| 摘要 |
PROBLEM TO BE SOLVED: To provide a cold water circulation system capable of ensuring the reliability of temperature control and reducing power consumption.SOLUTION: A cold water circulation system includes: heat sources 10 each cooling cold water; AHUs 20 that are air conditioners each cooling air in a predetermined block F by heat exchange with the cold water; pumps 33 feeding the cold water from the respective heat sources 10 to the AHUs 20; and a control unit 41 that acquires an influence degree coefficient that is a contribution rate at which each AHU 20 controls an air temperature of a desired portion in the predetermined block F, that defines the AHUs 20 each having the influence degree coefficient equal to or higher than a predetermined first threshold as belonging to an air conditioner group, that calculates a margin indicating a surplus capacity of each AHU 20 of cooling the air on the basis of information indicating a state of each AHU 20 belonging to the air conditioning group, that calculates a group margin determined from the margin of each AHU 20 belonging to the air conditioning group, that reduces a flow volume of the cold water fed from each pump 33 if the group margin is equal to or higher than a predetermined second threshold, and that increases the flow volume of the cold water fed from each pump 33 if the group margin is lower than the predetermined second threshold. |
