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Swimming pool thermal energy storage, an alternative for distributed cooling energy storage

Hunt, JD and Zakeri, B and Leal Filho, W and Schneider, PS and Weber, NDAB and Vieira, LW and Ermel, C and Castro, NJD and Barbosa, PSF and Nascimento, A and Mastrucci, A (2021) Swimming pool thermal energy storage, an alternative for distributed cooling energy storage. Energy Conversion and Management, 230. ISSN 0196-8904


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© 2020 The Author(s) The rise in distributed renewable energy generation creates a growing need to find viable solutions for energy storage to match energy demand and supply at any time. This paper evaluates the possibility of using swimming pools as a long-term cooling energy storage solution, i.e., Swimming Pool Thermal Energy Storage (SPTES). This technology allows a small building to store solar energy for cooling purposes in a yearly cycle, by filling the pool with ice slurry in winter and using that ice to cool the house in the summertime. Additionally, the pool can be used as a heat sink for a heat pump to heat the house during the winter. Results show that the energy storage cost of 0.078 US$ kWhe−1 is substantially smaller when compared with batteries (125 US$ kWhe−1). This makes SPTES a good alternative to support the development of 100% renewable energy systems in locations where the climate has a highly seasonal variation in temperature and the cooling demand is high in summer.

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