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Cooling System for Data Processor With Provisions for Reducing Coolant Flow During Operation at Reduced Load

IP.com Disclosure Number: IPCOM000046675D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Gallagher, KC: AUTHOR [+3]

Abstract

In a data processing system, a temperature sensor is located in the primary loop that carries cooling water through cold plates that are in contact with semiconductor devices, and a control valve is located in the secondary loop that carries chilled water to a heat exchanger that couples the two loops. Thus, the flow of chilled water in the secondary loop is varied with the heat load of the processors. In one example, a shutoff valve is installed in the bypass piping to the control valve. This provision is particularly useful where a number of coolant distribution units are serviced by a common chilled water system. Closing of this shutoff valve reduces the flow of chilled water in the secondary loop to each unit.

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Cooling System for Data Processor With Provisions for Reducing Coolant Flow During Operation at Reduced Load

In a data processing system, a temperature sensor is located in the primary loop that carries cooling water through cold plates that are in contact with semiconductor devices, and a control valve is located in the secondary loop that carries chilled water to a heat exchanger that couples the two loops. Thus, the flow of chilled water in the secondary loop is varied with the heat load of the processors. In one example, a shutoff valve is installed in the bypass piping to the control valve. This provision is particularly useful where a number of coolant distribution units are serviced by a common chilled water system. Closing of this shutoff valve reduces the flow of chilled water in the secondary loop to each unit. In a second example, the control valve is automatically driven to a closed position when the processor is turned off. This second provision, when coupled with the first, eliminates the flow of chilled water in the secondary loop completely since the processor does not require cooling. In many data processing installations, a single processor is cooled from a single coolant distribution unit. Conventionally, chilled water flows at a constant rate in the secondary loop and the flow is regulated in the primary loop to maintain a constant temperature in the water that discharges from the cold plates that cool the circuits. In an installation having a...