The performance of a multi-tank water storage was studied by experiment and computer simulation. The unit investigated consisted of three 270 L storage tanks connected in series and was charged through individual side-arm, natural convection heat exchangers. Laboratory tests were conducted on a specially instrumented prototype to characterize its performance in terms of temperature stratification, heat transfer and energy storage rates. Based on these tests, a computer model of a complete multi-tank solar thermal system was created. With this model, the performance of a multi-unit storage was compared to a single-tank system of equal total storage volume for a multi-family solar domestic hot water (SDHW) system application. Data were produced for two U.S. locations representative of differing climatic locations. Results show that a reasonably insulated multi-tank system can be used in place of a large single tank with only a small reduction in delivered solar energy.
Comparison of Multi-Tank and Large Single Tank Thermal Storages for Solar DHW Applications
Cruickshank, CA, & Harrison, SJ. "Comparison of Multi-Tank and Large Single Tank Thermal Storages for Solar DHW Applications." Proceedings of the ASME 2007 Energy Sustainability Conference. ASME 2007 Energy Sustainability Conference. Long Beach, California, USA. July 27–30, 2007. pp. 767-774. ASME. https://doi.org/10.1115/ES2007-36213
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