Three-Dimensional Analysis of a Concentrated Solar Flux

2008 ◽  
Vol 130 (1) ◽  
Author(s):  
David Riveros-Rosas ◽  
Marcelino Sánchez-González ◽  
Claudio A. Estrada
Keyword(s):  
Thermal Stress ◽  
Solar Radiation ◽  
Computer Program ◽  
Ray Tracing ◽  
Solar Irradiance ◽  
Radiation Flux ◽  
Three Dimensional ◽  
Mirror Surface ◽  
Concentrated Solar Radiation ◽  
Focal Zone

In order to improve the durability of receivers used in solar concentrating systems, it is necessary to minimize thermal stress during their operation. A possible way to do that is to design receivers in which the radiative flux density is homogeneous at the surface. For this reason, a detailed 3D study has been carried out for the distribution of concentrated solar radiation in the focal zone of a parabolic concentrator. A computer program has been developed to obtain isosurfaces of solar irradiance and achieve a homogeneous radiation flux on the receiver surface. The algorithm of the program proposes a methodology to obtain flux isosurfaces for a great variety of optical configurations. The effect of the optical errors on the mirror surface has been studied, as well as the effect of the shape of the mirror, e.g., round, square, or faceted. The numerical calculations were made using the convolution ray tracing technique.

Concentrating PV: An Alternative to Calorimeters for Measuring High Solar Flux Densities

2008 ◽  
Vol 130 (4) ◽  
Author(s):  
Jesús Fernández-Reche ◽  
Marcelino Sánchez ◽  
Miguel Alonso ◽  
Inmaculada Cañadas ◽  
Faustino Chenlo ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Solar Irradiance ◽  
Radiation Flux ◽  
Comparative Test ◽  
Solar Flux ◽  
Solar Thermal ◽  
Solar Furnace ◽  
Irradiance Measurement ◽  
Solar Radiation Flux ◽  
Concentrated Solar Radiation

Gardon calorimetric transducers are widely used to measure concentrated solar radiation flux on solar thermal areas. These measurements need some correction to adapt their response from thermal to solar irradiance measurement. The authors propose the use of concentrating photovoltaic PV-cells to measure concentrated solar radiation flux. This paper shows the results obtained from a comparative test carried out in a solar furnace measuring concentrated solar irradiance with calorimetric and photovoltaic sensors, Gardon, and PV-Cells, respectively.

Solar Chimney Power Plant Performance for Different Seasons Under Varying Solar Irradiance and Temperature Distribution

2020 ◽  
Vol 143 (6) ◽  
Author(s):  
Ulku Ece Ayli ◽  
Ekin Özgirgin ◽  
Maısarh Tareq
Keyword(s):  
Solar Radiation ◽  
Solar Energy ◽  
Ambient Temperature ◽  
Solar Irradiance ◽  
Power Plants ◽  
Low Cost ◽  
Renewable Energy Sources ◽  
Three Dimensional ◽  
Plant Performance ◽  
Solar Chimney

Abstract One of the most promising renewable energy sources is solar energy due to low cost and low harmful emissions, and from the 1980s, one of the most beneficial applications of solar energy is the utilization of solar chimney power plants (SCPP). Recently, with the advancement in computer technology, the use of computational fluid dynamics (CFD) methodology for studying SCPP has become an extensive, robust, and powerful technique. In light of the above, in this study, numerical simulations of an SCPP through three-dimensional axisymmetric modeling is performed. A numerical model is created using CFD software, and the results are verified with an experimental study from the literature. The amount of solar radiation and surrounding weather (ambient temperature) were analyzed, and the effects of the irradiance and air temperature on the output power of the SCPP were studied. Ambient temperature is considered as one of the most important factors that influence collector efficiency in a negative or a positive manner. Solar irradiance is considered to be the most important factor that has an impact on SCPP performance. The investigation includes the study of the relationship between solar insolation and ambient temperatures during the daytime since the difference between the minimum and maximum power values and the performance are very important considering seasonal changes. According to the results, power values are dependent on the amount of solar radiation as well as the ambient temperature, and the importance of selection of location thus climate for an SCPP is found to affect the design of the SCPP.

Thermal stress analysis of eccentric tube receiver using concentrated solar radiation

Solar Energy ◽  
2010 ◽  
Vol 84 (10) ◽  
pp. 1809-1815 ◽  
Author(s):  
Fuqiang Wang ◽  
Yong Shuai ◽  
Yuan Yuan ◽  
Guo Yang ◽  
Heping Tan
Keyword(s):  
Thermal Stress ◽  
Solar Radiation ◽  
Stress Analysis ◽  
Thermal Stress Analysis ◽  
Concentrated Solar Radiation ◽  
Eccentric Tube

scholarly journals Three-dimensional Analysis of Solar Radiation Distribution at the Focal Zone of the Solar Furnace of IER_UNAM

2014 ◽  
Vol 57 ◽  
pp. 3031-3040 ◽  
Author(s):  
R. Perez-Enciso ◽  
D. Riveros-Rosas ◽  
M. Sanchez ◽  
C.A. Pérez-Rabago ◽  
C.A. Arancibia-Bulnes ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Dimensional Analysis ◽  
Three Dimensional ◽  
Solar Furnace ◽  
Radiation Distribution ◽  
Focal Zone

The Overview of Basic Types and Characteristics of Solar Concentrating Modules With Louvered Heliostats

2021 ◽  
pp. 1-43
Keyword(s):  
Solar Radiation ◽  
Radiation Flux ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Solar Concentrator ◽  
Dimensional Problem ◽  
Solar Concentrators ◽  
Solar Radiation Flux ◽  
Analytical Review ◽  
Photovoltaic Technologies

The principles of construction and operation of the main concentrating systems, including non-followable modules, are reviewed, and the work of the concentrators is analyzed. An analytical review of modern facade-integrated photovoltaic technologies was carried out, and their classification was given. The known methods for calculating a flat (two-dimensional) scheme for passing the sun's rays through a louvered heliostat make it impossible to assess the real effectiveness of using louvered heliostats with non-tracking solar concentrators, which makes it necessary to consider the practically important three-dimensional problem of calculating the solar radiation flux on the receiving surface of an unfollowing parabolic-cylindrical solar concentrator with louver heliostat.

Results of an Experimental Research of a Solar Concentrating Module With Louvered Heliostats

2021 ◽  
pp. 104-126
Keyword(s):  
Experimental Data ◽  
Information Processing ◽  
Solar Radiation ◽  
Computer Program ◽  
Relative Error ◽  
Experimental Research ◽  
Automatic Measurement ◽  
Parabolic Cylinder ◽  
Mirror Surface ◽  
Solar Concentrator

The developed system of automatic measurement of the main parameters of a solar concentrating module with PV, PVT, and heat receivers allows you to save time during information processing, to obtain data on the dynamics of the processes in the solar concentrating module with the required measurement periodicity. The developed algorithm for calculating the passage of sunlight through the mirror surface of the lamellae and the parabolic cylinder, implemented as a computer program, allows calculating the flow of solar radiation on the receiving surface of the solar concentrator with a relative error of not more than 5%, which is confirmed by experimental data.

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