The integration of latent heat storage solutions into modern domestic heating systems has the potential
to enhance the overall system performance compared to standard hot-water systems (radiators and
tanks) due to augmentation of the stored heat by the latent heat of a suitable material. This paper
presents computational prediction and experimental validation of the dynamic behaviour and
performance of an active thermal storage system for domestic applications, based on the use of a
hydrated salt PCM. The thermal extraction and heating rates for the PCM tank are compared to a water
filled tank. Flow and temperature fields are analysed in a customised storage tank design for heat
transfer and performance characterisation. Experimental findings show excellent agreement with the
3D CFD simulation results. The heat removal performance has been identified as being the limiting
factor when compared to a water-based system. It is also confirmed that the PCM solution has the
capability to store a large amount of heat effectively but design improvements are required to
eliminate the cooling limited heat transfer process in the current apparatus.