Abstract:

Air-cooled absorber and condenser is one of the most significant methods to reduce the bulk volume of absorption refrigeration system and to extend its range of application.In this paper，lumped parameter model for four double-effect air-cooled lithium bromide absorption refrigeration cycles was developed to analyze effects of varying heat reservoir temperature，cooling air temperature and evaporation temperature on system performance.The simulated result indicated that increased temperature of heat reservoir is essential to the air-cooled absorption system，and coefficient of performance of the cycle with parallel solution flow in which solution flow is distributed prior to low temperature solution heat exchanger is much lower than that of the other three cycles，thereby is unfit for absorber and condenser to be air cooled.