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Method for a liquid-vapor phase change heat-transfer device with a flexible adiabatic region

IP.com Disclosure Number: IPCOM000007732D
Publication Date: 2002-Apr-17
Document File: 6 page(s) / 141K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for a liquid-vapor phase change heat-transfer device with a flexible adiabatic region. Benefits include improved thermal performance.

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Method for a liquid-vapor phase change heat-transfer device with a flexible adiabatic region

Disclosed is a method for a liquid-vapor phase change heat-transfer device with a flexible adiabatic region. Benefits include improved thermal performance.

Background

              As electronic components provide increased speed and performance, the amount of heat they generate increases. Cooling is required for continued operation. Conventional electronic, including integrated circuit (IC), cooling consists of active and passive heatsinks with bases and fin assemblies (see Figure 1).

              A conventional heat pipe requires a wick structure, making a fiber wire bundle very well suited for use with plastic tubes.

General description

              The disclosed method includes the use of flexible tubing to connect the heated section of a phase change system to a remotely cooled section. The key elements include: 

§         Flexible (such as plastic) connections between heated and cooled sections of the phase change system, enabling a diversity of volume constraints/placement options and possible weight reduction

§         Two options for the shape of the phase change heat transfer device:
              -             Straight arrangement, like a conventional heat pipe, except the wick structure consists of thin, flexible wires for flexibility in the adiabatic region
              -             Loop arrangement, like an oscillating heat pipe, which would not need a wick

§         Flexible tubes in the adiabatic section, allowing for layout design flexibility

§         Conventional heatsink with an oscillating heat pipe

§         Heatsink base with multiple internal channels connected externally with flexible piping/ducting (such as straight, in series, parallel, or some derivative arrangement), providing a volume for the oscillatory phase change of a working fluid

Advantages

              The disclosed method provides several advantages, including:

§         Reduced heatsink thermal resistance (qsa) for both laptops and desktop/servers
Easily installed flexible piping that is adaptable to various cases with different volume constraints

§         Support for the implementation of remote cooling

§         Support for the use of the screen region for heat dissipation in laptop computers

§         Support for the installation of a remote heat exchanger in addition to the conventional heatsink for desktops and servers

Detailed description

              The disclosed method includes the use of flexible tubing. For example, the flexible tubing connecting the evaporator and condenser regions (see Figure 2) result in more design options in fitting the sys...