Validating surface evolution modeling on high temperature selective emitters : an investigation of the thermal stability of nano-scale surface structures for thermophotovoltaic systems
Name
775781009-MIT.pdf
Description
Full printable version
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4.53 MB
Format
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9d53d1be1e42ea7eef99f70367d5968d
Author(s)
Kim, Sun K., S.B. Massachusetts Institute of Technology
Advisor(s)
Sang-Gook Kim.
Alternative Title
Investigation of the thermal stability of nano-scale surface structures for thermophotovoltaic systems
Date Issued
2011
Publisher
Massachusetts Institute of Technology
Abstract
As the world's traditional energy sources come under scrutiny due to dwindling supply and negative environmental impact, a global effort is being made into alternative energy systems. One such system involves the use of thermophotovoltaics (TPV), which convert thermal energy to electricity. Nano-patterned features can im prove electromagnetic emission from the TPV emitter, increasing system efficiency. These features, however, degrade at high temperatures over tine. One of the main contributors to surface evolution is surface diffusion. This investigation tested surface diffusion based simulation modeling, comparing computational results with experimental findings for high temperature annealed silicon, a cost effective material for testing instead of tungsten. Although the simulation model fits within 25% of the post-annealed curvature caused by surface diffusion, discrepancies in the simulation's time scale need to be addressed in future models for accurate time dependent modeling.
Description
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, June 2011.
"June 2011." Cataloged from PDF version of thesis.
Includes bibliographical references (p. 51-52).
Subjects
Mechanical Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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