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Memorias de investigación
Artículos en revistas:
Thermal shields for heat loss reduction in Siemens-type CVD reactors
Año:2016
Áreas de investigación
  • Células solares
Datos
Descripción
The use of thermal shields to reduce radiation heat loss in Siemens-type CVD reactors is analyzed, both theoretically and experimentally. The potential savings from the use of the thermal shields is first explored using a radiation heat model that takes emissivity variations with wavelength into account, which is important for materials that do not behave as gray bodies. The theoretical calculations confirm that materials with lower surface emissivity lead to higher radiation savings. Assuming that radiation heat loss is responsible for around 50% of the total power consumption, a reduction of 32.9% and 15.5% is obtained if thermal shields with constant emissivities of 0.3 and 0.7 are considered, respectively. Experiments considering different thermal shields are conducted in a laboratory CVD reactor, confirming that the real materials do not behave as gray bodies, and proving that significant energy savings in the polysilicon deposition process are obtained. Using silicon as a thermal shield leads to energy savings of between 26.5?28.5%. For wavelength-dependent emissivities, the model shows that there are significant differences in radiation heat loss, of around 25%, when compared to that of constant emissivity. The results of the model highlight the importance of having reliable data on the emissivities within the relevant range of wavelengths, and at deposition temperatures, which remains a pending issue.
Internacional
Si
JCR del ISI
Si
Título de la revista
Ecs Journal of Solid State Science And Technology
ISSN
2162-8769
Factor de impacto JCR
0,917
Información de impacto
Volumen
5
DOI
10.1149/2.0171603jss
Número de revista
3
Desde la página
1
Hasta la página
7
Mes
SIN MES
Ranking
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Alba Ramos Cabal
  • Autor: Javier Valdehita Torija (UPM)
  • Autor: Juan Carlos Zamorano Saavedra (UPM)
  • Autor: Carlos del Cañizo Nadal (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Silicio y Nuevos Conceptos para Células Solares
  • Centro o Instituto I+D+i: Instituto de Energía Solar
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