“直接替代”一词可追溯到氯氟烃(CFCs)的淘汰时期。在淘汰氟氯化碳的过渡期间,开发了氢氯氟烃(HCFCs)做为”中短期”制冷剂,如R22,用于现有的R12和R502设备。这些制冷剂与现有CFC设备中使用的矿物油具有很高的混溶性。用这些”中短期”制冷剂对设备进行改造,可以减少对系统润滑油管理方面的顾虑,使改造相对容易,导致...
(24) Of course, because the fuel produced will be adrop-inreplacement for ordinary gasoline and diesel[/drop-in.html], driving will still release CO2 to the atmosphere. (25) I dropped out of Reed College after the first 6 months, but then stayed around as adrop-infor another 18 months...
A method for producing refrigeration in a refrigeration system designed for R-134a including the step of drop-in substituting for the R- 134a mixtures of R-152a, R-134a and R-125 to produce greatly improved performance in air conditioning systems designed to use only R-134a as the sole re...
Selladurai, Experimental analysis of a new refrigerant mixture as drop- in replacement for CFC12 and HFC134a, International Journal of Thermal Sciences 47 (2008) 1490-1495.Mani K, Selladurai V. Experimental analysis of a new refrigerant mixture as a drop in replacement for CFC 12 and HFC...
Drop-in tests were conducted using R290/R32 (31:69) mixture in an ice-cream maker for possible replacement of R-502 and R-404A. Optimum refrigerant charge and TEV opening were obtained through a series of experiments. At the standard outdoor condition (35℃ DT, 24℃ WT), the time requ...
R. Experimental study of R452B and R454B as drop-in replacement for R410A in split heat pumps having tube-fin and microchannel heat exchangers. Appl. Therm. Eng. 5(204), 117930 (2022). Article Google Scholar Chen, Y., Shen, C., Shi, M. & Peterson, G. P. Visualization study ...
R. Experimental study of R452B and R454B as drop-in replacement for R410A in split heat pumps having tube-fin and microchannel heat exchangers. Appl. Therm. Eng. 5(204), 117930 (2022). Article Google Scholar Chen, Y., Shen, C., Shi, M. & Peterson, G. P. Visualization study ...
The refrigerant mixture has a vapour density which renders it suitable for use as an R12 replacement in a centrifugal compression refrigeration system. The molecular weight of the mixture approximates 121. Preferred mixtures include 67 wt.% tetrafluoroethane and 33 wt.% octafluoropropane; 69 wt.%...