Regenerators for Liquid Hydrogen Cryocoolers

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$599,946.00
Award Year:
2010
Program:
SBIR
Phase:
Phase II
Contract:
NNX10CB11C
Award Id:
90756
Agency Tracking Number:
084711
Solicitation Year:
n/a
Solicitation Topic Code:
X7
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:
James Maddocks
Principal Investigator
(608) 265-4246
jmaddocks@atlasscintific.com
Business Contact:
Ali Kashani
Business Official
(408) 408-0906
akashani@atlasscientific.com
Research Institute:
n/a
Abstract
Future NASA exloration, planetary and astrophysics 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 80 K, higher than that of commonly used materials. Further, we will develop novel low-temperature regenerator matrix configurations that will address both the aspect of high-efficiency and regenerator durability. Both the void fracton and the ratio of surface area to solid fracton of the regenerator matrix will be varied to achieve high efficiency.

* information listed above is at the time of submission.

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