Shockwave Fabrication of High Performance Thermoelectrics

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNX09CF76P
Agency Tracking Number: 080035
Amount: $100,000.00
Phase: Phase I
Program: STTR
Awards Year: 2009
Solitcitation Year: 2008
Solitcitation Topic Code: T8.01
Solitcitation Number: N/A
Small Business Information
TXL Group, Inc.
2000 Wyoming Ave., El Paso, TX, 79903-3501
Duns: 799041889
Hubzone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 David Nemir
 Principal Investigator
 (915) 533-7800
Business Contact
 David Nemir
Title: Business Official
Phone: (915) 533-7800
Research Institution
 University of Texas at El Paso
 Not Available
 500 W. University Avenue
El Paso, TX, 79968
 (915) 747-5680
 Domestic nonprofit research organization
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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