A study of the characteristics of heat transfer for an ammonia-water bubble mode absorber in absorption heat pump systems

absorber is a major component in absorption refrigeration systems and its performance greatly affectsthe overall system performance. In this study, experimental analyses of the characteristics of heat transfer for removal ofabsorption heat in an ammonia-water bubble mode absorber were performed. The heat transfer coeficient was es-timated as a function of the input gas flow rate, solution flow rate, temperature, concentration, absorber diameter andheight, and input flow direction. The increase of gas and solution flow rate affects positively in heat transfer. However,the increase of solution temperature and concentration affects negatively. Moreover, under the same Reynolds num-ber, countercurrent flow is superior to cocurrent flow in heat transfer performance. In adition, from these experimentaldata, empirical corelations that can explain easily the characteristics of heat transfer are derived. KCI Citation Count: 0