Heat transfer device in a rotating structure

• US 7,896,611 B2
• Filed: 01/03/2007
• Issued: 03/01/2011
• Est. Priority Date: 01/03/2007
• Status: Active Grant

• Current Assignee: Globalfoundries US Incorporated (GlobalFoundries, Inc.)
• Original Assignee: International Business Machines Corporation
• Inventors: Khanna, Vijayeshwar D., Sri-Jayantha, Sri M., McVicker, Gerard
• Primary Examiner(s): WIEHE, NATHANIEL EDWARD
• Application Number:
  US11/649,041
• Publication Number:
  US 20080159853A1
• Time in Patent Office: 1,518 Days
• Field of Search: 415/177, 415/178, 415/179, 415/199.2, 415/208.3, 361/695, 361/697, 257/721, 257/722, 174/16.1, 174/16.3, 165/80.3, 165/185
• US Class Current: 415/177
• CPC Class Codes: F04D 25/04 the pump being fluid-driven pumps driven by exhaust gases F02B37/00, F02B39/00; turbochargers F02C6/12
• CPC Class Codes: F04D 29/582 specially adapted for elastic fluid pumps
• CPC Class Codes: H01L 2224/0401 Bonding areas specifically adapted for bump connectors, e.g. under bump metallisation [UBM]
• CPC Class Codes: H01L 2224/16 of an individual bump connector
• CPC Class Codes: H01L 2224/73253 Bump and layer connectors
• CPC Class Codes: H01L 23/467 by flowing gases, e.g. air H01L23/473 takes precedence
• CPC Class Codes: H01L 2924/00011 Not relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/15311 being a ball array, e.g. BGA
• CPC Class Codes: H01L 2924/16152 Cap comprising a cavity for hosting the device, e.g. U-shaped cap
• CPC Class Codes: Y10T 29/49236 Fluid pump or compressor making

Abstract

A cooling system includes a moving rotor system which in turn includes: a disk on which a plurality of heat conducting structures are distributed, the heat conducting structures having a cross section optimized for maximum surface area to footprint area; the heat conducting structures having a shape to optimize the heat transfer coefficient between the structures moving through the ambient fluid; and a mechanism for generating a mass fluid flow over the conducting structures so that the heat conducting structures are persistently cooled.

Claims

1. A cooling system comprising:

a moving rotor system comprising;

a disk comprising;

a blade assembly comprising rotating blades for dissipating heat, said rotating blades moving through ambient fluid; and

a plurality of heat conducting structures distributed in a circular pattern around the disk, the heat conducting structures having a high aspect ratio that maximizes a surface area to footprint area;

wherein the heat conducting structures comprise arc-shaped thin-fins with a rectangular cross-section; and

wherein the rotating blades generate a mass fluid flow of the ambient fluid over the heat conducting structures so that the heat conducting structures are persistently cooled.

2. The cooling system of claim 1 wherein the rotating blades are arranged in a spiral pattern.

3. The cooling system of claim 1 further comprising a baffle to reduce a swirl component of the fluid.

4. A cooling system comprising:

a mechanism to direct mass fluid flow radially outward, thereby reducing a swirl component of ambient fluid; and

a moving rotor system comprising;

a disk comprising;

a plurality of heat conducting structures distributed in a circular pattern around the disk, the heat conducting structures having a high aspect ratio that maximizes a surface area to footprint area;

a blade assembly comprising a first set of rotating blades moving through the ambient fluid;

wherein the heat conducting structures comprise arc-shaped thin-fins with a rectangular cross-section; and

wherein the first set of rotating blades are disposed along an inner edge of the circular pattern and generate a mass fluid flow of the ambient fluid over the heat conducting structures so that the heat conducting structures are persistently cooled.

5. The cooling system of claim 4 where the mechanism to direct the mass fluid flow has multiple radial instantiations.

6. The cooling system of claim 5 where each radial instantiation is a comb-like structure which enhances heat dissipation by stripping the fluid boundary layer as each fin moves through.

7. The cooling system of claim 4 where the mechanism to direct the mass fluid flow radially out of the system, thereby reducing the swirl component of fluid, comprises a set of baffles.