Browse Prior Art Database

Multi-Stage Cascade Suction Flow Air Moving System

IP.com Disclosure Number: IPCOM000116603D
Original Publication Date: 1995-Oct-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Anderson, TM: AUTHOR [+3]

Abstract

A method for providing air flow to a variety of pressure drops with a minimal number of unique Air Moving Devices (AMDs) is disclosed. The concept exploits a cascade arrangement of AMDs in a serial or serial-parallel manner to accommodate the differing flow resistance characteristics of a combination of coolable devices.

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Multi-Stage Cascade Suction Flow Air Moving System

      A method for providing air flow to a variety of pressure drops
with a minimal number of unique Air Moving Devices (AMDs) is
disclosed.  The concept exploits a cascade arrangement of AMDs in a
serial or serial-parallel manner to accommodate the differing flow
resistance characteristics of a combination of coolable devices.

      The concept will be described by an example of cooling several
differing card cages within an electronic cabinet using several
instances of a single AMD.  As shown in Fig. 1, three card cages
(101, 102, 103) having different pressure drop requirements are
housed within a cabinet (104) and fed from the ambient (105).  For
this example, the pressure drop requirement of card cage (101) is
greater than that of (102) which is likewise greater than that of
(103).  Rather than have each card cage matched up to an individual
and unique AMD in a set of three independent flow paths, a single AMD
part (106) could be employed multiple times to provide the needed
customized flow characteristics.  This would be accomplished by
placing the AMDs in serial and tapping (107) the intra-AMD duct work
(108).  The exhaust of the last AMD in the series would exhaust spent
coolant to the exterior of the cabinet (109).

      The non-linear relationship between flow rate and pressure drop
would dictate careful selection of the AMD performance
characteristics to best balance the cooling flows.  A sec...