Thermal Performance and Economic Analysis of Low-Temperature Waste Heat Heating Systems

Wu Yuanbing; Gao Feng; Xu Rongji; Luo Jinglun; Li Gaochao

doi:10.12465/issn.0253-4339.20251224002

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Thermal Performance and Economic Analysis of Low-Temperature Waste Heat Heating Systems

更新时间：2026-04-27

- Thermal Performance and Economic Analysis of Low-Temperature Waste Heat Heating Systems
- Journal of Refrigeration Pages: 1-9(2026)
- 作者机构：
  
  1.北京建筑大学环境与能源工程学院北京 100084
  2. 北京建筑大学建筑用能国家级虚拟仿真实验教学中心北京 100084
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(51506004)
- DOI：10.12465/issn.0253-4339.20251224002
  CLC： TU833;TB61⁺1
- Received：24 December 2025，
  
  Revised：2026-01-16，
  
  Accepted：03 February 2026，
  
  Online First：27 April 2026，
- 稿件说明：
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吴媛兵,高峰,徐荣吉等.低温余热供暖系统热力性能及经济性分析[J].制冷学报,

Wu Yuanbing,Gao Feng,Xu Rongji,et al.Thermal Performance and Economic Analysis of Low-Temperature Waste Heat Heating Systems[J].Journal of Refrigeration,
吴媛兵,高峰,徐荣吉等.低温余热供暖系统热力性能及经济性分析[J].制冷学报, DOI：10.12465/issn.0253-4339.20251224002.

Wu Yuanbing,Gao Feng,Xu Rongji,et al.Thermal Performance and Economic Analysis of Low-Temperature Waste Heat Heating Systems[J].Journal of Refrigeration, DOI：10.12465/issn.0253-4339.20251224002.

摘要

在“双碳”目标背景下，为实现高压直流输电换流阀产生的低温余热高效回收与再利用，本文以R515b为系统工质，通过建立热力学模型与㶲分析模型，结合实验测试，对比研究了蒸发压缩式热泵与喷射压缩式热泵在不同蒸发温度和冷凝温度下的热力学性能变化规律，并进行了经济性分析。结果表明：喷射压缩式热泵性能（COP）较蒸发压缩热泵平均提升8.75%，压缩机功耗降低4.78%，系统制热量提升3.50%；喷射压缩热泵总㶲损主要集中于冷凝器、喷射器，分别占32.6%、27%。经济性方面，喷射压缩热泵系统净现值比蒸发压缩热泵系统提高约10.9%，动态回收期为4.08年。研究结果表明，喷射压缩式热泵能够有效回收膨胀损失，提高系统能效与经济性，为换流阀余热回收提供了一种高效且经济的方案系统。

Abstract

Against the backdrop of the "dual carbon" goals， in this study we aimed to achieve efficient recovery and reuse of low-grade waste heat generated by high-voltage direct current （HVDC） converter valves. Using R515b as the system refrigerant， thermodynamic models and economic models were established. Through experimental testing， the thermodynamic performance variations and economic analysis of evaporative compression heat pumps versus ejector compression heat pumps were compared at different evaporation and condensation temperatures. The results indicate that the COP of the injection compression heat pump was， on average， 8.75% higher than that of the vapor compression heat pump， with the compressor power consumption reduced by 4.78% and the system heating capacity increased by 3.50%. The total friction losses in the injection compression heat pump were primarily concentrated in the condenser and injector， accounting for 32.6% and 27%， respectively. Economically， the net present value of the injection compression heat pump system increased by approximately 10.9% compared to traditional systems， with a dynamic payback period of 4.08 years. The results show that injection compression heat pumps effectively recover expansion losses， enhance the system energy efficiency and economic performance， and provide an efficient and economical solution for recovering waste heat from inverter valves.

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