Influence of occupant behaviour on oversizing issue of heat pumps for residential district in Hot Summer and Cold Winter zone of China

Abstract A key aspect of Ground source heat pump (GSHP) is sizing of capacity, which has a signifi-cant influence on energy efficiency, energy consumption and initial investment of system. The capacity of heat pump for residential district should be consistent with cooling and heating load of residential district. However, field measurements and spot interviews indicate that the oversizing issue of GSHP is common for residential district in Hot Summer and Cold Winter zone. The current method of designing the capacity does not take the influence of occupant behavior into consideration. This paper establishes the model by DeST (Designer’s Simulation Toolkits) software considering the different occupant behavior with different Air-conditioning unit (AC) units and it recommends designing the different capacity of the GSHP systems with different types of AC units.