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Induced Flow in 3D Package

IP.com Disclosure Number: IPCOM000090967D
Original Publication Date: 1969-Sep-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Gupta, OR: AUTHOR

Abstract

Electronic package 10, to be cooled, is immersed in tank 12 containing cooling fluid 14. Package 10 is placed within tank 12 such that a distinct column A is maintained at the side of such tank as well as a distinct channel at height H above the bottom of tank 12. As the heat flux is generated at immersed package 10, natural convection is developed in between cards 16 carrying the heat generating components within columns B. As the heat flux increases, fluid 14 in columns B rises. At a certain temperature, nucleate boiling bubbles form and rise to the top of columns B where the vapor from them escapes and is condensed at the heat exchanger 20 at the top of tank 12. The return flow is through column A and along the bottom of tank 12 to the various columns.

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Induced Flow in 3D Package

Electronic package 10, to be cooled, is immersed in tank 12 containing cooling fluid 14. Package 10 is placed within tank 12 such that a distinct column A is maintained at the side of such tank as well as a distinct channel at height H above the bottom of tank 12. As the heat flux is generated at immersed package 10, natural convection is developed in between cards 16 carrying the heat generating components within columns B. As the heat flux increases, fluid 14 in columns B rises. At a certain temperature, nucleate boiling bubbles form and rise to the top of columns B where the vapor from them escapes and is condensed at the heat exchanger 20 at the top of tank 12. The return flow is through column A and along the bottom of tank 12 to the various columns. This nucleate boiling within the columns sets up a circulation pumping action. The condensate drips onto collector 22 which is grooved and tilted to allow the condensate to travel to column A. Where it is added to fluid 14 in tank 12 and thus does not interfere with the upflow in columns B between cards 16. Collector 22 contains a number of perforations 24 so that the vapor can pass through them to the condenser. If an elongated tank is used, the flow can be arranged outwardly from the middle to either side and, likewise, the condensate collector can be tilted from the middle towards the sides of the tank. Thus, the induced flow is down columns A at both sides of the tank and up column...