Cavity receivers in solar dish collectors: A geometric overview

The innovation in concentrated solar power (CSP) systems is one of the many vital solutions to meet the ever-increasing global energy demands. Among various CSP systems, point focus solar concentrators can attain a higher concentration ratio and helps reduce the size of the receiver, resulting in higher operating temperatures, lower thermal losses, and higher system exergy. This article presents a review on a particular class of CSP systems known as stationary point focus solar concentrators, that is, point focus solar concentrators having a stationary receiver. They can be categorized as (a) Scheffler reflector, (b) Scheffler-type concentrator, (c) high temperature concentrator, (d) central tower receiver, and (e) CNRS solar furnace. Having a stationary receiver helps reduce the maintenance and simplifies the plumbing network for heat transfer fluid. However, low maintenance might be a tradeoff on the performance side. This review systematically collates the literature on stationary point focus solar concentrators. Also, the basics of solar angles and various solar tracking systems applicable to this class of CSP systems are covered. K E Y W O R D Scentral tower receiver, fixed focus solar concentrator, high-temperature concentrator, Scheffler reflector, Scheffler-type solar concentrator

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“…Kasaeian et al 109 reviewed the geometric aspects of various cavity receivers used in dish-type solar collectors.…”

Section: Cavity Receiversmentioning

confidence: 99%

Stationary point focus solar concentrators—A review

Reddy

Khan

2022

Intl J of Energy Research

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“…Due to its high thermal efficiency, it can be generally used to supply prime movers such as the Bryton cycle, Rankine cycle, organic Rankine cycle, and micro gas turbines which require high operating temperatures [32]. also, one of its properties is that it doesn't require water for its cooling or operating processes, making it more suitable for power plant construction in where water-shortage areas [33]. The Solar Dish Stirling System has several uses, the most important of which is shown in Fig.…”

Section: Parabolic Dish Reflectormentioning

confidence: 99%

Comparison Between CSP Systems and Effect of Different Heat Transfer Fluids on the Performance

2022

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While fossil fuel sources have declined and energy demand has increased, in addition to the climate change crisis, the world turned to using renewable energies to get its energy. Concentrated solar power (CSP) is one of the main technologies used for this purpose. This study aims to compare the different concentrated solar power technologies in terms of their efficiency, cost, concentration ratio, and receiver temperature. Results showed that technologies were arranged according to temperatures from high to low as follows; the parabolic dish reflector, central receiver collector, linear Fresnel reflector, and parabolic trough collector. According to cost, the parabolic dish reflector has the highest price, while the linear Fresnel reflector has the lowest price. Also, the parabolic dish reflector has the highest efficiency among the others, followed by the central receiver collector, then the linear Fresnel reflector, and the parabolic trough collector respectively. Additionally; the study represented that point-focus devices have a high percentage of concentration ratio than line-focus devices. Finally, in order to exploit these sources throughout the day, it is recommended to use phase change materials to store the excess thermal energy as a positive and effective approach to solving the energy problems.

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“…Previous research using parabolic dish collectors and other cavity receiver geometries and optimization approaches were presented and addressed by Kasaeian et al (2021) [11]. The work investigates cavity receivers with cylindrical, hemispherical, conical, and flat sides.…”

Section: Introductionmentioning

confidence: 99%

Review of Heat Transfer Analysis in Different Cavity Geometries with and without Nanofluids

et al. 2022

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Many strategies have been attempted for accomplishing the needed changes in the heat-transfer rate in closed cavities in recent years. Some strategies used include the addition of flexible or hard partitions to the cavities (to split them into various pieces), thickening the borders, providing fins to the cavities, or altering the forms or cavity angles. Each of these methods may be used to increase or decrease heat transmission. Many computational and experimental investigations of heat transport in various cavity shapes have been conducted. The majority of studies focused on improving the thermal efficiency of heat transmission in various cavity containers. This paper introduced a review of experimental, numerical, and analytical studies related to heat transfer analyses in different geometries, such as circular, cylindrical, hexagonal, and rectangular cavities. Results of the evaluated studies indicate that the fin design increased heat transmission and sped up the melting time of the PCM; the optimal wind incidence angle for the maximum loss of combined convective heat depends on the tilt angle of the cavity and wind speed. The Nusselt number graphs behave differently when decreasing the Richardson number. Comparatively, the natural heat transfer process dominates at Ri = 10, but lid motion is absent at Ri = 1. For a given Ri and Pr, the cavity without a block performed better than the cavity with a square or circular block. The heat transfer coefficient at the heating sources has been established as a performance indicator. Hot source fins improve heat transmission and reduce gallium melting time.

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Cavity receivers in solar dish collectors: A geometric overview

Cited by 59 publications

References 104 publications

Stationary point focus solar concentrators—A review

Stationary point focus solar concentrators—A review

Comparison Between CSP Systems and Effect of Different Heat Transfer Fluids on the Performance

Review of Heat Transfer Analysis in Different Cavity Geometries with and without Nanofluids

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