低负荷率工况下地源热泵系统的运行性能分析  

Performance analysis on ground source heat pump system at low load

作　　者：董艳芳 曾召田[2] 朱辉[1] 刘岩[1] 梁秒梦 DONG Yanfang;ZENG Zhaotian;ZHU Hui;LIU Yan;LIANG Miaomeng(College of Energy Engineering and Building Environment,Guilin University of Aerospace Technology,Guilin 541004,China;College of Civil Engineering and Architecture,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]桂林航天工业学院能源与建筑环境学院,广西桂林541004 [2]桂林理工大学土木与建筑工程学院,广西桂林541004

出　　处：《热科学与技术》2021年第4期348-356,共9页Journal of Thermal Science and Technology

基　　金：国家自然科学基金资助项目(51568014);广西中青年教师基础能力提升资助项目(2017KY0259)。

摘　　要：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30.00%及机组负荷率大于80.00%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、冬两季节的节能率分别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。Taking the demonstration project of a ground source heat pump system under karst geological conditions in Guilin as the research object, according to the rank of importance of influencing factors, the actual operation performance of the system under extremely low load rate condition was mainly analyzed based on the measured data in 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 <30.00% or high load rate >80.00%, and the power consumption ratio of unit and pump meets the energy consumption requirements of transmission and distribution system. The average refrigeration performance coefficient of the heat pump unit is 4.48 and the average system refrigeration energy efficiency ratio is 3.59 in July. The average heating performance coefficient of the heat pump unit is 4.26 and the average system heating energy efficiency ratio of the ground source heat pump system is 3.32 in January. The energy saving rate of the ground source heat pump system in summer and winter is as high as 30.72% and 35.93%, respectively. The energy saving effect of ground source heat pump system is remarkable, which is worth popularizing and applying in Guilin area.

关 键 词：地源热泵系统 系统负荷率 机组性能系数 系统能效比 节能率 

分 类 号：TU831.6[建筑科学—供热、供燃气、通风及空调工程]