Results 61 to 70 of about 1,212 (176)
IET Smart Energy Systems, Volume 1, Issue 2, Page 168-200, September 2025.This review focuses on the recent advances in the key research and technology development of transcritical CO2 heat pumps and integrated energy systems including sustainable ‘green’ heating, energy storage, electro‐thermal storage, waste heat recovery and disruptive electrification of renewable energy, combined heating and power, and new hybrid systems.
Lixin Cheng, Hongzhi Li, Haijun Wang
wiley +1 more source
Energy and Built EnvironmentR134a-DMF absorption heat pump unit is an energy-saving heat pump unit that can utilize renewable energy, and has great potential in the refrigeration and heating fields of urban and rural areas.
Zhaoyi Zhuang +4 more
doaj +1 more source
Comparative Research on Performances of R516A and R134a in Water-Cooled Chillers
Zhileng xuebaoR516A is one of the new substitutes for R134a refrigerant in water-cooled chillers. The COP (coefficient of performance) and discharge temperatures of R516A and R134a are compared through a single-stage vapor compression cycle. Under nominal and variable
Li Xiongya, Hua Xue, Guo Xiaolin
doaj
ELECTRON SCATTERING CROSS SECTIONS OF 1,1,1,2-TETRAFLUOROETHANE (R134a)
CONTRIBUTED PAPERS & ABSTRACTS of INVITED LECTURES, TOPICAL INVITED LECTURES and PROGRESS REPORTS: 32nd SUMMER School and International Symposium on the Physics of Ionized GasesAbstract A revised set of electron-molecule-scattering cross section for the refrigerant R134a ( CF 3
Marnik Metting van Rijn +2 more
openaire +4 more sources
Femtosecond Laser Tagging in R134a with Small Quantities of Air
AIAA Journal, 2019 Femtosecond laser tagging is demonstrated for the first time in R134a (1,1,1,2-Tetrafluoroethane) gas, and in mixtures of R134a with small quantities of air. A systematic study of this tagging method is explored through the adjustment of gas pressure, mixture ratio and laser properties.
Yibin, Zhang +2 more
openaire +2 more sources
Flow boiling heat transfer of R134a in multi microchannels
International Journal of Heat and Mass Transfer, 2017 Abstract Experiments were conducted to investigate flow boiling heat transfer of R134a in a multi microchannel heat sink. The heat sink consisted of 25 rectangular microchannels with nominal dimensions of 300 µm wide, 700 µm deep ( D h = 420 µm) and 200 µm separating wall thickness.
Fayyadh, EM +3 more
openaire +2 more sources
Stability and activity of lipase in subcritical 1,1,1,2-tetrafluoroethane (R134a)
Journal of Industrial Microbiology & Biotechnology, 2007 The stability and activity of commercial immobilized lipase from Candida antarctica (Novozym 435) in subcritical 1,1,1,2-tetrafluoroethane (R134a) was investigated. The esterification of oleic acid with glycerol was studied as a model reaction in subcritical R134a and in solvent-free conditions.
Gang, Yu +4 more
openaire +2 more sources
EXERGETIC PERFORMANCE OF A DOMESTIC REFRIGERATOR USING R12 AND ITS ALTERNATIVE REFRIGERANTS [PDF]
Journal of Engineering Science and Technology, 2010 Production and use of R12 and other chlorofluorocarbon refrigerants will be prohibited completely all over the world in the year 2010 due to their harmful effects on the earth’s protective ozone layer.
BUKOLA O. BOLAJI
doaj
Study of Water-cooled Auto-cascade Refrigeration Cycle with a Low Temperature of﹣60 ℃
Zhileng xuebao, 2015 A new water-cooled auto-cascade refrigeration cycle(WACR) using a binary refrigerant mixture is presented, which adopts a condenser-phase separator instead of a condenser and an evaporative separator in traditional auto-cascade refrigeration cycle.
Yang Yongan, Yang Zhao, Liu Bin
doaj +2 more sources
R134a和R417A应用于热泵热水器灌注式替代R22的实验分析
Zhileng xuebao, 2011 The theoretical calculation and experimental analysis of R22,R417 and R134a were carried out in air source heat pump water heaters.The results show that the heating capacity and COP of R417A are close to R22 compared to R134a and the discharge ...
doaj +2 more sources