08 November 2017
The heat load characteristics of ZEB-oriented buildings were analysed to survey the effects of ZEB on the building heat load. ZEB reduces the annual integral heat load and maximum heat load and lowers the ratio of the heat load to the maximum heat load. A major factor for a lower heat load is the reduction of the room sensible heat load, and it was found that this would cause changes to the reduction of the sensible heat ratio and the cooling/heating ratio of the heat load. In response to these effects, technological development required for heat pumps was considered. Here we describe a full product lineup of low-capacity heat pumps, improvement operation efficiency under partial load, standby power and energy consumption of auxiliary devices for heat transfer.