A Multi-Stage Hybrid 10 Kelvin Cooler

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: F29601-02-C-0154
Agency Tracking Number: 021NM-1662
Amount: $99,373.00
Phase: Phase I
Program: SBIR
Awards Year: 2002
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
1367 Camino Robles Way, San Jose, CA, 95120
DUNS: 938515913
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Ali Kashani
 Program Director
 (408) 507-0906
Business Contact
 Ali Kashani
Title: Program Director
Phone: (408) 507-0906
Email: atlassci@wwc.com
Research Institution
"We propose to develop a multi-stage hybrid cooler capable of providing 1 W of cooling at 10 K. To achieve the most efficient and reliable hybrid cooler possible, we propose to combine a multi-stage, linear-drive pulse tube with a low-temperaturereverse-Brayton stage. In this way we will take advantage of the strengths of each system, while minimizing their respective weaknesses. The system avoids the inherent losses associated with a regenerator at low temperature, as well as, the inefficienciesassociated with the Joule-Thompson process, by incorporating a novel turbo-expander in the low temperature reverse-Brayton stage. The use of a low-vibration, linear, compressor for the pulse-tube stage provides a large pressure ratio allowing the size andexpense of the recuperative heat exchanger to be minimized. These features result in a low-mass reverse-Brayton stage that can be fabricated reliably, at a reasonable cost, without sacrificing performance. The proposed hybrid cryocooler will achieveunprecedented efficiency below 10 K without resorting to high-unit-cost technologies such as super-critical shafts or extremely precise bearing clearances. The system will exhibit the high reliability and low vibration associated with pulse-tube andturbomachine-based reverse-Brayton systems. The result is a cryocooler that is ideally suited to cooling space-borne loads at or below 10 K. The proposed cooler can be employed in a wide variety of commer

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

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