This document from 2008 looks into the efficiency of the design of hot water storage in solar thermal cooling facilities in single family buildings. Solar thermal installations, and in particular oversized facility elements, could result in higher costs and a lower than anticipated performance.
This paper identifies the thermal storage tank volume as one of the elements that needs further optimisation. A simulation study has been conducted to look into this issue which consisted of monitoring a multipurpose solar thermal facility in relation to air conditioning, domestic hot water and space heating.