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Rantererung, Corvis L., and Atus Buku. "Comparison of Crossflow Turbine Performance through Nozzle Position Variations Using ANSYS Simulation." International Journal on Advanced Science, Engineering and Information Technology 13, no. 6 (2023): 2361–71. http://dx.doi.org/10.18517/ijaseit.v13i6.19054.
Full textAbstract:
The performance comparison of Crossflow turbines is greatly influenced by the position of the nozzle in the conversion of water energy into mechanical energy that occurs through the blades, runners, and shafts of Crossflow turbines. The study aims to directly examine the visualization of water fluid dynamics across the turbine runner blade and enhance the performance of the Crossflow turbine by varying the nozzle position. This study intends to investigate the impact of water flow dynamics and emission on the performance of Crossflow turbines with a combined horizontal-vertical nozzle position, specifically focusing on the magnitude of the number of turbine blades driven and the size of the runner blade area. The objective of investigating nozzle position variations in Crossflow turbines is to determine the specific nozzle position at which the turbine blade may efficiently extract maximum energy from the water flow, hence optimizing turbine performance. The research method using models made using CAD software is AutoCAD by exporting to IGES or IGS format to be compatible with ANSYS. The simulation of this research is with post-processing. There are three, namely making animations, making contours, and taking data to compare cross-turbine performance using variations in nozzle position. Crossflow turbine performance with horizontal nozzle position torque and turbine power is lower, and there is an increase in a vertical position. Then, the horizontal and vertical nozzle position is very good because the nozzle is more effective with maximum turbine performance, namely 13.811-watt turbine power 1,099 turbine torque at 120 rpm.
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Dini Oktavitasari, Dominicus Danardono Dwi Prija Tjahjana, and Syamsul Hadi. "Experimental Investigation on The Wake Effect of Crossflow Wind Turbines." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 85, no. 2 (2021): 44–50. http://dx.doi.org/10.37934/arfmts.85.2.4450.
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An optimal design of an aligned configuration using a vertical axis wind turbine especially a crossflow wind turbine to increase rate and power production is one of the problems in wind energy. In the present work, an experimental investigation is presented to evaluate the impact of the wake effect on the dynamic performance of an aligned configuration and compared characteristics of the crossflow wind turbine for 12 x 12 number of blades. In arrays, the spacing parameters of the crossflow wind turbines were conducted with three different spacings (1D; 2D; and 3D) where a crossflow wind turbine was operating downstream of a co-rotating pair. The crossflow wind turbines arranged in inline configurations. Experiments were carried out in a closed-circuit WT-30 aerodynamic laboratory wind tunnel in a ratio velocity of 7.51 m/s. Measurement data of each wind turbines were reported in terms of dimensionless power coefficient (CP) and torque coefficients (CT) for dynamic performance analysis. The experimental results were aligned configuration spacing and the number of blades affects enhancement aerodynamic performance of the downstream crossflow wind turbines. The best performance turbine spacings in aligned configurations are 3D. Wind flow has a distance to be streamlined.
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Arifin, Zainal, Dominicus Danardono Dwi Prija Tjahjana, Suyitno Suyitno, et al. "Performance of Crossflow Wind Turbines in In-line Configuration and Opposite Rotation Direction." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 81, no. 1 (2021): 131–39. http://dx.doi.org/10.37934/arfmts.81.1.131139.
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Wind energy sources must be investigated to produce electrical energy from a renewable source. Crossflow wind turbines are suitable for use because they have several advantages such as self-starting ability, low noise, and excellent stability. They have the potential to be applied as small wind turbines in urban districts because of their small maximum coefficient of power (Cp), which is 10% of that of other small wind turbines. To enhance the performance of crossflow wind turbines, we changed the turbine to rotate in the opposite direction in the in-line configuration. Turbine performance testing was tested using a wind tunnel. The characteristics of crossflow wind turbines were investigated, then turbine performance was analyzed and discussed. The maximum power coefficient obtained was 0.169 (Cp) with the configuration of 12 turbine blades at a wind speed of 10 m/s. The maximum torque coefficient obtained was 0.703. The overall results show that the crossflow wind turbine in in-line configuration with opposite rotation can improve the performance of wind turbines.
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Adhikari, Ram, and David Wood. "Computational Analysis of a Double-Nozzle Crossflow Hydroturbine." Energies 11, no. 12 (2018): 3380. http://dx.doi.org/10.3390/en11123380.
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The crossflow turbines commonly used in small hydropower systems have a single nozzle. We are unaware of any studies of double-nozzle crossflow turbines which could have twice the power output of the single-nozzle design by doubling the flow through the same runner, with a high maximum efficiency. We present a computational analysis of a double-nozzle crossflow turbine, to determine the turbine efficiency and fundamental flow patterns. This work was based on a single-nozzle crossflow turbine with a maximum efficiency of 88%, one of the highest reported in the open literature through extensive experimental measurements. Previous numerical studies on this turbine have shown that the water flow in the runner was confined to less than half the runner periphery, implying that the other half could be used to double the runner power output by employing a second nozzle. We show that adding a second, identical nozzle without making any other changes to the design achieves a doubling of the power output. The dual-nozzle turbine, therefore, has the same efficiency as the original turbine. We also investigate the use of a slider to control the flow at part-load and show that part-load efficiency of the double-nozzle is very similar to that of the original turbine. This demonstrates the feasibility of using two nozzles for crossflow turbines.
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Rudy, Sutanto, and . Sujita. "Analysis of Variation in Loading of 26-Blade Crossflow Turbine in Hydroelectric Power Plant on the Torque Generated." Engineering and Technology Journal 9, no. 09 (2024): 5203–5. https://doi.org/10.5281/zenodo.13833510.
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Hydroelectric power plants are one of the alternatives in utilizing renewable energy sources. One of the main components in a hydroelectric power generation system is a water turbine. Water turbines function to convert potential energy into mechanical energy. This study uses a crossflow type water turbine. The choice of crossflow turbines is because the turbine has a low head range so that it does not require large water pressure to rotate the turbine shaft. The purpose of this study was to determine the effect of loading on the crossflow turbine on the torque produced. The methods used in this study were literature studies and experimental studies. The turbine blades used in this study used 26 blades by providing loading starting from the lowest to the maximum load point, namely 1 to 9 kg. The water discharge flowing into the turbine is fixed at 1 m<sup>3</sup>/minute. The results of this study indicate that the increasing load on the turbine, the average turbine rotation decreases by 14.31%. While the turbine torque increased by an average of 24.53%.
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Sritram, Piyawat, and Ratchaphon Suntivarakorn. "The Efficiency Comparison of Hydro Turbines for Micro Power Plant from Free Vortex." Energies 14, no. 23 (2021): 7961. http://dx.doi.org/10.3390/en14237961.
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In this research paper, the relationship between a crossflow turbine and propeller turbine size changes and the pond size in a free vortex power generation system was investigated. This relationship can be written in the form of a new mathematical equation using the principles of the response surface methodology (RSM) method. This study aimed to compare the efficiency of a crossflow turbine and propeller turbine to enhance a micro power plant from free vortex. The pond size in a micro power plant from free vortex was 1 m in diameter and 0.5 m in height with a 0.2 m outlet drain at the bottom. All turbines were tested at different water flowrates of 0.2, 0.3, 0.4, 0.5, and 0.6 m3/s to identify the rpm, water head, voltage, and electric current to access the waterpower, power output, and overall efficiency. At a 0.02 m3/s water flowrate, the crossflow turbine had greater overall efficiency than the propeller turbine, reaching 9.09% efficiency. From the comparison of the results of the two turbines used in the 0.5 m high cylinder-shaped generator pond, the turbine type, turbine size (height and diameter), number of blades, and water flowrate are key factors that affect the overall efficiency. The crossflow turbine can achieve greater efficiency than the propeller turbine in this generator system.
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Culaba, A. B., and I. V. Marfori. "Micro hydro crossflow turbine manufacturing cost analysis using optimization technique." IOP Conference Series: Earth and Environmental Science 1500, no. 1 (2025): 012007. https://doi.org/10.1088/1755-1315/1500/1/012007.
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Abstract Micro hydro crossflow turbines are machines used for the conversion of the kinetic and potential energy of falling water into mechanical energy. It is mainly used for small scale hydro applications of less than 100 kW. It is widely used in community-based power applications owing to its robustness, practicability, acceptable efficiency, and manufacturability. The electro-mechanical component of a micro hydro system gives a significant cost contribution, specifically the turbine component. Due to the simplicity of the crossflow turbine, many micro hydro developers opt to have local shops manufacture these turbines. The paper aims to analyze the manufacturing process of a typical crossflow turbine to accurately predict its cost. The analysis includes different manufacturing techniques and their cost and performance implications for the different parts of the turbine. A parametric three-dimensional model created using computer-aided design application was used to determine the dimensions, cutting length, and welding length of the turbine. The analysis was conducted considering different site-specific scenarios such as low head, medium head, and high head given constant power output. The results show that the cost of the crossflow turbine is significantly affected due to the water flow rate. At a higher water flow rate the crossflow turbine width widens, which significantly affects the machining time. Design changes and machining techniques also affect the cost and the performance of the turbine. An optimization technique was employed to minimize cost by selecting design characteristics that yielded an acceptable performance. The optimized results have shown a cost reduction of at least 20%.
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Marzuki, Marzuki, Ahmad Fauzi Pohan, Trengginas Eka Putra Sutantyo, and Asep Neris Bachtiar. "PEMBANGKIT LISTRIK TENAGA MIKRO HIDRO (PLTMH) MEMANFAATKAN AIR BUANGAN RUMAH TANGGA DI NAGARI SAWAH TANGAH, KECAMATAN PARIANGAN, KABUPATEN TANAH DATAR, SUMATERA BARAT." LOGISTA - Jurnal Ilmiah Pengabdian kepada Masyarakat 5, no. 2 (2021): 151. http://dx.doi.org/10.25077/logista.5.2.151-159.2021.
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Kondisi berbukit dan lokasi sungai yang jauh dari pusat pemukiman pada Nagari Sawah Tangah membuat masyarakat kesulitan untuk mengakses sumber air sebagai kebutuhan pokok maupun untuk irigasi persawahan. Saat ini, sumber mata air yang berlimpah pada Jorong Tuah Sakato, Nagari Sawah Tangah, sebagian telah dialirkan dari lembah yang dalam menuju rumah-rumah warga dan persawahan dengan menggunakan pompa listrik. Namun, hal ini membuat masyarakat memiliki biaya listrik yang besar untuk memenuhi kebutuhan air mereka. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk membantu biaya listrik masyarakat Nagari Sawah Tangah dengan membangun sistem Pembangkit Listrik Tenaga Mikro Hidro (PLTMH) dengan memanfaatkan air buangan yang tidak terpakai. Kegiatan dibagi menjadi beberapa tahapan, yaitu diawali dengan (1) melakukan peninjauan lokasi dan penyuluhan, (2) penentuan lokasi pemasangan dan rancangan pipa dan turbin crossflow, kemudian selanjutnya (3) pembuatan sistem sipil dan mekanik sistem turbin, dan (4) melakukan pengujian efisiensi sistem turbin, serta (5) pembinaan kepada masyarakat. Perbedaan ketinggian antara posisi bendungan dengan turbin crossflow sebesar 15°. Debit air yang melewati pipa menuju turbin mencapai 60 liter/detik. Keberhasilan sistem turbin ini mampu memeroleh daya sekitar 2600 W. Dengan demikian, kegiatan pengabdian ini mampu membuat biaya listrik yang ditanggung oleh masyarakat menjadi lebih murah.
 Kata kunci: Pembangkit Listrik Tenaga Mikro Hidro (PLTMH), Turbin crossflow, Efisiensi, Jorong tuah sakato, Nagari sawah tangah
 ABSTRACT
 The hilly conditions and the location of the river which is far from the center of settlement in Nagari Sawah Tangah make it difficult for the community to access water sources as basic needs and for irrigation of rice fields. Currently, the abundant springs in Jorong Tuah Sakato, Nagari Sawah Tangah, have been partially drained from a deep valley to people's homes and rice fields using electric pumps. However, this leaves the community with large electricity costs to meet their water needs. This community service activity aims to help the electricity costs of the Nagari Sawah Tangah community by building a Micro Hydro Power Plant (PLTMH) system by utilizing unused waste water. The activity is divided into several stages, starting with (1) conducting site inspections and counseling, (2) determining the installation location and design of pipes and crossflow turbines, then (3) making civil and mechanical turbine systems, and (4) conducting testing turbine system efficiency, and (5) community development. The difference in height between the position of the dam and the crossflow turbine is 15°. The flow of water that passes through the pipe to the turbine reaches 60 liters/second. The success of this turbine system is able to obtain a power of about 2600 W. Thus, this service activity is able to make the electricity cost paid by the community cheaper.
 Keywords: Micro Hydro Power Plant (PLTMH), Crossflow turbine, Efficiency, Jorong tuah sakato, Nagari sawah tangah
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Tahir, Muhammad Hamza, Shoukat Ali Mugheri, Salman Ahmad, et al. "Production of electricity employing sewerage lines using a micro cross flow turbine." International Journal of Engineering, Science and Technology 12, no. 2 (2020): 67–77. http://dx.doi.org/10.4314/ijest.v12i2.8.
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In the design of cross flow turbines, efficiency is a significant parameter. The crossflow turbine for developing nations is the most cost-efficient electricity generation source and often used in isolated power systems. This research work analyzes the potential of electricity production using a micro-cross flow turbine from sewage lines. To measure the hydraulic potential of the sewage’s wastewater, flow rate at the connection point was investigated by experimentation on site and the efficiency of the micro cross flow turbine was evaluated. The experimental results show that the hydraulic potential of the selected point for electricity production is enough throughout the year. It also shows that the micro-cross flow turbine can be used effectively to produce electricity from the sewage at the link points. The highest efficient 2 mm head was observed with a maximum flow rate of 0.112 m3/s. Depending on the flow rate, the turbine velocity was 103-263 rpm. The maximum power of shaft was 284.58 W and the highest power generated was 196.24 W. The maximum overall efficiency was 68.2%. This article discusses the design, efficiency, operation and cost of low-head micro crossflow turbines.
 Keywords: Electricity Generation, Hydraulic Potential, Micro Cross Flow Turbine, Sewage
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Effiandi, Nota, Yuliarman Yuliarman, and Ichlas Nur. "Turbin Crossflow untuk PLTMH di Sungai Karuah, Kelurahan Lambung Bukit, Kec Pauh, Padang." Jurnal Teknik Mesin 16, no. 2 (2023): 207–12. http://dx.doi.org/10.30630/jtm.16.2.1149.
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Utilization of electrical energy has been applied in almost all fields of life. One of them is the use of electricity to repel plantation pests. In the hills of Batu Busuk, around the Padang Karuah River, Kel Lambung Bukit, Kec. Pauh, Padang is one of the communities that has implemented the application. The people who are gardening there have worked together in making a Micro Hydro Power Plant (PLTMH) type waterwheel with a power of 1 kW with the current condition has been damaged and can not be used anymore. Seeing the potential of water owned according to the results of the field survey with a flowrate of 100 L / s and a head of 5 m, the use of crossflow turbines is one type of turbine that is suitable for replacing a windmill that has been damaged with a power generated of 3.7 kW. The crossflow turbine has an outer diameter of runner (D1) 0.3 m, runner width (L) 0.2 m and the number of blades (z) 28 pieces. With the use of the crossflow turbine, the potential of water will be maximally utilized.
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Apriani, Yosi, Herlinda Herlinda, Zulkiffli Saleh, Wiwin Oktaviani Anwar, and Ian Mochamad Sofian. "OPTIMIZING CROSSFLOW TURBINE BLADES FOR POWER ENHANCEMENT AT PICO HYDRO POWER PLANT (PLTPH) USING ANSYS FLUENT." Jurnal Media Elektrik 22, no. 1 (2025): 76–82. https://doi.org/10.59562/metrik.v22i1.5731.
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Renewable energy has become an important solution in dealing with the problem of climate change and resource scarcity. This study aims to analyze the effect of variations in the number of Crossflow turbine blades on output power at the Pico Hydro Power Plant (PLTPH). PLTPH is a water-based power plant with less than 5 kW of power, ideal for remote areas. Simulations were performed using SolidWorks software for turbine geometry design, Computational Fluid Dynamics (CFD), and ANSYS Fluent for fluid flow simulation. The simulation results show that the number of spoons and the speed of the water flow have a significant impact on the power produced. The optimal configuration is found on a 20-blade turbine that produces a maximum power of 4,695 Watts at a flow rate of 6 m/s. These findings can guide the efficient design of Crossflow turbines for PLTPH applications in remote areas.
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Sigit Setya Wiwaha, Ferdian Ronilaya, Sri Wahyuni Dali, Farhan Dhiya Ulhaq, M. Naufal Fariz Muhfid, and Ricky Setyawan. "Rancang Bangun Turbin Crossflow Pada Spiral Vortex Turbine House Sebagai Pembangkit Listrik Tenaga Pikohidro." ELPOSYS: Jurnal Sistem Kelistrikan 8, no. 3 (2021): 35–40. http://dx.doi.org/10.33795/elposys.v8i3.74.
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Javan Langur Center merupakan pusat rehabilitasi lutung jawa yang berada di tengah hutan Coban Talun. Di kawasan tersebut terdapat sungai yang bisa dijadikan sebagai Pembangkit Listrik Tenaga Pikohidro dengan turbin crossflow sebagai komponen utamanya. Pemilihan turbin crossflow bertujuan untuk menganalisis desain terbaru dari turbin crossflow, mengetahui pengaruh jumlah sudu terhadap kecepatan putaran turbin pada sistem PLTPH dan pengaturan debit untuk mendapatkan keluaran yang maksimal. Penelitian diawali dari pembuatan desain secara 2D kemudian dilanjutkan secara 3D dan aplikasikan dalam bentuk nyata. Pengumpulan data dilakukan dengan membuat alur kerja keseluruhan proses dengan metode analisis menggunakan perbandingan data pengujian dan pengukuran di lapangan. Setelah pengambilan data dan analisis turbin pada bukaan intake 100% menghasilkan kecepatan turbin sebesar 52 rpm tanpa puli dan menghasilkan keluaran 18 volt dengan arus 0,31 A ketika terhubung ke baterai.
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Williams, S. Ebhota, and Y. Tabakov Pavel. "Simplified and Precise Design of Crossflow Turbine Power Transmission Components." International Journal of Engineering and Advanced Technology (IJEAT) 10, no. 3 (2021): 227–32. https://doi.org/10.35940/ijeat.C2136.0210321.
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Despite the merits of small hydropower (SHP), coupled with the perennial inadequate and unreliable electricity supply in SSA, the huge SHP potential in the region is hugely untapped. This is largely attributed to the lack of adequate technical components for the development of SHP turbines, which are: technical personnel, and production facilities in the region. The hydraulic power possessed by flowing water in SHP resources can be harnessed and transformed into usable electrical energy via the deployment of a hydro turbine plant. Commonly used hydro turbines include crossflow (CFT), Pelton, Turgo, and Francis turbines. Amongst these turbines, CFT is mostly applied in low head sites and has efficiency ranging from 70–85%. The CFT power transmission subsystem is considered vital to its performance; the shaft, which transmits the generated motion to drive the alternator, is the most critical part of the CFT transmission subsystem and it requires careful design and production processes. This study centres on the development of a simplified systematic design process for power transmission shaft, pulley, and belt, to facilitate CFT power generation efficiency. .Further, the study is geared towards boosting CFT technology capacity domestically for the benefit of local production. The hydrological properties of the Ayiba SHP site in Osun state, Nigeria, were adopted for this work as a case study. The head and power for this resource are 11.8 m and 122.4 kW, respectively, and are served as the fundamental parameters for the design of the power transmission subsystem. The design computation shows that a shaft of diameter 65 mm and a D-type of V-belt with a corresponding pulley will be required to transmit the generated turbine power to the alternator. A 3-D model was created based on the design values and this was used to validate the integrity of the shaft by static stimulation. The simulation result, which is based on von Mises was satisfactory as the highest stress obtained in the shaft was 205 N/mm2; resulting in a 2.6 factor of safety.
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Gallagher, Ronan Patrick, Carwyn Frost, Pál Schmitt, and Charles Young. "Review of experimental studies on Transverse Axis Crossflow Turbines." International Marine Energy Journal 5, no. 2 (2022): 161–71. http://dx.doi.org/10.36688/imej.5.161-171.
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Transverse Axis Crossflow Turbines (TACTs) are a niche subset of tidal turbines. TACTs are not as well understood as the more traditional horizontal axis turbine and associated flow theory which leans heavily on advances in wind energy and marine propulsion. This paper reviews laboratory and field based experimental fluid dynamics work from the perspective of turbine performance. The available literature deviates significantly in perspective and scope since it is found that not all papers declare a full complement of parameters, thereby making it difficult to check or validate the respective results. Therefore, identifying trends amongst the variable and sparse datasets is difficult. None of the papers reviewed cite adherence to the recommended tank testing guidelines. The work reviewed analyses aspects such as mounting supports, solidity, blockage and blade support locations in isolation, but the cumulative impact of these variables is unknown. Arising from the analyses carried out as part of this review, blade loading, solidity and blockage were identified as key parameters and are the subject of planned research. Trends between solidity and blockage with tip speed ratio were identified. This paper contributes to the understanding of TACT performance through the tidal turbine performance curve and highlights the need for comprehensive physical testing and model validation.
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Heneka, C., A. Schulz, and H.-J. Bauer. "Influence of internal parallel and v-shaped ribs on the discharge coefficient of a cylindrical film cooling hole." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 225, no. 7 (2011): 985–94. http://dx.doi.org/10.1177/0957650911410926.
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An experimental study has been conducted to investigate the discharge behaviour of cylindrical film cooling holes with the main focus on the effects of rib arrangement and crossflow velocity inside the internal cooling passage of a gas turbine blade. Two straight flow channels of rectangular cross-section simulate the crossflow situations present at the inlet and outlet of a filmcooling hole. The two channels are connected by a single scaled-up film cooling hole with adiameter of 10 mm, an inclination angle of 30°, and a length-to-diameter ratio of 6. Measurements have been performed at various internal crossflow Mach numbers and rib geometries for both parallel and perpendicular orientations of internal and external crossflows. Parallel and v-shaped ribs with quadratic cross-section and four different angles with respect to the internal crossflow direction (45°, 60°, 75°, and 90°) have been placed upstream and downstream of the entrance of the hole at one wall of the cooling passage. The rib height equals the hole diameter, the rib pitch to height ratio is 10. The internal crossflow Mach number has been varied between 0 and 0.37. The data show that placing ribs onto the wall of the coolant passage may result in reduced, unchanged, or even increased discharge coefficients. Internal crossflow Mach number and orientation of the coolant passage in respect to the hole axis have been identified as major influencing parameters.
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Abel Alfeuz, Fadzlita Tamiri, Farm Yan Yan, et al. "Performance Analysis of a Crossflow Vortex Turbine for a Gravitational Water Vortex Power Plant." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 116, no. 2 (2024): 13–26. http://dx.doi.org/10.37934/arfmts.116.2.1326.
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The micro hydro system is the most favorable renewable energy source to supply electricity for rural areas. The Gravitational Water Vortex Power Plant (GWVPP) is one of the micro hydro systems that is suitable for very low-head hydropower sites. GWVPP consists of three major parts: electromechanical components, civil structures, and electric distribution. The micro hydro turbine in GWVPP is called a vortex hydro turbine and is used to convert induced vortex flow to mechanical energy coupled with a generator to produce electricity. This paper investigates crossflow vortex turbine performance using Computational Fluid Dynamics (CFD) software and experimental work. The CFD results provide qualitative and quantitative comprising velocity distribution, water vortex profile, and water vortex height. The optimum hydraulic performance in the water vortex was observed and determined for different turbine positions. The vortex crossflow turbine was placed 0.05 m from the bottom surface of the basin at the highest vortex tangential velocity. A 0.05 m turbine position was chosen for the turbine installations as it creates a high-velocity profile. The comparative performance was conducted on the vortex crossflow blade with different inlet blade angle designs at a range of 400 – 700. The experimental analysis was conducted at rotational speeds of 30 rpm – 70 rpm to determine its efficiency performance. The optimum design for the crossflow blade was at 500 with an operational speed of 50 rpm, which exhibited torque and power output at 0.27±0.02 m and 1.49±0.08 m respectively with an efficiency recorded at 18.98%.
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Lin, Shueei-Muh, Wei-Le Huang, Didi Widya Utama, and Yang-Yih Chen. "Design and Analysis of a Novel Ocean Current Two-Coupled Crossflow Turbine Energy Converter." Energies 18, no. 9 (2025): 2303. https://doi.org/10.3390/en18092303.
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In this study, a novel ocean current energy converter is proposed. The energy converter is composed of two crossflow turbines. The two turbines rotate at the same speed but in opposite directions; therefore, the summation of the hydrodynamic torques applied to the two turbines is equal to zero, which can make the converter self-stabilizing. A channel is designed to guide a large amount of water flowing through the turbine, thereby increasing the incident velocity, power, and efficiency of the turbine. The guide vanes are positioned in front of the turbine to guide the ocean current, producing the optimal flow incident angle and thereby increasing the performance of the turbine. A novel empirical formula for determining the power and efficiency of the converter is derived. Moreover, a computational fluid dynamics (CFD) analysis of the energy converter is conducted using the commercial software Star CCM+ in the standard κ-ω turbulence model with wall functions. The accuracy of the empirical formula is verified by comparing the theoretical results with those obtained using the CFD method. Finally, the effects of several parameters on the performance of the energy converter are investigated. The optimal parameters are obtained as follows: (1) The optimal setting angles of vanes γ1 = 78°, γ2=γ1+10°, and γ3=γ1−5°. (2) The optimal blade angle β = 44°. (3) The optimal rotating speed N = 2.6 (Vcur/1.6) rpm. (4) The optimal ratio of turbine center distance rL4 ≥ 2.50. (5) The optimal ratio of turbine shaft length is approximately 5.5 < (rshaft = Wshaft/Dtur)opt < 5.7. (6) The performance of each turbine with Nblade = 31 blades is significantly better than that with Nblade = 23 blades.
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Tiwari, Manchan, and Rajendra Shrestha. "Effect of Variation of Design Parameters on Cross Flow Turbine Efficiency Using ANSYS." Journal of the Institute of Engineering 13, no. 1 (2018): 1–9. http://dx.doi.org/10.3126/jie.v13i1.20340.
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Most of the major micro hydro power plants in Nepal uses Crossflow turbine for power generation which are manufactured locally. However, efficiency of these turbines has not been tested and verified. In this research, Cross flow turbine designs were obtained from local manufacturers. Efficiencies of these turbines were determined using simulation under steady state condition. Efficiencies were verified using the data from the installation site where these designs were used. Different Cross flow turbine models were prepared by varying the curvature radius of the blade and the ratio of inner to outer radius of the runner. The efficiencies of such models were determined using simulation.Journal of the Institute of Engineering, 2017, 13(1): 1-9
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Apriani, Yosi, Syarif Hidayat, Zulkiffli Saleh, Wiwin A. Oktaviani, and Ian Mochamad Sofian. "Modeling Design of Picohydro Power Generation System Using Crossflow Turbine." East Asian Journal of Multidisciplinary Research 3, no. 4 (2024): 1501–12. http://dx.doi.org/10.55927/eajmr.v3i4.8830.
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The goal of this project is to learn how to use a Crossflow turbine to create a Picohydro power plant system modeling. The manufacturing process, from design to evaluation, is the methodology employed. The turbine type utilized is a crossflow turbine, measuring 26 cm in outer diameter, 17.3 cm in inner diameter of the blade runner, and up to 35 pieces of blades. The calculations show that the distance between the blades is 2.3 cm, the blade length is 8.5 cm, the blade width is 4.4 cm, and the radius of curvature of the blade is 2.8 cm. The test results without load obtained the highest turbine rotation of 421 Rpm produces a voltage of 7.29 V before going through the boost converter.
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Sinagra, Marco, Tullio Tucciarelli, Calogero Picone, Costanza Aricò, and Marwa Hannachi. "Design of Reliable and Efficient Banki-Type Turbines." Environmental Sciences Proceedings 2, no. 1 (2020): 49. http://dx.doi.org/10.3390/environsciproc2020002049.
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A new shape for the external surface of the Crossflow turbine blades is proposed, which allows for the preservation of hydraulic efficiency in spite of a significant maximum blade thickness providing mechanic robustness and reliability. The final shape of the blades is assessed using an iterative solution for two uncoupled models: a 2D computational fluid dynamic (CFD) and a structural 3D finite element method (FEM) analysis of a single blade. Application of the proposed methodology to the design of a power recovery system (PRS) turbine, a new backpressure Crossflow-type inline turbine for pressure regulation, and energy production in a real Sicilian site follows.
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Laksmana, Satria Candra, A'rasy Fahruddin, and Ali Akbar. "Pengaruh Sudut Pengarah Aliran Pada Turbin Air Crossflow Tingkat Dua Terhadap Putaran dan Daya." R.E.M. (Rekayasa Energi Manufaktur) Jurnal 3, no. 1 (2018): 35. http://dx.doi.org/10.21070/r.e.m.v3i1.1591.
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The potential of hydro energy is very large both for large scale and for small scale. Until now, the need for energy continues to increase, so that energy is a very important element in the development of a country or a region. Cross-flow turbines are one type of turbine that is often used for PLTMH. In this study planning a cross-flow water turbine applied to the height and amount of water per second in the irrigation channel water flow, this water flow will rotate the turbine shaft to produce mechanical energy. With variations in the direction of the turbine flow direction, namely 30o, 35o, and 40o, and the same variation of water discharge 10,5 L / s, 21 L / s and 31,5 L / s to determine the effect on the rotation and the power produced. In this study with 12 turbine blades, 30o blade angle, 40o flow direction angle, and 31.5 L / s water discharge obtained the highest first stage turbine rotation value is 478 rpm. Whereas at the flow direction angle of 30o with the same water discharge which is 31.5 L / s so that the first stage of the turbine is obtained is 296 rpm.
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Suhaime, M. A., E. Mat Tokit, F. A. Z. M. Sa’at, et al. "Preliminary theoretical design of crossflow water turbine for rainwater rooftop harvesting system." IOP Conference Series: Earth and Environmental Science 1281, no. 1 (2023): 012024. http://dx.doi.org/10.1088/1755-1315/1281/1/012024.
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Abstract Harvesting energy is essential especially now that the demand of energy is high but the fuel supply is limited. This study theoretically designs the 5 m low head crossflow turbine in rainwater harvesting system. The characteristics of the site condition, the runner geometry, the blade geometry, and the turbine specification had been identified and the geometrical model of the design is shown. This paper reported the collection of theoretical formula for the design of low head crossflow turbine that can be used for rainwater harvesting system. The dimensional form of equations, as presented in Section 2, resulted to the two, four, and two parameters that represent the dimensions of the turbine, runner and the blade, respectively. As a conclusion, the designed turbine can be used for rainwater harvesting system with an efficiency that was calculated to be 88% with 22 kW expected power generated for 5 m head.
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Ebhota*, Williams S,, and Pavel Y. Tabakov. "Simplified and Precise Design of Crossflow Turbine Power Transmission Components." International Journal of Engineering and Advanced Technology 10, no. 3 (2021): 227–32. http://dx.doi.org/10.35940/ijeat.c2136.0210321.
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Despite the merits of small hydropower (SHP), coupled with the perennial inadequate and unreliable electricity supply in SSA, the huge SHP potential in the region is hugely untapped. This is largely attributed to the lack of adequate technical components for the development of SHP turbines, which are: technical personnel, and production facilities in the region. The hydraulic power possessed by flowing water in SHP resources can be harnessed and transformed into usable electrical energy via the deployment of a hydro turbine plant. Commonly used hydro turbines include crossflow (CFT), Pelton, Turgo, and Francis turbines. Amongst these turbines, CFT is mostly applied in low head sites and has efficiency ranging from 70–85%. The CFT power transmission subsystem is considered vital to its performance; the shaft, which transmits the generated motion to drive the alternator, is the most critical part of the CFT transmission subsystem and it requires careful design and production processes. This study centres on the development of a simplified systematic design process for power transmission shaft, pulley, and belt, to facilitate CFT power generation efficiency. .Further, the study is geared towards boosting CFT technology capacity domestically for the benefit of local production. The hydrological properties of the Ayiba SHP site in Osun state, Nigeria, were adopted for this work as a case study. The head and power for this resource are 11.8 m and 122.4 kW, respectively, and are served as the fundamental parameters for the design of the power transmission subsystem. The design computation shows that a shaft of diameter 65 mm and a D-type of V-belt with a corresponding pulley will be required to transmit the generated turbine power to the alternator. A 3-D model was created based on the design values and this was used to validate the integrity of the shaft by static stimulation. The simulation result, which is based on von Mises was satisfactory as the highest stress obtained in the shaft was 205 N/mm2; resulting in a 2.6 factor of safety.
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Muhammad Fahmi Hakim, Mohammad Shobir Farid, Mohammad Noor Hidayat, Awan Setiawan, and Rohmanita Duanaputri. "Design of Crossflow Turbine for Picohydro Power Plant in Singosari, Malang." International Journal of Frontier Technology and Engineering 1, no. 2 (2023): 85–94. http://dx.doi.org/10.33795/ijfte.v1i2.4278.
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In the area around PPYD Al Ikhlas Singosari, Malang, there is a river with a fast enough flow that can be used as a hydroelectric power plant as estimated. After investigation, it was found that the potential electrical power that could be generated was 1,118.56 Watts so it was classified as a pico hydro power plant. Therefore, in this research, one of the main parts of the pico hydro power plant, namely the turbine, was designed. The type of turbine designed is a crossflow turbine with an outer diameter of 75 cm and an inner diameter of 3 cm, the width of the runner blades is 40 cm, the distance between the blades is 36 cm, the radius of curvature of the blades 33 cm, the number of 10 blades can produce 843.74 watts of power with a turbine efficiency of 75.43%. So, it can be concluded that the crossflow turbine has good efficiency.
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Sinagra, Marco, Calogero Picone, Costanza Aricò, et al. "Impeller Optimization in Crossflow Hydraulic Turbines." Water 13, no. 3 (2021): 313. http://dx.doi.org/10.3390/w13030313.
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Crossflow turbines represent a valuable choice for energy recovery in aqueducts, due to their constructive simplicity and good efficiency under variable head jump conditions. Several experimental and numerical studies concerning the optimal design of crossflow hydraulic turbines have already been proposed, but all of them assume that structural safety is fully compatible with the sought after geometry. We show first, with reference to a specific study case, that the geometry of the most efficient impeller would lead shortly, using blades with a traditional circular profile made with standard material, to their mechanical failure. A methodology for fully coupled fluid dynamic and mechanical optimization of the blade cross-section is then proposed. The methodology assumes a linear variation of the curvature of the blade external surface, along with an iterative use of two-dimensional (2D) computational fluid dynamic (CFD) and 3D structural finite element method (FEM) simulations. The proposed methodology was applied to the design of a power recovery system (PRS) turbine already installed in an operating water transport network and was finally validated with a fully 3D CFD simulation coupled with a 3D FEM structural analysis of the entire impeller.
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Monica, Nikhil Deoghare. "Finite Element Analysis (FEA) of Helical Tidal Turbine." International Journal of Innovative Science and Research Technology (IJISRT) 9, no. 11 (2024): 1633–39. https://doi.org/10.5281/zenodo.14273835.
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The spiral turbine assembly can provide unidirectional rotation at ultra-high speed, lower than the multi-directional ultra low head fluid provided. The assembly consists of a series of spiral turbine units or modules arranged vertically or horizontally to harness the power of water or wind, for example. Each turbine unit or module has multiple spiral blades and an airfoil. The wind energy modules can be connected to a rotating shaft supported by a light weight on the ground of the men. Spiral turbines can also use the power of ocean waves to provide thrust for ships. In other embodiments, a cylindrical distributor is provided in the helical turbine to direct the fluid flow to the turbine blades, thus increasing efficiency and power output. In this paper, simulation analysis is performed using finite element analysis techniques with the help of Ansys to evaluate the overall performance of helical and straight blade crossflow hydroelectric turbines with linear horizontal/vertical mode and the like. The duration, diameter and hydrofoil type of each generator are assumed to be equal.
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Budea, Sanda. "Assessments regarding the performances of wind turbines from the roofs of buildings." E3S Web of Conferences 404 (2023): 02005. http://dx.doi.org/10.1051/e3sconf/202340402005.
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In the current energy context, wind energy remains the main renewable energy source. Greater attention should be paid to small-sized wind turbines, mounted on the roofs of buildings, for their many advantages: easy to construct, do not require additional space, easy maintenance, eliminate losses from the system and transport costs, can provide alone or in addition to energy solar, the entire energy need of buildings, etc. The present paper analyzes three models of wind turbines that can be placed on the roofs of buildings: crossflow wind turbine Banki, ridge blade turbine and aeroMINE model. The analysis refers to their constructive solutions, the working principle, the optimal design for a good power coefficient and the energy that can be obtained with these small turbines for urban applications and not only.
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Pradisha, Kukuh Lintang. "PENGARUH JUMLAH SUDU TERHADAP DAYA DAN EFISIENSI TURBIN AIR CROSSFLOW UNTUK PEMBANGKIT LISTRIK TENAGA PICO HIDRO." NOZEL Jurnal Pendidikan Teknik Mesin 5, no. 2 (2023): 93. http://dx.doi.org/10.20961/nozel.v5i2.72139.
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<p align="justify"><em>Indonesia has the potential for water energy that can be utilized as a pico-scale hydroelectric power plant or PLTPH. Water is a renewable energy (EBT) which has the potential to be developed in Indonesia due to the geographical conditions that have a lot of water in mountainous areas as well as irrigation for residential areas. Water turbines can convert water energy into electrical energy. One type of turbine that can be utilized is a crossflow water turbine. This study aims to determine the effect of the number of blades with the use of a nozzle on the power and efficiency of the turbine produced by the crossflow water turbine. The study used experimental methods, the data obtained were analyzed using quantitative descriptive analysis techniques. </em><em>Variations in the number of blades used in the study were blades with a total of 18 blades, 20 blades, and 22 blades, as well as variations in the angle of attack of the nozzle used, namely 20⁰, 25⁰, 30⁰, 35⁰, and 40⁰. The results showed that there was an effect of using the number of blades and nozzle diameter. The power and efficiency of the turbine fluctuate based on the water discharge. The highest data was obtained at a water discharge of 25.33 l/m, namely using a number of 22 blades using a nozzle diameter of 7 mm to produce 9.47 watts of electric power with an efficiency of 58%.</em><em></em></p>
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Keawsuntia, Yuttachai. "Design and Test of Pico Crossflow Turbine for the Generation of Electricity for Use in the Rural Area." Applied Mechanics and Materials 496-500 (January 2014): 605–8. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.605.
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Pico hydro turbine is an alternative technology for electricity generating from small hydropower. It is suitable for use in a rural area because of the constructions are cheap and the techonogies involved are conventional. This research paper presents the designing and the testing results of the electricity generating from the pico crossflow turbine, for save in a battery 12 V. A testing of pico crossflow turbine with 0.8 m diameter of wheel and a 20 blades water turbine which has a semi-circle shape at 0.1 m diameter of blade, the length of the blade is 0.8 m, tested in river, showed that the system gives the best electrical power of 145.42 watts or 3.49 kW-hr per day, enough to supply for up to 6 families of small community in the rural area and the rate of return for electricity generating at 0.023 USD per kW-hr.
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Shrestha, O., A. Kapali, B. Thapa, H. P. Neopane, and Y. H. Lee. "Experimental study of Crossflow turbine under different operating conditions." IOP Conference Series: Earth and Environmental Science 1037, no. 1 (2022): 012033. http://dx.doi.org/10.1088/1755-1315/1037/1/012033.
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Abstract In the present study, experiments were conducted to investigate the performance of Cross-flow turbines (CFT). A CFT runner with 16 degrees of angle of attack and a ratio of 0.67 inner to the outer diameter is selected for the experiment. The efficiency of the turbine was studied using a 3D printed runner with 30 blades at a constant head of 10m and varying rpm from 350 to 750 with an increment of 100 rpm and guide vane opening ranging from 10% to 100% with an increment of 10%. The results of the study indicate that CFT can be used effectively as it contains a flat curve that works well over wide flow conditions. CFT efficiency increases with increasing rpm to a certain point, after which it begins to decrease with increasing rpm.
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Putra, Fajri Dwi, Nota Effiandi, and Desmarita Leni. "Pengoperasian dan Perawatan PLTMH pada Pembangkit Listrik Mikro Hidro (PLTMH) di Sungai Batang Geringging Kota Padang." Jurnal Teknik Mesin 10, no. 2 (2019): 25–30. http://dx.doi.org/10.30630/jtm.10.2.183.
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Water turbine is a tool to convert the potential energy of water into mechanical energy, this mechanical energy is then converted into electrical energy by a generator. Crossflow turbines are radial, small pressurized turbines with tangential injection from fan rotation with a horizontal shaft. The flow of water flows through the pipe entrance, and is arranged by a propeller and into the turbine fan rotation. After the water passes through the turbine fan rotation, the water is at the opposite fan rotation, thus providing additional efficiency. Finally, water flows from the casing either freely or through a tube under the turbine so that it rotates and turns the generator so it can produce electricity. Maintenance of PLTMH is carried out namely preventive maintenance such as; cleaning, lubrication and periodic checks. Maintenance corrections are carried out with the aim of being able to maintain the PLTMH component. Predictive maintenance of a treatment carried out in accordance with the conditions of the PLTMH and predicting damage that will occur in PLTMH
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Santoso, Budi, and Dominicus Danardono Dwi Prija Tjahjana. "The Influence of Guide Vane to the Performance of Cross-Flow Wind Turbine on Waste Energy Harvesting System." MATEC Web of Conferences 159 (2018): 02014. http://dx.doi.org/10.1051/matecconf/201815902014.
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The purpose of this experiment is to know the influence of a single guide vane position and angle to the performance of a cross-flow wind turbine. The cross-flow wind turbine was positioned at the discharge outlet of a cooling tower model to harness the discharged wind for electricity generation. A guide vane was used to enhance the rotational speed of the turbines for power augmentation. Various position and angle of attack of the guide vane were tested in this experiment. To avoid negative impact on the performance of the cooling tower fan and to optimize the wind turbine performance, the turbine position on the discharge wind stream was also studied. The result showed that cross-flow wind turbine with a guide vane attached at the right position had a higher coefficient of power than cross flow turbine without guide vane. A crossflow wind turbine with the guide vane at the position of 150 mm from the center and 30° angles had the highest coefficient of power of 0.49. Comparing to the wind turbine without guide vane, the coefficient of power of the cross-flow wind turbine was increased about 84.3%.
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Fahrudin, Fahrudin, Fitri Wahyuni, and Dini Oktavitasari. "Studi Eksperimen Pengaruh Jumlah Sudu Terhadap Kinerja Wind Turbine Crossflow." Jurnal Rekayasa Mesin 16, no. 2 (2021): 218. http://dx.doi.org/10.32497/jrm.v16i2.2555.
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<p>Wind is an alternative energy that is environmentally friendly and sustainable. Therefore, we need a type of wind turbine that can receive wind from all directions. The crossflow type vertical axis wind turbine has a high torque coefficient at a low tip speed ratio. The purpose of this study was to determine the effect of the number of blades on the performance of the vertical axis crossflow wind turbine. The experimental test was carried out by varying the number of blades. The configuration is analyzed using the experimental wind tunnel test scheme which has been modified in the section test section. The results showed that the number of blades 16 has a power coefficient ( ) = 0.23 tip speed ratio (TSR) = 0.42 at a wind speed of 4 m / s.</p><p><strong><br /></strong></p>
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Virgunia, D. A., I. W. Sukerayasa, W. G. Ariastina, et al. "PERANCANGAN PLTMH SUNGAI YEH HA DI KARANGASEM DENGAN TURBIN CROSSFLOW." Jurnal SPEKTRUM 11, no. 1 (2024): 256. http://dx.doi.org/10.24843/spektrum.2024.v11.i01.p29.
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Yeh Ha River in Ababi Village, Karangasem Regency, Bali, is a river that originates from the Yeh Ha springs and is used as a bathing place. This river has the potential for a new renewable energy source that can be utilized for the Micro Hydro Power Plant (MHPP). Discharge measurements were carried out for a week on one of the Yeh Ha spring source channels during the dry season. The results showed an average discharge of 0.201 m3/s. The discharge data used is the minimum potential energy that can be absorbed. Based on the measured discharge data and the used head of 4.6 m, the Tanaka Suiryoku Turbine Selection Chart shows that the crossflow turbine meets the turbine selection criteria. The results of the analysis and calculations show that the available power at the turbine is 8 kW with an efficiency of 80%. A 3-phase synchronous generator with a permanent magnet rotor was selected based on a comparison of the types, specifications, and characteristics of the generator to match the turbine capacity. The output power generated by the generator is 6 kW with a rotational speed of 1500 rpm and a generator efficiency of 90%.
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Williams Saturday Ebhota and Pavel Yaroslavovich Tabakov. "Deployment of Design Sequence for Crossflow Turbine Functionality Enhancement." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 103, no. 2 (2023): 118–40. http://dx.doi.org/10.37934/arfmts.103.2.118140.
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The grossly untapped hydro potential in the global south is attributed to the inadequate technical personnel; as one of the main factors limiting the design and manufacturing of efficient small hydropower (SHP) turbine plants. The technical personnel and production facilities available in the global south, especially in sub-Saharan Africa (SSA), cannot support the development of these components sufficiently. The study presents the CFT design process in a clearer and simplified manner. To bridge the technical knowledge gap, the study presents an improved SHP system design procedure through a partly isolated-based design sequence. The entire design process of the SHP turbine, with a focus on crossflow turbine (CFT), was divided into sections, subsections, and parts. The study presents connections between geometry, operation, and functionality of design parameters for CFT components, such as runner, shaft, pulley, and belt graphically and in tabular forms.
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Plesniak, Michael W. "Noncanonical Short Hole Jets-in-Crossflow for Turbine Film Cooling." Journal of Applied Mechanics 73, no. 3 (2005): 474–82. http://dx.doi.org/10.1115/1.2130359.
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This paper presents a review of research done over the past several years at Purdue on non-canonical jets-in-crossflow. It is a retrospective and an integrative compilation of results previously reported as well as some new ones. The emphasis is on jets emanating from “short” holes, with length-diameter ratios of one or less. A canonical jet-in-crossflow configuration is one in which a fully developed jet issues from a long pipe fed by a large plenum, into a semi-infinite cross flow. The configuration presented here is noncanonical in the sense that jet issues from a short hole and thus the flow is unable to “adjust” to the hole, unlike the case of a long hole in which fully developed pipe flow can be attained. This is motivated by gas turbine film cooling applications. Experimental results acquired with particle image velocimetry will primarily be presented, with some complementary information gained from RANS simulations of the flow. Many different aspects of the problem have been investigated, and in this paper the focus will be on structural features within the hole and in the developing jet and crossflow interaction. A significant result is that the in-hole vortical structures, depending on their sense of rotation, tend to augment or weaken the primary counter-rotating vortex pair. This impacts global features such as jet trajectory and spreading.
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Kartono, N. A., C. G. Indra Partha, W. G. Ariastina, I. A. D. Giriantari, I. N. Satya Kumara, and I. W. Sukerayasa. "ANALISIS PENGARUH VARIASI DEBIT AIR TERHADAP KECEPATAN PUTARAN TURBIN CROSSFLOW PADA PEMBANGKIT LISTRIK TENAGA MIKROHIDRO." Jurnal SPEKTRUM 10, no. 2 (2023): 43. http://dx.doi.org/10.24843/spektrum.2023.v10.i02.p6.
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The Yeh Dikis River in Tabanan Regency Bali has a natural environment which is considered suitable to be used as a tourism destination. The factor that supports the Yeh Dikis River to become a tourism object is the river's potential to generate electricity. In this paper, a particular turbine for micro-hydro power plant is designed. The Yeh Dikis River has a water discharge of 0.381 m3/s with a head value of 8.2 meters, with a potential output power of 18.15 kW. The value of the water discharge and the output power are used to determine the type of turbine used. The computation and simulation showed that the crossflow turbine is suitable for the power plant. The analysis showed that a water discharge of 0.381 m3/s with a penstock diameter of 0.44 meters produces a specific rotational speed of 186 rpm; while a water discharge of 0.381 m3/s with a penstock diameter of 0.55 meters produces a turbine specification rotation speed of 160 rpm. This indicated that the effective head value affects the determination of the penstock diameter and the water velocity. The smaller diameter of the penstock produces, the higher the velocity of the water flow in the pipe. A low effective head will result in a low specific rotational speed. It was found that the optimum turbine power output for a water discharge of 0.381 m3/s with a penstock diameter of 0.44 meters is 18.15 kW. The work of the crossflow turbine is validated using a turbine simulator to determine the rotational speed of the turbine for a particular torque.
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Andi Dinata, Putu, I. Wayan Arta Wijaya, and I. Made Suartika. "PENGARUH VARIASI JUMLAH SUDU TERHADAP DAYA OUTPUT PADA PROTOTYPE PEMBANGKIT LISTRIK TENAGA MIKRO HIDRO (PLTMH) DENGAN MENGGUNAKAN TURBIN CROSSFLOW." Jurnal SPEKTRUM 7, no. 3 (2020): 34. http://dx.doi.org/10.24843/spektrum.2020.v07.i03.p5.
Full textAbstract:
Crossflow turbine is a type of turbine that often used as a prime mover in MHP system. thistype of turbine has an advantage witch can be applied in low head with high water discharge. Theoutput power from this turbine is effected by the number of blades that installed on the tubine runner.The aim of this study is to hold an experimental study of the number of blade that used on crossflowturbine to get the maximum output power. The number of blade that used is 10, 14, 18, 22, and 26blades. Where from the result of calculations, it is found that turbine with number of blades 18 hasthe higest efficiency with a value of 8,52%.
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Suyanto, M., Syafriudin Syafriudin, Anas Cahyo Nugroho, Prasetyono Eko P, and Subandi Subandi. "Perancangan sistem Pembangkit Listrik Pico Hydro Putaran Rendah Menggunakan Turbin Screw." Journal of Electrical Power Control and Automation (JEPCA) 4, no. 1 (2021): 15. http://dx.doi.org/10.33087/jepca.v4i1.47.
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Kinerja sebuah screw turbine dipengaruhi oleh parameter-parameter yang terkait dalam perancangan screw turbine itu sendiri. Salah satu parameter penting dalam perancangan screw turbine adalah pitch atau jarak periode dari sebuah sudu (blade), sudut kemiringan, putaran dan debit air Kebutuhan akan energi listrik saat ini dirasakan sangatlah penting, baik untuk kebutuhan rumahan, maupun untuk kebutuhan industri yang semakin hari semakin berkembang, sementara unit–unit pembangkit listrik yang ada hampir tidak mengalami peningkatan yang signifikan. Indonesia mempunyai potensi energi terbarukan yang cukup banyak untuk dimanfaatkan salah satunya energi air. Potensi ini belum bisa dimanfaatkan secara optimal karena keterbatasan teknologi turbin dalam memanfaatkan energinya. Untuk head dan debit yang sedang hingga tinggi saat ini masih mengandalkan turbin Pelton, Francis, Kaplan, dan Crossflow. Sedangkan untuk head yang rendah masih sulit untuk dikembangkan, padahal di Indonesia mempunyai potensi yang sangat besar. Dalam pengujian PLTPH menggunakan turbin screw didapatkan hasil tertinggi dengan tegangan 129,2 V AC dengan arus beban tertinggi hingga 0,65 sedangkan ampere generator sebesar 1,79 Ampere yang mampu digunakan untuk beban hingga 180 W pada tegangan 75,5 Volt AC pada ketinggian air 80 Cm, dan pada keadaan tegangan terendah menghasilkan 80,6 Volt AC dengan ampere beban 0,15 dan Ampere generator sebesar 0,42 Ampere yang dapat dibebani dengan lampu 20 Watt pada ketinggian air 70 Cm.
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Zheng, Ningshang, Lei Hu, and Fang Han. "Numerical study of a novel double-wall cooling structure with different cross-mass flow intensities." Journal of Physics: Conference Series 3033, no. 1 (2025): 012015. https://doi.org/10.1088/1742-6596/3033/1/012015.
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Abstract Double-wall transpiration cooling (DWTC) represents a sophisticated cooling technology in contemporary aircraft engines; nevertheless, its internal cooling has encountered challenges such as crossflow effects. This paper proposes a new turbine blade cooling system with a bionic base, and conducts a comparative analysis using ANSYS Fluent software for traditional base-less schemes, as well as bionic base double-wall cooling schemes with in-line arrangements. A detailed comparison is made of the overall cooling performance and internal heat transfer characteristics of the new double-wall cooling system under different crossflow mass flow ratios (CMFR = 0, 0.1, and 0.25) and impact jet Reynolds numbers (Re i = 12500, 18750, and 25000). The findings of this study indicate that both the crossflow effects and the presence of biomimetic bases have a significant influence on the film performance. In the range of crossflow mass flow ratios from 0 to 0.25, different designs exhibit a similar trend: as the crossflow intensity increases, the Nu increases, primarily due to the increased film coverage enhancing heat exchange on the impingement cooling walls, leading to improved film cooling efficiency. Furthermore, the new cooling structure with biomimetic bases shows a noticeable reduction in drag effects from strong crossflow at high Re i and CMFR, resulting in lower pressure loss, with film cooling efficiency improving by 8%.
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Ekkad, S. V., G. Pamula, and S. Acharya. "Influence of Crossflow-Induced Swirl and Impingement on Heat Transfer in an Internal Coolant Passage of a Turbine Airfoil." Journal of Heat Transfer 122, no. 3 (2000): 587–97. http://dx.doi.org/10.1115/1.1289020.
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Detailed heat transfer distributions are presented inside a two-pass coolant channel with crossflow-induced swirl and impingement. The impingement and passage crossflow are generated from one coolant passage to the adjoining coolant passage through a series of straight or angled holes along the dividing wall. The holes provide for the flow turning from one passage to another typically achieved in a conventional design by a 180-deg U-bend. The holes direct the flow laterally from one passage to another and generate different secondary flow patterns in the second pass. These secondary flows produce impingement and swirl and lead to higher heat transfer enhancement. Three different lateral hole configurations are tested for three Reynolds numbers (Re=10,000, 25,000, 50,000). The configurations were varied by angle of delivery and location on the divider wall. A transient liquid crystal technique is used to measure the detailed heat transfer coefficient distributions inside the passages. Results with the new crossflow feed system are compared with the results from the traditional 180-deg turn passage. Results show that the crossflow feed configurations produce significantly higher Nusselt numbers on the second pass walls without affecting the first pass heat transfer levels. The heat transfer enhancement is as high as seven to eight times greater than obtained in the second pass for a channel with a 180-deg turn. The increased measured pressure drop (rise in friction factor) caused by flow through the crossflow holes are compensated by the significant heat transfer enhancement obtained by the new configuration. [S0022-1481(00)03103-0]
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Choi, Myeung Hwan, Jeongwoo An, and Jaye Koo. "Breakup Mechanism of a Jet in the L-Shape Crossflow of a Gas Turbine Combustor." Energies 15, no. 9 (2022): 3360. http://dx.doi.org/10.3390/en15093360.
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Experimental investigations are conducted to determine the mechanism and characteristics of a jet in an L-shape crossflow simulating the radial swirl injector of a lean premixed-prevaporized (LPP) combustor. To simplify the radial flow of the actual injector while ignoring the centrifugal effect, the L-shaped 2D-channel is used for the crossflow, and water is used as a fuel simulant. The jet breakup is captured using a high-speed camera, and the density gradient magnitude is post-processed to clarify the spray. The Sauter mean diameter (SMD) of the spray is measured via a laser diffraction method with a helium–neon laser optical system (HELOS). The characteristics of the jet in the L-shape crossflow are compared with the characteristics of the jet in a typical crossflow through the flat channel. The results for different outlet heights of the L-shape channel (H/d0) and different injector positions (L/d0) are presented. A dimensionless number (τ) consisting of a time ratio is introduced to describe the jet characteristics. In a previous work, the spraying tendency was demonstrated for different injector positions. In addition, the effect of the recirculation area on H/d0 was empirically shown. H/d0 determines the size of the recirculation area, and the range of τ determines the jet breakup mechanism inside the L-shape channel. The results of this study present the breakup mechanism of the jet in the L-shape channel flow, which simulates a jet in a radial swirler injector for gas turbine engines. It is expected that these results can be used to assist in designing gas turbine engines with more combustion efficiency.
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Anand, R. S., C. P. Jawahar, Evangelos Bellos, and Anders Malmquist. "A comprehensive review on Crossflow turbine for hydropower applications." Ocean Engineering 240 (November 2021): 110015. http://dx.doi.org/10.1016/j.oceaneng.2021.110015.
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Anand, R. S., C. P. Jawahar, Evangelos Bellos, and Anders Malmquist. "A comprehensive review on Crossflow turbine for hydropower applications." Ocean Engineering 240 (November 2021): 110015. http://dx.doi.org/10.1016/j.oceaneng.2021.110015.
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Gunadi, Gun Gun R., Ahmad Indra Siswantara, and Budiarso Budiarso. "Turbulence Models Application in Air Flow of Crossflow Turbine." International Journal of Technology 9, no. 7 (2018): 1490. http://dx.doi.org/10.14716/ijtech.v9i7.2636.
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Krisna Raharja, I. Gede Agus, Cokorde Gede Indra Partha, and I. Gusti Ngurah Janardana. "ANALISIS POTENSI DAYA LISTRIK PADA PLTMH ALIRAN ANAK SUNGAI TUKAD SUNGI MENGGUNAKAN TURBIN CROSSFLOW." Jurnal SPEKTRUM 11, no. 4 (2024): 48. https://doi.org/10.24843/spektrum.2024.v11.i04.p6.
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This study evaluates the potential electrical power and turbine rotation speed generated from the flow of the Tukad Sungi tributary to be used in a Microhydro Power Plant (PLTMH) usinga crossflow turbine. This study calculates the potential electrical power that can be generated andassesses the performance of the turbine rotation speed in producing optimal power. Quantitativedata were obtained by measuring water discharge and turbine rotation speed under various loadconditions. The results showed that from the potential water discharge of 0.44 m³/s, only 0.026m³/s was used, producing a hydraulic power of 484.12 watts and a generator output power of313.227 watts. The turbine rotation showed a decrease when connected to the generator, whichaffected the overall electrical output of the system. Although the electrical power output wasachieved, the efficiency of the system still needs to be improved to meet the planned street lightingenergy needs.
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Gritsch, Michael, Achmed Schulz, and Sigmar Wittig. "Effect of Internal Coolant Crossflow on the Effectiveness of Shaped Film-Cooling Holes." Journal of Turbomachinery 125, no. 3 (2003): 547–54. http://dx.doi.org/10.1115/1.1580523.
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Film-cooling was the subject of numerous studies during the past decades. However, the effect of flow conditions on the entry side of the film-cooling hole on film-cooling performance has surprisingly not received much attention. A stagnant plenum which is widely used in experimental and numerical studies to feed the holes is not necessarily a right means to re-present real engine conditions. For this reason, the present paper reports on an experimental study investigating the effect of a coolant crossflow feeding the holes that is oriented perpendicular to the hot gas flow direction to model a flow situation that is, for instance, of common use in modern turbine blades’ cooling schemes. A comprehensive set of experiments was performed to evaluate the effect of perpendicular coolant supply direction on film-cooling effectiveness over a wide range of blowing ratios (M=0.5…2.0) and coolant crossflow Mach numbers Mac=0…0.6. The coolant-to-hot gas density ratio, however, was kept constant at 1.85 which can be assumed to be representative for typical gas turbine applications. Three different hole geometries, including a cylindrical hole as well as two holes with expanded exits, were considered. Particularly, two-dimensional distributions of local film-cooling effectiveness acquired by means of an infrared camera system were used to give detailed insight into the governing flow phenomena. The results of the present investigation show that there is a profound effect of how the coolant is supplied to the hole on the film-cooling performance in the near hole region. Therefore, crossflow at the hole entry side has be taken into account when modeling film-cooling schemes of turbine bladings.
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Satrio, Dendy, Andreas Anthoni Wiyanto, and Mukhtasor M. "IN-SITU EXPERIMENT OF CROSS-FLOW SAVONIUS HYDROKINETIC TURBINE WITH A DEFLECTOR." Journal of Marine-Earth Science and Technology 3, no. 1 (2022): 1–4. http://dx.doi.org/10.12962/j27745449.v3i1.438.
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The crossflow type Savonius turbine is capable to rotate at low current velocity conditions. The drawback of this turbine lies on its efficiency. This study aims to test its performance before implementation in the field. The research method used is an in-situ experimental study in Umbulan, Pasuruan. Turbine model T1 AR 1.145 without deflector is used, when TSR reaches a value of 0.824, it gets a CQ value of 0.327 and a CP value of 0.269. In the same model with deflector, when TSR reaches a value of 1.1, the CQ value is 0.251, and the CP value is 0.276. It can be concluded that this turbine is suitable for area with low current velocity.