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Journal articles on the topic 'Thermal enhancemen'

Author: Grafiati

Published: 5 June 2025

Last updated: 15 July 2025

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1

Sameer, Y. Bhosale, and R. Selokar G. "Assessment of Thermal Performance of Non-Conventional Grooved Stepped Shoe Ribs by CFD Technique." International Journal of Engineering and Advanced Technology (IJEAT) 9, no. 2 (2019): 75–82. https://doi.org/10.35940/ijeat.B3419.129219.

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In improvement of the thermal performance there is necessity of the heat transfer augmentation. Heat transfer enhancement can be achieved with enlarged or extended surface, impeded boundary level, augmentation in the turbulence etc. It is desired to keep the size of heat exchanger compact for better working conditions. In the proposed work, we made the Computational Fluid Dynamics (CFD) analysis of the non-conventional type of ribs. In this work the non-conventional Stepped grooved shoe shaped ribs were studied by changing its geometry parameters like rib height (15, 20,22mm), thickness of the

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NAWALE, Prashant R., Atharva A. MULE, Sudesh B. POWAR, and Pramod P. KOTHMIRE. "Enhancement technique of heat transfer using inserted twisted tape." Journal of Thermal Engineering 7, no. 7 (2021): 1614–27. http://dx.doi.org/10.18186/thermal.1025902.

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ÇELIK, Hamdi Selçuk, and L. Berrin ERBAY. "Heat transfer enhancement using different types of turbulators on the heat exchangers." Journal of Thermal Engineering 7, no. 7 (2021): 1654–70. http://dx.doi.org/10.18186/thermal.1025921.

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4

Lotfizadeh, Saba, and Themis Matsoukas. "Effect of Nanostructure on Thermal Conductivity of Nanofluids." Journal of Nanomaterials 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/697596.

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The presence of colloidal particles is known to increase the thermal conductivity of base fluids. The shape and structure of the solid particles are important in determining the magnitude of enhancement. Spherical particles—the only shape for which analytic theories exist—produce the smallest enhancement. Nonspherical shapes, including clusters formed by colloidal aggregation, provide substantially higher enhancements. We conduct a numerical study of the thermal conductivity of nonspherical structures dispersed in a liquid at fixed volume fraction in order to identify structural features that

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Soumadeep, Chatterjee, and Banerjee Soubhonik. "Graphical Analysis of Heat Transfer Enhancement Techniques Thermal Performance Factor." Research and Applications of Thermal Engineering 3, no. 3 (2021): 1–10. https://doi.org/10.5281/zenodo.4433453.

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<em>Heat transfer enhancements are of several types and have the potential to reduce the size of the equipment. Several researchers have continued studying about this topic and made significant improvements in this field. These innovations have reduced cost and size of devices over time. Many devices are becoming affordable and efficient because of such studies. Hence the Heat Transfer Enhancement techniques are really an important factor in technology. Now an essential parameter in this heat transfer enhancement field is the thermal performance factor, which decides the transfer of heat rate

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Oster, Kamil, Christopher Hardacre, Johan Jacquemin, Ana P. C. Ribeiro, and Abdulaziz Elsinawi. "Thermal Conductivity Enhancement Phenomena in Ionic Liquid-Based Nanofluids (Ionanofluids)." Australian Journal of Chemistry 72, no. 2 (2019): 21. http://dx.doi.org/10.1071/ch18116.

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The dispersion of nanoparticles into ionic liquids leads to enhancement of their thermal conductivity. Several papers report on various enhancement values, whereas the comparison between these values with those from theoretical calculations is not always performed. These thermal conductivity enhancements are desired due to their beneficial impact on heat transfer performance in processes requiring the utilisation of heat transfer fluids. Moreover, on the one hand, the theoretical modelling of these enhancements might lead to an easier, cheaper, and faster heat transfer unit design, which could

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M.V, Bindu, and Herbert Joselin. "Enhancement of Thermal Performance of Solar Parabolic Trough Concentrator-Techniques- Review." Bonfring International Journal of Industrial Engineering and Management Science 9, no. 3 (2019): 16–20. http://dx.doi.org/10.9756/bijiems.9033.

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8

Ramakrishna, K., and T. Y. Tom Lee. "Evaluation of Thermal Enhancements to Flip-Chip-Plastic Ball Grid Array Packages." Journal of Electronic Packaging 126, no. 4 (2004): 449–56. http://dx.doi.org/10.1115/1.1827260.

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Enhancements to thermal performance of FC-PBGA packages due to underfill thermal conductivity, controlled collapse chip connection (C4) pitch, package to printed wiring board (PWB) interconnection through thermal balls, a heat spreader on the backside of the die, and an overmolded die with and without a heat spreader have been studied by solving a conjugate heat transfer problem. These enhancements have been investigated under natural and forced convection conditions for freestream velocities up to 2 m/s. The following ranges of parameters have been covered in this study: substrate size: 25–35

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GÖKSU, Taha Tuna, and Fuat YILMAZ. "Numerical comparison study on heat transfer enhancement of different cross-section wire coils insert with varying pitches in a duct." Journal of Thermal Engineering 7, no. 7 (2021): 1683–93. http://dx.doi.org/10.18186/thermal.1025930.

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10

Seyed Abbas, Radmard, Alizadeh Hossein Haji Agha, and Seifi Rahman. "Enhancement anaerobic digestion and methane production from kitchen waste by thermal and thermo-chemical pretreatments in batch leach bed reactor with down flow." Research in Agricultural Engineering 64, No. 3 (2018): 128–35. http://dx.doi.org/10.17221/16/2017-rae.

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The effects of thermal (autoclave and microwave irradiation (MW)) and thermo-chemical (autoclave and microwave irradiation – assisted NaOH 5N) pretreatments on the chemical oxygen demand (COD) solubilisation, biogas and methane production of anaerobic digestion kitchen waste (KW) were investigated in this study. The modified Gompertz equation was fitted to accurately assess and compare the biogas and methane production from KW under the different pretreatment conditions and to attain representative simulations and predictions. In present study, COD solubilisation was demonstrated as an effecti

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11

Pavlovic, Sasa, Evangelos Bellos, Velimir Stefanovic, Milan Djordjevic, and Darko Vasiljevic. "Thermal and exergetic investigation of a solar dish collector operating with mono and hybrid nanofluids." Thermal Science 22, Suppl. 5 (2018): 1383–93. http://dx.doi.org/10.2298/tsci18s5383p.

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The use of solar dish thermal collectors is a promising choice for designing sustainable energy systems. The use of nanofluids is a new way for enhancing the thermal performance of solar collectors because of their improved thermal properties. The objective of this study is to investigate the use of mono and hybrid nanofluids in a solar dish collector in order to determine which kind of nanofluids leads to higher performance enhancements. The analysis is conducted with a developed thermal model in Engineering Equation Solver and the collector is studied thermally and exergetically. The examine

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12

Sudha, Brahma Naidu P., and S. Kishore P. "HEAT TRANSFER ENHANCEMENT USING CIRCUMFERENTIAL FINNED TWISTED TAPE HEAT EXCHANGER." International Journal of Research - Granthaalayah 5, no. 9 (2017): 152–63. https://doi.org/10.5281/zenodo.1002142.

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The most desirable feature in any thermal equipment is the enhancement of heat transfer. Heat transfer is basically a slow process and is enhanced by adopting passive or active methods of enhancement. In passive enhancement methods, heat transfer is increased without demanding any external power source; while in active method, enhancement in heat transfer demand external power. In this work, a passive enhancement method is proposed and tested to check the extent of heat transfer enhancement noticed. A tube in shell heat exchanger is designed with circumferential fins attached along the length

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13

GUO, Chaxiu, Xinli WEI, Dingbao WANG, and Hong LIU. "C103 PERFORMANCE ENHANCEMENT OF A LATENT HEAT THERMAL STORAGE FOR SOLAR THERMAL POWER PLANT(Solar, Wind and Wave Energy-1)." Proceedings of the International Conference on Power Engineering (ICOPE) 2009.1 (2009): _1–145_—_1–150_. http://dx.doi.org/10.1299/jsmeicope.2009.1._1-145_.

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14

Shachar Michaely, Gal, Dimitry Alhazov, Michael Genkin, Matat Buzaglo, and Oren Regev. "Disperse-and-Mix: Oil as an ‘Entrance Door’ of Carbon-Based Fillers to Rubber Composites." Nanomaterials 11, no. 11 (2021): 3048. http://dx.doi.org/10.3390/nano11113048.

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Oil was employed as an ‘entrance door’ for loading rubber with carbon-based fillers of different size and dimensionalities: 1D carbon nanotubes (CNTs), 2D graphene nanoplatelets (GNPs), and 3D graphite. This approach was explored, as a proof of concept, in the preparation of tire tread, where oil is commonly used to reduce the viscosity of the composite mixture. Rubber was loaded with carbon black (CB, always used) and one or more of the above fillers to enhance the thermal and mechanical properties of the composite. The CNT-loaded system showed the best enhancement in mechanical properties, f

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15

Yasmin, Humaira, Solomon O. Giwa, Saima Noor, and Mohsen Sharifpur. "Thermal Conductivity Enhancement of Metal Oxide Nanofluids: A Critical Review." Nanomaterials 13, no. 3 (2023): 597. http://dx.doi.org/10.3390/nano13030597.

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Advancements in technology related to energy systems, such as heat exchangers, electronics, and batteries, are associated with the generation of high heat fluxes which requires appropriate thermal management. Presently, conventional thermal fluids have found limited application owing to low thermal conductivity (TC). The need for more efficient fluids has become apparent leading to the development of nanofluids as advanced thermal fluids. Nanofluid synthesis by suspending nano-size materials into conventional thermal fluids to improve thermal properties has been extensively studied. TC is a pi

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Lee, In-Ho, Won-Yeung Chung, and Chan-Gook Park. "Super-resolution Thermal Generative Adversarial Networks for Infrared Image Enhancement." Journal of Institute of Control, Robotics and Systems 28, no. 2 (2022): 153–60. http://dx.doi.org/10.5302/j.icros.2022.21.0228.

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17

Naidu P., Sudha Brahma, and P. S. Kishore. "HEAT TRANSFER ENHANCEMENT USING CIRCUMFERENTIAL FINNED TWISTED TAPE HEAT EXCHANGER." International Journal of Research -GRANTHAALAYAH 5, no. 9 (2017): 152–63. http://dx.doi.org/10.29121/granthaalayah.v5.i9.2017.2225.

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The most desirable feature in any thermal equipment is the enhancement of heat transfer. Heat transfer is basically a slow process and is enhanced by adopting passive or active methods of enhancement. In passive enhancement methods, heat transfer is increased without demanding any external power source; while in active method, enhancement in heat transfer demand external power. In this work, a passive enhancement method is proposed and tested to check the extent of heat transfer enhancement noticed. A tube in shell heat exchanger is designed with circumferential fins attached along the length

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18

Andrikaki, S., K. Govatsi, S.N. Yannopoulos, G.A. Voyiatzis, and K.S. Andrikopoulos. "Thermal dewetting tunes surface enhanced resonance Raman scattering (SERRS) performance." RSC Advances 8, no. 51 (2019): 29062–70. https://doi.org/10.1039/c8ra05451g.

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Surface Enhanced Raman Spectroscopy (SERS) belongs to the techniques of ultra-sensitive chemical analysis and involves both identification and quantification of molecular species. Despite the fact that theoretically derived enhancement factors imply that even single molecules may be identified, which in some cases has indeed been experimentally observed, the application of this specific technique as an analytical tool is still an open field of research due to the need for reproducible, stable and simple to prepare SERS active substrates. The current work attempts to contribute to the already e

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19

Sathe, S., and B. Sammakia. "A Review of Recent Developments in Some Practical Aspects of Air-Cooled Electronic Packages." Journal of Heat Transfer 120, no. 4 (1998): 830–39. http://dx.doi.org/10.1115/1.2825902.

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The recent emphasis on low-cost high-end servers and desktop workstations has resulted in a renewed interest in the development of high-performance air-cooled systems. A new generation of advanced heat sink designs capable of dissipating up to 105 W/m2 have been proposed and developed. Better manufacturing tolerances, lower defects, and an improved understanding of card and enclosure effects have been attained and shown to be critical to achieving the desired thermal performance. Advanced internal thermal enhancements, encompassing high thermal conductivity adhesives and greases have also been

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20

Muhammad Syafiq Idris, Irnie Azlin Zakaria, Wan Azmi Wan Hamzah, and Wan Ahmad Najmi Wan Mohamed. "The Characteristics of Hybrid Al2O3:SiO2 Nanofluids in Cooling Plate of PEMFC." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 88, no. 3 (2021): 96–109. http://dx.doi.org/10.37934/arfmts.88.3.96109.

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A Proton Electrolyte Membrane fuel cells (PEMFC) is considered to be a viable alternatives to Internal Combustion Engines (ICEs) in automotive applications due to the key advantages in thermal management system. The main duty of thermal management system is to maintain the desirable temperature, with a uniform temperature distribution across the stack and.its.individual membranes. In this paper, the thermal enhancement of a PEMFC cooling plate was analysed and presented. The hybrid Al₂O₃:SiO₂ was used as coolant in distributor cooling plate. The study focuses on water based 0.5% volume concent

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21

Tian, Weixin, Junrui Chai, and Jing Cao. "Cement-based composites modified by graphene oxide nano-materials: porosity and thermal conductivity." Journal of Physics: Conference Series 2553, no. 1 (2023): 012003. http://dx.doi.org/10.1088/1742-6596/2553/1/012003.

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Abstract This study looked into the way graphene oxide (GO) affects the porosity and thermal conductivity of composite materials fabricated from cement. Different concentrations ascribed to GO at 0.02%, 0.05, 0.07, and 0.1% were added to the cement samples (as per cement mass). The porosity showed a trend of first decreasing and then increasing, with the decrease in macroporosity being particularly pronounced. The porosity and thermal conductivity of GO-cement composites were measured. The findings demonstrated by incorporating GO, the thermal conductivity of GO-cement composites was firstly b

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22

Pan, Yi. "Enhanced Thermoelectric Performance in Ca-doped AgSbTe2." Academic Journal of Science and Technology 10, no. 1 (2024): 415–19. http://dx.doi.org/10.54097/35sqr584.

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Thermoelectric materials play a crucial role in applications such as recovering waste heat and refrigeration. We report a thermoelectric figure of merit (zT) of 1.17 at 623 K for AgSb1-xCaxTe2, representing a 31% enhancement compared to pristine AgSbTe2. The improved thermoelectric performance arises from enhancements in both the power factor and lattice thermal conductivity. Dopant substitution of element Ca at the Sb site in AgSbTe2 suppresses the formation of Ag2Te and increases the concentration of p-type charge carriers, leading to enhanced electrical transport properties. Additionally, C

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23

Hazim, Sinan Mazin. "Numerical Study of Performance and Reliability Enhancement of Regenerative Air Preheater for Thermal Power Plant." Journal of Advanced Research in Dynamical and Control Systems 12, no. 3 (2020): 353–64. http://dx.doi.org/10.5373/jardcs/v12i3/20201201.

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24

Qin, Jun, Yuequn Tao, Qiusheng Liu, Zilong Li, Zhiqiang Zhu, and Naifeng He. "Experimental and Theoretical Studies of Different Parameters on the Thermal Conductivity of Nanofluids." Micromachines 14, no. 5 (2023): 964. http://dx.doi.org/10.3390/mi14050964.

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This work experimentally investigated the effects of different factors, including nanoparticle size and type, volume fraction, and base fluid, on the thermal conductivity enhancement of nanofluids. The experimental results indicate that the thermal conductivity enhancement of nanofluids is proportional to the thermal conductivity of the nanoparticles, with the enhancement being more pronounced for fluids with lower thermal conductivity. Meanwhile, the thermal conductivity of nanofluids decreases with increasing particle size and increases with increasing volume fraction. In addition, elongated

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Sukarman, Sukarman, Budi Kristiawan, Eko Prasetya Budiana, Khoirudin Khoirudin, and Amri Abdulah. "Enhancing Thermal Conductivity of TiO2-3%F+/MEG-40 Binary Nanofluid for Sustainable Cooling Systems in Plastic Injection Molding Applications." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 128, no. 2 (2025): 177–87. https://doi.org/10.37934/arfmts.128.2.177187.

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This study explores thermal conductivity enhancement in nanofluids for high-temperature applications (70–120°C), specifically targeting plastic injection molding. The research investigates two formulations: TiO2-3%/MEG-40 nanofluid, containing 3 vol% TiO2 nanoparticles, and TiO2-3%F8/MEG-40 binary nanofluid, comprising TiO2 rutile and SiO2 beta-quartz composite nanoparticles in a 92:8 ratio with a total volume fraction of 3 vol%. Both nanofluids were synthesized using the two-step method, with grain size confirmed via scanning and transmission electron microscopy. Thermal conductivity was meas

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Nilsson, H., S. Kirkwood, J. Lilensten, and M. Galand. "Enhanced incoherent scatter plasma lines." Annales Geophysicae 14, no. 12 (1996): 1462–72. http://dx.doi.org/10.1007/s00585-996-1462-z.

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Abstract. Detailed model calculations of auroral secondary and photoelectron distributions for varying conditions have been used to calculate the theoretical enhancement of incoherent scatter plasma lines. These calculations are compared with EISCAT UHF radar measurements of enhanced plasma lines from both the E and F regions, and published EISCAT VHF radar measurements. The agreement between the calculated and observed plasma line enhancements is good. The enhancement from the superthermal distribution can explain even the very strong enhancements observed in the auroral E region during auror

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Ozturk, Serdar, and Keagan Schmidt. "Characterization of HFE 7500 Refrigerant Suspensions Containing Oxide and Nitride Nanoparticles: Thermal, Rheological, and Electrokinetic Insights." ChemEngineering 9, no. 4 (2025): 65. https://doi.org/10.3390/chemengineering9040065.

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Nanofluids—engineered suspensions of nanometer-sized particles—have attracted significant attention due to their reportedly enhanced thermal properties, making them promising candidates for advanced heat transfer applications. However, despite extensive studies, uncertainties remain regarding the magnitude and origin of these effects, limiting their practical implementation. To address this, we present a comprehensive study on nanofluid formulations based on the commercial refrigerant HFE-7500, incorporating surfactant-stabilized dispersions of several metal oxide and nitride nanoparticles. We

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Xu, Mingzhen, Yangxue Lei, Dengxun Ren, Sijing Chen, Lin Chen, and Xiaobo Liu. "Synergistic Effects of Functional CNTs and h-BN on Enhanced Thermal Conductivity of Epoxy/Cyanate Matrix Composites." Nanomaterials 8, no. 12 (2018): 997. http://dx.doi.org/10.3390/nano8120997.

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Epoxy/cyanate resin matrix composites (AG80/CE) with improved thermal conductivity and mechanical properties were obtained with synergetic enhancement with functional carbon nanotubes (f-CNTs) and hexagonal boron nitride (h-BN). AG80/CE performed as polymeric matrix and h-BN as conductivity filler which formed the main thermal conductivity channels. Small amounts of f-CNTs were introduced to repair defects in conductivity channels and networks. To confirm the synergetic enhancements, the thermal conductivity was investigated and analyzed with Agari’s model. Results indicated that with introduc

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Koruk, Merve, Alpaslan Turgut, and Abdulkareem Alasli. "Evaluating the Thermal Conductivity and Viscosity of CuO-Nanolubricants." Key Engineering Materials 750 (August 2017): 159–63. http://dx.doi.org/10.4028/www.scientific.net/kem.750.159.

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In the presented work, thermal conductivity of CuO and its viscosity at three different weight concentrations were investigated. A two-steps method was deployed in order to sonicate successfully CuO nanolubricants samples at three different weight concentrations (0.2 wt%, 0.5 wt%, & 1 wt%). The measurements of thermal conductivity were carried out with a lab-made measurement set, which is based on a 3ω method. The obtained enhancements were 1%, 1.7% and 2.8% for 0.2 wt.%, 0.5 wt.%, and 1 wt.%, respectively. Viscosity was also investigated under different temperatures and it was obtained th

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Zhao, Yumeng, Wenqing Wang, Jiquan Wang, et al. "Enhancing Thermal Conductivity of SiC Matrix Pellets for Accident-Tolerant Fuel via Atomic Layer Deposition of Al2O3 Coating." Energies 18, no. 8 (2025): 2130. https://doi.org/10.3390/en18082130.

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This study investigates the enhancement of thermal conductivity in silicon carbide (SiC) matrix pellets for accident-tolerant fuels via atomic layer deposition (ALD) of alumina (Al2O3) coatings. Pressure-holding ALD protocols ensured precursor saturation, enabling precise coating control (0.09 nm/cycle). The ALD-coated Al2O3 layers on SiC particles were found to be more uniform while minimizing surface oxidation compared to traditional mechanical mixing. Combined with yttria (Y2O3) additives and spark plasma sintering (SPS), ALD-coated samples achieved satisfactory densification and thermal pe

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Ekeberg, J., G. Wannberg, L. Eliasson, and K. Stasiewicz. "Ion-acoustic solitary waves and spectrally uniform scattering cross section enhancements." Annales Geophysicae 28, no. 6 (2010): 1299–306. http://dx.doi.org/10.5194/angeo-28-1299-2010.

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Abstract. Spectra measured by incoherent scatter radars are formed predominantly by scattering of the incident signal off ion-acoustic and Langmuir waves in the ionosphere. Occasionally, the upshifted and/or downshifted lines produced by the ion-acoustic waves are enhanced well above thermal levels and referred to as naturally enhanced ion-acoustic lines. In this paper, we study another kind of enhancement, which is spectrally uniform over the whole ion-line, i.e. the up- and downshifted shoulder and the spectral valley in between. Based on observations made with the EISCAT Svalbard radar (ESR

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Morrison, Hugh, John M. Peters, Adam C. Varble, Walter M. Hannah, and Scott E. Giangrande. "Thermal Chains and Entrainment in Cumulus Updrafts. Part I: Theoretical Description." Journal of the Atmospheric Sciences 77, no. 11 (2020): 3637–60. http://dx.doi.org/10.1175/jas-d-19-0243.1.

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AbstractRecent studies have shown that cumulus updrafts often consist of a succession of discrete rising thermals with spherical vortex-like circulations. In this paper, a theory is developed for why this “thermal chain” structure occurs. Theoretical expressions are obtained for a passive tracer, buoyancy, and vertical velocity in axisymmetric moist updrafts. Analysis of these expressions suggests that the thermal chain structure arises from enhanced lateral mixing associated with intrusions of dry environmental air below an updraft’s vertical velocity maximum. This dry-air entrainment reduces

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Tofani, Kassianne, and Saeed Tiari. "Nano-Enhanced Phase Change Materials in Latent Heat Thermal Energy Storage Systems: A Review." Energies 14, no. 13 (2021): 3821. http://dx.doi.org/10.3390/en14133821.

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Latent heat thermal energy storage systems (LHTES) are useful for solar energy storage and many other applications, but there is an issue with phase change materials (PCMs) having low thermal conductivity. This can be enhanced with fins, metal foam, heat pipes, multiple PCMs, and nanoparticles (NPs). This paper reviews nano-enhanced PCM (NePCM) alone and with additional enhancements. Low, middle, and high temperature PCM are classified, and the achievements and limitations of works are assessed. The review is categorized based upon enhancements: solely NPs, NPs and fins, NPs and heat pipes, NP

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Le Ba, Thong, Ahmed Qani Alkurdi, István Endre Lukács, et al. "A Novel Experimental Study on the Rheological Properties and Thermal Conductivity of Halloysite Nanofluids." Nanomaterials 10, no. 9 (2020): 1834. http://dx.doi.org/10.3390/nano10091834.

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Nanofluids obtained from halloysite and de-ionized water (DI) were prepared by using surfactants and changing pH for heat-transfer applications. The halloysite nanotubes (HNTs) nanofluids were studied for several volume fractions (0.5, 1.0, and 1.5 vol%) and temperatures (20, 30, 40, 50, and 60 °C). The properties of HNTs were studied with a scanning electron microscope (SEM), energy-dispersive X-ray analysis (EDX), Fourier-transform infrared (FT-IR) spectroscopy, X-ray powder diffraction (XRD), Raman spectroscopy and thermogravimetry/differential thermal analysis (TG/DTA). The stability of th

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Bhatt, Gaurang R., Avik Dutt, Steven A. Miller, et al. "Broadband enhancement of thermal radiation." Optics Express 27, no. 12 (2019): A818. http://dx.doi.org/10.1364/oe.27.00a818.

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Yehia, Mohamed H., Muhammed A. Hassan, Nabeel Abed, Adel Khalil, and Nadjem Bailek. "Combined Thermal Performance Enhancement of Parabolic Trough Collectors Using Alumina Nanoparticles and Internal Fins." International Journal of Engineering Research in Africa 62 (November 23, 2022): 107–32. http://dx.doi.org/10.4028/p-63cdb1.

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Parabolic trough collectors are the currently dominant technology for concentrated solar power systems, employed to produce thermal energy at low to medium temperatures (up to 400°C). Extensive research has been carried out to enhance the thermal efficiency and reduce the power production costs of these concentrators. However, there is a lack of studies on combined passive performance enhancement using alternative fluids and absorber designs. In this study, the thermal performance of a full-sized parabolic trough collector is analyzed with the presence of internal longitudinal fins in combinat

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Chamkha, Ali, and Fatih Selimefendigil. "Numerical Analysis for Thermal Performance of a Photovoltaic Thermal Solar Collector with SiO2-Water Nanofluid." Applied Sciences 8, no. 11 (2018): 2223. http://dx.doi.org/10.3390/app8112223.

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Numerical analysis of a photovoltaic-thermal (PV/T) unit with SiO 2 -water nanofluid was performed. The coupled heat conduction equations within the layers and convective heat transfer equations within the channel of the module were solved by using the finite volume method. Effects of various particle shapes, solid volume fractions, water inlet temperature, solar irradiation and wind speed on the thermal and PV efficiency of the unit were analyzed. Correlation for the efficiencies were obtained by using radial basis function neural networks. Cylindrical shape particles were found to give best

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Yaxuan, Xiong, Wang Huixiang, Wang Zhenyu, et al. "Insights into the Enhancement Mechanisms of Molten Salt Nanofluids." International Journal of Photoenergy 2022 (September 13, 2022): 1–14. http://dx.doi.org/10.1155/2022/4912922.

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The addition of nanomaterials to molten salts can significantly improve their thermal performance. To explore the enhancement mechanisms, this work prepared carbonate salt nanofluids with binary carbonate as base salt and 20 nm SiO2 and 20 nm MgO nanoparticles as additives by the commonly used aqueous solution method. Then, the key performance and micromorphology of the carbonate salt nanofluids are characterized by differential scanning calorimetry, thermal gravimetric analysis, laser flash analysis, and micromorphology analysis. Results showed that the 20 nm SiO2 nanomaterials instead of the

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Korres, Dimitrios, Evangelos Bellos, and Christos Tzivanidis. "Integration of a Linear Cavity Receiver in an Asymmetric Compound Parabolic Collector." Energies 15, no. 22 (2022): 8635. http://dx.doi.org/10.3390/en15228635.

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The objective of this work is the integration of a linear cavity receiver in an asymmetric compound parabolic collector. Two different numerical models were developed; one for the conventional geometry and one for the cavity configuration. Both models were examined for inlet temperatures from 20 °C up to 80 °C, considering water as the operating fluid with a typical volume flow rate of 15 lt/h. Emphasis was given to the comparison of the thermal and optical performance between the designs, as well as in the temperature levels of the fluids and the receiver. The geometry of the integrated cavit

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Wattananurak, Pilantana, Natthapong Monarumit, Rattanawalee Chooyoung, Krit Won-In, Sutharat Chotikaprakhan, and Somruedee Satitkune. "FWHM Calculation of Zircon Gem-Materials before and after Thermal Enhancement." Key Engineering Materials 737 (June 2017): 599–603. http://dx.doi.org/10.4028/www.scientific.net/kem.737.599.

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Zircon samples from Ubon Ratchathani, Thailand; Rattanakiri, Cambodia and Dak Nong, Vietnam change their color from light brown and reddish-brown to blue color after thermal enhancement at 1000 ๐C in reducing condition for 60 min. The high temperature is one of the factors for the zircon structure to recrystallize. The objective of this study is to describe the crystal structure of zircon samples before and after thermal enhancement. Zircon is a metamict mineral whose structure is destroyed by some trace elements. There are radioactive elements such as U and Th in the zircon structure. In this

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GHAHFAROKHİ, Narges Jafari, Morteza BAYAREH, Afshin Ahmadi NADOOSHAN, and Sara AZADİ. "MIXING ENHANCEMENT IN ELECTROOSMOTIC MICROMIXERS." Journal of Thermal Engineering, January 23, 2021, 47–57. http://dx.doi.org/10.18186/thermal.867134.

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VERMA, Abhishek, Subhash Chandra KAUSHIK, and Sudhir Kumar TYAGI1. "Performance enhancement of absorption refrigeration systems: An overview." Journal of Thermal Engineering, February 13, 2022, 1093–106. http://dx.doi.org/10.18186/thermal.1334225.

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The introduction of absorption refrigeration technology addressed several significant con-cerns in the domain of energy crisis, rising cost of fossil fuel, and ecological challenges aris-ing due to the excess use of traditional compression refrigeration systems. ARS (absorption refrigeration system) is gaining popularity as a result of benefits such as the use of low-grade heat sources and environmentally acceptable low-cost working fluid pairs. However, two sig-nificant hurdles to commercial success for this technology are the often too big size of the refrigeration system and the poor perfor

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REDJEB, Youcef, Khatima KAABECHE-DJERAFI, and Hamza SEMMARI. "Performance enhancement of absorption refrigeration systems: An overview." Journal of Thermal Engineering, January 9, 2022, 861–75. http://dx.doi.org/10.18186/thermal.1325375.

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The present work deals with the deployment of an air bottoming cycle as a technology for thermal energy valorization. This solution is integrated within the preheater tower on an Al-gerian cement plant. A combined MATLAB- Coolprop optimization tool has been developed to carry out a thermo-economic calculation allowing to design and optimize the air bottoming cycle and also check its economic returns. The developed code employs the genetic algorithm through a multi-objective function aiming to maximize the cycle’s net power output as a pri-ority objective, then minimize the heat exchanger’s are

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RAJA G., Abinicks. "Heat enhancement in solar flat plate collectors – A review." Journal of Thermal Engineering, 2024, 773–89. http://dx.doi.org/10.14744/thermal.0000811.

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PATIL, Bhushan, Jitendra HOLE, and Sagar WANKHEDE. "Performance enhancement of stepped solar still coupled with evacuated tube collector." Journal of Thermal Engineering, July 12, 2022, 1180–91. http://dx.doi.org/10.18186/thermal.1372168.

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The provision of fresh water is the most important problem in developing countries. With the rising need for fresh water, it is vital to look for other sources. Solar energy is still one of the most essential and technically feasible applications of the sun. There are numerous varieties of solar stills; the basin type is the most basic and well-proven. The biggest disadvantage of a tra-ditional basin solar still is that it produces very little distilled water per unit area. Solar distilla-tion is one of the most basic method to remove pollutants including heavy metals, dust, salts, and microor

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MISHRA, Shri Krishna. "Performance enhancement of thermal energy storage system using ZrO2 doped paraffin wax." Journal of Thermal Engineering, 2025, 79–93. https://doi.org/10.14744/thermal.0000905.

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EMAD, Mustafa, Sattar ALJABAIR, and Ahmed Abdulnabi IMRAN. "Heat transfer enhancement of electronic devices by using flexible printed circuit boards." Journal of Thermal Engineering, June 11, 2022, 1531–47. http://dx.doi.org/10.18186/thermal.1401009.

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In this paper, heat transfer in electronic equipment was studied numerically and experimentally, by investing in the flexible printed circuit board and changing the board’s orientation, which is the substrate of the electronic equipment from a vertical to a horizontal position. ANSYS Fluent software has been used to solve the continuity, momentum, and energy equations with the three-dimensional, unsteady, laminar and incompressible flow. In this study, the oscillatory motion equation was used as a boundary condition to represent the motion of the flexible board. In the experimental aspect of t

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ÇELIK, Hamdi Selçuk, and L. Berrin ERBAY. "Heat transfer enhancement using different types of turbulators on the heat exchangers." November 22, 2021. https://doi.org/10.18186/thermal.1025921.

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Energy-saving and heat transfer enhancement considerations are more crucial due to nearly running out energy resources and ensuring the sustainability of nature. The heat exchangers are one of the main components and directly affect the thermal efficiency of the systems. To enhance the heat transfer rate, the fin and plate structure is widely used. Various vortex generators may be involved generally on the surface of fins, like ribs, baffles, delta winglets, and perforations. Turbulators make the heat transfer performance better significantly but increase the friction of the fluid on the conta

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HAMADOUCHE, Ali Bousri, and Nebbali RICHARD. "Experimental analysis of heat transfer characteristics using ultrasonic acoustic waves." Journal of Thermal Engineering, June 28, 2022, 1516–30. http://dx.doi.org/10.18186/thermal.1400993.

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In this experimental work, heat transfer intensification using ultrasonic waves was investigated. A heat source, consisting in a parallelepiped aluminum block in which two electrical heating cartridges of 160 W each were mounted to heat four liters of distilled water contained in a tank made of Plexiglas. To demonstrate the effectiveness of heat transfer enhancement with the use of ultrasounds, three different configurations were analyzed. In the first one, considered as a reference case, the heat transfer was studied without ultrasound field. In the second configuration, ultrasonic acoustic w

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NAJM, Ali, Itimad D.J. AZZAWI, and Abdul Mun'em A. KARIM. "Experimental and numerical investigation of heat transfer enhancement in double coil heat exchanger." Journal of Thermal Engineering, April 6, 2022, 62–77. http://dx.doi.org/10.18186/thermal.1429153.

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In the current work, a substantial research and cost-effective strategy has been conducted to enhance the thermal efficiency of shell and coil heat exchangers, and geometrical modifica-tion is one technique to improve the exchange of thermal energy between two or more fluids. Therefore, experimental and numerical analysis across a shell and single/double coil heat ex-changer at constant temperatures of 36 °C for cold water and 65 °C for hot water are studied. Various coil pitches (baseline pitch, P-2P-P and 2P-P-2P) and mass flow rates (1 L/min for hot water and 2, 4, 6, and 8 L / min for cold

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