LIQUID FILM EVAPORATION COOLED MIRROR

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: N/A
Agency Tracking Number: 15717
Amount: $500,000.00
Phase: Phase II
Program: SBIR
Awards Year: 1992
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Thermacore Inc.
780 Eden Road, Lancaster, PA, 17601
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 John H Rosenfeld
 Principal Investigator
 (717) 569-6551
Business Contact
Phone: () -
Research Institution
N/A
Abstract
EVAPORATING A COOLANT FROM THE SURFACES OF A FINE POROUS WICK CAN DO SOMETHING NO OTHER KNOWN COOLING SCHEME CAN DO: MAINTAIN A NEARLY CONSTANT SURFACE TEMPERATURE WHILE THE HEAT FLUX IS VARIED BY TEN TIMES OR MORE. THE PROGRAM GOAL IS TO COOL HIGH-POWERED LASER MIRRORS, AND OTHER TOUGH COOLING PROBLEMS. THE UNIQUE HEAT EXCHANGER DESIGN IS AN ADVANCED COUSIN OF THE HEAT PIPE AND OF PUMPED TWO-PHASE (BOILING) COOLING DESIGNS DEVELOPED BY THERMACORE. LIQUID FILM EVAPORATION (LFE) COOLING WORKS BY MAINTAINING A STABLE EVAPORATING LIQUID FILM LAYER OVER THE WICK SURFACES. AS THE HEAT FLUX GOES UP, THE FILM THICKNESS GOES DOWN, SO THE SURFACE TEMPERATURE CHANGES ARE MINIMIZED. ABSORBED HEAT FLUXES UP TO 500 W/CM2 CAN BE REMOVED BY LFE. FUNDAMENTALS ARE BEING STUDIED IN PHASE I; PHASE II WILL REDUCE THE APPROACH TO PRACTICE WITH ACTUAL LFE COOLED MIRRORS.

* information listed above is at the time of submission.

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