A Simple Model for Predicting the Flux Distribution Through the Focal Plane of a Multifaceted-Concentrator Solar Furance

1984 ◽  
Vol 106 (1) ◽  
pp. 103-105 ◽  
Author(s):  
D. E. E. Carlson ◽  
R. B. Diver ◽  
E. A. Fletcher
Keyword(s):  
Simple Model ◽  
Focal Plane ◽  
Flux Distribution

Design of a New 45 kWe High-Flux Solar Simulator for High-Temperature Solar Thermal and Thermo-Chemical Research

2010 ◽  
Author(s):  
Katherine R. Krueger ◽  
Jane H. Davidson ◽  
Wojciech Lipin´ski
Keyword(s):  
High Temperature ◽  
Focal Plane ◽  
Flux Distribution ◽  
Solar Thermal ◽  
Optimized Design ◽  
High Flux ◽  
Chemical Research ◽  
Solar Simulator ◽  
Peak Flux ◽  
The Common

In this paper, we present a systematic procedure to design a solar simulator for high-temperature concentrated solar thermal and thermo-chemical research. The 45 kWe simulator consists of seven identical radiation units of common focus, each comprised of a 6.5 kWe xenon arc lamp close-coupled to a precision reflector in the shape of a truncated ellipsoid. The size and shape of each reflector is optimized by a Monte Carlo ray tracing analysis to achieve multiple design objectives, including high transfer efficiency of radiation from the lamps to the common focal plane and desired flux distribution. Based on the numerical results, the final optimized design will deliver 7.5 kW over a 6-cm diameter circular disc located in the focal plane, with a peak flux approaching 3.7 MW/m2.

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

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
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.

A Solar Trough Concentrator for Pill-Box Flux Distribution Over a CPV Panel

2010 ◽  
Vol 132 (1) ◽  
Author(s):  
R. Bader ◽  
A. Steinfeld
Keyword(s):  
Monte Carlo ◽  
Analytical Solution ◽  
Ray Tracing ◽  
Focal Plane ◽  
Flux Distribution ◽  
Solar Flux ◽  
Target Area ◽  
Mirror Surface ◽  
Surface Imperfections ◽  
Flux Concentration

An integral methodology is formulated to analytically derive the exact profile of a solar trough concentrator that delivers a uniform radiative flux distribution over a flat rectangular target area at the focal plane. The Monte Carlo ray-tracing technique is applied to verify the analytical solution and investigate the effect of sun shape and mirror surface imperfections on the radiation uniformity and spillage. This design is pertinent to concentrating photovoltaics at moderate mean solar flux concentration ratios of up to 50 suns.

Operational Performance of the University of Minnesota 45kWe High-Flux Solar Simulator

2012 ◽  
Author(s):  
Katherine R. Krueger ◽  
Wojciech Lipiński ◽  
Jane H. Davidson
Keyword(s):  
Heat Flux ◽  
Focal Plane ◽  
Flux Distribution ◽  
Spectral Characteristics ◽  
Ccd Camera ◽  
Optical Filters ◽  
High Flux ◽  
University Of Minnesota ◽  
Solar Simulator ◽  
The University

This paper presents measured performance of the University of Minnesota’s 45 kWe indoor high-flux solar simulator. The simulator consists of seven radiation units, each comprised of a 6.5 kWe xenon short arc lamp coupled to a reflector in the shape of a truncated ellipsoid of revolution. Data include flux distribution at the focal plane for all seven radiation units operating in tandem and for individual radiation units. The flux distribution is measured optically by acquiring the image of radiation reflected from a Lambertian target with a CCD camera equipped with neutral density optical filters. The CCD camera output is calibrated to irradiation using a circular foil heat flux gage. It is shown that accurate calibration of the heat flux gage must account for its response to the spectral characteristics of the radiation source. The simulator delivers radiative power of approximately 9.2 kW over a 60-mm diameter circular area located in the focal plane, corresponding to an average flux of 3.2 MW m−2, with a peak flux of 7.3 MW m−2.

Performance and Evaluation of Concentrating Solar Collectors for Power Generation

1965 ◽  
Vol 87 (1) ◽  
pp. 1-7 ◽  
Author(s):  
B. Y. H. Liu ◽  
R. C. Jordan
Keyword(s):  
Power Generation ◽  
Focal Plane ◽  
Flux Distribution ◽  
Solar Concentrator ◽  
Solar Collectors ◽  
Optimum Size ◽  
Target Error ◽  
Performance And Evaluation ◽  
Normal Law ◽  
General Method

The geometrical accuracy of a real solar concentrator is defined quantitatively in terms of two equivalent parameters: the standard target error and the angular error; and the relationships between these parameters and the flux distribution on the focal plane are developed. A general method for determining the optimum size and efficiency of an absorber for any given concentrator is described. Specific numerical results are obtained; however, only for the case where the function describing the flux distribution on the focal plane is given by Gauss’ normal law of error. Criteria for determining the applicability of the results are proposed. Finally, experimental techniques (both optical and thermal) of evaluating concentrators are briefly described.

Flux distribution near the focal plane

Solar Energy ◽  
1957 ◽  
Vol 1 (2-3) ◽  
pp. 94-98 ◽  
Author(s):  
Robert E. De La Rue ◽  
Eugene Loh ◽  
Joel L. Brenner ◽  
Nevin K. Hiester
Keyword(s):  
Focal Plane ◽  
Flux Distribution

Investigations on electric charging by electron holography

1994 ◽  
Vol 52 ◽  
pp. 766-767
Author(s):  
B. Frost ◽  
D. C. Joy ◽  
E. Voelkl
Keyword(s):  
Electron Microscope ◽  
Simple Model ◽  
Focal Plane ◽  
Objective Lens ◽  
Image Method ◽  
Electron Holography ◽  
High Symmetry ◽  
Sphere Diameter ◽  
Charged Sphere ◽  
Electric Interaction

The electric charging of latex spheres was investigated by electron holography using a Hitachi HF-2000 field emission electron microscope. In order to get fringe spacings smaller than 1/20 of the diameter of the spheres (0.264 μm and 2.68 μm) and interference widths of at least twice the sphere diameter, we used different magnification modes. The low magnification mode was achieved by switching off the objective lens and imaging the specimen by the intermediate lens. For higher magnifications the specimen was imaged by the objective lens which operated as an electron optical magnifier, i.e. the front focal plane was situated above the specimen.For easiest interpretation of the reconstructed phase distributions, a high symmetry of the sample is of advantage. Therefore we eliminated any unknown electric interaction between a supporting film and the charged sphere by placing the sphere at the edge of a bar of the copper grid. In that case the charge image method can be used as a simple model to evaluate the distribution of the electric potential.

Design of a New 45 kWe High-Flux Solar Simulator for High-Temperature Solar Thermal and Thermochemical Research

2011 ◽  
Vol 133 (1) ◽  
Author(s):  
K. R. Krueger ◽  
J. H. Davidson ◽  
W. Lipiński
Keyword(s):  
High Temperature ◽  
Focal Plane ◽  
Flux Distribution ◽  
Circular Disk ◽  
Solar Thermal ◽  
Optimized Design ◽  
High Flux ◽  
Solar Simulator ◽  
Peak Flux ◽  
The Common

In this paper, we present a systematic procedure to design a solar simulator for high-temperature concentrated solar thermal and thermochemical research. The 45 kWe simulator consists of seven identical radiation units of common focus, each comprised of a 6.5 kWe xenon arc lamp close-coupled to a precision reflector in the shape of a truncated ellipsoid. The size and shape of each reflector is optimized by a Monte Carlo ray tracing analysis to achieve multiple design objectives, including high transfer efficiency of radiation from the lamps to the common focal plane and desired flux distribution. Based on the numerical results, the final optimized design will deliver 7.5 kW over a 6 cm diameter circular disk located in the focal plane, with a peak flux approaching 3.7 MW/m2.

Exergy analysis of the focal-plane flux distribution of solar-thermal concentrators

2018 ◽  
Vol 222 ◽  
pp. 1023-1032 ◽  
Author(s):  
Charles-Alexis Asselineau ◽  
Joe Coventry ◽  
John Pye
Keyword(s):  
Focal Plane ◽  
Flux Distribution ◽  
Exergy Analysis ◽  
Solar Thermal
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