Reducing energy consumption and increasing use of renewable energy in the building sector is crucial to the mitigationof climate change. Wind power driven heat pumps have been considered as a sustainable measure to supply heat forthe detached houses, especially those that even don’t have access to the grid. This work is to investigate the dynamic performance of a heat pump system directly driven by a wind turbine. The heat demand of a detached single familyhouse was simulated in details. To handle the intermittent characteristic of wind power, an electric energy storage system was included. According to the simulations, the wind turbine itself cannot always satisfy the electricity demand of the heat pump, and a larger size of the energy storage system can reduce the probability of load loss. However, it is different from the energy storage system that increasing the capacity of wind turbines may increase the probability of load loss instead, due to the different start-up speed of wind turbines. In order to maximize the system benefit, the capacity of the wind turbine and the size of the energy storage system should be optimized simultaneously based on dynamic simulations.