MEMS-Fabricated, Highly Effective, Compact Recuperative Heat Exchanger for a Miniature, Reliable Cryocooler

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: FA9453-04-M-0276
Agency Tracking Number: B041-078-1506
Amount: $98,807.00
Phase: Phase I
Program: SBIR
Awards Year: 2004
Solicitation Year: 2004
Solicitation Topic Code: MDA04-078
Solicitation Number: 2004.1
Small Business Information
3267 Progress Drive, Orlando, FL, 32826
DUNS: 608777798
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Dan Rini
 President
 (407) 384-7840
 dan@rinitech.com
Business Contact
 Dan Rini
Title: Presient
Phone: (407) 384-7840
Email: dan@rinitech.com
Research Institution
N/A
Abstract
RTI will demonstrate the MEMS technologies for a recuperative heat exchanger for a reverse turbo Brayton cycle (RTBC) cryocooler. In the phase I efforts, the heat exchanger would be designed for a 20 W (cooling load), 77K RTBC cryocooler. Selection of this relatively high-temperature cycle is for ease of testing in Phase II, which will involve fabrication of complete cryocooler, testing of the heat exchanger(s) built in Phase I as well as extending the design to lower temperatures down to 10 K. Key technical innovation is based on techniques to drastically minimize performance-degrading axial conduction, while not impeding heat exchange between the hot and cold streams. Microfabrication is a key enabler for implementation of this concept. Multiple fabrication alternatives would be considered. Based on preliminary analysis, the heat exchanger for Phase I is expected to be approximately 3x3x7.5 cm in linear dimensions, weigh about 0.085 kg, and have an effectiveness of 0.982 and a pressure drop of about 1000 Pa in each fluid for a mass flow rate of 0.00181 kg/s of Neon in each side of the heat exchanger, providing an overall COP of 0.083 for a 77 K cooler.

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

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