Viability Assessment of a Concentrated Solar Power Tower With a Supercritical CO2 Brayton Cycle Power Plant

被引:71
作者
Alsagri, Ali Sulaiman [1 ]
Chiasson, Andrew [2 ]
Gadalla, Mohamed [3 ]
机构
[1] Qassim Univ, Unayzah Coll Engn, Dept Mech Engn, Unayzah 51911, Saudi Arabia
[2] Univ Dayton, Coll Engn, Dept Mech Engn, Dayton, OH 45469 USA
[3] Amer Univ Sharjah, Coll Engn, Dept Mech Engn, Sharjah 26666, U Arab Emirates
来源
JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME | 2019年 / 141卷 / 05期
关键词
solar energy; heliostat field; TES molten salt; Brayton cycle; heat exchanger; CO2; recompression sCO(2) cycle; supercritical carbon dioxide; ENERGY; OPTIMIZATION; MULTIPLE; SYSTEMS; COSTS; MODEL; PV;
D O I
10.1115/1.4043515
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The aim of this study was to conduct thermodynamic and economic analyses of a concentrated solar power (CSP) plant to drive a supercritical CO2 recompression Brayton cycle. The objectives were to assess the system viability in a location of moderate-to-high-temperature solar availability to sCO(2) power block during the day and to investigate the role of thermal energy storage with 4, 8, 12, and 16 h of storage to increase the solar share and the yearly energy generating capacity. A case study of system optimization and evaluation is presented in a city in Saudi Arabia (Riyadh). To achieve the highest energy production per unit cost, the heliostat geometry field design integrated with a sCO(2) Brayton cycle with a molten-salt thermal energy storage (TES) dispatch system and the corresponding operating parameters are optimized. A solar power tower (SPT) is a type of CSP system that is of particular interest in this research because it can operate at relatively high temperatures. The present SPT-TES field comprises of heliostat field mirrors, a solar tower, a receiver, heat exchangers, and two molten-salt TES tanks. The main thermoeconomic indicators are the capacity factor and the levelized cost of electricity (LCOE). The research findings indicate that SPT-TES with a supercritical CO2 power cycle is economically viable with 12 h thermal storage using molten salt. The results also show that integrating 12 h-TES with an SPT has a high positive impact on the capacity factor of 60% at the optimum LCOE of $0.1078/kW h.
引用
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页数:15
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