US 9,811,126 B2
Energy efficient data center liquid cooling with geothermal enhancement
Timothy J. Chainer, Putnam Valley, NY (US); and Pritish R. Parida, Fishkill, NY (US)
Assigned to INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US)
Filed by Timothy J. Chainer, Putnam Valley, NY (US); and Pritish R. Parida, Fishkill, NY (US)
Filed on Oct. 4, 2011, as Appl. No. 13/252,888.
Prior Publication US 2013/0081781 A1, Apr. 4, 2013
Int. Cl. G06F 1/20 (2006.01); H05K 7/20 (2006.01)
CPC G06F 1/20 (2013.01) [H05K 7/2079 (2013.01); H05K 7/20654 (2013.01); G06F 2200/201 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method comprising:
operating a data center cooling system in a first mode, said data center cooling system having an indoor portion wherein heat is absorbed from components in said data center by a pumped heat transfer liquid, said data center cooling system having an outdoor heat exchanger portion and a geothermal heat exchanger portion, said first mode comprising geothermal cooling of said pumped heat transfer liquid in said geothermal heat exchanger portion only;
determining, based on measured temperature of said pumped heat transfer liquid entering said indoor portion exceeding a first maximum allowable value, and further based on ground temperature adjacent said geothermal heat exchanger portion being less than a second maximum allowable value, that a switch should be made from said first mode to a second mode; and
responsive to said determining, switching said data center cooling system to said second mode, said second mode being different than said first mode, said second mode comprising ambient air cooling of said pumped heat transfer liquid in said outdoor heat exchanger portion and said geothermal cooling of said pumped heat transfer liquid in said geothermal heat exchanger portion.