Patent ID: 7584021

Claim:
A method for controlling one or more air conditioning units for energy efficient operation, said one or more air conditioning units being configured to receive return air, cool said received air and supply the cooled air, said method comprising: detecting the temperature of the air returned (Trat) into the one or more air conditioning units; detecting the temperature of the air supplied (Tsat) by the one or more air conditioning units; calculating a caloric heat transfer level (Q) based upon the Trat and the Tsat; determining whether the Q is within a predetermined setpoint caloric heat transfer range; determining whether the Q is below a minimum setpoint caloric heat transfer level in response to the Q being outside the predetermined setpoint caloric heat transfer range; determining a volume flow rate of air supplied by the one or more air conditioning units; comparing the volume flow rate of air with a flow rate setpoint; increasing the volume flow rate of air supplied by the one or more air conditioning units in response to the flow rate falling below the volume flow rate of air setpoint; and causing the one or more air conditioning units to enter into a reduced power mode in response to the Q being below the minimum setpoint caloric heat transfer level.