Performance of S-CO2 Brayton Cycle and Organic Rankine Cycle（ORC） Combined System Considering the Diurnal Distribution of Solar Radiation

论文摘要

This paper researches the performance of a novel supercritical carbon dioxide（S-CO2） Brayton cycle and organic Rankine cycle（ORC） combined system with a theoretical solar radiation diurnal distribution. The new system supplies all solar energy to a S-CO2 Brayton cycle heater, where heat releasing from the S-CO2 cooler is stored in the thermal storage system which is supplied to the ORC. Therefore, solar energy is kept at a high temperature, while at the same time the thermal storage system temperature is low. This paper builds a simple solar radiation diurnal distribution model. The maximum continuous working time, mass of thermal storage material, and parameter variations of the two cycles are simulated with the solar radiation diurnal distribution model. 10 organic fluids and 5 representative thermal storage materials are compared in this paper, with the mass and volume of these materials being shown. The longer the continuous working time is, the lower the system thermal efficiency is. The maximum continuous working time can reach 19.1 hours if the system provides a constant power output. At the same time, the system efficiency can be kept above 38% for most fluids.

论文目录

文章来源

类型: 期刊论文

作者: GAO Wei,YAO Mingyu,CHEN Yong,LI Hongzhi,ZHANG Yifan,ZHANG Lei

来源: Journal of Thermal Science 2019年03期

年度: 2019

分类: 工程科技Ⅱ辑

专业: 电力工业

单位: Xi’an Thermal Power Research Institute Co., Ltd.

基金: financial support provided by the National Natural Science Foundation of China (Grant No. 51706181,51806172),the Postdoctoral Science Foundation of China (Grant No. 2017M613294XB),Key Programs of China Huaneng Group (Grant No. HNKJ15-H07),Young Talent Programs of Shaanxi Province of China(Grant No. ZD-18-SST04)

分类号: TM615

页码: 463-471

总页数: 9

文件大小: 554K

下载量: 35

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