Cooling system with enhanced low ambient application for low boiling refrigerant

Abstract

A method for activating a pump operation circuit of a cooling system may include receiving outdoor temperature data from an outdoor temperature sensor and receiving a predetermined outdoor temperature threshold. The method may include determining whether the received outdoor temperature data exceeds the received predetermined outdoor temperature threshold by comparing the received outdoor temperature data to the received predetermined outdoor temperature threshold. Upon determining the received outdoor temperature does not exceed the received predetermined outdoor temperature threshold, the method may include generating one or more control signals configured to cause a compressor of a computer room air conditioning unit to be idled and generating one or more control signals configured to cause a pump to be activated.

What is claimed is: 
     
         1 . A method for activating a pump operation circuit of a cooling system, the method comprising:
 receiving outdoor temperature data from a temperature sensor;   receiving a predetermined outdoor temperature threshold;   determining whether the outdoor temperature data received exceeds the predetermined outdoor temperature threshold received by comparing the outdoor temperature data received to the predetermined outdoor temperature threshold received, wherein the outdoor temperature data exceeds the predetermined outdoor temperature threshold received when the outdoor temperature data received is at least one of less than or equal to the predetermined outdoor temperature threshold received;   upon determining the outdoor temperature data received does not exceed the predetermined outdoor temperature threshold received, generating one or more control signals configured to cause a compressor of a computer room air conditioning (CRAC) unit to be idled; and   generating one or more control signals configured to cause a pump to be activated.   
     
     
         2 . The method of  claim 1 , further comprising:
 receiving one or more cooling requests from a user.   
     
     
         3 . The method of  claim 2 , wherein the one or more cooling requests include a pump time. 
     
     
         4 . The method of  claim 3 , further comprising:
 receiving a pump start time from a pump timer;   receiving a pump cycle time from the pump timer;   determining whether the pump time has elapsed by comparing the pump start time and the pump cycle time;   upon determining the pump time has elapsed, generating one or more control signals configured to cause the compressor of the CRAC unit to be activated; and   generating one or more control signals configured to cause the pump to be idled.   
     
     
         5 . The method of  claim 1 , wherein the temperature sensor includes a plurality of outdoor temperature sensors. 
     
     
         6 . The method of  claim 2 , further comprising:
 generating one or more control signals configured to cause the pump to be modulated based on the one or more cooling requests received.   
     
     
         7 . The method of  claim 1 , further comprising:
 upon determining the outdoor temperature data received exceeds the predetermined outdoor temperature threshold received, generating one or more control signals configured to cause the pump to be idled; and   generating one or more control signals configured to cause the compressor of the CRAC unit to be activated.   
     
     
         8 . A cooling system comprising:
 a computer air conditioning (CRAC) unit;   a refrigerant pump coupled to the CRAC unit, wherein the refrigerant pump is configured to provide a refrigerant liquid to the CRAC unit;   a condenser coupled to the CRAC unit, wherein the condenser is configured to cool the refrigerant liquid provided; and   one or more controllers communicatively coupled to the CRAC unit and the refrigerant pump, wherein the one or more controllers include one or more processors including a set of program instructions configured to cause the one or more processors to:
 receive outdoor temperature data from a temperature sensor; 
 receive a predetermined outdoor temperature threshold; 
 determine whether the outdoor temperature data received exceeds the predetermined outdoor temperature threshold received by comparing the outdoor temperature data received to the predetermined outdoor temperature threshold received, wherein the outdoor temperature data received exceeds the predetermined outdoor temperature threshold received when the outdoor temperature data received is at least one of less than or equal to the predetermined outdoor temperature threshold received; 
 upon determining the outdoor temperature data received does not exceed the predetermined outdoor temperature threshold received, generate one or more control signals configured to cause a compressor of the CRAC unit to be idled; and 
 generate one or more control signals configured to cause the refrigerant pump to be activated. 
   
     
     
         9 . The cooling system of  claim 8 , wherein the one or more processors are further configured to:
 receive one or more cooling requests from a user, wherein the one or more cooling requests include a pump time.   
     
     
         10 . The cooling system of  claim 9 , wherein the one or more processors are further configured to:
 receive a pump start time from a pump timer;   receive a pump cycle time from the pump timer;   determine whether the pump time has elapsed by comparing the pump start time and the pump cycle time;   upon determining the pump time has elapsed, generating one or more control signals configured to cause the compressor of the CRAC unit to be activated; and   generate one or more control signals configured to cause the refrigerant pump to be idled.   
     
     
         11 . The cooling system of  claim 8 , wherein the temperature sensor includes a plurality of outdoor temperature sensors. 
     
     
         12 . The cooling system of  claim 9 , wherein the one or more processors are further configured to:
 generating one or more control signals configured to cause the refrigerant pump to be modulated based on the one or more cooling requests received.   
     
     
         13 . The cooling system of  claim 8 , wherein the one or more processors are further configured to:
 upon determining the outdoor temperature data received exceeds the predetermined outdoor temperature threshold received, generating one or more control signals configured to cause the refrigerant pump to be idled; and   generate one or more control signals configured to cause the compressor of the CRAC unit to be activated.   
     
     
         14 . A cooling system comprising:
 one or more controllers communicatively coupled to a computer room air conditioning (CRAC) unit and a refrigerant pump, wherein the one or more controllers include one or more processors include a set of program instructions configured to cause the one or more processors to:
 receive outdoor temperature data from a temperature sensor; 
 receive a predetermined outdoor temperature threshold; 
 determine whether the outdoor temperature data received exceeds the predetermined outdoor temperature threshold received by comparing the outdoor temperature data received to the predetermined outdoor temperature threshold received, wherein the outdoor temperature data received exceeds the predetermined outdoor temperature threshold received when the outdoor temperature data received is at least one of less than or equal to the received predetermined outdoor temperature; 
 upon determining the outdoor temperature data received does not exceed the predetermined outdoor temperature threshold received, generate one or more control signals configured to cause a compressor of the CRAC unit to be idled; and 
 generate one or more control signals configured to cause the refrigerant pump to be activated. 
   
     
     
         15 . The cooling system of  claim 14 , wherein the one or more processors are further configured to:
 receive one or more cooling requests from a user, wherein the one or more cooling requests include a pump time.   
     
     
         16 . The cooling system of  claim 15 , wherein the one or more processors are further configured to:
 receive a pump start time from a pump timer;   receive a pump cycle time from the pump timer;   determine whether the pump time has elapsed by comparing the pump start time and the pump cycle time;   upon determining the pump time has elapsed, generating one or more control signals configured to cause the compressor of the CRAC unit to be activated; and   generate one or more control signals configured to cause the refrigerant pump to be idled.   
     
     
         17 . The cooling system of  claim 14 , wherein the temperature sensor includes a plurality of outdoor temperature sensors. 
     
     
         18 . The cooling system of  claim 15 , wherein the one or more processors are further configured to:
 generating one or more control signals configured to cause the refrigerant pump to be modulated based on the one or more cooling requests received.   
     
     
         19 . The cooling system of  claim 14 , wherein the one or more processors are further configured to:
 upon determining the outdoor temperature data received exceeds the predetermined outdoor temperature threshold received, generating one or more control signals configured to cause the refrigerant pump to be idled; and   generate one or more control signals configured to cause the compressor of the CRAC unit to be activated.