不同聚光方式下的光热SCO_(2)发电系统经济性与环保性分析  

ECONOMIC AND ENVIRONMENTAL ANALYSIS OF SCO_(2) POWER SYSTEM UNDER DIFFERENT SOLAR CONCENTRATING METHODS

作　　者：张一岑 范刚 毕京访 王宇兴 戴义平[1] Zhang Yicen;Fan Gang;Bi Jingfang;Wang Yuxing;Dai Yiping(School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《太阳能学报》2025年第2期479-487,共9页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51976145)。

摘　　要：分析分别在线性菲涅尔式、槽形抛物面和塔式聚光方式下的SCO_(2)发电系统的经济性和环保性,同时比较不同种类的储热工质和SCO_(2)循环型式对系统性能的影响,并对系统参数进行多目标优化设计。结果表明:降低低温储热罐内工质温度或增大高温储罐内工质温度可减少投资成本;基于塔式集热器和再压缩式SCO_(2)循环的光热SCO_(2)发电系统兼具最佳热经济性和环保性,其中使用NaCl-KCl-MgCl_(2)三元高温熔融盐作为储热工质。在德令哈地区该系统全生命周期内度电成本为0.131美元/kWh,输出每kWh电产生的CO_(2)当量排放为24.3 g/kWh。In this paper,the economic and environmental performance of SCO_(2) power systems under linear Fresnel,trough parabolic and tower concentrating methods are analyzed respectively,and the effects of different thermal energy storage working fluids and SCO_(2) cycles on system performance are compared.Finally,the multi-objective optimization is conducted for the proposed systems.The results show that increasing the hot tank temperature or decreasing the cold tank temperature contribute to lower investment cost.The SPT plant integrated with recompression SCO_(2) cycle and NaCl-KCl-MgCl_(2) molten salt as the thermal storage medium provides the best thermo-economic and environmental performance.In Delingha,the system cost is 0.131$/kWh over the life sycle and produces 24.3 g/kWh of CO_(2)-equivalent emissions per kWh of output.

关 键 词：聚光太阳能 经济性分析 环保性影响 超临界CO_(2)循环 

分 类 号：TK514[动力工程及工程热物理—热能工程]