空气源辅助吸收式地源热泵系统性能模拟

Simulation of performance of absorption ground source heat pump system assisted by air source heat pump

针对严寒地区集中供热系统存在能源利用效率低,地源热泵系统存在土壤吸/排热不平衡问题,提出空气源辅助吸收式地源热泵系统（AGSHPS）,该系统采用热管与蒸气压缩式复合的新型空气源热泵热水机组保障系统运行的可靠性。介绍系统的运行模式及运行控制策略,建立各主要部分的数学模型,选取乌鲁木齐地区的某办公建筑为对象,对该系统长期运行特性进行数值模拟。研究结果表明：系统全年综合性能系数约为1.18,相比蒸气压缩式地源热泵系统节能率为12.4%~24.0%,系统全年运行土壤取/排热量的不平衡率为7.8%,系统可保证长期高效稳定运行。

Considering the low energy use efficiency of traditional central heat system in cold regions, in combination with the endothermic/reject heat unbalance of soil in ground source heat pump, an absorption ground source heat pump system （AGSHPS） assisted by air source heat pump was put forward. The separated type heat pipe compounded with vapor compression heat pump air-source hot water unit was proposed to ensure the reliability of AGSHPS. The operation modes and the control strategy of the system were introduced. The mathematic model of main component of system was built, and the numerical simulation of the long term operation performance of the system was carried out for an office building in Urumchi. The results show that the annual overall coefficient of performance is about 1.18. The energy saving rate is 12.4%-24.0%, compared with that of simplex vapor compression type ground source heat pump system. The soil endothermic/reject heat unbalance rate of system is 7.8%, and the system can ensure the high-efficiency and stable operation of the system for a long time.