High temperature solar thermoelectric generator – Indoor characterization method and modeling

This paper presents an experimental study of a STEG (solar thermoelectric generator) working at high concentration ratio (>100) and high temperature (≥450 °C). An indoor characterization set-up based on Si80Ge20 thermoelectric material coupled with a selective absorber and a solar concentrating simulator was developed. The goal was to validate a physical model allowing to predict performances of such thermoelectric material for much higher temperatures. Predictive efficiencies were thus extrapolated for a working temperature beyond 800 °C. The critical issue deals with the best system dimensioning taking into account the concentrator size, and the efficiency versus the TEG (thermoelectric generator) size.

[1]  J. M. Martínez-Duart,et al.  Analytical model for solar PV and CSP electricity costs: Present LCOE values and their future evolution , 2013 .

[2]  Hongwei Sun,et al.  Electricity Generation From a Compound Parabolic Concentrator Coupled to a Thermoelectric Module , 2010 .

[3]  Evelyn N. Wang,et al.  Modeling and Optimization of Hybrid Solar Thermoelectric Systems with Thermosyphons , 2011 .

[4]  Gang Chen,et al.  High-performance flat-panel solar thermoelectric generators with high thermal concentration. , 2011, Nature materials.

[5]  G. Bernard-Granger,et al.  Influence of in situ formed MoSi2 inclusions on the thermoelectrical properties of an N-type silicon–germanium alloy , 2014 .

[6]  Gang Chen,et al.  Theoretical efficiency of solar thermoelectric energy generators , 2011 .

[7]  Joshua M. Pearce,et al.  A Review of Solar Photovoltaic Levelized Cost of Electricity , 2011 .

[8]  Rajeev J. Ram,et al.  Solar Thermoelectric Generator for Micropower Applications , 2009, Journal of Electronic Materials.

[9]  Kenneth McEnaney,et al.  Modeling of concentrating solar thermoelectric generators , 2011 .

[10]  W. Nishikawa,et al.  Key Advantages of Concentrating Photovoltaics (CPV) for Lowering Levelized Cost of Electricity (LCOE) , 2008 .

[11]  H. Barshilia,et al.  Review of physical vapor deposited (PVD) spectrally selective coatings for mid- and high-temperature solar thermal applications , 2012 .

[12]  Matteo Chiesa,et al.  Modeling and optimization of solar thermoelectric generators for terrestrial applications , 2012 .