This work has investigated and developed critical LAST (Lead Antimony Silver Telluride) / LASTT (Lead Antimony Silver Tin Telluride) materials for critical U.S. Army battlefield power generation applications. Various compositions and processing parameters have been discovered that can create tunable temperature-dependent behaviors that can be exploited in designing segmented TE modules in this application. The thermal fatigue and mechanical strength properties of these refined LAST / LASTT materials have been investigated and characterized for the first time. The Young's modulus and Poisson's ratio were used to monitor microcrack generation and growth and thereby characterize thermal fatigue damage within these materials. The elasticity/thermal fatigue testing on n-type LAST and p-type LASTT showed that the Young's modulus and Poisson's ratio were relatively insensitive to thermal fatigue cycling. New mechanical strength measurements were also obtained on these materials. This new property knowledge, along with extensive thermal, thermoelectric, and structural analysis work, has enabled and accelerated the first-ever segmented TE module designs using n-type LAST / p-type LASTT segmented with bismuth telluride components. This work has also investigated and developed new high-performance microchannel heat exchanger designs to integrate with these advanced TE module designs in an advanced thermoelectric power generation system for U.S. Army Tactical Quiet Generators. This work has investigated and quantified various TEG system options that can deliver 1.4 kW to 2.9 kW of power output at 8.2% to 8.9% conversion efficiencies in Model A 30-kW and 60-kW Tactical Quiet Generators and that could be applicable to other Army battlefield heat sources. This project represents a high-challenge, high payoff endeavor to transition LAST / LASTT materials into operating TE modules and an operating TEG system. It is the epitome of the basic theme that 'If you want something you've never had, then you must be willing to do something you've never done'.
Advanced soldier-based thermoelectric power systems using battlefield heat sources
Fortschrittliches soldatenbasierendes thermoelektrisches Stromerzeugungssystem, welches Wärmequellen des Schlachtfelds nutzt
2010
13 Seiten, 12 Bilder, 1 Tabelle, 16 Quellen
Aufsatz (Konferenz)
Englisch
Tellurid , Stromerzeugung , Temperaturabhängigkeit , thermische Ermüdung , mechanische Festigkeit , Young-Modul , Poisson-Zahl , Mikroriss , Rissbildung , Elastizität , p-Halbleiter , n-Halbleiter , Mikrokanal , Wärmetauscher , thermoelektrische Energiedirektumwandlung , Leistungsabgabe , thermoelektrisches Modul , militärische Ausrüstung , Wärmequelle
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