Domestic hot water heat pump: Modelling, analysis and flexibility assessment

The current study deals with a demonstration of how buildings can support the power system during power deficit conditions, with a focus on using domestic hot water heat pumps as a flexibility resource. A vapour compression heat pump cycle is used for estimating the performance of the heat pump during different operating conditions. Furthermore, this model is integrated with a state space model of the domestic hot water tank considering stratification. The result shows that the domestic hot water heat pump under study can provide flexibility by consuming no electricity for nearly two hours, without compromising the thermal comfort. This is realised by reducing the set point temperature of water by 5°C.