Chiller capacity control with variable chilled water flow compensation
AssigneeAmerican Standard Inc.
InventorLee L. Sibik
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Abstract
A method of controlling chiller capacity in a chiller system. The method comprises the steps of: measuring entering the fluid temperature of a fluid entering a heat exchanger; measuring the fluid temperature of the fluid leaving the heat exchanger; determining a desired leaving fluid temperature; establishing chiller capacity as a function of the difference between leaving fluid temperature and the desired leaving fluid temperature; and adjusting the determined chiller capacity as a function of the difference between entering fluid temperature and the desired leaving fluid temperature.
Claims14
A method of controlling chiller capacity in a chiller system comprising the steps of:
- measuring entering the fluid temperature of a fluid entering a heat exchanger;
- measuring the fluid temperature of the fluid leaving the heat exchanger;
- determining a desired leaving fluid temperature;
- establishing chiller capacity as a function of the difference between leaving fluid temperature and the desired leaving fluid temperature;
- and
- adjusting the determined chiller capacity as a function of the difference between entering fluid temperature and the desired leaving fluid temperature.
A method of controlling chiller capacity and chilled water flow rate in the chiller system including an evaporator, the method comprising the steps of:
- determining a leaving water temperature of chiller water leaving the evaporator;
- determining an entering water temperature of chilled water entering the evaporator;
- controlling the speed of a variable flow pump as a function of the entering water temperature;
- controlling the capacity of a chiller system, as a function of the entering water temperature and as a function of the leaving water temperature.
Dependencies are inferred from the claim text.