CIESC Journal ›› 2023, Vol. 74 ›› Issue (S1): 329-337.DOI: 10.11949/0438-1157.20221620

• Energy and environmental engineering • Previous Articles     Next Articles

Study on the cycle performance of salt solution-storage-based heat pump

Minghui CHANG(), Lin WANG(), Jiajia YUAN, Yifei CAO   

  1. Institute of Building Energy and Thermal Science, Henan University of Science and Technology, Luoyang 471023, Henan, China
  • Received:2022-11-15 Revised:2022-12-25 Online:2023-09-27 Published:2023-06-05
  • Contact: Lin WANG


常明慧(), 王林(), 苑佳佳, 曹艺飞   

  1. 河南科技大学建筑能源与热科学技术研究所,河南 洛阳 471023
  • 通讯作者: 王林
  • 作者简介:常明慧(1998—),女,硕士研究生,
  • 基金资助:


In order to solve the problem of electricity demand peak and valley in heating period, a solution-based energy-stored heat pump (SEHP) is proposed, which is composed of compression heat pump subsystem and salt solution subsystem with energy storage and release to realize thermal storage and thermal grade improvement. The multi-layer liquid storage units are used to optimize the design of salt solution storage tank to improve the energy storage density. Based on the thermodynamic model of the new cycle, the effect of key operating parameters on the performance of SEHP are studied, and its economy makes comparisons with that of the air-source energy-stored heat pump (AEHP) and the air-source heat pump (ASHP). The results show that the comprehensive heating coefficient of performance (CCOP) of the new cycle is lower than that of AEHP and ASHP, but its energy storage density (ESD) and economy are better than those of the two conventional heat pumps. At 300 kW heating load, although CCOP of SEHP is 4.76% lower than that of AEHP, ESD of SEHP is 2.2 times higher than that of AEHP, while the annual cost of AEHP is 1.46% and 29.00% lower than that of AEHP and ASHP respectively.

Key words: thermodynamics, salt solution, energy storage, heat pump, coefficient of performance, economy


为解决供热采暖期的电力峰谷问题,提出了盐溶液蓄能型热泵循环,由压缩热泵子系统与盐溶液储释能子系统构成复叠循环实现热能储存与品位提升,利用多层储液思想设计盐溶液储罐结构提升蓄能密度。在建立新循环热力学数学模型的基础上,研究关键运行参数对新循环的性能影响,并评估比较了新循环、传统空气源蓄能热泵和空气源热泵的经济性。研究结果表明:新循环综合制热性能系数低于传统空气源蓄能热泵及空气源热泵,但其蓄能密度和经济性均优于传统两种热泵循环。在300 kW供热量设计负荷下,新循环综合制热性能系数较传统空气源蓄能热泵降低4.76%,但新循环蓄能密度是传统空气源蓄能热泵的2.2倍,而新循环费用年值较传统空气源热泵及空气源蓄能热泵分别降低1.46%和29.00%。

关键词: 热力学, 盐溶液, 蓄能, 热泵, 性能系数, 经济性

CLC Number: