Novel Regenerators for Use Below 35 Kelvin

Award Information
Agency:
Department of Defense
Branch
Missile Defense Agency
Amount:
$99,739.00
Award Year:
2009
Program:
SBIR
Phase:
Phase I
Contract:
W9113M-09-C-0054
Award Id:
91515
Agency Tracking Number:
B083-010-0087
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
1367 Camino Robles Way, San Jose, CA, 95120
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
938515913
Principal Investigator:
Ali Kashani
Program Director
(408) 507-0906
akashani@atlasscientific.com
Business Contact:
Ali Kashani
Program Director
(408) 507-0906
akashani@atlasscientific.com
Research Institution:
n/a
Abstract
Future MDA missions will require various enhancements in multi-stage cryocoolers. These include increased efficiency, reduced vibration and reductions in overall system mass and power consumption. For the small coolers required, pulse tube and Stirling coolers offer the best opportunities. At present, the efficiency of these coolers is limited by the effectiveness of low-temperature-stage regenerators. Below about 60 K, two factors play key roles in reducing the effectiveness of regenerators. One is that the heat capacity of most materials falls rapidly with decreasing temperature, thereby, severely limiting the number of useful materials to a few in common use. A second factor is that these commonly used materials are only available in powder form, a form known to raise reliability issues. In this effort, we will address both factors. We will use newly developed materials with high heat capacities at temperatures below 60 K, higher than that of commonly used materials. Further, we will use a novel low-temperature regenerator matrix that will address both the aspect of high-efficiency and regenerator durability. Both the void fraction and the ratio of surface area to solid fraction of the regenerator matrix will be varied to achieve high efficiency

* information listed above is at the time of submission.

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