Incorporation of controllable supercooled phase change material heat storage with a solar assisted heat pump: Testing of crystallization triggering and heating demand-based modelling study

Thermal management of using crystallization-controllable supercooled PCM in space heating applications for different heating profiles in the UK

“…However, this short-term load shifting may not work very well if solar energy is the main heat source for the heat pump. Supercooled PCM can be effectively used for variable solar profiles as it can allow storage solar assisted heat pump's heat even for a week period at room temperature and still having some proportion of the latent heat [10]. Moreover, in order to increase the effectiveness of PCM usage in heat storage systems, controllable heat discharge can be key for more efficient systems because performance of using PCM in water tanks is dependent on the operating conditions [11].…”

“…Englmair et al [21] investigated on-demand crystallisation of SAT in solar combi system, they calculated that annual solar fraction of 71% can be achieved by using 22.4 m 2 collector area and 1 m 3 PCM storage in a Danish passive house. Recently, Kutlu et al [10] carried out a simulation study of a solar-assisted heat pump unit with controllable SAT to provide space heating to a building. They presented that PCM J o u r n a l P r e -p r o o f storage tank can be charged in 6.5 hours and the stored tank can provide one-day heating, which will promote solar assisted heat pump instead of an air source heat pump.…”

“…On the other hand, these houses are conventional houses in the UK, but the number of ecohouses or low-carbon houses has increased over the world to reduce heating costs and CO2 emissions, thus, to extend the impact and range of the study, the data from our previous study [10] has been used in order to show another heating profile. In the previous study, one of the Creative Energy Homes at the University of Nottingham on Park Campus a low-carbon building, The David Wilson Millennium Eco-house was simulated [24].…”

“…The PCM tube is divided into radial elements from centre to edge, thus, conduction heat transfer happens between PCM elements. The PCM storage tank calculation procedure is based on the validated previous study[10].…”