地源热泵用于高层建筑集中供热水的运行特性

Operation Characteristics of Ground Source Heat Pump for Centralized Hot Water Supply in High-rise Buildings

自主设计了地源热泵热水/空调冷热联供系统和单纯的地源热泵供热水系统,并将其应用于高层建筑中。运用单因素方法,研究循环介质流量等对热泵系统运行特性的影响,确定最佳流量,并通过测试计算系统的能耗。结果表明,在地源热泵热水/空调冷热联供系统中,采用地源制热水时的机组能效比和系统能效比分别为4.7和4.2,冷热联供时的机组综合能效比和系统综合能效比分别为8.63和6.39;系统全年制热水耗电量为6.35 kW.h/m3,与电锅炉加热方式和太阳能+电辅助加热方式相比,可分别节省82.2%和46.7%的电量。在单纯的地源热泵供热水系统中,机组能效比和系统能效比分别为4.8和4.3,全年制热水总耗电量为11.13 kW.h/m3,与电锅炉加热方式和太阳能+电辅助加热方式相比,可分别节省74.69%和24%的电量。由此说明,地源热泵集中供热水系统应用于高层建筑的节能效果显著。

Abstract： A ground source heat pump hot-water/air-conditioning system and a stand-alone ground source heat pump hot-water system were designed and used in high-rise buildings. The influence of circu- lation medium flow on the operation characteristics of heat pump system was studied, the optimal flow was determined, and the energy consumption of the systems was calculated by testing. The results showed that for the ground source heap pump hot-water/air-conditioning system, the unit energy efficiency ratio and the system energy efficiency ratio were 4.7 and 4.2, respectively, when supplying hot water. The unit integrated energy efficiency ratio and the system integrated energy efficiency ratio were 8.63 and 6.39, respectively, when supplying hot water and cooling. The annual power consumption for supplying hot wa- ter was 6.35 kW ·h/m^3, and the power savings were 82.2% and 46.7% compared with electric boiler heating and solar electric heating. For the ground source heat pump hot-water system, the unit energy ef- ficiency ratio and the system energy efficiency ratio were 4.8 and 4.3. The annual power consumption for supplying hot water was 11.13 kW ·h/m^3, and the power savings were 74.69% and 24% compared with electric boiler heating and solar electric heating. It is concluded that ground source heat oumo forcentralized water supply in high-rise buildings has remarkable energy savings.