HCFC22-based vapour absorption refrigeration systems. Part II: Influence of component effectiveness

✍ Scribed by M. Fatouh; S. Srinivasa Murthy

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 689 KB
• Volume: 20
• Category: Article
• ISSN: 0363-907X
• DOI: 10.1002/(sici)1099-114x(199605)20:5<371::aid-er152>3.0.co;2-#

✦ Synopsis

A thermodynamic analysis was performed on a single-stage vapour absorption refrigeration system W A R S ) operating with monochlorodifluouromethane (HCFC22) as a refrigerant and dimethylether of tetraethyleneglycol (DMETEG) or dimethyl acitamide (DMA) as a working fluid. Influence of solution heat exchanger effectiveness (Eh) and mass transfer effectivenesses of absorber (E,) and generator (E,) on the performance of VARS were studied. The variations in heat quantities at solution heat exchanger, generator and absorber as well as performance characteristics, namely CR, COP, and second law efficiency ( E ) at various operating temperatures are reported. As expected, low CR and high COP,,, and E can be obtained at high values of E,, E, and E . The effects of Eh on the performance is more pronounced when compared to that of Ea and E . Also, the cgange in the circulation ratio (CR) due to a given change in E, is higher than that due to the same cfiange in E,. CR is not a function of Eh. A comparison of the influence of Eh, E,, and E, on the VARS performance for HCFC22-DMA and HCFC22-DMETEG pairs was made.