采用不同集热器的太阳能有机朗肯-闪蒸循环性能分析  

Performance analysis of solar binary-flashing cycle driven by flat-plate collector and evacuated tube collector

作　　者：卜宪标[1,2,3] 刘茜 李华山[1,2,3] 王令宝[1,2,3,4] 谢宁 BU Xianbiao;LIU Xi;LI Huashan;WANG Lingbao;XIE Ning(Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,Guangdong,China;Key Laboratory of Renewable Energy,Chinese Academy of Sciences,Guangzhou 510640,Guangdong,China;Guangdong Key Laboratory of New and Renewable Energy Research and Development,Guangzhou 510640,Guangdong,China;University of Chinese Academy of Sciences,Beijing 100049,China;Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,Guangdong,China)

机构地区：[1]中国科学院广州能源研究所,广东广州510640 [2]中国科学院可再生能源重点实验室,广东广州510640 [3]广东省新能源和可再生能源研究开发与应用重点实验室,广东广州510640 [4]中国科学院大学,北京100049 [5]广东电网有限责任公司电力科学研究院,广东广州510080

出　　处：《化工进展》2018年第8期2976-2983,共8页Chemical Industry and Engineering Progress

基　　金：国家重点研发计划(2017YFB0903201);广东省自然科学基金(2016A030313174);中国科学院可再生能源重点实验室基金(Y607j11001);广州市科技计划(201607010106);中国科学院青年创新促进会项目(2017402)

摘　　要：针对太阳能有机朗肯-闪蒸循环(SBFC),本文基于EES(engineering equation solver)软件建立数学模型,以R245fa为循环工质,在集热器出口热水温度介于353.15~373.15K范围内,对平板集热器(FPC)和真空管集热器(ETC)驱动的SBFC系统热力性能以及投资成本进行了对比分析。选用的性能指标参数包括净输出功、热效率、第二定律效率、不可逆损失以及比初始投资。结果表明,随着集热器出口热水温度的增大,SBFC系统的热力性能显著升高,且采用ETC的系统比FPC系统在热力性能上更具优势,该优势随着热水温度的升高而持续增大。研究同时表明,在SBFC的投资成本中,太阳能集热器投资占比最大,且采用ETC的系统比初始投资远大于采用FPC的系统;此外,集热器出口热水温度的升高有利于降低SBFC系统的比初始投资。A mathematical model for solar binary-flashing cycle（SBFC） driven by flat-plate collectors and evacuated tube collectors was developed based on EES（engineering equation solver） software in this paper. With R245 fa as working fluids, the effect of hot water temperatures at solar collector outlet, ranging from 353.15 K to 373.15 K, on the thermodynamic performance and investment cost of the SBFC system has been analyzed. In the analysis, the net power output, thermal efficiency, exergy efficiency, exergy loss and specific investment cost were selected as performance indicators. Results showed that under the given working conditions, an increase in the hot water temperature at solar collector outlet could significantly improve the thermodynamic performance of the SBFC system. The thermodynamic performance of the system with ETC outperformed that of with FPC; and the advantage increased with the increased hot water temperature at solar collector outlet. Meanwhile, it was also found that the investment cost of solar collector accounted for the largest proportion of the total investment cost and the system with ETC had higher investment cost than that of with FPC. Besides, the specific investment cost decreased with the increased hot water temperature at solar collector outlet.

关 键 词：平板集热器 真空管集热器 有机朗肯-闪蒸循环 热力性能 投资成本 

分 类 号：TK123[动力工程及工程热物理—工程热物理]