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Cooling System for Data Processor With Flow Restricter in Secondary Loop to Limit Bypass-Cooling Water Flow

IP.com Disclosure Number: IPCOM000047315D
Original Publication Date: 1983-Oct-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Gallagher, KC: AUTHOR [+3]

Abstract

A flow restricter is located in the secondary cooling water system of a data processor in the bypass piping around the heat exchanger. The flow of water through the heat exchanger is controlled by a two-way control valve that is adjusted in response to the temperature of the water in the primary cooling loop. Cooling water that is not directed through the control valve to the heat exchanger is bypassed through the flow restricter. The flow restricter has a pressure/flow characteristic that is approximately linear below a threshold value of pressure and is essentially flat (constant flow rate) above the threshold value. This characteristic matches the requirements of the system.

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Cooling System for Data Processor With Flow Restricter in Secondary Loop to Limit Bypass-Cooling Water Flow

A flow restricter is located in the secondary cooling water system of a data processor in the bypass piping around the heat exchanger. The flow of water through the heat exchanger is controlled by a two-way control valve that is adjusted in response to the temperature of the water in the primary cooling loop. Cooling water that is not directed through the control valve to the heat exchanger is bypassed through the flow restricter. The flow restricter has a pressure/flow characteristic that is approximately linear below a threshold value of pressure and is essentially flat (constant flow rate) above the threshold value. This characteristic matches the requirements of the system. When the control valve is opened to increase flow through the heat exchanger, the pressure falls and the flow restricter reduces its bypass flow to a small value. When the control valve is adjusted to reduce flow through the heat exchanger, the pressure rises and the flow of bypassed coolant through the restricter rises. When the control valve is adjusted to its minimum flow, the flow restricter bypasses only a suitable maximum volume. In some cooling systems for data processing apparatus, water flows in a closed primary loop that includes (1) a cold plate that cools the transistors and (2) a heat exchanger that transfers heat to a secondary cooling loop. The secondary loop includes...