Study on radiation flux of the receiver with a parabolic solar concentrator system

Mao, Qianjun; Shuai, Yong; Yuan, Yuan

doi:10.1016/j.enconman.2014.03.083

Cited by 85 publications

(44 citation statements)

References 30 publications

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“…Cavity receiver shapes are discussed in several studies that examine cavity optimisation approaches: to make the flux on the internal walls of the receiver uniform [10], minimize overall radiative losses [1], optimise the geometry taking into account a coupled radiative and hydrodynamic heat transfer model [2], improve optical efficiency using a cylindrical geometry with a convex element at the bottom [11] or to study optimal geometrical aspect ratio for cylindrical cavity receivers at the focus of multi-dish concentrators [7].…”

Section: Case Study: Concentrated Solar Receiver Geometry Optimisationmentioning

confidence: 99%

Integration of Monte-Carlo ray tracing with a stochastic optimisation method: application to the design of solar receiver geometry

Asselineau

Zapata

Pye

2014

Light, Energy and the Environment

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Section: Case Study: Concentrated Solar Receiver Geometry Optimisationmentioning

confidence: 99%

Integration of Monte-Carlo ray tracing with a stochastic optimisation method: application to the design of solar receiver geometry

Asselineau

Zapata

Pye

2014

Light, Energy and the Environment

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“…Many studies focused on the effects of the cavity geometry shape, [8][9][10][11][12] installation location, 8,9 geometry size, 13,14 and cavity wall materials (ie, absorptivity) 13,15 of the cavity receiver on the optical performance of dish concentrator/cavity receiver system. Daabo et al 8,9 systematic studied the optical performance of the cavity receiver with a cylindrical, conical, and spherical geometries using an advanced ray-tracing OptisWorks software base on Monte Carlo ray-tracing method (MCRT).…”

Section: Introductionmentioning

confidence: 99%

Effects of geometrical parameters of a dish concentrator on the optical performance of a cavity receiver in a solar dish-Stirling system

2018

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Summary Dish‐Stirling concentrated solar power (DS‐CSP) system is a complex system for solar energy‐thermal‐electric conversion. The dish concentrator and cavity receiver are optical devices for collecting the solar energy in DS‐CSP system; to determine the geometric parameters of dish concentrator is one of the important steps for design and development of DS‐CSP system, because it directly affects the optical performance of the cavity receiver. In this paper, the effects of the geometric parameters of a dish concentrator including aperture radius, focal length, unfilled radius, and fan‐shaped unfilled angle on optical performance (ie, optical efficiency and flux distribution) of a cavity receiver were studied. Furthermore, the influence of the receiver‐window radius of the cavity receiver and solar direct normal irradiance is also investigated. The cavity receiver is a novel structure that is equipped with a reflecting cone at bottom of the cavity to increases the optical efficiency of the cavity receiver. Moreover, a 2‐dimensional ray‐tracking program is developed to simulate the sunlight transmission path in DS‐CSP system, for helping understanding the effects mechanism of above parameters on optical performance of the cavity receiver. The analysis indicates that the optical efficiency of the cavity receiver with and without the reflecting cone is 89.88% and 85.70%, respectively, and former significantly increased 4.18% for 38 kW XEM‐Dish system. The uniformity factor of the flux distribution on the absorber surface decreases with the decreases of the rim angle of the dish concentrator, but the optical efficiency of the cavity receiver increases with the decreases of the rim angle and the increase amplitude becomes smaller and smaller when the rim angle range from 30° to 75°, So the optical efficiency and uniformity factor are conflicting performance index. Moreover, the unfilled radius has small effect on the optical efficiency, while the fan‐shaped unfilled angle and direct normal irradiance both not affect the optical efficiency. In addition, reducing the receiver‐window radius can improve the optical efficiency, but the effect is limited. This work could provide reference for design and optimization of the dish concentrator and establishing the foundation for further research on optical‐to‐thermal energy conversion.

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“…A rim angle of 45 • was suggested for the design of the system solar collector by investigators [9,[14][15][16], taking into consideration the highest concentration ratio and thermal performance. The effect of the distribution of the solar receiver radiation flux was examined by Mao et al [17]. Ruelas et al [18] developed a mathematical model and conducted numerical investigations to simulate a thermal model for a 3 kW Stirling engine.…”

Section: Introductionmentioning

confidence: 99%

Exergy Analysis of a Pilot Parabolic Solar Dish-Stirling System

Gholamalizadeh

Chung

2017

Entropy

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Energy and exergy analyses were carried out for a pilot parabolic solar dish-Stirling System. The system was set up at a site at Kerman City, located in a sunny desert area of Iran. Variations in energy and exergy efficiency were considered during the daytime hours of the average day of each month in a year. A maximum collector energy efficiency and total energy efficiency of 54% and 12.2%, respectively, were predicted in July, while during the period between November and February the efficiency values were extremely low. The maximum collector exergy efficiency was 41.5% in July, while the maximum total exergy efficiency reached 13.2%. The values of energy losses as a percentage of the total losses of the main parts of the system were also reported. Results showed that the major energy and exergy losses occurred in the receiver. The second biggest portion of energy losses occurred in the Stirling engine, while the portion of exergy loss in the concentrator was higher compared to the Stirling engine. Finally, the performance of the Kerman pilot was compared to that of the EuroDish project.

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Study on radiation flux of the receiver with a parabolic solar concentrator system

Cited by 85 publications

References 30 publications

Integration of Monte-Carlo ray tracing with a stochastic optimisation method: application to the design of solar receiver geometry

Integration of Monte-Carlo ray tracing with a stochastic optimisation method: application to the design of solar receiver geometry

Effects of geometrical parameters of a dish concentrator on the optical performance of a cavity receiver in a solar dish-Stirling system

Exergy Analysis of a Pilot Parabolic Solar Dish-Stirling System

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