Paper No 165 – Energy flexibility of capacity-controlled air-source heat pumps using rule-based control in residential nZEB – 13th IEA Heat Pump Conference, Jeju, Korea
The reduction of operational heating costs by deploying the building flexibility is investigated using a predictive rule-based control and building simulations. This paper focuses on the applicability of a proposed price-based control strategy in different buildings and climate zones where also electricity spot prices differ. More specifically, the operational costs of a heat pump system in a Norwegian and Swiss residential singlefamily house are compared. The aim of the price-based control is to shift the operation of an air-to-water heat pump to times when electricity spot prices are low. The results show, that the success of the control strategy with regard to operational cost savings is highly dependent on the hourly fluctuations of the electricity spot price. Furthermore, it is shown that also the design of the heating system as well as the chosen temperature setpoints of the control influence the outcome substantially. Results show, that a 5% cost reduction can be achieved even though the electricity use increases.