A numerical investigation of gas-particle suspensions as heat transfer media for high-temperature concentrated solar power

Marti, Jan; Haselbacher, Andreas; Steinfeld, Aldo

doi:10.1016/j.ijheatmasstransfer.2015.07.033

Cited by 26 publications

(6 citation statements)

References 54 publications

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“…Therefore, part of the incident solar flux passed through gas-particle suspensions, and it was lost. In Case 11,12, about 14% of the total particle mass was blown out when the length of the tube was 2.0 m. The comparisons between Case 1 and Case 2 and between Case 3 and Case 4 in Figure 5 show that an increase in the air mass flow rate led to a lower outlet air temperature. The outlet air temperature of Case 2 was 5 ˚C lower than that of Case 1 and that of Case 4 was 3 ˚C lower than that of Case 3.…”

Section: Resultsmentioning

confidence: 92%

Experimental and Numerical Investigations on the Fluidized Heat Absorption inside Quartz Glass and Metal Tubes

Zhang

Wang

2019

Energies

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Air as a heat transfer fluid has been widely studied in concentrated solar-power generations, but the solar energy absorbed by air inside transparent and opaque tubes has not been comparatively investigated. The heat transfer was studied experimentally and numerically for a fluidized granular bed air receiver with a non-uniform energy flux and the fluidization occurs inside cylindrical metal and quartz glass tubes. The experiments were conducted in a solar simulator with 19 xenon short-arc lamps and showed that the thermal efficiencies in the quartz tube are higher than those in the metal tube. A numerical model was established to study the fluidized heat transport inside the quartz tube, which includes effective thermal conductivities for the conduction, the Syamlal–O’Brien drag model to describe the pressure drop, a modified P-1 model for the radiation, and a two-fluid model (TFM) for gas–solid two-phase flow. The local thermal non-equilibrium model is used to relate the air temperatures to particle temperatures. Comparisons with experimental data show that this model can be used to predict the heat transport inside the quartz glass tube. The maximum relative error was 7.7% when the current is 100 A and the air mass flow rate is 0.53 g/s.

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Section: Resultsmentioning

confidence: 92%

Experimental and Numerical Investigations on the Fluidized Heat Absorption inside Quartz Glass and Metal Tubes

Zhang

Wang

2019

Energies

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“…FB solar receivers have been investigated as early as in the '80s, with layouts spanning from the proof-of-concept to the lab-scale levels: dense stationary gas FB, dilute-or dense-phase circulating FB (Flamant, 1982;Bachovchin et al, 1983;Megahed et al, 1988;Haddad and Elsayed, 1988;Koenigsdorff and Kienzle, 1991;Sasse and Ingel, 1993;Werther et al, 1994;Baud et al, 2012;Chirone et al, 2013;Flamant et al, 2013;Ma et al, 2014;Marti et al, 2015;Reyes-Belmonte et al, 2019;Farsi and Dincer, 2019;Díaz-Heras et al, 2020a). The extension of these concepts to the industrial scale is a matter still deserving thoughtful investigation.…”

Section: Present and Perspective Applications Of Fluidized Bed Solar Receivers And Reactors Solar Energy Collection With Thermal Energy Smentioning

confidence: 99%

Fluidized Beds for Concentrated Solar Thermal Technologies—A Review

et al. 2021

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Thermal and thermochemical processes can be efficiently developed and carried out in fluidized beds, due to the unique properties of fluidized suspensions of solid particles and to the inherent flexibility of fluidized bed design and operation. Coupling fluidization with concentrated solar power is a stimulating cross-disciplinary field of investigation, with the related issues and opportunities to explore. In this review article the current and perspective applications of fluidized beds to collection, storage and exploitation of solar radiation are surveyed. Novel and “creative” designs of fluidized bed solar receivers/reactors are reported and critically discussed. The vast field of applications of solar-driven fluidized bed processes, from energy conversion with thermal energy storage, to solids looping for thermochemical energy storage, production of fuels, chemicals and materials, is explored with an eye at past and current developments and an outlook of future perspectives.

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“…It is considered as one of the most potential energy resources for sustainable energy development in the future. Due to the good development potential of solar energy, many studies on solar energy utilization were carried out in recent years [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Exergy Analysis of Photo-Thermal Interaction Process between Solar Radiation Energy and Solar Receiver

Wang

Chen

2021

J. Therm. Sci.

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A unified theory of non-equilibrium radiation thermodynamics is always in search as it is meaningful for solar energy utilization. An exergy analysis of photo-thermal interaction process between the solar radiation energy and solar receiver is conducted in this paper. The non-equilibrium radiation thermodynamic system is described. The thermodynamic process of photo-thermal interaction between the solar radiation and solar receiver is introduced. Energy, exergy and entropy equations for the photo-thermal process are provided. Formulas for calculating the optimum receiving temperatures of the solar receiver under both non-concentration and solar concentration conditions are presented. A simple solar receiver is chosen as the calculation example to launch the exergy analysis under non-concentration condition. Furthermore, the effect analysis of solar concentration on the thermodynamic performance of the solar receiver for solar thermal utilization is carried out. The analysis results demonstrate that both the output exergy flux and efficiency of the solar receiver can be improved by increasing the solar concentration ratio during the solar thermal utilization process. The formulas and results provided in this paper may be used as a theoretical reference for the further studies of non-equilibrium radiation thermodynamic theory and solar thermal utilization.

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A numerical investigation of gas-particle suspensions as heat transfer media for high-temperature concentrated solar power

Cited by 26 publications

References 54 publications

Experimental and Numerical Investigations on the Fluidized Heat Absorption inside Quartz Glass and Metal Tubes

Experimental and Numerical Investigations on the Fluidized Heat Absorption inside Quartz Glass and Metal Tubes

Fluidized Beds for Concentrated Solar Thermal Technologies—A Review

Exergy Analysis of Photo-Thermal Interaction Process between Solar Radiation Energy and Solar Receiver

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