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.

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.

Evaluation of daily solar radiation flux using soft computing approaches based on different meteorological information: peninsula vs continent

2018 ◽  
Vol 137 (1-2) ◽  
pp. 693-712 ◽  
Author(s):  
Sungwon Kim ◽  
Youngmin Seo ◽  
Mohammad Rezaie-Balf ◽  
Ozgur Kisi ◽  
Mohammad Ali Ghorbani ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Soft Computing ◽  
Radiation Flux ◽  
Solar Radiation Flux

Interaction of Concentrated Solar Radiation with Materials

2020 ◽  
pp. 1-3
Author(s):  
Muhammad-Sultanhan Paizullahanov ◽  
◽  
Rasul Akbarov ◽  
Abdurashid Abdurakhim Uglu ◽  
Kholmatov, Muslimbek Mukhsinjon ugli Sobirov ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Solar Radiation ◽  
Recovery Process ◽  
Solar Furnace ◽  
Structure And Properties ◽  
Technological Parameters ◽  
Fine Grained ◽  
Concentrated Solar Radiation ◽  
The Relationship ◽  
Synthesis Of Materials

The paper analyzes approaches to modeling the processes of interaction of concentrated solar radiation with materials. The experimental results obtained on the synthesis of materials from a melt in a solar furnace are presented. It is shown that when melting in a solar furnace under the influence of concentrated solar radiation of high density due to the acceleration of the recovery process, it is possible to obtain a fine-grained microstructure that gives the material enhanced mechanical and dielectric properties. It is shown that the relationship between the structure and properties of the materials obtained with the technological parameters of melting and cooling in a solar furnace can be used as an approach to modeling the interaction of concentrated solar radiation with materials

The SCATMES Device for Measurement of Concentrated Solar Radiation

1999 ◽  
Vol 121 (2) ◽  
pp. 116-120 ◽  
Author(s):  
A. Neumann ◽  
A. Schmitz
Keyword(s):  
Solar Radiation ◽  
Measurement System ◽  
Flux Distribution ◽  
Optical Design ◽  
Video Camera ◽  
Solar Furnace ◽  
Camera Systems ◽  
Measurement Principle ◽  
Concentrated Solar Radiation ◽  
Compact Geometry

Video camera systems monitoring a diffuse reflecting target for measuring the flux distribution of concentrated solar radiation are quite common. This technique cannot be used if parts of the experimental setup screen the surface of the target. The development of a new measurement system with a compact geometry and a new optical design is described. With this system it is possible to measure the flux distribution behind parts of an experiment and at any position of the plane of measurement, without any alteration of the setup. The sources of error, especially those of the target and the camera, are described and discussed, and finally a comparison to the existing FATMES-System, which has been performed at the solar furnace of the DLR in Cologne, is presented. Due to its measurement principle the new system is called ’Scanning Camera and Target Measurement System‘ (acronym: SCATMES).

scholarly journals Predicting the Cooling Potential of Different Shading Methods for Greenhouses in Arid Regions

Energies ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4716 ◽  
Author(s):  
Ahmed Abdel-Ghany ◽  
Ibrahim Al-Helal ◽  
Fahad Alkoaik ◽  
Abdullah Alsadon ◽  
Mohamed Shady ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Air Temperature ◽  
Arid Regions ◽  
Radiation Flux ◽  
Cooling Effect ◽  
Plastic Film ◽  
Solar Radiation Flux ◽  
Slaked Lime ◽  
Radiation Transmission

Shading greenhouses in a hot and sunny climate is essential to reduce the inside greenhouse air temperature. However, the type and location of nets need to be addressed properly to determine the shading method that provides a better cooling effect on the greenhouse air. This study was conducted to evaluate the effects of five different shading methods on greenhouse microclimates, and to investigate the cooling potential of each method. Four greenhouse models covered with 200-µm thick plastic film were used for the study: one was kept as control (C), one was whitened with slaked lime (L), and two were shaded with white and black nets (50% shading factor) deployed simultaneously at two locations, in contact (WC, BC) and at 20-cm distance from the cladding film (WD, BD). The microclimatic parameters were measured inside and outside the greenhouse models, and the cooling potential (CP) was predicted for each shading method. The results showed that the black net at 20-cm distance (BD) is desirable as it provides high CP with a reasonable solar radiation transmission. The maximum CP was estimated as 8.5 °C, 8 °C, 6 °C, 3.2 °C, and 2.1 °C for L, BD, BC, WD, and WC, respectively. Shading with white nets is not recommended because their cooling potential is very low. Based on these results, we developed correlations for predicting the CP for each shading method as a function of the transmitted solar radiation flux (Si). These correlations depend on Si. Accordingly, they can be used for small greenhouses, whitewashed with a slaked lime of any concentration, or shaded with a black net having any shading factor.

scholarly journals Wear-Resistant Materials Synthesized in A Solar Furnace

2020 ◽  
pp. 1-3
Author(s):  
Paizullakhanov MS ◽  
◽  
Kholmatov AA ◽  
Sobirov MM ◽  
Khamdamov B ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Wear Resistance ◽  
Solar Radiation ◽  
Absorption Coefficient ◽  
Optimal Combination ◽  
Solar Furnace ◽  
Amorphous Phases ◽  
Fine Crystalline Structure ◽  
Concentrated Solar Radiation ◽  
Synthesis Of Materials

The influence of technological modes of the Big Solar Furnace on the process of synthesis of materials from the melt is studied. It is shown that for the synthesis of materials with a set of specified properties, it is necessary to optimize the density and nature of the energy distribution of concentrated solar radiation in accordance with the degree of blackness, absorption coefficient, melting temperature and thermal conductivity of the charge. It is shown that the remelted state and a homogeneous fine-crystalline structure with an optimal combination of crystalline and amorphous phases, which leads to increased wear resistance of the material.

scholarly journals Photovoltaic Solar Spectral Filtering Using Bio-Filters

2020 ◽  
Vol 9 (1) ◽  
pp. 148 ◽  
Author(s):  
Moses E. Emetere
Keyword(s):  
Climate Change ◽  
Solar Radiation ◽  
Global Climate Change ◽  
Solar Irradiance ◽  
Global Climate ◽  
Spectral Filtering ◽  
Irradiance Measurement ◽  
Pv Panel ◽  
The World

The harsh solar irradiance measurement in recent times has further supported the existence of global climate change. It is not clear if this challenge is located in other parts of the world. Over the years, it has been observed that PV panel have a lower lifespan with a failing performance. Due to the peculiarity of this challenge in the research, the bio-filter was synthesized to shield the PV panel from damage via the aforementioned harsh solar radiation. The bio-filter was tested using the monocrystalline and polycrystalline panel. The results proved that the bio-filters are good stabilizing medium.

PSA Solar furnace: A facility for testing PV cells under concentrated solar radiation

2006 ◽  
Vol 90 (15) ◽  
pp. 2480-2488 ◽  
Author(s):  
J. Fernández-Reche ◽  
I. Cañadas ◽  
M. Sánchez ◽  
J. Ballestrín ◽  
L. Yebra ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Solar Furnace ◽  
Concentrated Solar Radiation
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