An alternative method for calculation of semi-gray radiation heat transfer in solar central cavity receivers

Teichel, Sönke H.; Feierabend, Lukas; Klein, S.A.; Reindl, Douglas T.

doi:10.1016/j.solener.2012.02.035

Cited by 25 publications

(6 citation statements)

References 6 publications

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“…The correlation provided by Paitoonsurikarn and Lovegrove for Solar Dish cavity receivers, with a smaller area than cavity receivers in central tower systems and lower surface temperatures, provides the lowest power rate transferred to the heat transfer fluid; 85.280% of the incident radiation is absorbed by the heat transfer fluid. The results presented here agree quite well with the ones presented by Teichel [8].…”

Section: Comparisons Between the Natural Convection Modelssupporting

confidence: 92%

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Modeling Solar Cavity Receivers: A Review and Comparison of Natural Convection Heat Loss Correlations

2015

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As the main difficulty of modeling cavity receivers is determining natural convection heat losses, this paper presents a survey of the different natural convection correlations developed by several authors to model natural convective heat losses from cavity receivers of solar thermal power tower plants. The different correlations studied for modeling convective heat losses are later compared by performing simulations on an implemented cavity receiver. For this work a model of a PS10-like cavity receiver, using Solar Salt as the heat transfer fluid, is implemented in Modelica. The simulations have shown how the results of four out of the five studied correlations do agree, while one of the analyzed correlations clearly overestimates convective heat losses for the simulations performed.

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Section: Comparisons Between the Natural Convection Modelssupporting

confidence: 92%

“…(8). (8) The surface heat transfer area between stagnant zone and convective zone is A stag = 0.3A ceiling . According to the authors, this model is valid for .…”

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confidence: 99%

Modeling Solar Cavity Receivers: A Review and Comparison of Natural Convection Heat Loss Correlations

2015

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“…The radiosity method was also used by Gonzalez et al [11] in a numerical study of the heat transfer by natural convection and surface thermal radiation in an open cavity receiver; and Natarajan et al [12] studied the heat transfer in a solar trapezoidal cavity using this method. In 2012, Teichel et al [13] showed an alternative method to calculate the semi-gray radiation heat transfer within an enclosure comprised of diffuse surfaces. In this case, the goal was to obtain a simpler equation system in order to reduce computational time.…”

Section: Introductionmentioning

confidence: 99%

Thermal Model of a Dish Stirling Cavity-Receiver

et al. 2015

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This paper presents a thermal model for a dish Stirling cavity based on the finite differences method. This model is a theoretical tool to optimize the cavity in terms of thermal efficiency. One of the main outcomes of this work is the evaluation of radiative exchange using the radiosity method; for that purpose, the view factors of all surfaces involved have been accurately calculated. Moreover, this model enables the variation of the cavity and receiver dimensions and the materials to determine the optimal cavity design. The tool has been used to study the cavity optimization regarding geometry parameters and material properties. Receiver absorptivity has been identified as the most influential property of the materials. The optimal aperture height depends on the minimum focal space.

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“…A numerical code for the calculation of the solar power collected in a central receiver system is done by Erminia Leonardi et.al [6]they used a new Fortran computer program for their code. And when the design of solar receiver systems requires an accurate measurement for the amount of solar radiation and its behavior, an alternative method for calculation of semi-gray radiation heat transfer in solar central cavity receivers was suggested by Sonke.H et al [7]. For different working fluid type such as air, molten salt, many studies are executed.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modeling of a developed Central Receiver Based on Evacuated Solar Tubes

Ali

Gilani

Al-Kayiem

2016

MATEC Web of Conferences

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Abstract. Solar central receiver plays a considerable role in the plant output power; it is one of the most important synthesis in the solar power tower plants. Its performance directly affects the efficiency of the entire solar power generation system. In this study, a new designed receiver model based on evacuated solar tube was proposed, and the dynamic characteristics of the developed receiver were investigated. In order to optimise and evaluate the dynamic characteristics of solar power plant components, the model investigates the solar radiation heat conversion process through the developed receiver, where the energy and mass conservation equations are used to determine the working fluid temperature and state through the receiver parts, beside the calculation and analysis of the thermal losses.

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An alternative method for calculation of semi-gray radiation heat transfer in solar central cavity receivers

Cited by 25 publications

References 6 publications

Modeling Solar Cavity Receivers: A Review and Comparison of Natural Convection Heat Loss Correlations

Modeling Solar Cavity Receivers: A Review and Comparison of Natural Convection Heat Loss Correlations

Thermal Model of a Dish Stirling Cavity-Receiver

Mathematical Modeling of a developed Central Receiver Based on Evacuated Solar Tubes

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