北方村镇公共建筑太阳能-空气源热泵耦合供热系统研究

Research on solar-air source heat pump coupling heating system for public buildings in northern villages and towns

针对北方村镇公共建筑在利用太阳能和空气源供暖时存在的空气源热泵低温运行效率低和太阳能辐射不稳定问题,提出适用于北方村镇公共建筑的供热系统。以严寒C区沈阳为例,通过DeST软件对目标建筑进行热负荷计算,借助Trnsys仿真平台对单一空气源热泵系统和耦合供热系统进行对比分析。结果显示:空气源模式基本仅在12月、次年1月和次年2月参与供暖,平均性能系数(COP)为2.16,比系统平均COP(2.73)和太阳能热泵供热模式平均COP(3.52)低;耦合供热系统COP值是单一空气源热泵系统的1.22倍。与单一空气源热泵系统相比,耦合供热系统具有明显的优越性。

Aiming at the problems of low efficiency of air source heat pump at low temperature and unstable solar radiation when using solar energy and air source for heating public buildings in northern villages and towns,a heating system suitable for public buildings in northern villages and towns is proposed.Taking Shenyang in severe cold area C as an example,the heat load of the target building is calculated by DeST software,and the single air source heat pump system and the coupled heating system are compared and analyzed by Trnsys simulation platform.The results show that the air source mode basically only participates in heating in December,January and February,and the average COP is 2.16,which is lower than the average COP(2.73)of the system and the average COP(3.52)of the solar heat pump heating mode.The COP value of the coupled heating system is 1.22 times that of the single air source heat pump system.Compared with a single air source heat pump system,the coupled heating system has obvious advantages.