Thermal and hydrodynamic behavior of ceramic volumetric absorbers for central receiver solar power plants: A review
| Autor: | José Gonzalez-Aguilar, Manuel Romero, Gabriel Olalde, Fabrisio Gomez-Garcia |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Pressure drop
Thermal efficiency Materials science Renewable Energy Sustainability and the Environment business.industry 020209 energy Flow (psychology) 02 engineering and technology Mechanics visual_art Thermal Heat transfer 0202 electrical engineering electronic engineering information engineering visual_art.visual_art_medium Radiative transfer Forensic engineering Ceramic business Solar power |
| Zdroj: | Renewable and Sustainable Energy Reviews. 57:648-658 |
| ISSN: | 1364-0321 |
| DOI: | 10.1016/j.rser.2015.12.106 |
| Popis: | This paper presents an extensive review of the thermal and hydrodynamic behavior of conventional ceramic volumetric absorbers, i.e. monolithic honeycombs and open-cell foams. It is intended to provide scientific support to the design of more efficient absorbers with novel structures and materials, based on a further understanding of how the characteristics of conventional absorbers modify their performance. This review identifies radiative and thermal properties that a good absorber must have, providing reference values for SiC absorbers. An overview on how the typical manufacturing process modifies their properties is also presented. Significance of geometrical parameters and radiative and thermal properties of both type of absorbers, as well as the effects of incoming light direction on the solar radiation propagation and the solid-air temperature distributions within their structure are discussed. Typical operating conditions of these elements are given. Their characteristic outlet air temperature and thermal efficiency are compared and discussed. The different mechanisms that are responsible for the pressure drop in these elements are identified, and their influence on the heat transfer mechanisms is analyzed. To conclude, factors that promote the appearance of flow instabilities are described. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect