Non-imaging optics in a thermophotovoltaic generator

Document identifier: oai:dalea.du.se:1127
Keyword: Solenergi, TPV, Optik
Publication year: 2002
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.

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
    metadata: 
        mods: 
            @attributes: 
                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