| 摘要 |
PROBLEM TO BE SOLVED: To utilize dump power which cannot be sold without decreasing durability.SOLUTION: A hot water supply system 1 can operate a hot water supply device 5 by purchased electric power from a system 2 or by generated output generated with a sunlight panel 3. The hot water supply system 1 can sell the generated output to the system 2. When the generated output cannot be sold, surplus power is generated. A power conditioner 4 or a tank controller 11 sets available electric power based on the surplus power. A heat pump controller 12 decides and controls a target discharge temperature and a rotating speed of a compressor 14 so that a target boiling temperature is carried out based on an available electric power and under a restriction of the available electric power. A rotating speed of the compressor 14 is controlled by a feedforward control in startup. After having driven in an appointed time, feedback control of the rotating speed of the compressor 14 is performed based on the available electric power. |
