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Title: Tandem Filter Development for Thermophotovoltaic Energy Conversion from January 2003 to February 2006

Abstract

The intent of this report is to summarize the tandem filter development for spectral control of thermophotovoltaic energy conversion from January 2003 to the termination of the program in February 2006 and to closeout tandem filter development in order to capture the knowledge gained from the development effort. Over the last three years, the goals of the tandem filter development have been the following: (1) Study the limits of the design of the interference optical coatings component of a tandem filter in order to develop higher performance designs; (2) Enhance the fabrication process of the optical interference coatings to increase the fidelity with the intended design and allow more complex, higher performing designs; (3) Support TPV module testing by providing tandem filters and assembly assistance; (4) Identify and develop materials for optical interference coatings that are stable at higher temperatures than current materials; and (5) Improve the understanding of the directional and spectral reflectance and transmittance characterization of the completed tandem filters to insure the veracity of the characterization data and to provide useful feedback to the tandem filter development process. This development effort has been a collaboration between KAPL and its contracted development partner, Rugate Technologies Inc.

Authors:
Publication Date:
Research Org.:
Knolls Atomic Power Laboratory (KAPL), Niskayuna, NY
Sponsoring Org.:
USDOE
OSTI Identifier:
903185
Report Number(s):
LM-07K001b
TRN: US200720%%200
DOE Contract Number:
DE-AC12-00SN39357
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; COATINGS; DESIGN; ENERGY CONVERSION; FABRICATION; FEEDBACK; PERFORMANCE; SPECTRAL REFLECTANCE; TESTING

Citation Formats

Fourspring PM. Tandem Filter Development for Thermophotovoltaic Energy Conversion from January 2003 to February 2006. United States: N. p., 2007. Web. doi:10.2172/903185.
Fourspring PM. Tandem Filter Development for Thermophotovoltaic Energy Conversion from January 2003 to February 2006. United States. doi:10.2172/903185.
Fourspring PM. Mon . "Tandem Filter Development for Thermophotovoltaic Energy Conversion from January 2003 to February 2006". United States. doi:10.2172/903185. https://www.osti.gov/servlets/purl/903185.
@article{osti_903185,
title = {Tandem Filter Development for Thermophotovoltaic Energy Conversion from January 2003 to February 2006},
author = {Fourspring PM},
abstractNote = {The intent of this report is to summarize the tandem filter development for spectral control of thermophotovoltaic energy conversion from January 2003 to the termination of the program in February 2006 and to closeout tandem filter development in order to capture the knowledge gained from the development effort. Over the last three years, the goals of the tandem filter development have been the following: (1) Study the limits of the design of the interference optical coatings component of a tandem filter in order to develop higher performance designs; (2) Enhance the fabrication process of the optical interference coatings to increase the fidelity with the intended design and allow more complex, higher performing designs; (3) Support TPV module testing by providing tandem filters and assembly assistance; (4) Identify and develop materials for optical interference coatings that are stable at higher temperatures than current materials; and (5) Improve the understanding of the directional and spectral reflectance and transmittance characterization of the completed tandem filters to insure the veracity of the characterization data and to provide useful feedback to the tandem filter development process. This development effort has been a collaboration between KAPL and its contracted development partner, Rugate Technologies Inc.},
doi = {10.2172/903185},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Mar 19 00:00:00 EDT 2007},
month = {Mon Mar 19 00:00:00 EDT 2007}
}

Technical Report:

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  • Highlights of the technical discussions presented at the workshop and the site visits are included in this report. The intent of the Workshop was to review the progress of the program during the past year; to encourage US specialists to discuss with their Indian counterparts the direction and future of the program; to assess the status of the individual projects through site visits to the facilities and address any concerns or anticipated problems in meeting the objectives of each of the collaborative projects; and to provide a forum for technical exchange between US and Indian industry to understand the needmore » for and availability of technology, products and services in the US and India in specific areas of interest in coal and biomass conversion. There are six projects which have been selected for collaboration in coal conversion and three in biomass conversion. The six coal projects are: evaluation of freeboard performance in a fluidized-bed combustor; AFBC boiler scaleup; hot gas cleanup; cold gas cleanup; rheology; stability, and combustion of coal/water mixtures; and coal beneficiation. The 3 major biomass projects are: development of a village-level gasifier (5 HP) for irrigation pumps based on charred agricultural residue; utilization of producer gas in small (3 to 5 HP) utility engines; and development and field implementation of small wood-based gasifier engine systems (5 to 30 HP).« less
  • A filter system to transmit short wavelength radiation and reflect long wavelength radiation for a thermophotovoltaic energy conversion cell comprises an optically transparent substrate segregation layer with at least one coherent wavelength in optical thickness; a dielectric interference filter deposited on one side of the substrate segregation layer, the interference filter being disposed toward the source of radiation, the interference filter including a plurality of alternating layers of high and low optical index materials adapted to change from transmitting to reflecting at a nominal wavelength {lambda}{sub IF} approximately equal to the bandgap wavelength {lambda}{sub g} of the thermophotovoltaic cell, themore » interference filter being adapted to transmit incident radiation from about 0.5{lambda}{sub IF} to {lambda}{sub IF} and reflect from {lambda}{sub IF} to about 2{lambda}{sub IF}; and a high mobility plasma filter deposited on the opposite side of the substrate segregation layer, the plasma filter being adapted to start to become reflecting at a wavelength of about 1.5{lambda}{sub IF}. 10 figs.« less
  • A filter system to transmit short wavelength radiation and reflect long wavelength radiation for a thermophotovoltaic energy conversion cell comprises an optically transparent substrate segregation layer with at least one coherent wavelength in optical thickness; a dielectric interference filter deposited on one side of the substrate segregation layer, the interference filter being disposed toward the source of radiation, the interference filter including a plurality of alternating layers of high and low optical index materials adapted to change from transmitting to reflecting at a nominal wavelength {lambda}{sub IF} approximately equal to the bandgap wavelength {lambda}{sub g} of the thermophotovoltaic cell, themore » interference filter being adapted to transmit incident radiation from about 0.5{lambda}{sub IF} to {lambda}{sub IF} and reflect from {lambda}{sub IF} to about 2{lambda}{sub IF}; and a high mobility plasma filter deposited on the opposite side of the substrate segregation layer, the plasma filter being adapted to start to become reflecting at a wavelength of about 1.5{lambda}{sub IF}.« less
  • A filter system to transmit short wavelength radiation and reflect long wavelength radiation for a thermophotovoltaic energy conversion cell comprises an optically transparent substrate segregation layer with at least one coherent wavelength in optical thickness; a dielectric interference filter deposited on one side of the substrate segregation layer, the interference filter being disposed toward the source of radiation, the interference filter including a plurality of alternating layers of high and low optical index materials adapted to change from transmitting to reflecting at a nominal wavelength .lambda..sub.IF approximately equal to the bandgap wavelength .lambda..sub.g of the thermophotovoltaic cell, the interference filtermore » being adapted to transmit incident radiation from about 0.5.lambda..sub.IF to .lambda..sub.IF and reflect from .lambda..sub.IF to about 2.lambda..sub.IF ; and a high mobility plasma filter deposited on the opposite side of the substrate segregation layer, the plasma filter being adapted to start to become reflecting at a wavelength of about 1.5.lambda..sub.IF.« less