INVERSE DESIGN OF A SELECTIVE METAMATERIAL EMITTER FOR SOLAR THERMOPHOTOVOLTAIC APPLICATIONS
9th International Symposium on Advances in Computational Heat Transfer, CHT 2024, İstanbul, Türkiye, 26 - 30 Mayıs 2024, cilt.2024, ss.203-208, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Cilt numarası: 2024
- Basıldığı Şehir: İstanbul
- Basıldığı Ülke: Türkiye
- Sayfa Sayıları: ss.203-208
- Orta Doğu Teknik Üniversitesi Adresli: Hayır
Özet
This study presents the inverse design of an optimized thermophotovoltaic emitter. First, the ideal spectral emittance for the emitter surface is identified through a parametric analysis that maximizes the conversion efficiency of the thermophotovoltaic system subject to a defined power output constraint. A relatively low emitter temperature of 1100 K is considered with an indium arsenide photovoltaic cell. Then, a 1-D metamaterial, consisting of tin doped indium oxide and hafnium oxide films, is designed to approach the identified ideal spectral behavior by minimizing the difference between the resulting conversion efficiencies of the designed emitter and the ideal emitter. A global search algorithm is coupled with an indigenous fluctuational electrodynamics solver for directly predicting spectral emittance. Results emphasize the potential of metamaterials consisting of highly doped semiconductor as a replacement of metals in performing high spectral selectivity. This study especially paves the way for highly efficient, low temperature thermophotovoltaics applications.