Performance of combined cooling, heating and power system based on SOFC/GT/TCO<sub>2</sub> integrated power cycle and LiBr-water absorption chiller

LIU Yang; HAN Jitian; YOU Huailiang

doi:10.11949/j.issn.0438-1157.20181102

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Performance of combined cooling, heating and power system based on SOFC/GT/TCO₂ integrated power cycle and LiBr-water absorption chiller

更新时间：2025-12-10

- Performance of combined cooling, heating and power system based on SOFC/GT/TCO₂ integrated power cycle and LiBr-water absorption chiller
- CIESC Journal Issue S2, Pages: 341-349(2018)
- 作者机构：
  
  山东大学能源与动力工程学院,山东,济南,250061
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20181102
  CLC： K172.4TK124
- Online First：31 December 2018，
  
  Published：31 December 2018
- 稿件说明：
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LIU Yang, HAN Jitian, YOU Huailiang. Performance of combined cooling, heating and power system based on SOFC/GT/TCO₂ integrated power cycle and LiBr-water absorption chiller[J]. CIESC Journal, 2018, (S2): 341-349. DOI: 10.11949/j.issn.0438-1157.20181102.
DOI：

LIU Yang, HAN Jitian, YOU Huailiang. Performance of combined cooling, heating and power system based on SOFC/GT/TCO₂ integrated power cycle and LiBr-water absorption chiller[J]. CIESC Journal, 2018, (S2): 341-349. DOI: 10.11949/j.issn.0438-1157.20181102. DOI：

摘要

提出了一种新型冷热电联供系统，通过TCO2循环和溴化锂制冷机回收SOFC/GT循环的排烟余热，实现对外供冷、供热和供电。建立了联供系统热力性能的数学模型，对系统进行了能量分析和（火用）分析，并研究了空燃比、SOFC压力、CO2工质流率、CO2工质分流比和TCO2泵出口压力对系统性能的影响。研究结果表明，在额定工况下，系统的净发电效率为70.79%，系统总（火用）效率为68.29%，综合能源利用率为108.5%。增大空燃比、CO2工质分流比或降低SOFC工作压力、CO2工质流率和TCO2泵出口压力可提高联供系统的综合能源利用率；增大SOFC工作压力、TCO2泵出口压力或降低空燃比可提高联供系统的净发电效率和总（火用）效率，随CO2工质流率和CO2工质分流比的增大，净发电效率和总（火用）效率先降低后增大。

Abstract

A novel combined cooling

heating and power system is proposed. The waste heat of the exhaust gas from the SOFC/GT hybrid system is recovered by a transcritical CO2 cycle and a LiBr-water absorption chiller for cooling

heating and power supply. Thermodynamic mathematical models of the CCHP system are developed

then energy and exergy analyses are used to analyze the performance of the CCHP system. The effect of air-fuel ratio

SOFC pressure

CO2 flow rate

CO2 split ratio and the outlet pressure of the TCO2 pump on the performance of the entire system are studied. The results show that the overall energy utilization

the net power generation and the exergy efficiencies of the entire system can reach 108.5%

70.79% and 68.29%

respectively

under the specified condition. The overall energy utilization efficiency can be improved by increasing air-fuel ratio or CO2 split ratio

and decreasing SOFC pressure

CO2 flow rate or the outlet pressure of the TCO2 pump. The net power generation and the exergy efficiencies can be improved by increasing SOFC pressure or the outlet pressure of the TCO2 pump

or by decreasing air-fuel ratio. The net power generation and the exergy efficiencies first decrease and then increase with the increase in CO2 flow rate or CO2 split ratio.

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Performance of combined cooling, heating and power system based on SOFC/GT/TCO2 integrated power cycle and LiBr-water absorption chiller

DOI：10.11949/j.issn.0438-1157.20181102

摘要

Abstract

关键词

Keywords

references

Performance of combined cooling, heating and power system based on SOFC/GT/TCO₂ integrated power cycle and LiBr-water absorption chiller