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Artykuły w czasopismach na temat „Heat Removal Rate”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Liu, Cheng-Wei, Shuo-Jun Mei, Di Liu, and Fu-Yun Zhao. "Convective dispersion of heat and airborne pollutants inside street canyons under the influence of urban ground heat flows." Indoor and Built Environment 28, no. 5 (2017): 619–35. http://dx.doi.org/10.1177/1420326x17706186.

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This paper reports a computational fluid dynamics simulation of airflow and species dispersion inside street canyons and building blocks simultaneously. Urban thermal boundary flows could cause a profound effect on the dispersion of pollutant scalars and ventilation performance of street canyons. Nominal pollutant concentration differences between the urban street canyon and the countryside fresh air could be determined by a consideration of wind profile and ground vegetation. This study models the interaction of the fluid flow, thermal and pollutant dispersions based on the Reynolds number (R

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Park, R., K. Ha, K. Kang, S. Kim, H. Kim, and J. Jeong. "Critical heat removal rate through a hemispherical narrow gap." Heat and Mass Transfer 39, no. 3 (2003): 249–55. http://dx.doi.org/10.1007/s00231-002-0345-4.

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Fang, Xing, and Dengke Zheng. "Study on Limit Margin of Rising and Cooling Rate in Primary Circuit of CPR1000 Unit." E3S Web of Conferences 438 (2023): 01016. http://dx.doi.org/10.1051/e3sconf/202343801016.

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The thermal conductivity of waste heat removal system of CPR1000 unit is analyzed, and the rate margin of primary circuit is studied. In this study, the design parameters of a domestic CPR1000 residual heat removal system are used to study the primary loop temperature margin according to the different core states, and the primary loop temperature margin according to the different valve openings of the residual heat removal system (RRA) . The results show that the CPR1000 unit has a large margin in cooling down, but there is no room for improvement in the process of heating up. Therefore, it is

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Gade, Bhavani Shankar, and P.S.Kishore. "PERFORMANCE ANALYSIS OF A CONVENTIONAL AIR HEATER." International Journal of Research - Granthaalayah 5, no. 4 (2017): 320–33. https://doi.org/10.5281/zenodo.573004.

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Solar energy constitutes one of the main alternatives for facing the energy problems of the future. Solar air heaters are used for applications at low and moderate temperatures. Such as crop drying, timber seasoning, space heating, and drying agriculture products. Artificial geometry applied on the absorber plate is the very efficient method to improve thermal performance of solar air heaters. The thermal efficiency of solar air heaters is generally poor due to low heat transfer coefficient between the absorber plate and air flowing in the collector. Thermal performance of the conventional sol

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5

Razeghiyadaki, Amin, Carlo Molardi, Didier Talamona, and Asma Perveen. "Modeling of Material Removal Rate and Surface Roughness Generated during Electro-Discharge Machining." Machines 7, no. 2 (2019): 47. http://dx.doi.org/10.3390/machines7020047.

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This study reports on the numerical model development for the prediction of the material removal rate and surface roughness generated during electrical discharge machining (EDM). A simplified 2D numerical heat conduction equation along with additional assumptions, such as heat effect from previously generated crater on a subsequent crater and instantaneous evaporation of the workpiece, are considered. For the material removal rate, an axisymmetric rectangular domain was utilized, while for the surface roughness, a rectangular domain where every discharge resides at the end of previous crater w

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6

Weng, Meng-Chia, Chiou-Liang Lin, and Cheng-Hsi Lee. "Effect of Heat-Treatment Remediation on the Mechanical Behavior of Oil-Contaminated Soil." Applied Sciences 10, no. 9 (2020): 3174. http://dx.doi.org/10.3390/app10093174.

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The heat treatment of oil-contaminated sites is widely carried out for the purposes of remediation. However, heat treatment changes the physical and chemical properties of soil. Before the soil can be reused as a construction material in civil engineering, such as in backfill or road base materials, the changes to its physical properties must be understood. Therefore, this study investigates the changes in the physical and chemical properties of oil-contaminated soil after heat treatment. In this investigation, experimental samples of soil with added oil from a refinery plant are used to inves

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Kharisma, Sunandi, Dwi Yuliaji, Adhika Enggar Pamungkas, et al. "Impact of Cooler Temperature Variations on Flow Boiling Phenomena in a Natural Circulation Rectangular Loop." Journal of Physics: Conference Series 2972, no. 1 (2025): 012020. https://doi.org/10.1088/1742-6596/2972/1/012020.

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Abstract The passive cooling system that utilizes natural circulation is effective in removing decay heat from nuclear reactors, with the direct passive residual heat removal system being the most efficient. This study employs the Rectangular-TP FASSIP-04 Ver.2 Loop with a direct heating model to investigate two-phase natural circulation flow. The coolant water temperature is set at 10°C, 15°C, and 20°C with a constant heating power of 5600 watts, to measure temperature characteristics, flow rate, flow regimes, and heat removal rate. The results show that higher coolant temperatures accelerate

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8

Tao, Jiaqi, Hanyang Gu, Zhenqin Xiong, Xing Jiang, and Yongcheng Xie. "Parametric analysis of heat transfer rate of passive residual heat removal heat exchanger submerged in water tank." Experimental Thermal and Fluid Science 98 (November 2018): 317–27. http://dx.doi.org/10.1016/j.expthermflusci.2018.05.027.

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Kaskov, S. I. "Calculation and Experimental Study of Heat Exchange in a System of Plane-Parallel Channels with Surface Intensifiers." Nelineinaya Dinamika 17, no. 2 (2021): 211–20. http://dx.doi.org/10.20537/nd210206.

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This paper presents the results of numerical investigation, calculation analysis and experimental study of heat exchange in a system of plane-parallel channels formed by rectangular fins, which are applied in a heat removal device using heat tubes for power semiconductor energy converters. Passive cooling (heat removal by radiation and natural convection) and active cooling (heat removal by radiation and forced convection) are investigated for various velocities of air cooling of fins by spherical vortex generators applied to its surface. A comparative analysis of the results is carried out fo

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10

Mahdy, Hussain H., Abdulsalam D. M. Hassen, and Mohammed Ghalib Al-Azawy. "Investigating the impact of flow rate and moisture content for different concentration of liquid desiccant solution." Wasit Journal of Engineering Sciences 11, no. 1 (2023): 75–83. http://dx.doi.org/10.31185/ejuow.vol11.iss1.346.

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The desiccant air conditioning system consists of two processes, namely cooling and dehumidification, in which the air temperature and humidity are controlled in order to provide comfortable thermal conditions. A typical system includes a dehumidifier, indirect evaporative cooler, and regenerator. The desiccant is selected depending on its ability to absorb water vapor present in the air. In this study, calcium chloride solution was used as a desiccant for the desiccant solution regeneration process, and a flat plate solar collector was employed. Different variables, such as the primary air fl

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11

Liang, Shun Xing, Jin Cheng Wang, and Lai Chang Zhang. "Heat-Activated Persulfate by Fe-Based Metallic Glass: A Comparative Study of Two Dyes." Materials Science Forum 921 (May 2018): 13–20. http://dx.doi.org/10.4028/www.scientific.net/msf.921.13.

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In this work, the heat-activated persulfate (PS) in the presence of Fe78Si9B13 metallic glasses (MGs) shows an extremely difference in degradation of azo dye and triarylmethane dye, where Fe78Si9B13 MGs exhibits a superior activation ability for PS with assistance of heat leading to the fast removal of two dyes. The structural features of Fe78Si9B13 MGs are firstly characterized by X-ray diffraction (XRD) and differential scanning calorimetry (DSC), following analysis of surface topography by scanning electron microscope (SEM). The results show that with the addition of Fe78Si9B13 MGs, the rec

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12

Tiji, Mohammadreza Ebrahimnataj, Jasim M. Mahdi, Hayder I. Mohammed, et al. "Natural Convection Effect on Solidification Enhancement in a Multi-Tube Latent Heat Storage System: Effect of Tubes’ Arrangement." Energies 14, no. 22 (2021): 7489. http://dx.doi.org/10.3390/en14227489.

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The solidification process in a multi-tube latent heat energy system is affected by the natural convection and the arrangement of heat exchanger tubes, which changes the buoyancy effect as well. In the current work, the effect of the arrangement of the tubes in a multi-tube heat exchanger was examined during the solidification process with the focus on the natural convection effects inside the phase change material (PCM). The behavior of the system was numerically analyzed using liquid fraction and energy released, as well as temperature, velocity and streamline profiles for different studied

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13

Liu, Xiuli, Hua Chen, Xiaolin Wang, and Gholamreza Kefayati. "Study on Surface Condensate Water Removal and Heat Transfer Performance of a Minichannel Heat Exchanger." Energies 13, no. 5 (2020): 1065. http://dx.doi.org/10.3390/en13051065.

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The condensate on the surface of the minichannel heat exchanger generated during air cooling substantially reduces the heat transfer performance as it works as an evaporator in the air-conditioning system. This has received much attention in scientific communities. In this paper, the effect of operating parameters on the heat transfer performance of a minichannel heat exchanger (MHE) is investigated under an evaporator working condition. An experimental MHE test system is developed for this purpose, and extensive experimental studies are conducted under a wide range of working conditions using

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14

Li, Min, Jasim M. Mahdi, Hayder I. Mohammed, et al. "Solidification Enhancement in a Multi-Tube Latent Heat Storage System for Efficient and Economical Production: Effect of Number, Position and Temperature of the Tubes." Nanomaterials 11, no. 12 (2021): 3211. http://dx.doi.org/10.3390/nano11123211.

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Thermal energy storage is an important component in energy units to decrease the gap between energy supply and demand. Free convection and the locations of the tubes carrying the heat-transfer fluid (HTF) have a significant influence on both the energy discharging potential and the buoyancy effect during the solidification mode. In the present study, the impact of the tube position was examined during the discharging process. Liquid-fraction evolution and energy removal rate with thermo-fluid contour profiles were used to examine the performance of the unit. Heat exchanger tubes are proposed w

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15

John, Boby. "Application of Mahalanobis-Taguchi system and design of experiments to reduce the field failures of splined shafts." International Journal of Quality & Reliability Management 31, no. 6 (2014): 681–97. http://dx.doi.org/10.1108/ijqrm-10-2012-0134.

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Purpose – The purpose of this paper is to develop a methodology to reduce the field failures of splined shafts. The paper also demonstrates the application of Mahalanobis-Taguchi system (MTS) for identifying the optimum hardness profile to avoid failures. Design/methodology/approach – Through the usage profile analysis and comparison between the failed and good shafts, the major reason for shaft failure was identified as hardness variation. Then MTS approach was used to identify the optimum hardness profile for the shafts. An experiment was designed with power, feed and the gap between inducto

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16

Ogedengbe, T. S., T. A. Adeyi, O. Q. Ajao, and O. A. Ileoye. "Study of the Effect of Quenchants on the Machinability of Heat Treated Mild-Steel." Nigerian Journal of Technological Development 19, no. 3 (2022): 333–239. http://dx.doi.org/10.4314/njtd.v19i3.5.

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Heat treated steels that are quenched rapidly show an increase in hardness and toughness but also show an increase in brittleness which could lead to a higher surface roughness and low material removal rate while machining. Hence, the choice of quenchants has a significant effect on the hardness of low carbon steels. In this research work, the effect of some selected quenchants on the mechanical properties of heat treated and machined mild steel was investigated. Four samples of the carbon steel rods were furnace heated at 8500C and quenched with water, molten salt, potash alum and used engine

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17

Deng, Shifeng, Qinxin Zhao, Teng Qu, Ning Wang, and Huaishuang Shao. "Removal pattern of particulate matter from condensing heat exchanger after wet desulfurization of coal-fired unit." Thermal Science, no. 00 (2023): 151. http://dx.doi.org/10.2298/tsci230422151d.

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The flue gas after wet desulfurization of coal-fired units still contains a large amount of particulate matter. Flue gas condensing heat exchangers are often used to further remove particulate matter. However, current research focuses on the overall removal effect of the heat exchangers, but ignores the difference of pollutant removal ability of the inner tube bundle along the flue gas flow direction. This paper studied the correlation between pollutant removal and operating parameters of condensation heat exchanger, so as to make the removed amount of pollutants as large as possible. A field

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18

Yerumbu Nandakishora, Naseem Khayum, and Chandan Patra. "Simulation-based Design of Plate-fin Heat Exchangers for Cryogenic CO₂ Removal from Biogas." Journal of Environmental Nanotechnology 14, no. 2 (2025): 1–8. https://doi.org/10.13074/jent.2025.06.2521530.

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Carbon Capture, Utilisation, and Storage (CCUS) is essential for mitigating carbon dioxide (CO2) emissions from significant sources, with CO2 removal being the fundamental stage. In biomethane upgrading, the effective elimination of CO2 from biogas is essential to comply with pipeline quality regulations and improve energy content. Among numerous removal techniques, cryogenic CO2 removal has gained considerable interest for its capacity to selectively and efficiently extract CO2 at low temperatures. The plate-fin heat exchanger (PFHE), recognised for its superior heat transfer efficiency and c

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19

Abdul Zahra, Musaddak Maher, Ekrem Yanmaz, and T. Bothichandar. "Modelling of Metal Removal Rate in Copper Alloy Milling Using MATLAB." International Journal of Antennas and Propagation 2022 (August 25, 2022): 1–6. http://dx.doi.org/10.1155/2022/4550902.

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The copper found in Earth’s soil ranks fourth in abundance among structural metals. Copper alloys are composed of copper and other elements. Most commonly, these alloys are used in aerospace, medical, and energy applications, but they are also used in many other areas. The amount of the stabilizing agents and the temperature determine which phase copper alloys exist in, including α, α + β, and β. The temperature in the cutting zone is one of the most important factors to control when machining copper alloys. Copper alloys have low thermal conductivity and high heat capacity, meaning that they

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20

Judd, R. L., H. Merte, and M. E. Ulucakli. "Variation of Superheat With Subcooling in Nucleate Pool Boiling." Journal of Heat Transfer 113, no. 1 (1991): 201–8. http://dx.doi.org/10.1115/1.2910525.

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An analysis is presented that explains the variation of superheat with subcooling that has been observed by a number of researchers investigating nucleate boiling heat transfer at constant heat flux. It is shown that superheat initially increases with increasing subcooling near saturated conditions because of the way in which changes in active site density and average bubble frequency with increasing subcooling affect the rate of heat removal from the heater surface by enthalpy transport and microlayer evaporation. As subcooling increases further, natural convection begins to play an increasin

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21

Gao, Weiran, Javit Drake, and Fikile R. Brushett. "Modeling Improved Li-Ion Cell Capacity through Suppression of Temperature with Internal Electrolyte Flow." ECS Meeting Abstracts MA2023-01, no. 25 (2023): 1673. http://dx.doi.org/10.1149/ma2023-01251673mtgabs.

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Lithium-ion cells are ubiquitous in portable electronic applications and are growing in popularity for electric vehicles including passenger cars. Yet, a dramatic reduction in global emissions to combat climate change calls for significantly broader adoption of carbon neutral technologies in electric vehicles and in stationary energy storage to complement variable renewable sources and growing electricity demand.1 For lithium-ion batteries, a critical barrier to such broader adoption is the inability to sustain high rate while also accessing the full capacity of cells. In addition to mass tran

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Fayz-Al-Asad, Md, Mehmet Yavuz, Md Nur Alam, Md Manirul Alam Sarker, and Omar Bazighifan. "Influence of Fin Length on Magneto-Combined Convection Heat Transfer Performance in a Lid-Driven Wavy Cavity." Fractal and Fractional 5, no. 3 (2021): 107. http://dx.doi.org/10.3390/fractalfract5030107.

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In the existent study, combined magneto-convection heat exchange in a driven enclosure having vertical fin was analyzed numerically. The finite element system-based GWR procedure was utilized to determine the flow model’s governing equations. A parametric inquiry was executed to review the influence of Richardson and Hartmann numbers on flow shape and heat removal features inside a frame. The problem’s resulting numerical outcomes were demonstrated graphically in terms of isotherms, streamlines, velocity sketches, local Nusselt number, global Nusselt number, and global fluid temperature. It wa

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23

farhadi, Kazem. "Estimating decay heat removal rate by natural convection for Tehran Research Reactor." Progress in Nuclear Energy 54, no. 1 (2012): 191–95. http://dx.doi.org/10.1016/j.pnucene.2011.05.029.

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Yu, Ai Bing, A. J. Wang, C. G. Luan, and S. F. Chen. "Bonds of Electroplated Diamond Tools for Optical Glass Machining." Key Engineering Materials 304-305 (February 2006): 81–84. http://dx.doi.org/10.4028/www.scientific.net/kem.304-305.81.

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Bonds of electroplated diamond tools are investigated through the studies of microstructures and properties. Three coatings for tool bonds, nickel, nickel-cobalt and bright nickel, were fabricated with electrodeposition processes, and were heat-treated with different temperatures. The hardness and microstructures of coatings were measured and observed. Optical glass K9 was machined with fabricated electroplated diamond tools to compare material removal rate and grinding ratio. The grain sizes of three bond coatings are different. The laminar structures of nickel-cobalt and bright nickel coatin

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Hassen, Abdulsalam D. M., Mohammed G. Al-Azawy, and Hussain H. Mahdy. "Experimental Investigation of Thermal Performance Parameters of Drying Air Unit with a Different Flowrate of Liquid Desiccant Solution." International Journal of Heat and Technology 40, no. 3 (2022): 815–20. http://dx.doi.org/10.18280/ijht.400321.

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Liquid desiccant air-conditioning systems remove directly the latent load from moist air and remove indirectly sensible load of this air by using an indirect evaporative cooling process. The liquid desiccant must subsequently be regeneration once again with a low-grade heat source like solar energy. In this study, calcium chloride solution was used as a desiccant. For the desiccant solution regeneration process, a flat plate solar collector was employed. Different variables, such as the primary airflow rate and desiccant flow rate, were changed during the experiments. The impact of these varia

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Svoboda, I. F., and H. J. Fallowfield. "An Aerobic Piggery Slurry Treatment System with Integrated Heat Recovery and High-Rate Algal Ponds." Water Science and Technology 21, no. 4-5 (1989): 277–87. http://dx.doi.org/10.2166/wst.1989.0230.

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A piggery with an integrated slurry removal and treatment system with heat recovery and two algal raceways for a secondary treatment of settled treated slurry has been built. Piggery slurry from about 250 fattening pigs and 100 weaners has been aerobically treated in a continuous culture reactor at 36°C. Metabolic heat and heat from the aerator after upgrading by a heat pump was utilized for space heating in a weaner house and in one of the algal raceways. Intermittent heating had little effect upon algal productivity and effluent treatment since the system was essentially light limited. Chara

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Singh, Taranveer, Khushdeep Goyal, and Parlad Kumar. "EFFECT OF PROCESS PARAMETERS FOR OPTIMUM MATERIAL REMOVAL RATE OF CYLINDRICAL GRINDING OF AISI 1045 STEEL." Journal of Mechanical Engineering 44, no. 2 (2015): 100–104. http://dx.doi.org/10.3329/jme.v44i2.21433.

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In this experimental work, the effect of various input parameters viz. work speed, wheel speed,abrasive material, depth of cut, concentration of cutting fluid and number of passes has been studied on thematerial removal rate of cylindrical grinded AISI. For experimentation, three levels of each variable have beenselected except wheel speed. Two levels of wheel speed have been taken. Heat treated AISI 1045 has beenconsidered as work piece material. The result reveals that number of passes followed by the type of abrasivematerial is the most significant to influence material removal rate. The op

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Purwono, Suryo. "Dynamic Cycling State of Nonadiabatic Catalytic Combustion of Propylene." ASEAN Journal of Chemical Engineering 6, no. 1 (2006): 8. http://dx.doi.org/10.22146/ajche.50149.

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An experimental study of nonadiabatic fixed-bed reactor for controlling propylene gas was made under flow reversal operation. Temperature measurements were made within the catalyst and packing beds. The influence of the operating parameters on the shape of temperature profiles, conversion, and heat removal were studied. The experiments showed that the maximum measured reactor temperature and heat removal were rather insensitive to changes in cycle duration and sensitive to feed flow rate and reactant concentration. The simulation results for the variation of concentration, flow rate, and cycle

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Zou, Weiwu, Baoshan Gu, Shiqing Sun, et al. "Effect of Low-Temperature Heat Treatment on PM2.5 Adsorption Properties of GO Films." Nano 14, no. 12 (2019): 1950151. http://dx.doi.org/10.1142/s1793292019501510.

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To explore the mechanism of GO acting on PM[Formula: see text], a graphene oxide (GO) film was prepared via a spraying method for air purification. The effects of different media, temperature and heat treatment times on the adsorption of PM[Formula: see text] on GO film were investigated. The morphology, composition and structure of GO materials were characterized by scanning electron microscopy (SEM), electron spectroscopy (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), infrared spectroscopy (FT-IR) and Raman spectroscopy. When the vacuum heat-treatment temperature is

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Shteling, Valentin S., Vladimir V. Ilyin, Aleksandr T. Komov, and Petr P. Shcherbakov. "Heat Removal and Thermal Stabilization of High-temperature Surfaces by a Dispersed Coolant Flow." Vestnik MEI, no. 5 (2021): 19–26. http://dx.doi.org/10.24160/1993-6982-2021-5-19-26.

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The effectiveness of stabilizing the surface temperature by a dispersed coolant flow is experimentally studied on a bench simulating energy intensive elements of thermonuclear installations A test section in which the maximum heat flux density can be obtained when being subjected to high-frequency heating was developed, manufactured, and assembled. The test section was heated using a VCh-60AV HF generator with a frequency of not lower than 30 kHz. A hydraulic nozzle with a conical insert was used as the dispersing device. Techniques for carrying out an experiment on studying a stationary heat

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Li, Zhaohui, Yating Yang, Yaqi Wen, et al. "Contrasting Perfluorooctanoic Acid Removal by Calcite Before and After Heat Treatment." Environments 12, no. 1 (2025): 29. https://doi.org/10.3390/environments12010029.

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Calcites before and after calcination at 1000 °C were evaluated for their potential removal of perfluorooctanoic acid (PFOA) from water. After heat treatment, the PFOA sorption capacity increased by 25%, from 3.2 to 3.9 mg g−1, and the affinity increased by 2.7 times, from 0.03 to 0.08 L mg−1. Kinetically, the initial rate, rate constant, and equilibrium sorption were 8.7 mg g−1 h−1, 2.6 g mg−1 h−1, and 1.8 mg g−1 for heat treated calcite, in comparison to 6.4 mg g−1 h−1, 3.1 g mg−1 h−1, and 1.4 mg g−1 for calcite without heat treatment. X-ray diffraction analyses showed phase changing from ca

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Kumar, R., V. Yadav, and R. Sh Abiev. "Concurrent Removal of Heat Transfer and Mass Flow Rate Nonuniformities in Parallel Channels of Microchannel Heat Sink." Theoretical Foundations of Chemical Engineering 54, no. 1 (2020): 77–90. http://dx.doi.org/10.1134/s004057952001011x.

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Singh, Mrigendra, S. C. Solanki, Basant Agrawal, and Rajesh Bhargava. "Performance Evaluation of Photovoltaic Thermal Collector (PVT) by Cooling Using Nano Fluid in the Climate Condiation of India." Current World Environment 18, no. 2 (2023): 683–705. http://dx.doi.org/10.12944/cwe.18.2.21.

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The hybrid PVT collector is built to deliver simultaneously using heat energy and electrical current. The overall efficiency increases with increased heat removal, lowering the cell temperature. The current study investigates the effect on heat removal rate using copper nanoparticles dissipated in volume fractions of 2% and 3% with pure water. Using mathematical modeling is constructed from the heat balance equation in different components of the PVT collector. It is found that as the volume concentration increases, the electrical performance is also increased. Average electrical efficiencies

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Amir Azirul, Adnan Ibrahim, Nurul Syakirah Nazri, Hasila Jarimi, Muhammad Ammirrul Atiqi Mohd Zainuri, and Ubaidah Syafiq. "Numerical Optimization of Thermoelectric Heat Pump Assisted Drying System." Journal of Climate Change 11, no. 1 (2025): 21. https://doi.org/10.70917/jcc-2025-003.

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One of the methods for food preservation involves utilizing the heat from solar radiation to remove moisture, aptly known as solar drying. Different approaches in enhancing solar dryer efficiency have been made throughout the years, involving circulation refinements, mechanism improvements, and insulation enhancements. Thermoelectric heat pumps (TEHP) leverage the Peltier effect to generate temperature difference that can be integrated with solar dryer system. However, the information on design and parameters for integration is scarce and underexplored. In this work, TEHP-assisted solar drying

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*Rajesh., K. Dr. K. Karuppasamy. "PERFORMANCE EVALUATION OF SOLAR GREENHOUSE DRYER FOR DRYING HERBALS." International Journal OF Engineering Sciences & Management Research 3, no. 6 (2016): 70–77. https://doi.org/10.5281/zenodo.55862.

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A solar greenhouse dryer is specially designed for drying herbals. The designed system is efficient because, the energy is trapped in greenhouse system thus maintains high temperature and leads to drying of herbals in an efficient and quickly manner. The theoretical calculations of greenhouse solar dryer is calculated by using various parameters such as solar intensity, mass flow rate, slope angle of the dryer for two different areas (CASE-I 2m² and CASE-II 0.5m²) of greenhouse dryer. And suggested the experimental setup to be fabricated for CASE-II and conducted the performance test

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Qian, Jian Feng, Ya Yuan Liu, Ying Xu, and Yan Kun Tan. "Study on Characteristics of Ultrasonic Descaling and Heat Transfer Enhancement in Sewage Source Heat Pump System." Applied Mechanics and Materials 525 (February 2014): 603–6. http://dx.doi.org/10.4028/www.scientific.net/amm.525.603.

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sewage heat exchanger is important to collect heat energy in sewage source heat pump system. Heat transfer enhancement effect is not obvious while the chemical methods and manual cleaning is applying to remove the heat exchangers fouling in the long-term operation. Here sets an ultrasonic incrustation removal physical model in heat exchanger structure to antiscaling and descaling simultaneously. The acoustic cavitation technology can be used in sewage source heat pump systems for the experimental results and decontamination rate reaches 50%.

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Xu, Wen Ji, J. B. Meng, Jian Cheng Fang, and Xu Yue Wang. "Model of Heat and Mass Transfer in Atmospheric Pressure Plasma Arc (APPA) Cleaning Metal Surface." Key Engineering Materials 373-374 (March 2008): 408–11. http://dx.doi.org/10.4028/www.scientific.net/kem.373-374.408.

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According to analyzing the principle of atmospheric pressure plasma arc (APPA) cleaning metal surface, a model of heat and mass transfer is put forward with using transient-state heat transfer equation about interior heat source and Arrhenius equation of chemical reaction kinetics theory. With finite volume method, the one dimensional control differential equation is transformed into discrete control equation, which is calculated numerically and analyzed with the using of implicit scheme. Taken cleaning lubricant film as an example and analyzed temperature distribution of cleaning film on meta

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Park, Kwiyoung, Dongchan Lee, Hyun Joon Chung, and Yongchan Kim. "Performance Improvement of Condensation Reduction and Removal in Heat Recovery Ventilators Using Purge Methods." Energies 13, no. 22 (2020): 6152. http://dx.doi.org/10.3390/en13226152.

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In this study, several purge and ventilation methods are proposed to reduce and remove condensation in a heat recovery ventilator for commercial and household buildings. The effects of the airflow rate, duration of ventilation, purge interval, and return air temperature on the quantities of condensation and condensation removal in the heat recovery ventilator are analyzed. The increase in the air flow rate and return air temperature increases the condensation removal rate owing to the enhanced evaporation of the condensate. Furthermore, the reductions in the duration of ventilation and purge i

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Jäggi, Beat, Daniel J. Förster, Rudolf Weber, and Beat Neuenschwander. "Residual heat during laser ablation of metals with bursts of ultra-short pulses." Advanced Optical Technologies 7, no. 3 (2018): 175–82. http://dx.doi.org/10.1515/aot-2018-0003.

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Abstract The usage of pulse bursts allows increasing the throughput, which still represents a key factor for machining with ultra-short pulsed lasers. The influence of the number of pulses within a burst on the specific removal rate is investigated for copper and stainless steel. Furthermore, calorimetric measurements were performed to estimate the residual energy coefficient as well as the absorptance of machined surfaces for copper to explain the reduced specific removal rate for a 2-pulse burst and the similar or even higher rate for a 3-pulse burst compared to single pulse ablation. Based

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Rayaan Kakad and Sunny Kumar Barnwal. "A COMPUTATIONAL MODEL TO PREDICT MATERIAL REMOVAL DEPTH IN WIRE-EDM OF SILICON WAFERS SLICING." Journal of Manufacturing Engineering 18, no. 4 (2023): 136–40. http://dx.doi.org/10.37255/jme.v18i4pp136-140.

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Wire-electrical discharge machining (wire-EDM) has the potential to manufacture ultra-thin silicon wafers, significantly enhancing the efficiency of solar photovoltaic cells. However, the fabrication of ultra-thin silicon (Si) wafers through wire-EDM is constrained by its inherently lower material removal rate. This limitation can potentially reduce the throughput rate of solar cell production. The key to producing wafers with the maximum material removal rate lies in selecting the optimal processing parameters. The traditional experimental-based optimization is time-consuming and complex. To

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Harpreet, Singh *., Sharma Er.Sandeep, and Mohit Gaba Er. "ANALYSIS OF SURFACE ROUGHNESS AND MATERIAL REMOVAL RATE IN DRY AND THERMAL ASSISTED MACHINING OF EN8 STEEL." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 5, no. 3 (2016): 737–41. https://doi.org/10.5281/zenodo.48350.

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It is widely understood that aerospace materials such as titanium, nickel based alloys and high strength steels are difficult to machine owing to their favorable material properties. An alternative pathway to achieving greater tool life is thermally assisted machining (TAM). This approach is seemingly contradictory to the traditional method and instead relies on introducing heat from an external source to reduce the work piece material’s strength and hardness, thereby reducing cutting forces and making the material easer to machine. In present research to investigate experimentally the r

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Nurmanova, Makhfuza Urozovna. "CONSTRUCTION AND PERFORMANCE STUDY OF A ROCK BED BLACK AGATE HOME TYPE SOLAR AIR HEATER WITH SOLAR DRYER." Educational Research in Universal Sciences 1, no. 6 (2022): 206–12. https://doi.org/10.5281/zenodo.7401803.

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This article presents an evaluation of the construction and performance of a Black Agate stone bed. The house has a new type of solar air heating system with a total area of 1m2. The system is made from locally available materials and installations, operations are carried out in the developing country of Uzbekistan. Rock is used as thermal mass storing heat from the sun and releasing heat in the absence of effective radiation. Drying indicators were with hygroscopic products is carried out using a solar dryer. Solar air heater performance is rated differently air flow rate and the optimal air

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Hussain, Taliv. "Performance evaluation of hybrid desiccant air conditioning system regenerated by waste heat from air cooled condenser: Experimental Investigation." IOP Conference Series: Materials Science and Engineering 1224, no. 1 (2022): 012014. http://dx.doi.org/10.1088/1757-899x/1224/1/012014.

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Abstract Heating ventilation and air conditioning units reject a large quantity of heat to the surroundings as waste. Thus proper reclamation of this unused heat could also enhance the COP of such arrangements and their lesser adverse effect on the environment. Therefore hybrid desiccant air conditioning unit using unused heat from condenser for regeneration can be more effective than the conventional air conditioning unit under hot and humid climatic conditions. In this paper, various performance parameters of hybrid desiccant air conditioning unit using unused heat from condenser is determin

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Kuz’menko, V. M., V. A. Shklovskii, and A. N. Vladychkin. "Effect of heat removal on avalanche crystallization of amorphous metals." Soviet Journal of Low Temperature Physics 17, no. 1 (1991): 54–56. https://doi.org/10.1063/10.0032766.

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The dependence of the rate of propagation of the avalanche (explosive) crystallization front on the thickness of amorphous bismuth films is studied. It is shown that avalanche crystallization cannot take place in amorphous films of ytterbium and bismuth on metal substrates. The obtained results are explained in the framework of the modern theory.

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Wang, Jei-Pil, and Chimeddorj Ganzorig. "Study on Heavy Metal Adsorption Capacity According to Modification Conditions with K-Zeolite." International Journal of Membrane Science and Technology 10, no. 3 (2023): 3173–85. http://dx.doi.org/10.15379/ijmst.v10i3.3142.

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In this study, synthetic zeolites were prepared using a sample obtained by removing Li from used LAS (Li2O-Al2O3-SiO2) crystallized glass, which is a material for induction top plates, through a sulfuric acid heat reaction. The removal experiment of heavy metals (Pb, Cd, Cr6+, Hg) ions present in wastewater was conducted. Two types of zeolites were used for heavy metal adsorption: before and after K+ modification. The changes in the amount of heavy metal adsorption were investigated depending on the adsorption reaction conditions, such as the amount of zeolite used as an adsorbent, adsorption

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Pokholchenko, Vyacheslav A., Alexander M. Ershov, and Ludmila A. Mishanina. "Modeling of cephalopods heat treatment processes." Processes and Food Production Equipment 17, no. 1 (2024): 44–55. http://dx.doi.org/10.17586/2310-1164-2024-17-1-44-55.

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The dehydration processes kinetics laws of squid and octopus, as a separate capillary-porous colloidal bodies group, were studied using industrial methods of energy supply. The research included an analysis of the influence of the species and size-mass composition of the material as well as operating conditions in the process of removing moisture from the product. The method was used to find critical points corresponding to a certain level of humidity in a specific period of time. It was found that cephalopods constant rate moisture removal is significantly longer compared to fish raw material

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Zhu, J. H., J. Yang, C. H. Ge, Hong Xia Zhang, C. Y. Zhu, and J. T. Li. "Functional Studies on Coffee Yarn Knitted Clothing Fabrics." Applied Mechanics and Materials 457-458 (October 2013): 28–31. http://dx.doi.org/10.4028/www.scientific.net/amm.457-458.28.

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To study functionality of coffee yarn knitted clothing fabrics, use five different proportion of coffee yarn: 70% viscose/30% coffee yarn; 67.5% viscose/32.5% coffee yarn; 65% viscose/35% coffee yarn; 62.5% viscose/37.5% coffee yarn; 60% viscose/40% coffee yarn, knit five kinds of fabrics on computerized flat knitting machine.Test and analysis odor removal performance, hygroscopic, heat accumulation function of trial fabrics. The results show that: to coffee yarn and viscose blended knitted fabrics, along with coffee yarn content increases, the odor removal rate of the fabric has increased sig

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Duan, Yapeng, and Xuesheng Wang. "Study on heat transfer enhancement of finned tube boiling in water tank." E3S Web of Conferences 267 (2021): 02068. http://dx.doi.org/10.1051/e3sconf/202126702068.

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A passive residual heat removal heat exchanger (PRHR HX) was used as the research object, and an experimental device with heat conduction oil as the heat source was set up to complete the experimental study of the outside tube saturation boiling. The improved Wilson diagram method was used to calculate the experimental data, and the heat transfer law of the outside tube boiling of smooth tube and finned tube was obtained. Compared with the two types of tubes, the intensification rate of smooth tube was 1.07, and that of finned tube was 2.39, and the finned tube was 2.23 times that of smooth tu

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Nallusamy, S. "Analysis of MRR and TWR on OHNS Die Steel with Different Electrodes Using Electrical Discharge Machining." International Journal of Engineering Research in Africa 22 (February 2016): 112–20. http://dx.doi.org/10.4028/www.scientific.net/jera.22.112.

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Electrical Discharge Machining is a machining method primarily used for hard metals or those that are impossible to be machined with traditional techniques. The experimental investigation of material removal rate and tool wear rate during machining of oil hardened non-shrinking steel with brass and copper electrodes using EDM machine was carried out in this paper. This investigation presents the analysis and evaluation of heat affected zones and surface finish of the work piece using different tool electrodes and varying the machine parameters. The commercial grade kerosene oil has been used a

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Li, Hong Bin, Wen Ying Shi, and Yu Feng Zhang. "A Novel Synthesis Process of PPTA by Nitrogen Cooling for Reaction Heat Removal." Advanced Materials Research 941-944 (June 2014): 1249–52. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.1249.

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Poly (p-phenylene terephthalamide) (PPTA) was synthesized by different processes including single feeding, batch feeding and inlet nitrogen cooling. The effects of these three processes on reaction heat removal of PPTA polymerization were compared. The degree of reaction heat removal was characterized through the changes of system temperature and stirring rate with reaction time. Results suggested that during the processes of batch feeding and nitrogen cooling, system temperature could be effectively decreased and PPTA yields were both larger than 98 %. It indicated that the exothemic heat cou

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