储能科学与技术 ›› 2025, Vol. 14 ›› Issue (10): 3774-3784.doi: 10.19799/j.cnki.2095-4239.2025.0293

• 储能系统与工程 • 上一篇    下一篇

基于中间工况寻优的复叠式高温热泵蒸汽系统性能研究

胡智辉1(), 姜志鹏2, 李帅旗2(), 林文野2, 宋文吉2, 冯自平2   

  1. 1.深圳市燃气集团股份有限公司，广东 深圳 518000
    2.中国科学院广州能源研究所，广东 广州 510640
  • 收稿日期:2025-03-27 修回日期:2025-04-22 出版日期:2025-10-28 发布日期:2025-10-20
  • 通讯作者: 李帅旗 E-mail:huzh103@szgas.com.cn;lisq@ms.giec.ac.cn
  • 作者简介:胡智辉（1985—），男，博士，研究方向为工业/城市热力供应技术，E-mail：huzh103@szgas.com.cn；
  • 基金资助:
    广州市重点研发项目(2025B03J0023)

Performance of a cascade high-temperature heat pump steam system based on intermediate optimization of operating conditions

Zhihui HU1(), Zhipeng JIANG2, Shuaiqi LI2(), Wenye LIN2, Wenji SONG2, Ziping FENG2   

  1. 1.Shenzhen Gas Group Co. , Shenzhen 518000, Guangdong, China
    2.Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China
  • Received:2025-03-27 Revised:2025-04-22 Online:2025-10-28 Published:2025-10-20
  • Contact: Shuaiqi LI E-mail:huzh103@szgas.com.cn;lisq@ms.giec.ac.cn

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摘要：

本工作提出复叠式高温热泵与蒸汽压缩机耦合的蒸汽制备系统，采用R134a、R245fa及R718分别作为低温级、高温级和蒸汽级工质，以中间工况动态寻优为基础探究环境温度-15~40 ℃与蒸汽出口温度140~170 ℃的热力性能，并搭建实验平台对仿真数据进行验证。研究表明：基于动态寻优模型发现，随着中间蒸汽温度上升，喷液率下降，最佳低温级冷凝温度上升。蒸汽出口温度为170 ℃，环境温度由-15 ℃上升到40 ℃，系统COP从1.183上升至1.914。环境温度为20 ℃，蒸汽出口温度由140 ℃上升到170 ℃，系统COP从1.945下降至1.657，蒸汽产量也从0.856 t/h上升至1.170 t/h。通过实验发现在蒸汽出口温度为170 ℃和环境温度为23~27 ℃的工况下，系统COP较理论值下降3%~5%，总功率较理论值低8%~12%。对仿真和试验的性能指标进行误差分析，发现最大误差集中于复叠热泵功率(13.29%)与总功率(10.01%)。

关键词: 高温热泵蒸汽系统, 中间工况寻优, 启动过程, 性能研究, 误差分析

Abstract:

A steam-generation system integrating a cascade high-temperature heat pump with a vapor-compression machine is presented in this study. The system utilizes R134a, R245fa, and R718 refrigerants as working fluids for the low-temperature, high-temperature, and steam stages, respectively. Based on the dynamic optimization of intermediate conditions, the thermodynamic performance of the system is investigated at environmental temperatures ranging from -15 ℃ to 40 ℃ and steam-outlet temperatures from 140 ℃ to 170 ℃. Thereafter, an experimental platform is constructed to validate the simulation data. The results, based on the dynamic optimization model, reveal that as the intermediate-steam temperature increases, the spray rate decreases, and the optimal low-temperature-stage condensation temperature increases. At a steam-outlet temperature of 170 ℃, the system coefficient of performance (COP) increases from 1.183 to 1.914 as the environmental temperature rises from -15 ℃ to 40 ℃. At an environmental temperature of 20 ℃, as the steam-outlet temperature increases from 140 ℃ to 170 ℃, the system COP decreases from 1.945 to 1.657, whereas the steam output increases from 0.856 to 1.170 t/h. The experimental results reveal that at a steam outlet temperature of 170 ℃ and environmental temperatures between 23 ℃ and 27 ℃, the system COP and total power are 3%—5% and 8%—12% lower than the theoretical values, respectively. Error analysis of the simulation and experimental performance indicators reveals that the largest errors are concentrated in the cascade heat pump power (13.29%) and total power (10.01%).

Key words: high-temperature heat pump steam system, optimization of intermediate operating conditions, start-up process, performance studies, error analysis

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