| 摘要 |
PROBLEM TO BE SOLVED: To provide a feed water warming system using a heat pump, in which the heat pump is efficiently operated.SOLUTION: To a feed water tank 3 of a boiler 2, water can be fed through a water feed path 8 via a condenser 14 of a heat pump 4 and, at the same time, water can be fed through a water replenishment path 9 not through the condenser 14. On the basis of the operation state of the boiler 2 or a water feed state from the feed water tank 3 to the boiler 2, water feed to the feed water tank 3 via the water feed path 8 and an output of the heat pump 4 are controlled. The flowing volume of water to the condenser 14 is preferably adjusted such that an output side water temperature of the condenser 14 of the heat pump 4 is maintained at the set temperature during the water feed to the feed water tank 3 via the water feed path 8. |
