Experimental performance of a novel scraped surface heat exchanger for latent energy storage for domestic hot water generation
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Knowledge AreaMecánica de Fluidos
SponsorsThe authors gratefully acknowledge to European Regional Development Fund and Ministerio de Ciencia e Innovación - Agencia Estatal de Investigación for the financial support of the project ALTES: “Active Latent Thermal Energy Storage”, Ref. PGC2018-100864-B-C21. We are also grateful to the company Outheway for the technical support in the design and manufacturing of scraper rotative heat exchanger. The present publication was first presented at the 16th Conference on Sustainable Development of Energy, Water and Environment Systems SDEWES conference, Dubrovnik, Croatia, 10–15 October 2021.
Realizado en/conUniversidad Politécnica de Cartagena
Bibliographic CitationA. Egea, A. García, R. Herrero-Martín, J. Pérez-García, Experimental performance of a novel scraped surface heat exchanger for latent energy storage for domestic hot water generation, Renewable Energy, Volume 193, 2022, Pages 870-878, ISSN 0960-1481, https://doi.org/10.1016/j.renene.2022.05.057.
KeywordsPhase change material
Scraped surface heat exchanger
Solar latent thermal energy storage
Domestic hot water
In this work, a novel design of a real scale Scraped Surface Heat Exchanger (SSHE) for solar LTES has been developed and experimentally tested. The main issue in PCM heat exchangers is the growth of a solid layer at the heat transfer walls during the latent energy extraction/discharging, that lowers heat transfer. The removal of the solidified PCM through scraping increases the heat transfer rate with nearly constant heat flux. Those characteristics make it suitable for domestic hot water generation. Discharging tests have been performed in scraping and no scraping modes (SM and nSM). The heat release rate in SM has shown to be between two and three times higher than in nSM. Moreover, in SM there is a complete extraction of the available latent energy (11.9 MJ) in a short period, compared to nSM. Additionally, a performance comparison between the developed SSHE and those available in open literature has been done. The results of heat release density (4 kW/m2) and overall heat transfer ...
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