Energy efficient CRAC unit operation
First Claim
1. A method for controlling one or more computer room air conditioning (CRAC) units for energy efficient operation, said one or more CRAC units being configured to receive return air, said method comprising:
- detecting the temperature of the air returned (Trat) into the one or more CRAC units;
determining whether the Trat is within a predetermined setpoint temperature range; and
reducing at least one operation of the one or more CRAC units in response to the Trat being within the predetermined setpoint temperature range to thereby increase the efficiencies of the one or more CRAC units.
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Accused Products
Abstract
A method for controlling one or more computer room air conditioning (CRAC) units configured to receive return air for energy efficient operation. In the method, the temperature of the air returned (Trat) into the one or more CRAC units is detected. It is determined whether the Trat is within a predetermined setpoint temperature range and at least one operation of the one or more CRAC units is reduced in response to the Trat being within the predetermined setpoint temperature range to thereby increase the efficiencies of the one or more CRAC units.
77 Citations
35 Claims
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1. A method for controlling one or more computer room air conditioning (CRAC) units for energy efficient operation, said one or more CRAC units being configured to receive return air, said method comprising:
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detecting the temperature of the air returned (Trat) into the one or more CRAC units;
determining whether the Trat is within a predetermined setpoint temperature range; and
reducing at least one operation of the one or more CRAC units in response to the Trat being within the predetermined setpoint temperature range to thereby increase the efficiencies of the one or more CRAC units. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A computer room air conditioning (CRAC) unit comprising:
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a return air temperature sensor; and
a controller configured to compare the temperature of the return air (Trat) with a predetermined setpoint temperature range, wherein the controller is further configured to reduce at least one operation of the CRAC unit in response to the Trat being within the predetermined setpoint temperature range. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. A system for controlling a computer room air conditioning (CRAC) unit, said system comprising:
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means for detecting a temperature of air returned (Trat) into the CRAC unit;
means for determining whether the Trat is within a predetermined setpoint temperature range, said means for determining also including means for reducing at least one operation of the CRAC unit in response to the Trat being within the predetermined setpoint temperature range. - View Dependent Claims (29, 30, 31)
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32. A computer readable storage medium on which is embedded one or more computer programs, said one or more computer programs implementing a method for controlling a computer room air conditioning (CRAC) unit for energy efficient operation, said CRAC unit being configured to receive return air, said one or more computer programs comprising a set of instructions for:
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detecting the temperature of the air returned (Trat) into the CRAC unit;
determining whether the Trat is within a predetermined setpoint temperature range; and
reducing at least one operation of the CRAC unit in response to the Trat being within the predetermined setpoint temperature range to thereby increase the efficiency of the CRAC unit. - View Dependent Claims (33, 34)
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35. A system for energy efficient computer room air conditioning (CRAC) unit operation, said system comprising:
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a plurality of CRAC units;
one or more of the plurality of CRAC units being configured with at least one of a three-way valve and a two-way valve to control coolant delivery into a cooling coil of the one or more of the CRAC units, wherein the plurality of CRAC units are configured to be operated to enable the one or more of the plurality of CRAC units to maintain the at least one of the three-way valve and the two-way valve substantially at 100% open positions to thereby reduce energy usage by the one or more of the plurality of CRAC units.
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Specification