不同供热量下太阳能S-I循环热力-经济分析  

Thermal and economic performance analysis of solar S-I cycle with different heating capacities

作　　者：孙雪 李健 宋蔷[1] 杨震[1] 段远源[1] SUN Xue;LI Jian;SONG Qiang;YANG Zhen;DUAN Yuanyuan(Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China;School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]清华大学能源与动力工程系,北京100084 [2]北京理工大学机械与车辆学院,北京100081

出　　处：《热科学与技术》2025年第1期48-56,共9页Journal of Thermal Science and Technology

基　　金：国家自然科学基金资助项目(51976103);北京市自然科学基金资助项目(3222031);华能集团总部科技资助项目(HNKJ21-H31)。

摘　　要：太阳能硫碘(sulfur-iodine,S-I)循环制氢技术具有理论效率高、清洁、适合规模化应用等优点。建立了塔式太阳能S-I循环制氢系统的热力、经济性能分析模型,采用能量和?分析方法揭示了在固定供热量时系统在稳定和波动天气情况下的热传递和损失特性,并探究了不同供热量下太阳能S-I循环制氢系统的最优镜场配置、热力性能及投资成本变化情况。结果表明:在100.00 MW供热量下,系统太阳能-氢热效率和?效率分别为11.30%和11.81%,热损和?损最多的环节分别是S-I循环和镜场。随供热量增加,镜场规模逐渐增大,系统热效率和?效率的波动减小,且聚光集热部分的规模效应使得单位产氢成本不断降低。The solar-driven sulfur-iodine(S-I)cycle for hydrogen production has the advantages of high theoretical efficiency,cleanliness,and suitability for large-scale hydrogen production.In this paper,the thermal and economic models of the solar hydrogen production system integrated with the solar tower and S-I cycle were established.The energy transfers and losses of the integrated system with fixed heating capacity under stable and fluctuating weather conditions were obtained by using energy and exergy analysis methods.In addition,the optimal heliostat field configuration,thermal and economic performance of the integrated system with different heating capacities were obtained.The results showed that under a fixed heating capacity of 100.00 MW,the solar-hydrogen thermal efficiency and exergy efficiency of the integrated system are 11.30% and 11.81%,with the most heat loss and exergy loss in the S-I cycle and heliostat fields respectively.As the heating capacity increases,the size of the heliostat fields increases,while the fluctuations in thermal efficiency and exergy efficiency of the integrated system fall down.However,the scale effect of the concentrated solar power technology leads to a reduction in the unit hydrogen production cost.

关 键 词：太阳能 S-I循环 制氢 热力分析 经济分析 

分 类 号：TK123[动力工程及工程热物理—工程热物理]