The design and optimisation of new refrigerant mixtures to satisfy a range of duties across the cold chain is discussed with special reference to the use of R-1234ze(E) as a blend component. Performance data are presented from test evaluation in a range of equipment.Robert Low...
It was found that the compressor had the highest exergy destruction compared to the other components. It was found that R152 was the refrigerant with zero ozone depletion potential (ODP) and a GWP value of 140 with less exergy destruction and irreversibilities. Moreover, it was easy to use...
Currently, R-410A is the refrigerant used almost exclusively in residential heat pumps, and research has focused on finding low-GWP alternatives to R-410A. Lower-GWP replacements for R-410A should possess the following key characteristics: (1) similar volumetric capacity, to enable available comp...
Liquidviscosityoflow-GWPrefrigerantmixtures(R32+R1234yf)and (R125+R1234yf) YaguDang a ,TakumiKamiaka b ,ChaobinDang b,⇑ ,EijiHihara b a CollegeofChemicalEngineering,SichuanUniversity,Chengdu,PRChina b GraduateSchoolofFrontierSciences,TheUniversityofTokyo,Tokyo,Japan articleinfo Articlehistory: Receiv...
In fact the high thermal effectiveness of the BPHEs may limit the reduction of performance of secondary fluid refrigeration units, whereas the BPHEs involve a reduction of the refrigerant charge in direct expansion units of one order of magnitude as compared to the traditional tubular heat ...
a commonly used refrigerant in the ejector system.The results indicated that the systems with R1233zd(E)and R1336mzz(Z)had a higher entrainment ratio and lower pump work.The pump works when using R1233zd(E)and R1336mzz(Z)can be up to 14.59%and 38.05%lower than those of R245fa,...
The paper describes how the energy efficiency issue has been dealt with during the last 30 years, when several types of refrigerant conversions took place. It provides a comprehensive analysis of the potential for equipment energy efficiency improvement achievable when converting to low-GWP alternatives...
For that, the performance of a stand-alone cabinet (four low-GWP refrigerants) has been considered as reference. It has been concluded that leakage consideration makes classical TEWI to underestimate emissions for any country, refrigerant or annual leakage ratio, up to 20% in this study. ...
The properties of refrigerant mixture have been analyzed using National Institute of Standards and Technology (NIST) reference fluid thermodynamic and transport properties database REFPROP 10.01 software, and the EES software is used in order to calculate the COP of the mixture for the different ...
The working fluids used in this study were R410A, as reference refrigerant, and low global warming potential (LGWP) refrigerants R32, R1234yf, and R454B, a new LGWP mixture candidate to replace R410A, whereas the lubricant was VG 32 POE oil. The effects of oil mass fractions (OMF) ...