提出一种基于盐溶液储能的热回收型热泵（SEHHP）系统,由热回收型压缩热泵子系统和盐溶液储/释热子系统组成,夜间电力低谷时段利用富裕电能驱动热泵子系统实现盐溶液与相变材料耦合储存热能,白天供热时段,电能驱动空气源热泵子系统与盐溶液储/释热子系统构成热泵复叠循环制取供热量,从而有效降低社会用电高峰期供热的电力消耗。建立SEHHP系统的热力学模型,评估SEHHP系统的逐时制热性能与经济性。结果表明：SEHHP系统的制热性能与经济性均优于相变储能空气源热泵（PEAHP）系统,其日能耗比PEAHP系统降低34.18%。与PEAHP系统相比,SEHHP系统的综合制热性能系数（CCOP）提高52.20%,而其费用年值降低9.23%。该系统适用于电力峰谷差大的供热地域或场所。
Abstract
A salt solution-based energy-storage heat-recovery heat pump （SEHHP） system is proposed in this paper, which consists of a heat-recovered compression heat pump subsystem and solution-based heat storage/release subsystem. At power-valley hours,the air source heat pump subsystem is used to convert electric energy to chemical energy which is stored in salt solution and phase change material. During the heating hours, the cascaded heat pump system, where air source heat pump subsystem is cascaded with the salt solution-based heat storage/release subsystem, is used for space heating, and helps decrease the total electricity consumption for heating at power-peak hours. The thermodynamic model of SEHHP system is developed to compare the hourly heating performance of SEHHP with phase-change energy-storage air-source heat pump （PEAHP） system,and the economy for the two systems are evaluated. The results show that the heating performance and economy of SEHHP system are better than that of PEAHP system. The daily energy consumption of SEHHP system is 34.18% lower than that of PEAHP system,and the comprehensive heating performance coefficient （CCOP） of SEHHP system is increased by 52.20%,as compared with PEAHP system,while the annual cost of SEHHP system is reduced by 9.23%. The proposed system is suitable for the heating areas with large difference between peak and valley power price.
关键词
热回收 /
热泵 /
溶液储能 /
性能系数 /
经济性分析
Key words
heat recovery /
heat pump /
solution energy storage /
heating coefficient of performance（CCOP） /
economic analysis
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基金
国家自然科学基金（52376005; 52378094）; 河南省科技攻关项目（232102321092）; 河南省高效科技创新团队（22IRTSTHN006）
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