G314 AN EXERGY ANALYSIS OF THE LiBr-WATER TRIPLE-EFFECT ABSORPTION-TYPE REFRIGERATOR(Absorption heat pump)

概要

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It is important to use the waste heat efficiently for energy saving. An absorption cycle is efficient as the thermal utilizing equipment of the waste heat. In order to improve the performance of absorption cycle for the various operating conditions, it is important to analyze the exergy loss in each component and evaluate not only the quantity but also the quality of heat flow. This paper deals with the performance characteristics of the triple-effect LiBr-water absorption refrigerating system. Moreover, the hybrid system with a steam compressor at the exit of the low temperature regenerator is proposed to decrease the solution temperature in a high temperature regenerator, and the performance of the hybrid system was evaluated. As a result, it was shown that there was an optimum condition on the exergy coefficient and the COP of the triple-effect absorption cycle, and that values were about 181 % and 29.3 %, respectively. By the adoption of the hybrid system, the solution temperature in the high temperature regenerator can be reduced from 222 ℃ to 189 ℃. In that case, the COP decreased to about 173 %, but the exergy efficiency increased to 31.9 % due to decrease in the temperature of the heat source.
一般社団法人日本機械学会の論文
2000-10-01