增压吸收对土壤源吸收式热泵性能影响的模拟分析

摘要

Due to the fact that the performance of ground source absorption heat pump (GSAHP)is sensitive to the temperature of the secondary network backwater,compression-assisted absorption cycles by compressor were proposed in this study to improve the performance of GSAHP under high temperatures.The influence of compression-assisted absorption on the performance of GSAHP was analyzed this study by using LiBr-H2 O as working fluid.the author simulates and analyses.The results showed that compression-assisted absorption can effectively reduce the concentration of weak solution in the absorption heat pump and increase the temperature of the secondary network backwater.It can alsodecrease the temperature of driven heat-source.In addition,with the increase of pressure ratio,the primary energy efficiency of GSAHP gradually decreases.%针对土壤源吸收式热泵的性能对供热二次网回水温度较为敏感，提出采用压缩机增压的方式来提高吸收式热泵的吸收压力，进而提高土壤源吸收式热泵的高温性能。以 LiBr-H2 O 为工质对，模拟分析增压吸收对土壤源吸收式热泵高温性能的影响。结果表明，增压吸收可以有效降低吸收式热泵稀溶液的浓度，进而可以提高二次网回水温度，降低吸收式热泵的驱动热源温度。同时，随着增压比的升高，土壤源吸收式热泵供热系统的一次能源利用效率不断下降。