Potential of performance improvement of concentrated solar power plants by optimizing the parabolic trough receiver
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RESEARCH ARTICLE
Honglun YANG, Qiliang WANG, Jingyu CAO, Gang PEI, Jing LI
Potential of performance improvement of concentrated solar power plants by optimizing the parabolic trough receiver
© The Author(s) 2020. This article is published with open access at link.springer.com and journal.hep.com.cn 2020
Abstract This paper proposes a comprehensive thermodynamic and economic model to predict and compare the performance of concentrated solar power plants with traditional and novel receivers with different configurations involving operating temperatures and locations. The simulation results reveal that power plants with novel receivers exhibit a superior thermodynamic and economic performance compared with traditional receivers. The annual electricity productions of power plants with novel receivers in Phoenix, Sevilla, and Tuotuohe are 8.5%, 10.5%, and 14.4% higher than those with traditional receivers at the outlet temperature of 550°C. The levelized cost of electricity of power plants with double-selectivecoated receivers can be decreased by 6.9%, 8.5%, and 11.6%. In Phoenix, the optimal operating temperature of the power plants is improved from 500°C to 560°C by employing a novel receiver. Furthermore, the sensitivity analysis of the receiver heat loss, solar absorption, and freeze protection temperature is also conducted to analyze the general rule of influence of the receiver performance on power plants performance. Solar absorption has a positive contribution to annual electricity productions, whereas heat loss and freeze protection temperature have a negative effect on electricity outputs. The results indicate that the novel receiver coupled with low melting temperature molten salt is the best configuration for improving the overall performance of the power plants. Keywords concentrated solar power, parabolic trough receiver, heat loss, solar energy, annual performance Received Apr. 10, 2020; accepted Jul. 13, 2020; online Nov. 20, 2020
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Honglun YANG, Qiliang WANG, Jingyu CAO, Gang PEI ( ) Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230026, China E-mail: [email protected]
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Jing LI ( ) School of Engineering and Computer Science, University of Hull, Hull, HU6 7RX, UK E-mail: [email protected]
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Introduction
Solar energy is one of the most promising alternative energies that can potentially replace fossil energy to meet the energy consumption in the future [1]. Solar power generation can be classified into two systems, photovoltaic (PV) power systems [2] and concentrated solar power (CSP) systems [3]. At present, the parabolic trough solar power generation system is the high-temperature solar thermal utilization technologies with the most reliable technology, the largest share of the market, and the most economical of the investment [4,5]. Parabolic trough receivers are vital components of parabolic trough CSP plants, which is regarded as the main reason for the high heat loss at high temperature and results in significant collecting efficie
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