Advanced Condensers Utilizing Microchannel Evaporator Networks (ACUMEN)

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N00014-08-M-0096
Agency Tracking Number: O081-EP7-4093
Amount: $99,923.00
Phase: Phase I
Program: SBIR
Awards Year: 2008
Solicitation Year: 2008
Solicitation Topic Code: OSD08-EP7
Solicitation Number: 2008.1
Small Business Information
133 Defense Highway, Suite 212, Annapolis, MD, 21401
DUNS: 153908801
HUBZone Owned: N
Woman Owned: Y
Socially and Economically Disadvantaged: N
Principal Investigator
 Steven Seghi
 Senior Scientist
 (410) 987-3435
Business Contact
 Sharon Fehrenbacher
Title: CEO
Phone: (410) 224-3710
Research Institution
Described is a highly compact two-phase microchannel condenser concept based on a two-phase loop evaporator design developed for cooling high performance servers in racks on Navy ships/submarines, a novel design that has demonstrated open-air evaporative heat transfer coefficients with water of 250,000 W/m2 K. The idea is to utilize the existing microchannel evaporator design approach -- which combines 20 micron width copper microchannels with a larger pore size low thermal conductivity "supply wick" in a flat form factor -- and apply that same design approach to a microchannel condenser. Based on axially-grooved heat pipe condenser heat transfer coefficients that are about twice those in the evaporator, and cylindrical two-phase loop evaporators that function very effectively as condensers when heat load sharing, proposed microchannel condenser is expected to achieve heat transfer coefficients equal to or greater than the previously mentioned water value. The technology should be highly effective with typical two-phase working fluids, and it can be integrated into a variety of two-phase heat transport systems, including ones that are capillary pumped, liquid mechanically pumped, or vapor compression pumped. The team that successfully carried out the previous SBIR program for the Navy is maintained: TA&T, ATK, B&K Engineering, and Aavid Thermalloy.

* Information listed above is at the time of submission. *

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