A multi-tank, water-based, thermal storage system was assembled in a laboratory setting, and charge and discharge tests were conducted for both series and parallel interconnections. During testing both thermal charge rates and temperature profiles were recorded and the level of stratification observed. Individual storage tanks in the multi-tank system were charged through separate, natural convection, side-arm heat exchangers fitted to each tank. Result show that, for the conditions evaluated, high levels of temperature stratification were obtained in both the series and parallel connected configurations. In addition, charge rates for the parallel configuration were higher than with the series configuration, however, overcoming flow-imbalances in the parallel system proved to be a major challenge.

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Conference Solar 2006: Renewable Energy - Key to Climate Recovery, Including 35th ASES Annual Conference, 31st ASES National Passive Solar Conference, 1st ASES Policy and Marketing Conference and ASME Solar Energy Division International Solar Energy Conference
Cruickshank, C, & Harrison, S. (Stephen). (2006). Experimental analysis of stratified multi-tank thermal storage configurations for solar heating systems. In American Solar Energy Society - Solar 2006: 35th ASES Annual Conf., 31st ASES National Passive Solar Conf., 1st ASES Policy and Marketing Conf., ASME Solar Energy Division Int. Solar Energy Conference (pp. 112–117).