Optimal design of low temperature (cascade) refrigeration system
Author(s):
Afzal jawaid, Nitin Jain
Keywords:
Abstract
Ammonia/CO2 mixture is presently considered to be the best for cascade refrigeration up to 216.58ºK. However to approach temperatures lower than 216.58ºK the mixture of CO2 with other refrigerants are required. The aim of present work was to study the possibility of using carbon dioxide mixtures in those applications where temperatures below triple point (216.58 K) are needed. The blends considered for analysis purpose are R744/R125, R744/R41, R744/R32, and R744/R23. The analysis of cascade refrigeration cycle has been carried out with the help of a computer program developed using Engineering Equation Solver (EES). The composition of CO2 is varied from a mole fraction of 0.1 to 0.8 along with R23, R32, R41 and R125. The mixtures properties of the investigated blends (R744/R125, R744/R41, R744/R32, and R744/R23) were calculated by Ref Prop 7.0 and used in EES program.
Article Details
Unique Paper ID: 153396

Publication Volume & Issue: Volume 8, Issue 7

Page(s): 37 - 41
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