Heating and Cooling energy system with storage has become more and more popular in air conditioning system of buildings because of available inexpensive electoric night charge and decreasing electoric peak demand. In order to operate storage system adequately, it is necessary to contorol storaged energy turning on/off of heat source equipments. In this report contorol strategy of popularized contoroller for storage system based on operation hours of heat source equipments. Lastly contorolability of this contoroller is confirmed and discussed by the methods of simulation and field test using proto-type of controller.
