Browse Prior Art Database

Improved Cooling System for Rack-Mounted Equipment

IP.com Disclosure Number: IPCOM000034930D
Original Publication Date: 1989-May-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 73K

Publishing Venue

IBM

Related People

Paturet, J: AUTHOR

Abstract

This article describes an improved way of cooling electronic equipment mounted in a 19" rack. It avoids the cumulative air temperature rise which occurs in a conventional cooling system. In a conventional cooling system (Fig. 1) air enters the rack via an air intake at the bottom of the rack. The air, which exits via the top of the rack, is relatively hot because it is cumulatively heated by each of the card cages in the rack. The system proposed (Figs. 2 and 3) allows fresh air to be draw in from the front of the rack by air intakes at the bottom card cage. The air then flows through the card cage and the power supply (if required) and exits via the lower part of the air intake above. A "V-shaped" deflector (see Fig.

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Improved Cooling System for Rack-Mounted Equipment

This article describes an improved way of cooling electronic equipment mounted in a 19" rack. It avoids the cumulative air temperature rise which occurs in a conventional cooling system. In a conventional cooling system (Fig. 1) air enters the rack via an air intake at the bottom of the rack. The air, which exits via the top of the rack, is relatively hot because it is cumulatively heated by each of the card cages in the rack. The system proposed (Figs. 2 and
3) allows fresh air to be draw in from the front of the rack by air intakes at the bottom card cage. The air then flows through the card cage and the power supply (if required) and exits via the lower part of the air intake above. A "V-shaped" deflector (see Fig. 2) prevents the air warmed by a lower card cage from entering the air intake of the card cage above, thus:

(Image Omitted)

- cool air flows up through the card cage, and

- warm air is deflected to the sides of the rack. Mounting the power supplies above the card cages has the following advantages: - it allows cool air to be drawn through the card cages, and

- it produces a partial vacuum which increases the air flow through the card cages (chimney effect). If forced ventilation is needed, fan(s) can be mounted in the air intakes.

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