Results 11 to 20 of about 271 (169)

Thermal Performance Analysis of Low-GWP Refrigerants in Automotive Air-Conditioning System

Advances in Materials Science and Engineering, 2020
The energy and exergy of low-global warming potential (GWP) refrigerants were investigated experimentally and theoretically. Refrigerants with a modest GWP100 of  ≤ 150 can be sufficient for bringing down emissions which were concerned for the automotive
Yousuf Alhendal, Abdalla Gomaa, Gamal Bedair, Abdulrahim Kalendar   +3 more
doaj   +2 more sources

A Study on New Refrigerant R1234ze(E) and Its Mixtures

Zhileng xuebao, 2015
Over the past few years, more attention have been paid to the new low GWP refrigerant R1234ze(E), as a kind of ideal alternative of R134a. But, thermodynamic property and transfer characteristic are not good enough.
Qiu Jinyou, Zhang Hua, Qi Yingxia, Wang Xi, Yu Xiaoming   +4 more
doaj   +1 more source

Experimental Study on the Solubility of R1234ze(E) in Polyol Ester Oils

Zhileng xuebao, 2020
R1234ze(E)(1,1,1,3-tetrafluoropropene) is extremely environmental-friendly and is currently considered as one of the alternative refrigerants. In this paper, the solubility of R1234ze(E) in two polyol ester oils was measured at temperatures ranging from ...
Zhao Wenzhong, Yang Zhao, Zhai Rui, Feng Biao, L, Zijian, Chen Yubo, Ge Yingying   +7 more
doaj   +1 more source

Performance Evaluation of Centrifugal Refrigeration Compressor Using R1234yf and R1234ze(E) as Drop-In Replacements for R134a Refrigerant

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, Yuanyang Zhao, Guangbin Liu, Qichao Yang, Guoxin Yu, Liansheng Li   +5 more
doaj   +1 more source

Study on the Performance of New High Temperature Heat Pump Mixtures as Alternatives to R245fa

Taiyuan Ligong Daxue xuebao, 2023
Purposes At present, the contradiction between energy supply and demand is increasingly intensifying, and high-temperature heat pumps, as an energy-saving and emission-reduction technology, can upgrade a large amount of low-grade waste heat to high-grade
Biao FENG, Zhao ZHANG, Linrui JIAN, Guanjia ZHAO, Suxia MA   +4 more
doaj   +1 more source

Simulation on Annular Flow of R1234ze(E) Flow Boiling in Micro-tubes

Zhileng xuebao, 2020
A theoretical model for annular flow of R1234ze(E) flow boiling in micro-tubes was proposed in this paper. The surface coefficient of heat transfer and pressure drop were calculated using the model.
王金, 李俊明
doaj   +1 more source

Condensation and evaporation of R32/R1234ze(E) and R744/R32/R1234ze(E) flow in horizontal microfin tubes

Condensation and evaporation of R32/R1234ze(E) and R744/R32/R1234ze(E) flow in horizontal microfin tubes, 2015
The heat transfer characteristics of the low global warming potential refrigerant mixture R744/R32/R1234ze(E) in a horizontal microfin tube were investigated in this study. The condensation heat transfer coefficient of R744 /R32/R1234ze(E) (9/29/62 mass %) is somewhat lower than that of other mixtures, e.g., R744/R32/R1234ze(E) (4/43/53 mass %) and R32/
Chieko Kondou, Fumiya Mishima, Shigeru Koyama   +2 more
openaire   +2 more sources

A comparative study of combined cycles for concentrated solar power for efficient power generation using low Global Warming Potential (GWP) fluids to reduce environmental effects

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
wiley   +1 more source

Comparison of the New Refrigerant R1336mzz(E) with R1234ze(E) as an Alternative to R134a for Use in Heat Pumps [PDF]

Processes, 2022
R134a is currently the most widely used refrigerant, whose problem is the high value of the global warming potential, and which will have to be replaced in the near future. Thus far, R1234ze(E) has proven to be the most suitable alternative, but it is slightly flammable. Recently, R1336mzz(E) has emerged as a possible alternative.
Jan Drofenik, Danijela Urbancl, Darko Goričanec   +2 more
openaire   +2 more sources

Waste heat recovery of the hydrogen–water mixture from high‐temperature water electrolysis by cascade heat pump for steam generation

Energy Science &Engineering, Volume 11, Issue 9, Page 3070-3081, September 2023., 2023
A cascade heat pump is used to absorb latent heat of steam condensation. After twice compressions, the temperature of the working fluid is sufficiently high to vaporize liquid water. The heat pump fully utilizes thermal energy instead of direct electric heating, saving 65% of power consumption. Abstract Waste heat recovery is common in high‐temperature
Zhicong Fang, Zhiguang Chen, Zekun Yang, Shuhao Zhang   +3 more
wiley   +1 more source