Performance evaluation and comparison of novel combined power cycles consisting of partial pre-heating supercritical carbon dioxide power cycle and different absorption power cycles for waste heat recovery

HU Hao; GUO Qianxin; YANG Li; YU Xiaobing; XUE Chenxi; LIU Yonglin; XUE Yanping; YANG Qingchuan; GU Yuheng

doi:10.19666/j.rlfd.202403018

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Performance evaluation and comparison of novel combined power cycles consisting of partial pre-heating supercritical carbon dioxide power cycle and different absorption power cycles for waste heat recovery

Thermal Power Generation Vol. 53, Issue 7, Pages: 101-111(2024)

更新时间：2025-09-28

- Performance evaluation and comparison of novel combined power cycles consisting of partial pre-heating supercritical carbon dioxide power cycle and different absorption power cycles for waste heat recovery
- 作者机构：
  
  1. 神华神东电力有限责任公司技术研究院
  2. 西安热工研究院有限公司
  3. 西安西热节能技术有限公司
  4. 神华神东电力有限责任公司店塔电厂
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202403018
  CLC： TM61
- Published：2024
- 稿件说明：
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HU Hao, GUO Qianxin, YANG Li, et al. Performance evaluation and comparison of novel combined power cycles consisting of partial pre-heating supercritical carbon dioxide power cycle and different absorption power cycles for waste heat recovery[J]. Thermal Power Generation, 2024, 53(7): 101-111.
DOI：

HU Hao, GUO Qianxin, YANG Li, et al. Performance evaluation and comparison of novel combined power cycles consisting of partial pre-heating supercritical carbon dioxide power cycle and different absorption power cycles for waste heat recovery[J]. Thermal Power Generation, 2024, 53(7): 101-111. DOI： 10.19666/j.rlfd.202403018.

摘要

部分预热超临界二氧化碳（S-CO_2）动力循环系统被广泛认为是一种很有前途的余热回收方案。提出了以LiBr-H_2O和NH_3-H_2O为工质对的2种部分预热S-CO_2循环系统和吸收式动力循环的联合循环发电系统（部分预热S-CO_2/APC系统）。建立并验证了所提出的部分预热-CO_2/APC系统的热力学模型。基于单目标和多目标优化结果，从热力学和经济学角度比较了所提出的S-CO_2/APC系统与单一S-CO_2系统的性能。单目标优化结果表明，与单一S-CO_2系统相比，S-CO_2/LiBr-H_2O系统和S-CO_2/NH_3-H_2O系统的净输出功和净效率分别提高了7.40%和4.30%。多目标优化结果表明，S-CO_2/LiBr-H_2O系统和S-CO_2/NH3-H_2O系统的净效率分别提高了7.94%和5.13%，单位投资成本分别提高了12.35%和9.02%，表明S-CO_2/LiBr-H_2O系统具有较大的发展潜力。?损分析结果表明，?损主要存在于冷却器和加热器中，所提出的S-CO_2/APC系统可以显著降低单一S-CO_2系统冷却器约45%的?损。

Abstract

Partial heating supercritical carbon dioxide(S-CO_2) power cycle system is proven to be one promising option for waste heat recovery. By using LiBr-H_2O and NH3-H_2O as working fluids

two types of novel combined power systems consisting of a parting pre-heating S-CO_2 cycle and different absorption power cycle(APC)systems are proposed. The detailed mathematical models of the proposed parting heating S-CO_2/APC systems are built and verified. Based on the results of single-and multi-objective optimization

the performances of the proposed S-CO_2/APC system and the standalone S-CO_2 system are compared from the perspective of thermodynamics and economics. The single-objective optimization study reveals that the net power output and net efficiency of the S-CO_2/LiBr-H_2O system and the S-CO_2/NH_3-H_2O system increases by 7.40% and 4.30%

respectively

compared with the standalone S-CO_2 system. The multi-objective optimization results show that

the S-CO_2/LiBr-H_2O system and S-CO_2/NH_3-H_2O system can obtain improvements of 7.94% and 5.13% in net efficiency as well as promotion of 12.35% and 9.02% in the specific investment cost respectively

indicating that the S-CO_2/Li Br-H_2O system has a greater potential. Exergy loss analysis reveals that the main exergy loss exists in the coolers and the heaters

and the proposed S-CO_2/APC systems can significantly reduce the exergy loss in the S-CO_2 cooler by about 45%.

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