严寒地区地埋管地源热泵系统设计及运行优化
Designing and operating optimization of ground-source heat pump system in severe cold area
摘要：
对某地埋管地源热泵系统冬季供热工况进行了优化实验。结果表明，系统连续运行时，6 h后机组和地埋管换热器达到稳定状态，地埋管换热器单位埋深的取热量为24.5W/m；系统间歇运行时，土壤温度能及时恢复，系统的COP提高4.34%，机组的COP提高3.23%，2台压缩机工作时系统和机组的COP值最大，比4台压缩机工作时分别高12.2%和11%，2台压缩机运行、循环泵采用变频控制时，系统COP提高了12.5%；3台压缩机运行、循环泵采用变频控制时，系统COP提高了6.42%。
Abstract：
Makes a heating condition optimizing experiment for a ground-source heat pump system, and the results show that heat pump and underground heat-exchanger reach steady-state after 6 hours and heat absorption of underground heat-exchanger per meter depth is 24.5 W/m under the continuous operation condition; the ground temperature can restore in time; the COP of the system is increased by 4.34% and the COP of the heat pump is increased by 3.23%; the COP of the system and heat pump are highest when two compressors operating, respectively are 12.2% and 11%higher than that of four compressors; the COP of the system is increased by 12.5% when two compressors operate and the circulating pumps adopt the inverter control and the COP of the heat pump is increased by 6.42% when three compressors operate and the circulating pumps adopt the inverter control under intermittent operation condition.
Keywords:ground-source heat pump, operating optimization, underground heat exchanger, variable frequency control