新型热源塔溶液再生系统性能优化分析与实验研究

Energy-saving analysis and experimental study of a new heat-source tower solution regeneration system

针对热源塔热泵系统冬季运行时存在的溶液稀释问题,提出了一种基于真空沸腾冷凝的新型热源塔溶液再生系统,并构建了相应的实验台。实验测试结果表明:随着溶液浓度的增加,溶液再生速率和再生效率存在先增加后降低的趋势,在乙二醇质量浓度为26%时达到最大;系统真空压力的增加可以极大提高溶液再生效率和再生速率,但其运行可靠性受到影响;进口溶液温度在36℃且电加热出口阀门开启时间为12 s时存在溶液再生效率的最大值。该溶液浓缩装置正常运行时溶液再生效率可达到3.40 kg/(k W·h)以上,溶液再生速率可达到550 kg/d,与传统的溶液再生相比,具有很好的节能性。

The heat-source tower heat pump system has the problem of solution dilution when it operates in winter. A solution regeneration design of heat-source tower based on vacuum boiling and condensation integration is proposed, and experimental tests are constructed. The results show that： with the increase of solution concentration, regeneration efficiency and regeneration rate have the trend of increasing first and then decreasing later, and have the best data at the ethylene glycol concentration of 26%. With the increase of vacuum value, regeneration efficiency and regeneration rate increase greatly, but the reliability of system can be decreased. With the inlet solution temperature of 36℃, and with electric heater outlet valve open time 12 s, regeneration efficiency and regeneration rate can be reached to the best. In the normal time, regeneration efficiency can be higher than 3.40 kg/（k W·h） and regeneration rate can be higher than 550 kg/d. Compared with traditional solution regeneration, the energy-saving potential is huge.