回热式太阳能跨临界CO2朗肯循环仿真方法及热力学性能分析

孟佳; 郝玲; 刘永新

doi:10.19912/j.0254-0096.tynxb.2025-0488

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太阳能学报 ›› 2026, Vol. 47 ›› Issue (7) : 544-554. DOI: 10.19912/j.0254-0096.tynxb.2025-0488

回热式太阳能跨临界CO₂朗肯循环仿真方法及热力学性能分析

孟佳¹, 郝玲^2,3, 刘永新¹

作者信息 +

SIMULATION METHODOLOGY AND THERMODYNAMICPERFORMANCE ANALYSIS OF REGENERATIVE SOLARTRANSCRITICAL CO₂ RANKINE CYCLE

Meng Jia¹, Hao Ling^2,3, Liu Yongxin¹

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文章历史 +

摘要

提出考虑菲涅尔集热器的回热式太阳能跨临界朗肯发电系统仿真方法,并分析系统构型及热效率影响因素。结果表明,集热面积为30~50 m²时,无回热系统性能较优;集热面积为50~70 m²时,内回热系统性能较好。当太阳辐照度从400 W/m²增大到1000 W/m²时,内回热系统输出功、热效率和㶲效率分别提升3.8 kW、5.58个百分点和5.6个百分点。系统输出功及热效率和㶲效率均随太阳入射角的增大以及CO₂质量流量的增加而降低。太阳入射角为0°以及CO₂质量流量为0.08 kg/s时,内回热系统性能可达最优。

Abstract

In this paper, we propose a simulation method for a regenerative solar transcritical Rankine cycle power generation system with a Fresnel collector, and analyse the system configuration and thermal efficiency influencing factors. The results show that when the with area is in the range of 30-50 m², the performance of the system without regeneration is better. In the range of 50-70 m², the internal regeneration system performs better. When the irradiation intensity was increased from 400 W/m² to 1000 W/m², the output work, thermal efficiency and exergy efficiency of the internal reheat system were improved by 3.8 kW, 5.58 and 5.6 percentage points, respectively. The system output power as well as the thermal and efficiencies decreased with the increase of solar incidence angle and the increase of CO₂mass flow rate. The optimum performance of the internal regenerative system is achieved at a solar incidence angle of 0° and a CO₂ mass flow rate of 0.08 kg/s.

导出引用

孟佳, 郝玲, 刘永新. 回热式太阳能跨临界CO₂朗肯循环仿真方法及热力学性能分析[J]. 太阳能学报. 2026, 47(7): 544-554 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0488

Meng Jia, Hao Ling, Liu Yongxin. SIMULATION METHODOLOGY AND THERMODYNAMICPERFORMANCE ANALYSIS OF REGENERATIVE SOLARTRANSCRITICAL CO₂ RANKINE CYCLE[J]. Acta Energiae Solaris Sinica. 2026, 47(7): 544-554 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0488

中图分类号： TK519

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