Performance of Coupled High-Temperature Heat Pump with Steam Supply Through Long-Distance Hot-Water Pipeline

Huang Guohua; Jiang Yi; Li Yanan; Zhao Jinzi; Xie Xiaoyun

doi:10.12465/issn.0253-4339.20250613001

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Performance of Coupled High-Temperature Heat Pump with Steam Supply Through Long-Distance Hot-Water Pipeline

更新时间：2026-08-06

- Performance of Coupled High-Temperature Heat Pump with Steam Supply Through Long-Distance Hot-Water Pipeline
  增强出版
- Journal of Refrigeration Vol. 47, Issue 4, Pages: 36-44(2026)
- 作者机构：
  
  1.清华大学建筑节能研究中心北京 100084
  2. 同方节能工程技术有限公司北京 100083
- 作者简介：
- 基金信息：
  
  the National Key Research and Development Program of China(2024YFC3810002)
- DOI：10.12465/issn.0253-4339.20250613001
  CLC： TB657.5;TK123
- CSTR：XXXXX.XX.XXX.20250613001
- Received：13 June 2025，
  
  Revised：2025-08-18，
  
  Accepted：19 August 2025，
  
  Published：16 August 2026
- 稿件说明：
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黄国华,江亿,李亚南等.热水长输供蒸汽吸收-压缩耦合高温热泵性能研究[J].制冷学报,2026,47(04):36-44.

Huang Guohua,Jiang Yi,Li Yanan,et al.Performance of Coupled High-Temperature Heat Pump with Steam Supply Through Long-Distance Hot-Water Pipeline[J].Journal of Refrigeration,2026,47(04):36-44.
黄国华,江亿,李亚南等.热水长输供蒸汽吸收-压缩耦合高温热泵性能研究[J].制冷学报,2026,47(04):36-44. DOI： 10.12465/issn.0253-4339.20250613001. CSTR： XXXXX.XX.XXX.20250613001.

Huang Guohua,Jiang Yi,Li Yanan,et al.Performance of Coupled High-Temperature Heat Pump with Steam Supply Through Long-Distance Hot-Water Pipeline[J].Journal of Refrigeration,2026,47(04):36-44. DOI： 10.12465/issn.0253-4339.20250613001. CSTR： XXXXX.XX.XXX.20250613001.

摘要

针对热电联产热水长输末端高效制蒸汽应用场景，本文将吸收式换热器与高温蒸汽热泵相结合，提出了一种新型吸收-压缩耦合高温热泵循环系统，建立了系统热力学模型，分析了一次网供水温度、微压蒸汽温度、蒸汽供给温度等参数对耦合高温热泵性能的影响。结果表明：一次网供水温度越高，吸收式换热器提升温度的能力越大，耦合系统COP越大，单位蒸汽耗电量越小。随着微压蒸汽的温度由75 ℃增至100 ℃，耦合系统COP先增大后减小，单位蒸汽耗电量先减小后增大。当微压蒸汽温度为80 ℃时，耦合系统COP为最大值2.6，单位蒸汽耗电量为最小值285.3 kW∙h/（t/h）。随着蒸汽供应温度的升高，耦合系统COP单调减小，单位蒸汽耗电量单调升高。当蒸汽供给温度由100 ℃升至200 ℃时，耦合系统COP由4.3降至2.3，单位蒸汽耗电量由166.2 kW∙h/（t/h）升至316.0 kW∙h/（t/h）。

Abstract

Objective

Combined heat and power centralized heating can supply steam to surrounding industrial enterprises by using the steam from turbine， which is an efficient way of steam supply. However， as the supply distance increases， the temperature drop and pressure loss of the steam become severe. This study aims to propose a new absorption-compression coupled high-temperature heat pump cycle system， which uses the existing combined heat and power pipeline network to transport hot water and generates steam at the user site， effectively expanding the coverage of combined heat and power steam supply. In this paper， a thermodynamic simulation model of the heat pump system is established， and the influences of the supply water temperature of the primary network， the temperature of the micro-pressure steam， and the steam supply temperature on the performance of the heat pump are analyzed in detail.

Methods

This study combines the absorption heat exchanger with the vapor compression heat pump， and proposes an absorption-compression coupled high-temperature heat pump cycle system. This paper uses theoretical simulation methods to analyze the influence of key parameters on the performance of the heat pump system. Based on the principles of energy conservation and mass conservation， the thermodynamic steady-state model of the system is established， and the thermodynamic equations are solved using the engineering equation solver （EES） software. Through parameter sensitivity analysis， the effects of the supply water temperature of the primary network， the micro-pressure steam temperature， and the steam supply temperature on the system performance are studied.

Results and Discussions　The higher the supply temperature of the primary network， the greater the capacity of the absorption heat exchanger to increase the temperature， the larger the COP of the coupled system， and the lower the unit steam consumption. When the supply water temperature is 120 ℃ and the steam generated is 180 ℃， the temperature rise coefficient of the absorption heat exchanger is 0.37. The coupled system COP is 2.56， and the unit steam consumption is 292.5 kW∙h/（t/h）. Compared with the case where the supply water temperature is 95 ℃， the COP increases by 2.7%， and the unit steam consumption decreases by 2.5%. As the temperature of the micro-pressure steam increases from 75 ℃ to 100 ℃， the COP of the coupled system first increases and then decreases， and the unit steam consumption first decreases and then increases. When the temperature of the micro-pressure steam is 80 ℃， the COP of the coupled system is the maximum value of 2.6， and the unit steam consumption is the minimum value of 285.3 kW∙h/（t/h）. As the steam supply temperature increases， the COP of the coupled system monotonically decreases， and the unit steam consumption monotonically increases. When the steam supply temperature increases from 100 ℃ to 200 ℃， the COP of the coupled system decreases from 4.3 to 2.3， and the unit steam consumption increases from 166.2 kW∙h/（t/h） to 316.0 kW∙h/（t/h）.

Conclusions

The absorption-compression coupled high-temperature heat pump system proposed in this paper provides an effective solution for long-distance hot water supply to steam. The supply water temperature of the primary network， the micro-pressure steam temperature， and the steam supply temperature are the key factors affecting the system performance. This system offers a feasible approach for expanding the steam supply range of combined heat and power and improving the comprehensive energy utilization rate.

关键词

Keywords

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