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
 atlassci@wwc.com
Business Contact
 Ali Kashani
Title: Program Director
Phone: (408) 507-0906
Email: atlassci@wwc.com
Research Institution
N/A
Abstract
"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. *

Agency Micro-sites

SBA logo
Department of Agriculture logo
Department of Commerce logo
Department of Defense logo
Department of Education logo
Department of Energy logo
Department of Health and Human Services logo
Department of Homeland Security logo
Department of Transportation logo
Environmental Protection Agency logo
National Aeronautics and Space Administration logo
National Science Foundation logo
US Flag An Official Website of the United States Government