초록 ▼

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; es

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.

대표청구항 ▼

[ What is desired to be secured for Letters Patent of the United States is set forth in the following claims:] [1.]1. A chiller system including a chilled fluid loop where the temperature of the fluid is controlled by varying the capacity of a chiller comprising:a variable capacity chiller including

[ What is desired to be secured for Letters Patent of the United States is set forth in the following claims:] [1.]1. A chiller system including a chilled fluid loop where the temperature of the fluid is controlled by varying the capacity of a chiller comprising:a variable capacity chiller including an evaporator;a chilled fluid loop in heat transfer relation with the evaporator;a sensor measuring the leaving fluid temperature of the evaporator;a sensor measuring the entering fluid temperature of the evaporator;a mechanism for providing a desired leaving fluid temperature;a pump controlling the rate of fluid flow in the fluid loop; anda controller operably controlling the chiller capacity and the variable flow rate of the pump, the controller being connected to the setpoint mechanism and the entering and leaving fluid temperature sensors;wherein the controller includes a feedback loop controlling chiller capacity in response to leaving fluid temperature and wherein the controller includes a feed forward loop controlling chiller capacity in response to entering fluid temperature.