Thermal performance of parabolic trough solar collectors

The global energy production model is changing from fossil fuels to renewable and nuclear energies. Concentrated solar power is one of the growing technologies that is leading this process. This growth implies the sophistication and size of the systems and, therefore, it requires an increase in maintenance tasks to ensure reliability, availability, maintainability and safety. The aim of this paper is to describe the current context of concentrated solar power, to summarise and analyse the main degradation mechanisms and the main techniques to detect, prevent and mitigate these faults. An exhaustive literature study is presented, considering the most advanced techniques and approaches. A novel qualitative and quantitative analysis of the literature is provided. Finally, the current trends and the future challenges in this field are gathered from this study.

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“…Conrado et al [55] showed different approaches to study the behaviour and costs of both, e.g. thermal, exergy and energy, or numerical models.…”

Section: Thermal Issues In Absorber Tubes and Thermal Storage System mentioning

confidence: 99%

A review of the application performances of concentrated solar power systems

2019

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“…Arancibia-Bulnes et al [8] summarized methods for evaluating the efficiency of solar concentrators and presented vastly sources of mirror imperfections. Salgado Conrado et al [9] summarized data on thermal performance of parabolic trough solar collectors and reviewed simulation works on the concentrators. Research papers usually focus on a chosen aspect of operation, mainly of parabolic concentrators.…”

Section: Irradiance In Polandmentioning

confidence: 99%

Numerical studies on capability to focus solar radiation with mirrors of different curvatures

Kaczor¹,

Buliński²,

Werle³

2019

THERM SCI

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Original scientific paper https://doi.org/10.2298/TSCI19S4153KThe article presents the methodology and results of a parametric analysis performed to investigate the effects of changes in the curvature of the solar concentrator mirror on its ability to focus the radiation. Working conditions of the concentrator, i. e. possible values of radiation intensity, were adopted according to irradiance typical for Poland, and, therefore, similar to the conditions in many European countries. The curvatures of examined mirrors were obtained by modification of a parabolic curve. The calculations were conducted for two cases: when the Sun radiation falls completely directly and when it's half diffuse. The 2-D simulations were conducted in ANSYS FLUENT 18.2 software. Discrete ordinates model was employed to simulate radiation phenomenon. Also, a sensitivity analysis was carried on discrete ordinates model parameters and density of the computational mesh. The results allow stating that some of the new curvatures provide only slightly worse focus than the classical parabolic shape, but also show greater insensitivity to the increasing share of diffusive part of radiation. The presented model is a quick and proven tool for testing new curvatures of solar concentrator mirrors.

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“…Researches focused on the thermal design and analysis of solar collectors are common . There are also lots of literatures in the thermal analysis and performance of the collector tube . However, the simulations and data from experiments were done offline.…”

Section: Introductionmentioning

confidence: 99%

Real-time thermal states monitoring of absorber tube for parabolic trough solar collector with non-uniform solar flux

Wang

Zhang

et al. 2017

Int J Energy Res

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Summary With the world energy shortage problem becoming increasingly prominent, more and more attentions have been paid to the development of renewable energies. Among these sources, solar energy has received extensive attention with its excellent characteristics. The thermal state affects the safety of the solar heat collection system. In this paper, real‐time monitoring of the input heat flux on the inside wall and the temperature field simultaneously of an absorber tube for parabolic trough solar collector were studied. Based on the measured temperatures on the outside wall, the fuzzy adaptive Kalman filter coupled with weighted recursive least squares algorithm (WRLSA) was employed to monitor the heat states of the absorber tube inversely, in which WRLSA was used to acquire the heat flux while fuzzy adaptive Kalman filter was adopted to monitor the temperature field. The method showed strong robustness to resist the ill‐posedness. Accurate monitoring results also can be acquired when there are random disturbances of the heat transfer condition on the inner wall.

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Thermal performance of parabolic trough solar collectors

Cited by 151 publications

References 84 publications

A review of the application performances of concentrated solar power systems

A review of the application performances of concentrated solar power systems

Numerical studies on capability to focus solar radiation with mirrors of different curvatures

Real-time thermal states monitoring of absorber tube for parabolic trough solar collector with non-uniform solar flux

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