Results 11 to 20 of about 386 (171)
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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Energy and exergy investigations of r1234yf and R1234ze as R134a replacements in mechanically subcoo
Journal of Thermal Engineering, 2021 The aim of present work is the evaluation of mechanically subcooled simple vapour compression refrigeration system on the basis of energy and exergy analysis, and compatibility of alternative low GWP and zero ODP HFOs R1234yf and R1234ze to replace HFC ...
Shyam AGARWAL +2 more
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The Analysis of Next-Generation Refrigerants in Terms of Energy, Exergy, and LCCP Perspective
Düzce Üniversitesi Bilim ve Teknoloji Dergisi, 2023 In this study, commonly used hydrofluorocarbon (HFC)-based refrigerants R404A and R410A, as well as hydrofluoroolefin (HFO)-based environmentally friendly next-generation refrigerant R1234yf with a low global warming potential (GWP), were analyzed in ...
Mehmet Onur Karaagac +3 more
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FILM –WISE CONDENSATION OF R1234yf AND R134a REFRIGERANTS ON FINNED TUBE WITH 32 FINS PER INCH
Wasit Journal of Engineering Sciences, 2022 Researchers have been motivating by the global warming challenge to develop alternatives substances to compounds that contribute to this problem. The refrigerant R134a (HFC134a) has been identified as one of the most environmentally damaging gases. As a
Jasim Khalid, Alaa R. Al-Badry
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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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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, 2022 With the increasing global requirements for environmental protection, refrigerants with ODP of 0 and low GWP are widely concerned and applied. In this paper, the CFD numerical method simulates the R134a centrifugal compressor directly replaced by R1234yf
Kexin Yi +5 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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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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