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

Hunt, J. ORCID: https://orcid.org/0000-0002-1840-7277, Zakeri, B. ORCID: https://orcid.org/0000-0001-9647-2878, Leal Filho, W., Schneider, P.S., de Assis Brasil Weber, N., Vieira, L.W., Ermel, C., de Castro, N.J., Barbosa, P.S.F., Nascimento, A., & Mastrucci, A. ORCID: https://orcid.org/0000-0002-5611-7780 (2021). Swimming pool thermal energy storage, an alternative for distributed cooling energy storage. Energy Conversion and Management 230 E113796. 10.1016/j.enconman.2020.113796.

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Abstract

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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