Apparatus and method for adjusting coolant flow resistance through liquid-cooled electronics rack(s)
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G05D-015/00
H05K-007/20
출원번호
US-0265820
(2014-04-30)
등록번호
US-9655282
(2017-05-16)
발명자
/ 주소
Barringer, Wayne A.
Graybill, David P.
Iyengar, Madhusudan K.
Schmidt, Roger R.
Steffes, James J.
Weber, Jr., Gerard V.
출원인 / 주소
INTERNATIONAL BUSINESS MACHINES CORPORATION
대리인 / 주소
McNamara, Esq., Margaret A.
인용정보
피인용 횟수 :
0인용 특허 :
49
초록▼
A method is presented for adjusting coolant flow resistance through one or more liquid-cooled electronics racks. Flow restrictors are employed in association with multiple heat exchange tube sections of a heat exchange assembly, or in association with a plurality of coolant supply lines or coolant r
A method is presented for adjusting coolant flow resistance through one or more liquid-cooled electronics racks. Flow restrictors are employed in association with multiple heat exchange tube sections of a heat exchange assembly, or in association with a plurality of coolant supply lines or coolant return lines feeding multiple heat exchange assemblies. Flow restrictors associated with respective heat exchange tube sections (or respective heat exchange assemblies) are disposed at the coolant channel inlet or coolant channel outlet of the tube sections (or of the heat exchange assemblies). These flow restrictors tailor coolant flow resistance through the heat exchange tube sections or through the heat exchange assemblies to enhance overall heat transfer within the tube sections or across heat exchange assemblies by tailoring coolant flow. In one embodiment, the flow restrictors tailor a coolant flow distribution differential across multiple heat exchange tube sections or across multiple heat exchange assemblies.
대표청구항▼
1. A method of cooling a plurality of electronics racks, each electronics rack comprising a heat exchange assembly, the method comprising: obtaining a cooling apparatus comprising: a plurality of coolant supply lines and a plurality of coolant return lines coupled in fluid communication between a co
1. A method of cooling a plurality of electronics racks, each electronics rack comprising a heat exchange assembly, the method comprising: obtaining a cooling apparatus comprising: a plurality of coolant supply lines and a plurality of coolant return lines coupled in fluid communication between a coolant distribution unit and the heat exchange assemblies of the plurality of electronics racks, the coolant distribution unit supplying cooled system coolant for the heat exchange assemblies, wherein when operational, system coolant circulates in a closed loop between the coolant distribution unit and the heat exchange assemblies via, at least in part, the plurality of coolant supply lines and the plurality of coolant return lines; anda plurality of rack flow restrictors associated with at least one of the plurality of coolant supply lines, the plurality of coolant return lines, or the heat exchange assemblies of the plurality of electronics racks, each rack flow restrictor being associated with a respective coolant supply line of the plurality of coolant supply lines, a respective coolant return line of the plurality of coolant return lines, or a respective heat exchange assembly of the heat exchange assembles, for tailoring coolant flow resistance through the heat exchange assembly of the respective electronics rack, and wherein the plurality of rack flow restrictors tailor coolant flow resistance through at least one of the plurality of coolant supply lines, the plurality of coolant return lines, or the heat exchange assemblies to enhance overall heat transfer through the heat exchange assemblies of the plurality of electronics racks; andcooling the plurality of electronics racks, the cooling comprising: collecting rack power utilization data for each electronics rack of the plurality of electronics racks;summing the rack power utilizations of the plurality of electronics racks and determining a total coolant flow required to cool the plurality of electronics racks, and based on the total coolant flow required, automatically setting a rate of cooled system coolant supplied by the coolant distribution unit;determining the highest power utilizing electronics rack of the plurality of electronics racks and automatically setting the rack flow restrictor associated therewith to full open position;ascertaining coolant pressure and temperature information at the heat exchange assemblies of the plurality of electronics racks; andsetting rack flow restrictors associated with the remaining electronics racks of the plurality of electronics racks to ensure coolant exhausting from the heat exchange assemblies of the remaining electronics racks is in a super heated vapor state within a specified range of superheated temperatures based on the collected coolant pressure and temperature information. 2. The method of claim 1, wherein setting the rack flow restrictors tailors a coolant flow distribution differential through the heat exchange assemblies of the remaining electronics racks, the coolant flow distribution differential being tailored based on rack-level power consumption of the remaining electronics racks. 3. The method of claim 1, wherein setting the rack flow restrictors defines different coolant flow resistances through at least two heat exchange assemblies of the remaining electronics racks. 4. The method of claim 1, wherein at least one rack flow restrictor of the plurality of rack flow restrictors comprises at least one adjustable rack flow restrictor, each adjustable rack flow restrictor of the at least one adjustable rack flow restrictor comprising a dynamically adjustable orifice opening size for dynamically adjusting system coolant flow resistance through the respective heat exchange assembly. 5. The method of claim 1, wherein the cooling apparatus comprises coolant pressure and temperature sensors associated with at least one of the plurality of coolant supply lines, the plurality of coolant return lines, or the heat exchange assemblies of the plurality of electronics racks for sensing the pressure and temperature of system coolant passing therethrough. 6. The method of claim 1, wherein the cooling apparatus comprises a controller, the controller automatically facilitating performing the cooling, including the collecting, the summarizing, the determining, the ascertaining and the setting. 7. A method of cooling an electronics rack comprising a heat exchange assembly with a plurality of heat exchange tube sections, the method comprising: providing a cooling apparatus comprising: multiple temperature sensors and multiple pressure sensors, each associated with a respective heat exchange tube section of the heat exchange assembly for monitoring temperature and pressure of coolant passing therethrough;multiple flow restrictors associated with the plurality of heat exchange tube sections, each flow restrictor of the multiple flow restrictors being associated with a respective heat exchange tube section of the plurality of heat exchange tube sections for tailoring coolant flow resistance through the respective heat exchange tube section based, at least in part, on pressure and temperature of coolant passing through the respective heat exchange tube section; anda rack control unit configured to control coolant flow through the multiple heat exchange tube sections of the heat exchange assembly, the rack control unit being configured to: collect rack section power utilization data for a plurality of rack sections of the electronics rack, each rack section having an associated heat exchange tube section of the plurality of heat exchange tube sections;determine a highest power utilizing rack section within the electronics rack and set the flow restrictor of the associated heat exchange tube section of that rack section to full open position;set flow restrictors associated with the remaining heat exchange tube sections of the heat exchange assembly to ensure coolant exhausting from the remaining heat exchange tube sections is in superheated vapor state within a specified range of superheated temperatures based on the collected coolant pressures and temperatures. 8. The method of claim 7, wherein the controller is further configured to initially set the flow restrictors to a common initial pre-defined open position. 9. The method of claim 8, wherein the common predefined open position is 50% open. 10. The method of claim 7, further comprising subsequently repeating the collecting, the determining and the setting.
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