Cold water circulation system with control of supply of cold water based on degree of air handler surplus
First Claim
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.
1 Assignment
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Accused Products
Abstract
A chilled water circulation system includes a thermal source, an AHU, a pump, and a control section. The thermal source chills water to a specified temperature. The AHU cools air by heat exchange with the chilled water. The pump feeds the chilled water having a flow rate corresponding to an operating frequency of a power inverter to the AHU. The control section calculates a degree of surplus, which indicates surplus capacity of the AHU to cool air, on the basis of information indicating the state of the AHU. If the degree of surplus is not lower than the specified threshold, the control section controls the operating frequency of the power inverter, thereby decreasing the flow rate of the chilled water fed from the pump. If the degree of surplus is lower than the specified threshold, the control section increases the flow rate of the chilled water fed from the pump.
5 Citations
17 Claims
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1. A chilled water circulation system comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification