Results 1 to 10 of about 15,890 (250)

Comparative Evaluation of R134a and HFO-1234ze Cryogen Spray Cooling Using a Mouse Model With Controllable Epidermal Pigmentation. [PDF]

Lasers Surg Med
ABSTRACT Objectives Cryogen spray cooling (CSC) is critical for protecting the epidermis during laser dermatologic procedures. The widely used cryogen, R134a, has a high global warming potential (GWP), motivating interest in environmentally favorable alternatives such as HFO‐1234ze.
Jia W, Jeong Y, Huynh C, Lai O, Nguyen E, Swajian G, Niu J, Kashikar A, Khaw J, Pu H, Choi B, D'Orazio J, Nelson JS, Anvari B.   +13 more
europepmc   +2 more sources

Performance comparison of DME and R134a refrigerants in a room air conditioner: Effect of subcool and superheat [PDF]

E3S Web of Conferences
The demand for environmentally friendly refrigerants arises to anticipate two global environmental issues: global warming and climate change. The use of environmentally friendly refrigerants is one of the efforts to address these issues.
Setyawan Andriyanto, Mitrakusuma Windy Hermawan, Simbolon Luga Martin   +2 more
doaj   +2 more sources

Capture Fluorocarbon and Chlorofluorocarbon from Air Using DUT‐67 for Safety and Semi‐Quantitative Analysis [PDF]

Advanced Science
Fluoro‐ and chlorofluorocabons (FC/CFCs) are important refrigerants, solvents, and fluoropolymers in industry while being toxic and carrying high global warming potential.
Xiao‐Hong Xiong, Liang Song, Wei Wang, Hui‐Ting Zheng, Liang Zhang, Liu‐Li Meng, Cheng‐Xia Chen, Ji‐Jun Jiang, Zhang‐Wen Wei, Cheng‐Yong Su   +9 more
doaj   +2 more sources

Comparison of R134a and R516A’s Performance at Different Air Velocities in Two Evaporator Ejector Cooling System

Hittite Journal of Science and Engineering, 2023
This study aims experimentally to investigate the performance parameters of R134a and the alternative R516A refrigerant in two evaporator ejector cooling system (DEES) at different air velocities of evaporator#1.
Mahmut Cüneyt Kahraman, Ümit İşkan, Mehmet Direk   +2 more
doaj   +1 more source

Cavitation dynamics and thermodynamic effect of R134a refrigerant in a Venturi tube. [PDF]

Ultrason Sonochem
Zhang B, Zhang Z, Fang X, Xue R, Chen S, Hou Y.   +5 more
europepmc   +2 more sources

Experimental study on phase change heat transfer cooling plate for multiple heat sources cooling with high heat flux

Xi'an Gongcheng Daxue xuebao, 2023
In view of the heat dissipation of electronic components with high heat flux, five phase change heat transfer cold plates with different structures and processing methods were designed, the effects of cold plate structural parameters, heat flux ...
LIU Kai, LIU Jinping, ZHOU Yi, ZHU Wenjie, WANG Zesong   +4 more
doaj   +1 more source

Evaluation of The Use R450A as an Alternative to R134a in Low and Medium Temperature Heat Pump Systems: 4-E (Energy, Exergy, Environmental and Enviro-Economic) Analysis

Journal of Advanced Research in Natural and Applied Sciences, 2021
This investigation presents a theoretical evaluation of the use R450A replace to R134a in the low and medium temperature heat pump systems. The energy, exergy, environmental and enviro-economic analyzes of heat pumps have been performed for two ...
Ragıp Yıldırım
doaj   +1 more source

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
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

Experimental study of R290 replacement R134a in cold storage air conditioning system

Case Studies in Thermal Engineering, 2022
R290 refrigerant offers good environmental protection and thermodynamic characteristics. The feasibility of R290 replacing R134a was summarized through theoretical analysis and experimental tests in this paper.
Huifan Zheng, Guoji Tian, Yahui Zhao, Chao Jin, Fujun Ju, Congmin Wang   +5 more
doaj   +1 more source