Non-imaging optics in a thermophotovoltaic generator
Document identifier: oai:dalea.du.se:1127
Keyword: Solenergi,
TPV,
OptikPublication year: 2002Abstract: In order to achieve high efficiency in a TPV Generator, it is important that a high fraction of emitted photons with energies below the TPV cell bandgap are reflected back to the emitter. this can be accomplished in several ways. We present the idea of an internally reflecting egg-shaped double cone with the emitter at one end, an edge filter at the wide center, and the TPV array at the other end. So far, we have studied this geometry by means of both ray tracing analysis in a computer program and by means of measurements with an emulated emitter. A sharp switchover from transmission to reflection in a multiple layer edge filter can ba achieved only if the angles of incident rays are confined to a fairly narrow angular interval. The two used methods both show that the studied optics can lower the angular spread of rays incident to the filter and that some 96% of the emitted rays (in the ideal case) reach their goal without passing the filter or being reflected by the filter more than once. A suggestion of a whole wood powder fuelled TPV system with this egg-shaped double cone and edge filter implemented is also given, as well as an animation tool for modelling the optical part of the system.
Authors
Eva Lindberg
Högskolan Dalarna; Miljöteknik
Other publications
>>
Lars Broman
Högskolan Dalarna; Miljöteknik
Other publications
>>
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header:
identifier: oai:dalea.du.se:1127
datestamp: 2021-04-15T12:16:02Z
setSpec: SwePub-du
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version: 3.7
recordInfo:
recordContentSource: du
recordCreationDate: 2005-05-19
identifier: http://urn.kb.se/resolve?urn=urn:nbn:se:du-1127
titleInfo:
@attributes:
lang: eng
title: Non-imaging optics in a thermophotovoltaic generator
abstract: In order to achieve high efficiency in a TPV Generator it is important that a high fraction of emitted photons with energies below the TPV cell bandgap are reflected back to the emitter. this can be accomplished in several ways. We present the idea of an internally reflecting egg-shaped double cone with the emitter at one end an edge filter at the wide center and the TPV array at the other end. So far we have studied this geometry by means of both ray tracing analysis in a computer program and by means of measurements with an emulated emitter. A sharp switchover from transmission to reflection in a multiple layer edge filter can ba achieved only if the angles of incident rays are confined to a fairly narrow angular interval. The two used methods both show that the studied optics can lower the angular spread of rays incident to the filter and that some 96% of the emitted rays (in the ideal case) reach their goal without passing the filter or being reflected by the filter more than once. A suggestion of a whole wood powder fuelled TPV system with this egg-shaped double cone and edge filter implemented is also given as well as an animation tool for modelling the optical part of the system.
subject:
@attributes:
lang: eng
topic: solenergi
@attributes:
lang: eng
topic: TPV
@attributes:
lang: eng
topic: optik
language:
languageTerm: eng
genre:
conference/other
vet
note:
Published
2
name:
@attributes:
type: personal
authority: du
namePart:
Lindberg
Eva
role:
roleTerm: aut
affiliation:
Högskolan Dalarna
Miljöteknik
nameIdentifier: eli
@attributes:
type: personal
authority: du
namePart:
Broman
Lars
role:
roleTerm: aut
affiliation:
Högskolan Dalarna
Miljöteknik
nameIdentifier: lbr
originInfo:
dateIssued: 2002
place:
placeTerm: Rome Italy
relatedItem:
@attributes:
type: host
titleInfo:
title: Fifth Conference on Thermophotovoltaic Generation of Electricity
@attributes:
type: series
titleInfo:
title: AIP Conference Proceedings
partNumber: 653
physicalDescription:
form: print
typeOfResource: text