压缩式热泵回收燃气锅炉烟气余热性能的研究

杜勇博; 李雨航; 王振川; 卢海刚; 徐琼; 卢洁; 车得福

doi:10.7652/xjtuxb202608010

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压缩式热泵回收燃气锅炉烟气余热性能的研究

更新时间：2026-07-28

- 压缩式热泵回收燃气锅炉烟气余热性能的研究
- Performance of a Compression Heat Pump for Waste Heat Recovery from Gas-Fired Boiler Flue Gas
- 西安交通大学学报 2026年60卷第8期页码：112-122
- 作者机构：
  
  西安交通大学能源与动力工程学院，710049，西安
  中国特种设备检测研究院，100029，北京
  方快锅炉有限公司，455099，河南安阳
- 作者简介：
  
  作者简介：杜勇博（1990-），男，副教授；
  车得福（通信作者），男，教授，博士生导师。
- 基金信息：
  
  陕西省重点研发计划资助项目(2023-YBGY-287);国家市场监管总局科技计划资助项目(2023MK209)
- DOI：10.7652/xjtuxb202608010
  中图分类号： TK229.8
- 收稿：2025-11-06，
  
  网络首发：2026-04-14，
  
  纸质出版：2026-08-10
- 稿件说明：
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杜勇博, 李雨航, 王振川, 等. 压缩式热泵回收燃气锅炉烟气余热性能的研究[J]. 西安交通大学学报, 2026,60(8):112-122.

DU Yongbo, LI Yuhang, WANG Zhenchuan, et al. Performance of a Compression Heat Pump for Waste Heat Recovery from Gas-Fired Boiler Flue Gas[J]. Journal of Xi'an Jiaotong University, 2026, 60(8): 112-122.
杜勇博, 李雨航, 王振川, 等. 压缩式热泵回收燃气锅炉烟气余热性能的研究[J]. 西安交通大学学报, 2026,60(8):112-122. DOI： 10.7652/xjtuxb202608010.

DU Yongbo, LI Yuhang, WANG Zhenchuan, et al. Performance of a Compression Heat Pump for Waste Heat Recovery from Gas-Fired Boiler Flue Gas[J]. Journal of Xi'an Jiaotong University, 2026, 60(8): 112-122. DOI： 10.7652/xjtuxb202608010.

摘要

为解决燃气锅炉在实际运行中，变化负荷导致烟气参数与热泵循环工质特性不匹配的问题，研究了压缩式热泵回收燃气锅炉烟气的余热性能。搭建了用于7 MW卧式天然气真空锅炉烟气余热回收系统的热泵系统，运用实验与流程模拟相结合的方法，在100%、75%和50%负荷下，研究了锅炉热泵工质的流量、压比与负荷对系统性能的影响。研究结果表明：在100%负荷下，随着制冷剂流量的升高，热泵余热回收量先增大，而后基本不变，性能系数（COP）由7.08下降至5.94，系统效率先迅速升高至106.8%后缓慢下降。在高压侧压力升高时，热泵COP及效率先下降至1.97与101.1%，再迅速升高至8.09与107.2%，随后又下降至5.56与106.4%。锅炉负荷的变化会改变余热回收量达到峰值时，制冷剂流量、COP及效率的最大值，锅炉在满负荷、75%及50%负荷下，热泵最佳运行区间分别为：制冷剂流量大于3.40、2.30、0.68 kg·s

-1

，高压侧压力大于1020、900、820 kPa。该研究可为压缩式热泵回收燃气锅炉余热系统的高效运行提供参考。

Abstract

To address the issue of mismatches between flue gas parameters and heat pump cycle working fluid characteristics caused by varying loads during the actual operation of gas-fired boilers

the performance of a compression heat pump for waste heat recovery from gas-fired boiler flue gas was investigated. A heat pump system was constructed as part of the flue gas waste

heat recovery system of a 7 MW horizontal natural gas vacuum boiler. By combining experimental and process simulation methods

the effects of the heat pump refrigerant flow rate

pressure ratio

and boiler load on system performance were studied under boiler loads of 100%

75%

and 50%. The research results show that at 100% load

as the refrigerant flow rate increases

the waste heat recovery capacity of the heat pump initially increases and then plateaus

the coefficient of performance (COP) decreases from 7.08 to 5.94

and the system efficiency first rises rapidly to 106.8% and then declines gradually. As the high-side pressure increases

the COP and efficiency of the heat pump first drop to 1.97 and 101.1%

respectively

then rise rapidly to 8.09 and 107.2%

respectively

and subsequently fall to 5.56 and 106.4%

respectively. Changes in boiler load affect the refrigerant flow rate at which the waste heat recovery capacity reaches its peak

as well as the maximum values of COP and efficiency. Under boiler loads of 100%

75%

and 50%

the optimal operating conditions for the heat pump are as follows:refrigerant flow rates exceeding 3.40

2.30

and 0.68 kg·s

-1

respectively

and high-side pressures exceeding 1020

900

and 820 kPa

respectively. This study provides a reference for the efficient operation of compression heat pump waste heat recovery systems for gas-fired boilers.

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