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https://hdl.handle.net/10316/115730
Title: | Seasonal Storage for Space Heating using Solar DHW Surplus | Authors: | Brites, Gonçalo Garruço, Manuel Fernandes, Marco S. Pinto, Diogo M. Sá Gaspar, Adélio Rodrigues |
Keywords: | Solar energy; Seasonal thermal energy storage; Sensible heat storage; DHW; Space heating; Contents | Issue Date: | Jun-2024 | Publisher: | Elsevier | Project: | POCI-01-0247-FEDER-047070 2022.03339.PTDC UIDB/50022/2020 |
Serial title, monograph or event: | Renewable Energy | Abstract: | Due to the seasonality of solar energy, achieving 100 % of annual solar fraction for domestic hot water (DHW) production is only possible by greatly oversizing the collector area of a solar system, thus creating a significant energy surplus in summer. This simulation study investigates the possibility of using this surplus to promote space heating during winter, in a moderate South European climate, to try achieving a total solar fraction of 100 %. Priority is given to the DHW reservoir, diverting the excess heat to an additional large-capacity seasonal thermal energy storage (STES) reservoir. The best configuration for the number of collectors and STES tank volume was assessed through a parametric study, to reach a compromise between a high solar fraction and a reasonable system efficiency. The results showed that a system with 10 m2 of solar collectors and a 30 m3 STES tank or, alternatively, 20 m2 of collectors and a 20 m3 tank achieved the desired solar fraction and efficiency for the chosen building and local climate conditions. A comparison with the literature shows that this strategy can achieve better results, requiring less collector area and storage volume. | URI: | https://hdl.handle.net/10316/115730 | ISSN: | 0960-1481 | DOI: | 10.1016/j.renene.2024.120889 | Rights: | openAccess |
Appears in Collections: | FCTUC Eng.Mecânica - Artigos em Revistas Internacionais I&D ADAI - Artigos em Revistas Internacionais |
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