Comprehensive Review of Line-Focus Concentrating Solar Thermal Technologies: Parabolic Trough Collector (PTC) vs Linear
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https://doi.org/10.1007/s11630-020-1365-4
Article ID: 1003-2169(2020)00-0000-00
Comprehensive Review of Line-Focus Concentrating Solar Thermal Technologies: Parabolic Trough Collector (PTC) vs Linear Fresnel Reflector (LFR) SUN Jie*, ZHANG Zhi, WANG Li, ZHANG Zhenwen, WEI Jinjia School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China © Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract: In the present review, parabolic trough collector (PTC) and linear Fresnel reflector (LFR) are comprehensively and comparatively reviewed in terms of historical background, technological features, recent advancement, economic analysis and application areas. It is found that although PTC and LFR are both classified as mainstream line-focus concentrating solar thermal (CST) technologies, they are now standing at different stages of development and facing their individual opportunities and challenges. For PTC, the development is commercially mature with steady and reliable performance; therefore, extension of application is the main future demand. For LFR, the development is still in rapid progress to commercial maturity, yet indicating very promising potentials with high flexibility in novel designs and remarkable reduction in capital and operational costs. The question, which has to be answered in order to estimate the future perspectives of these two line-focus CST technologies, becomes which of these characteristics carries more weight or how to reach an optimal trade-off between them.
Keywords: concentrating solar thermal (CST), concentrating solar power (CSP), line-focus, parabolic trough collect (PTC), linear Fresnel reflector (LFR)
1. Introduction Concentrating solar thermal (CST) or generalized concentrating solar power (CSP) systems are referred to as the energy conversion systems using combinations of reflecting mirrors to concentrate direct beam solar radiation to produce forms of useful energy such as heat, electricity or fuels by various downstream technologies, such as the steam Rankine cycle for power generation [1]. The world map of the distribution of CSP projects is illustrated in Fig. 1. Currently, there are four mainstream CST technologies, namely parabolic trough collector (PTC), linear Fresnel reflector (LFR), central receiver Article type: Invited review
Received: Mar 17, 2020
system (CRS) and paraboloidal dish (PD). Based on the shape of concentration image, the PTC and LFR are classified as the line-focus CST technologies while the CRS and PD are classified as the point-focus CST technologies. The general characteristics of these CST technologies are summarized in Table 1. The two point-focus CST technologies are relatively more expensive and basically restricted in the application of power generation due to higher operating temperature and consequently higher thermodynamic cycle efficiency. On the other hand, the two line-focus CST technologies are relatively economical and flexible, ther
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