Heat pump hot water supply system, and control method and program thereof

摘要

There are provided a calculation unit (11) that calculates a first energy consumption amount of a heat pump hot water supply device (2) corresponding to each outgoing hot water temperature of the heat pump hot water supply device (2) when water incoming into the heat pump hot water supply device (2) is heated until an outgoing hot water temperature at an exit of a boiler (3) reaches a requested outgoing hot water temperature, and a second energy consumption amount of the boiler (3) corresponding to each boiler incoming water temperature when water incoming into the boiler (3) is heated until the outgoing hot water temperature at an exit of the boiler (3) reaches the requested outgoing hot water temperature; and an outgoing hot water temperature output unit (12) that estimates an operating point at which a total energy consumption amount, which is a sum of the first energy consumption amount and the second energy consumption amount, becomes minimum, sets the heat pump outgoing hot water temperature at the operating point as a target temperature, and outputs the target temperature to the heat pump hot water supply device (2) as the heat pump outgoing hot water temperature.