Development of a thermal energy storage system for parabolic trough power plants with direct steam generation / Doerte Laing in Transactions of the ASME. Journal of solar energy engineering, Vol. 132 N° 2 (Mai 2010)  

Public ISBD [article]  inTransactions of the ASME. Journal of solar energy engineering > Vol. 132 N° 2 (Mai 2010) . - pp. [021011/1-8] Titre : Development of a thermal energy storage system for parabolic trough power plants with direct steam generation Type de document : texte imprimé Auteurs : Doerte Laing, Auteur ; Thomas Bauer, Auteur ; Dorothea Lehmann, Auteur Année de publication : 2011 Article en page(s) : pp. [021011/1-8] Note générale : Energie Solaire Langues : Anglais (eng) Mots-clés : Thermal energy storage Phase change material Concrete Parabolic trough power plant Direct stream generation Index. décimale : 621.47 Résumé : For future parabolic trough plants direct steam generation in the absorber pipes is a promising option for reducing the costs of solar thermal power generation. These new solar thermal power plants require innovative storage concepts, where the two-phase heat transfer fluid poses a major challenge. A three-part storage system is proposed where a phase change material (PCM) storage will be deployed for the two-phase evaporation, while concrete storage will be used for storing sensible heat, i.e., for preheating of water and superheating of steam. A pinch analysis helps to recognize interface constraints imposed by the solar field and the power block and describes a way to dimension the latent and sensible components. Laboratory test results of a PCM test module with ~140 kg NaNO3, applying the sandwich concept for enhancement of heat transfer, are presented, proving the expected capacity and power density. The concrete storage material for sensible heat was improved to allow the operation up to 500°C for direct steam generation. A storage system with a total storage capacity of ~1 MWh is described, combining a PCM module and a concrete module, which will be tested in 2009 under real steam conditions around 100 bars. DEWEY : 621.47 ISSN : 0199-6231 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JSEEDO00013200 [...] [article] Development of a thermal energy storage system for parabolic trough power plants with direct steam generation [texte imprimé] / Doerte Laing, Auteur ; Thomas Bauer, Auteur ; Dorothea Lehmann, Auteur . - 2011 . - pp. [021011/1-8]. Energie Solaire Langues : Anglais (eng) in Transactions of the ASME. Journal of solar energy engineering > Vol. 132 N° 2 (Mai 2010) . - pp. [021011/1-8] Mots-clés : Thermal energy storage Phase change material Concrete Parabolic trough power plant Direct stream generation Index. décimale : 621.47 Résumé : For future parabolic trough plants direct steam generation in the absorber pipes is a promising option for reducing the costs of solar thermal power generation. These new solar thermal power plants require innovative storage concepts, where the two-phase heat transfer fluid poses a major challenge. A three-part storage system is proposed where a phase change material (PCM) storage will be deployed for the two-phase evaporation, while concrete storage will be used for storing sensible heat, i.e., for preheating of water and superheating of steam. A pinch analysis helps to recognize interface constraints imposed by the solar field and the power block and describes a way to dimension the latent and sensible components. Laboratory test results of a PCM test module with ~140 kg NaNO3, applying the sandwich concept for enhancement of heat transfer, are presented, proving the expected capacity and power density. The concrete storage material for sensible heat was improved to allow the operation up to 500°C for direct steam generation. A storage system with a total storage capacity of ~1 MWh is described, combining a PCM module and a concrete module, which will be tested in 2009 under real steam conditions around 100 bars. DEWEY : 621.47 ISSN : 0199-6231 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JSEEDO00013200 [...]

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