Experimental investigation of parabolic dish concentrator with various sizes of receiver

This study presents the geometric aspects of the focal image for a solar parabolic concentrator (SPC) using the ray tracing technique to establish parameters that allow the designation of the most suitable geometry for coupling the SPC to absorber-receiver. The efficient conversion of solar radiation into heat at these temperature levels requires a use of concentrating solar collectors. In this paper detailed optical design of the solar parabolic dish concentrator is presented. The system has diameter D=3800 mm and focal distance f=2260 mm. The parabolic dish of the solar system consists of 11 curvilinear trapezoidal reflective petals. For the construction of the solar collectors, mild steel-sheet and square pipe were used as the shell support for the reflecting surfaces. This paper presents optical simulations of the parabolic solar concentrator unit using the ray tracing software TracePro. The total flux on the receiver and the distribution of irradiance for absorbing flux on center and periphery receiver are given. The goal of this paper is to present the optical design of a low-tech solar concentrator that can be used as a potentially low cost tool for laboratory scale research on the medium-temperature thermal processes, cooling, industrial processes, polygeneration systems, and so forth.

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Design and Analysis of a Novel Hybrid Solar/Gas Dish Stirling System (HS/GDSS)

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.479-480.575 ◽

2013 ◽

Vol 479-480 ◽

pp. 575-579 ◽

Cited By ~ 1

Author(s):

Wen Bei Zhan ◽

Guo Qiang Xu ◽

Yong Kai Quan ◽

Xiang Luo ◽

Ting Ting Li

Keyword(s):

Power Plant ◽

Solar Radiation ◽

Thermodynamic Models ◽

Design Capacity ◽

System Parameters ◽

Parabolic Dish ◽

Electricity Power ◽

Overall Efficiency ◽

Parabolic Dish Concentrator

In this paper, a 20kW design capacity solar parabolic dish concentrator hybrid solar/gas dish Stirling system (HS/GDSS) is proposed. To ensure a steady operation of an electricity power plant, HS/GDSS uses gas as complement when solar radiation is weak. Thermodynamic models were made to conduct design of system parameters. After detail characteristics were chosen, analysis was carried out to evaluate this system. The results show that within design condition, overall efficiency of the system is 27.58% at daytime and 33.94% at night, which has advantages over single-energy solar dish Stirling electricity power plant.

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Study on Concentrating Characteristics of a Solar Parabolic Dish Concentrator within High Radiation Flux

International Journal of Photoenergy ◽

10.1155/2015/787280 ◽

2015 ◽

Vol 2015 ◽

pp. 1-7 ◽

Cited By ~ 1

Author(s):

Qianjun Mao ◽

Liya Zhang ◽

Hongjun Wu

Keyword(s):

Focal Plane ◽

Flux Distribution ◽

Radiation Flux ◽

Focal Length ◽

Thermal Conversion ◽

High Radiation ◽

Equal Area ◽

Future Design ◽

Parabolic Dish ◽

Parabolic Dish Concentrator

Concentrating characteristics of the sunlight have an important effect on the optical-thermal conversion efficiency of solar concentrator and the application of the receiver. In this paper, radiation flux in the focal plane and the receiver with three focal lengths has been investigated based on Monte Carlo ray-tracing method. At the same time, based on the equal area-height and equal area-diameter methods to design four different shape receivers and numerical simulation of radiation flux distribution characteristics have also been investigated. The results show that the radiation flux in the focal plane increases with decreasing of the focal length and the diameter of the light spot increases with increasing of the focal length. The function of the position with a maximum of radiation flux has been obtained according to the numerical results. The results also show that the radiation flux distribution of cylindrical receiver has the best performance in all four receivers. The results can provide a reference for future design and application of concentrating solar power.

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