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Cold water circulation system with control of supply of cold water based on degree of air handler surplus

  • US 10,203,128 B2
  • Filed: 12/26/2013
  • Issued: 02/12/2019
  • Est. Priority Date: 12/28/2012
  • Status: Active Grant
First Claim
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1. A chilled water circulation system comprising:

  • a thermal source that cools chilled water to a specified temperature;

    at least one AHU (Air Handling Unit), which is an air conditioner that cools air by heat exchange with the chilled water;

    a pump that feeds the chilled water from the thermal source to the at least one AHU;

    a controller that calculates a degree of surplus, which indicates a surplus capacity of the at least one AHU to cool the air, on the basis of information indicating the state of the at least one AHU,the controller being configured to;

    decrease a flow rate of the chilled water fed out from the pump when the degree of surplus calculated by the controller is equal to or higher than a specified threshold; and

    increase the flow rate of the chilled water fed out from the pump when the degree of surplus calculated by the controller is smaller than the specified threshold.

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