基于低负荷率工况下地源热泵系统的运行性能分析

以桂林市岩溶地质条件下某地源热泵系统示范项目为研究对象，基于典型季节运行工况下的实测数据，按照影响因素重要度排序主要研究系统极低负荷率及机组负荷率对地源热泵系统运行效果的影响。研究结果表明：在典型季节系统负荷率低于30%及机组负荷率大于80%工况下地源热泵系统处于良好的运行状态，机组与水泵耗电量占比符合输配系统能耗要求。热泵机组在7月运行期间机组平均制冷性能系数为4.48，平均系统制冷能效比为3.59；1月运行期间机组平均制热性能系数为4.26，平均系统制热能效比为3.32；夏冬季节节能率高达30.72%和35.93%。地源热泵系统的节能效果显著，值得在桂林地区推广应用。

Performance Analysis of Ground Source Heat Pump System Based on Low Load Rate

Taking the demonstration project of a ground source heat pump system under karst geological conditions in Guilin city as the research object, according to the rank of importance of influencing factors, the actual operation effect of the system under extremely low load rate condition was mainly analyzed based on the operation measured data of typical season.The results show that the ground-source heat pump system is in a good operation state under the typical seasonal operating conditions with low load rate<30% in Guilin area, and the power consumption ratio of unit and pump meets the energy consumption requirement of transmission and distribution system. The average refrigeration performance coefficient and the average heating performance coefficient of heat pump unit are 4.48 and 4.26 respectively. And the average refrigeration energy efficiency ratio and the average heating energy efficiency ratioof the ground source heat pump system are 3.59 and 3.32 separately. The energy saving rate of the ground source heat pump system in summer and winter is as high as 30.72% and 35.93%. The energy saving effect of ground source heat pump system is remarkable, which is worth popularizing and applying in Guilin area.