Results 11 to 20 of about 2,942 (221)
Energy Science & EngineeringThis paper proposes an ejector‐expansion refrigeration cycle (EERC) with two evaporating temperatures to recover partial expansion work and greatly reduces the throttling loss of the other expansion valve connected to the evaporator compared with the ...
Xiaoqin Liu, Weibin Wang, Jianyong Wang
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Review and Potential Analysis of R1234yf Heat Pump Technology
Zhileng xuebao, 2020 Electric vehicles do not have sufficient engine waste heat to meet heating demands in winter. As such, heat pump technology has become a research hotspot to achieve a higher efficiency than electric resistance heat.
Liu Yusheng +3 more
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Study on Leakage Diffusion of R1234yf Vehicle Air Conditioner
Zhileng xuebao, 2022 The thermal management system of electric vehicles is different from that of traditional passenger vehicles. For electric vehicles with a heat pump system and liquid cooling battery, the refrigerant charge is increased by 400–800 g compared with ...
Wang Linlin, Yang Zhao, Wang Dan
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Journal of EngineeringThis study used the Ansys Fluent® computational fluid dynamics code in conjunction with a volume of fluid multiphase model and phase-change model to analyze the flow boiling evaporation heat transfer coefficient and flow patterns of R32 and R1234yf with ...
Latifur Islam +3 more
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Energy Sources and Thermal Management Technologies for Electric Vehicle Batteries: A Technical Review. [PDF]
Glob ChallOverview of Battery Thermal Management System (BTMS) methods, including air, liquid, cold plate, and hybrid cooling strategies—highlighting direct/indirect liquid techniques and hybrid integrations like PCM, refrigerant, and heat pipe systems. Abstract Efficient thermal management of high‐power lithium‐ion batteries (LiBs) is critical for ensuring ...
Rahman MA +6 more
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IET Renewable Power Generation, Volume 17, Issue 16, Page 3741-3754, 7 December 2023., 2023 Low global warming potential (GWP) fluids were used to investigate strategies for reducing the effects of global warming and performance compared with hydro fluoro carbons (HFC) fluids. Four different combinations of the sCO2 cycle and ORC, including basic recuperated, pre‐compression, recompression with main compressor intercooling, and partial ...
Yunis Khan, Hakan Caliskan, Hiki Hong
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Case Studies in Thermal Engineering, 2020 R134a, one of the most commonly used refrigerants especially for air conditioning (AC) systems, will be banned in automotive air conditioners after 2022 due to a high global warming potential (GWP).
Xinwen Chen +5 more
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Energies, 2023 Organic Rankine cycles (ORCs) have been widely used to convert medium-low-temperature geothermal energy to electricity. Proper cycle layout is generally determined by considering both the thermo-physical properties of the working fluid and the geothermal
Qiang Liu +3 more
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Energy Science &Engineering, Volume 11, Issue 9, Page 3289-3306, September 2023., 2023 In this work, pumped thermal energy storage systems based on a transcritical CO2 charging process are investigated. A two‐zone water storage tank with a storage temperature of 115°C is used as thermal energy storage. For discharge, an Organic Rankine Cycle and, alternatively, a transcritical CO2 heat engine are investigated.
Jonas Bodner +3 more
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Theoretical analysis of a Low GWP Refrigerants as a Drop in substitute of R134a in a Domestic Refrigerator [PDF]
Iranica Journal of Energy and Environment, 2018 Now a days Fridges and Air-conditioners are mostly used in domestic environment. The CFCs have been almost ruled out since 1995 due to their huge impact on the ozone layer, due to the above problem HFC refrigerants are introduced but these are having a ...
M. Shaik Sk, K. Srinivas
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