Simulation analysis on performance of supercritical carbon dioxide recompression intercooling split-flow solar power system

ZHANG Chunwei; YU Bin

doi:10.19666/j.rlfd.202001005

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Simulation analysis on performance of supercritical carbon dioxide recompression intercooling split-flow solar power system

Thermal Power Generation Vol. 49, Issue 10, Pages: 130-135(2020)

更新时间：2025-09-28

- Simulation analysis on performance of supercritical carbon dioxide recompression intercooling split-flow solar power system
- 作者机构：
  
  哈尔滨电气集团有限公司中央研究院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202001005
  CLC： TK514
- Published Online：15 September 2020，
  
  Published：2020
- 稿件说明：
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ZHANG Chunwei, YU Bin. Simulation analysis on performance of supercritical carbon dioxide recompression intercooling split-flow solar power system[J]. Thermal Power Generation, 2020, 49(10): 130-135.
DOI：

ZHANG Chunwei, YU Bin. Simulation analysis on performance of supercritical carbon dioxide recompression intercooling split-flow solar power system[J]. Thermal Power Generation, 2020, 49(10): 130-135. DOI： 10.19666/j.rlfd.202001005.

摘要

为提高基于光热的超临界二氧化碳(S-CO_2)循环发电效率

提出了1种改进的再压间冷分流循环发电方案。通过建立热力学模型对系统进行参数优化

在循环效率最大和熔融盐出口温度为290℃2种情况下

将该方案与传统再压缩循环方案进行了效率和系统总热导对比。计算结果表明:相较于再压缩循环方案

改进方案的效率提高了1%

总热导增加了4%;降低熔融盐出口温度可以减小系统总热导;当熔融盐出口温度限定为290℃时

再压间冷分流方案的效率降低至36%

系统总热导降低了10%。该结果可为塔式光热发电系统的设计和参数选择提供参考。

Abstract

In order to enhance the power generation efficiency of supercritical carbon dioxide(S-CO_2) cycle based on solar power

an improved recompression intercooling split-flow cycle power generation scheme is proposed. The system parameters were optimized by establishing a thermodynamic model

and the efficiency and total thermal conductance of the system were compared with that of the recompression cycle under two conditions: the maximum cycle efficiency and the outlet temperature of molten salt is 290 ℃. The calculation results show that

the efficiency of the improved scheme is 1% higher than that of the recompression scheme

and the total thermal conductance of the improved scheme is 4% higher than that of the recompression cycle. When the outlet temperature of the molten salt is limited to 290 ℃

the efficiency of the recompression intercooling split-flow cycle decreases to 36%

and the total thermal conductance of the system decreases by 10%. The research results provide a reference for design and parameter selection of tower solar power systems.

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Related Institution

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Key Laboratory of Thermal Science and Power Engineering, Ministry of Education, Tsinghua University

Beijing Key Laboratory of Carbon Dioxide Resource Utilization and Emission Reduction Technology, Tsinghua University

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