Shockwave Fabrication of High Performance Thermoelectrics

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$100,000.00
Award Year:
2009
Program:
STTR
Phase:
Phase I
Contract:
NNX09CF76P
Award Id:
90873
Agency Tracking Number:
080035
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
2000 Wyoming Avenue, El Paso, TX, 79903
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
799041889
Principal Investigator:
David Nemir
Principal Investigator
(915) 533-7800
david.nemir@gmail.com
Business Contact:
David Nemir
Business Official
(915) 533-7800
Research Institute:
University of Texas at El Paso

500 W. University Avenue
El Paso, TX, 79968
(915) 747-5680
Nonprofit college or university
Abstract
Thermoelectric (TE) generators/refrigerators have the advantages of lack of moving parts, quiet operation, and flexibility in deployment, but their use has been limited because of their relatively low conversion efficiency. Two major loss components are conductive (phonon) heat transfer through the TE lattice and parasitic losses at fabrication interfaces. Shock wave consolidation of thermoelectric nanopowders to produce TE devices will reduce both loss sources, leading to enhanced efficiency devices. The conversion efficiency of a TE device will always be thermodynamically limited by the Carnot ratio of (Th-Tc)/Th, where Th and Tc are the temperatures of the hot and cold junctions. Present technology thermoelectric devices can provide conversion efficiencies up to a third of the Carnot limit. With the restrictions on phonon transport acruing from nanopowder consolidation, conversion efficiencies of over 50% of the Carnot limit should be possible.

* information listed above is at the time of submission.

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