Analysis of Electricity Usage for Domestic Heating Based on an Air-To-Water Heat Pump in a Real World Context

In this paper a new computational model to estimate the performance of an air to water heat pump in relation to outdoor temperatures is proposed and evaluated. This model is an extension and refinement of a model proposed in previous work. In the new model the following has been taken into account. Real empirical data for usage of a heat pump over a whole heating season have been used to obtain accurate parameter values. The energy which is used for heating sanitation water for the bathroom is taken into account in a separate submodel. According to some reports, around 15% of domestic energy usage is for hot water. From the empirical data set, the fraction of energy which is consumed for this purpose is known, and it is used to model the usage for sanitation water heating as separate from the usage for heating. In this model the amount of energy which is used to keep the system working (active standby mode) is taken into account as well. The now available empirical data for the whole heating season have been used to estimate the parameter values for this model on the one hand and validation on the other hand.