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Browse Prior Art Database

Common Condenser, Multi-bellows Heat Pipe

IP.com Disclosure Number: IPCOM000107625D
Original Publication Date: 1992-Mar-01
Included in the Prior Art Database: 2005-Mar-22
Document File: 2 page(s) / 73K

Publishing Venue

IBM

Related People

Pavelka, JB: AUTHOR [+2]

Abstract

A heat pipe structure is disclosed that employs multiple evaporators connected to a common condenser section. This design allows an array of heat sources to be cooled by a single heat pipe. The evaporators are connected to the condenser by flexible metallic bellows. These bellows allow the evaporators to accommodate alignment variations in the heat sources. Since all of the evaporators are connected to a common condenser, only one unit needs to be charged and sealed. In addition, the vapor pressure in each evaporator is equalized, resulting in a uniform temperature between heat sources. (Image Omitted)

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Common Condenser, Multi-bellows Heat Pipe

       A heat pipe structure is disclosed that employs multiple
evaporators connected to a common condenser section.  This design
allows an array of heat sources to be cooled by a single heat pipe.
The evaporators are connected to the condenser by flexible metallic
bellows.  These bellows allow the evaporators to accommodate
alignment variations in the heat sources.  Since all of the
evaporators are connected to a common condenser, only one unit needs
to be charged and sealed.  In addition, the vapor pressure in each
evaporator is equalized, resulting in a uniform temperature between
heat sources.

                            (Image Omitted)

      Operation of this design is the same as a regular heat pipe.
An evaporator section is attached to each of the bellows.  When the
evaporator is heated, the working fluid in the wick is converted to
vapor.  This vapor travels out of the bellows and into the condenser
section.  Here, the vapor condenses back to liquid and released its
latent heat. The heat is removed from the unit through an external
liquid or air-cooled heat sink.  The condensate is wicked back to the
evaporator, through the screen mesh wick, to start the cycle over.

      Because the working fluid evaporates and condenses at the same
temperature, there is virtually no temperature drop across the heat
pipe.  This provides a low thermal resistance path from the heat
source to...