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.
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.
超临界二氧化碳再压间冷分流光热发电系统性能仿真分析
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.