HOT WATER SUPPLY SYSTEM

Japanese Patent JP3763909

B2

PROBLEM TO BE SOLVED: To perform stabilization control of the temperature of delivery hot water by correcting the shift of feedforward heat quantity. SOLUTION: A feedforward control means 15 sets a feedforward heat quantity required for elevating the temperature of supply water to a set level. A feedback control means 16 sets a feedback heat quantity for offsetting the difference of the temperature of delivery hot water from the set temperature. A correction coefficient updating/correcting section 21 updates/corrects a correction coefficient K by subtracting a correction value α when the feedforward heat quantity deviates from a fluctuation allowable range on the + or - side. A feedforward heat quantity correcting section 22 corrects the feedforward heat quantity by multiplying a feedforward heat quantity being set by the feedforward control means 15 by a correction coefficient. A burning control section 17 controls the burning heat quantity for hot water supply based on a total heat quantity, i.e. the sum of a corrected feedforward heat quantity and a feedback heat quantity.