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Performance of an HCFC-22-based vapour absorption refrigeration system.

Author(s) : FATOUH M., SRINIVASA MURTHY S.

Type of article: Article, IJR article

Summary

A single stage vapour absorption refrigeration system is tested with monochlorodifluoromethane (HCFC-22) as refrigerant and different absorbents: dimethylether of tetraethylene glycol (DMETEG) and dimethyl acetamide (DMA). The influence of generator temperatures in the range 75-95 deg C, which represents low grade heat sources, is studied. Cooling water temperatures were varied between 20 and 30 deg C. Two cases of cooling water flow paths are considered, i.e. water entering either absorber or condenser, which are connected in series. For HCFC-22/DMETEG, COP values in the range 0.2-0.36 and evaporator temperatures between 0 and 10 deg C are obtained. For HCFC-22/DMA, COP values in the range 0.3-0.45 and evaporator temperatures between -10 and 10 deg C are obtained. It is observed that HCFC-22/DMETEG can work at lower heat source temperatures than HCFC-22/DMA. However, at the same operating conditions HCFC-22/DMA is better from the viewpoints of circulation ratio and COP. Experiments also show that at low heat source temperature, cooling water temperature has strong influence on circulation ratio but does not affect COP significantly. Preferably, cooling water should first flow through the condenser and then through the absorber in order to achieve improved overall performance.

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Pages: 465-476

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Details

  • Original title: Performance of an HCFC-22-based vapour absorption refrigeration system.
  • Record ID : 1997-2111
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 18 - n. 7
  • Publication date: 1995/09

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