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Dual Temperature Computer Room Water Conditioning Unit for Supplying Cooling Water to Electronics Frames at Two Different Temperatures

IP.com Disclosure Number: IPCOM000126446D
Original Publication Date: 2005-Jul-18
Included in the Prior Art Database: 2005-Jul-18
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Abstract

A computer room water conditioning (CRWC) unit to provide cooling water at two different temperatures is disclosed. A primary water-to-water heat exchanger is used to reject the total heat load from system water to facility chilled water. A secondary water-to-water heat exchanger utilizes sensible heat of the system cooling water from one set of electronics frames to raise the system cooling water to a higher temperature required by a second set of electronic frames.

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Dual Temperature Computer Room Water Conditioning Unit for Supplying Cooling Water to Electronics Frames at Two Different Temperatures

A computer room water conditioning (CRWC) unit to provide cooling water at two different temperatures is disclosed. The invention is shown schematically in the figure. The system heat load to water is rejected to customer supplied chilled water via a primary heat exchanger. The heated system return water flows through one side of the primary heat exchanger and customer chilled water flows through the other side. The temperature (T1) of the system water exiting the primary heat exchanger is controlled by using a mixing valve to regulate the amount of customer chilled water that is passed through the primary heat exchanger. The action of the mixing valve is controlled by sensing the temperature, T1, of the system water distributed via flexible lines to the electronics Type 1 frames that utilize closed circuit air-to-water cooling. The water exiting these frames at temperature T2, which is still below that required for use in the Type 2 frames with cold plate cooled electronics, is returned to the CRWC and passed through the cold side of a secondary heat exchanger where it is heated up to temperature T3 for distribution to the Type 2 electronics frames. The water exits these frames at temperature T4, the highest temperature water in both system loops. This water is returned to the CRWC where some of it passes through the hot side of...