Hot water supply system, hot water supply control method, hot water supply device and hot water supply control program

摘要

To enhance heat storage use efficiency and reduce pressure loss to enable efficient hot water supply.SOLUTION: A hot water supply system includes: a thermal storage tank (8) for storing a heating medium (ME1); a heat exchanger (10) for exchanging heat of the heating medium with supply water; a temperature sensor (22) for detecting a temperature of the heating medium circulating in the heat exchanger; water amount control means (water amount control section 12) for distributing the supply water to the heat exchanger and a bypass passage (bypass pipe 16) and controlling the distribution amount of the supply water caused to flow in the heat exchanger and the bypass passage; a pump (9) for circulating the heating medium in the thermal storage tank to the heat exchanger through a circulation passage; and a control section (20) that determines whether hot water delivery at a set temperature is possible based on a detection temperature of the heating medium, controls the distribution amount of the supply water caused to flow in the heat exchanger and the bypass passage by the water amount control means to a fixed value or releases water flowing in the heat exchanger when hot water supply at the set temperature cannot be performed, and controls the heating medium circulation in the heat exchanger to a target temperature set lower than the detection temperature of the heating medium only by a predetermined temperature.SELECTED DRAWING: Figure 1