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  • 1.
    Bales, Chris
    et al.
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Lindberg, Eva
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Fiedler, Frank
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Rönnelid, Mats
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    European Solar Engineering School ESES: Past and Future2006Ingår i: Eurosun 2006, Glasgow, Scotland, 2006Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    The European Solar Engineering School ESES is a one-year masters program that started in 1999 at the Solar Energy Research Center SERC, Dalarna University College. It has been growing in popularity over the years, with over 20 students in the current year. Approximately half the students come from Europe, the rest coming from all over the globe. This paper described the contents and experiences from seven years of running the programme and the plans for adapting the programme to the Bologna process. The majority of the students from ESES have found work in the solar industry, energy industry or taken up PhD positions. An alumni group has been started that actively gives support to past, present and potential future students.

  • 2. Beckman, William A
    et al.
    Broman, Lars
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Fiksel, Alex
    Klein, Sanford A
    Lindberg, Eva
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Schuler, Mattias
    TRNSYS, the most complete solar energy system modeling and simulation software1994Ingår i: Renewable energy, ISSN 0960-1481, E-ISSN 1879-0682, Vol. 5, nr 1-4, s. 486-488Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The five computer programs TRNSYS, PRESIM, TRNSED, ONLINE, and PREBID have been put together into a program package which is the most complete solar energy system modeling and simulation software that is available today.

  • 3.
    Broman, Lars
    et al.
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Bales, Chris
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Lindberg, Eva
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Lorenz, Klaus
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Rönnelid, Mats
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Rapport ramprogram FOU 1993-96, Projektnr 930391-05 samt förslag till ramprogram solfångarutveckling och systemteknik FOU 1997-99 solfångarutveckling och systemteknik1997Rapport (Övrigt vetenskapligt)
  • 4.
    Broman, Lars
    et al.
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Jarefors, Kenneth
    Lindberg, Eva
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Marks, Jörgen
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Square cones for TPV: experiments and computer simulations1998Ingår i: Fourth NREL Conference on Thermophotovoltaic Generation of Electricity, Denver, CO, USA, 1998Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    The efficiency of a TPV generator is very dependent on selective optical properties of the chain emitter-filter-TPV cell-reflective backing. If a selective reflective edge filter using multiple reflections in dielectric layers is employed, the slope of the edge depends on the incidence angle interval. A special geometry, consisting of a double square cone between the (square) emitter and the (square) cell array, which narrows this angle interval significantly, has been constructed and investigated experimentally as well as with ray tracing analysis.

  • 5.
    Broman, Lars
    et al.
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Jarefors, Kenneth
    Marks, Jörgen
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Lindberg, Eva
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Enhancing the optical efficiency of a thermophotovoltaic generator using square cones in combination with interference filters1998Ingår i: Second World Conference on Photovoltaic Solar Energy Conversion, Wien, Österrike, 1998Konferensbidrag (Refereegranskat)
    Abstract [en]

    The optical efficiency is a week link in all TPV systems. Many different approaches have been studied earlier, but not much on the possibility to use interference filters. Such filters can be designed to get alsmost any desired optical performance, as long as it is allowed to use a large number of layers in the multilayer stack. In practical applications this is very often not acceptable. Nevertheless such filters can still be quite good, at least for a very narrow range of incident angles. Therefore a double-cone geometry is proposed to be used in combination with such filters. This geometry will limit the range of incident angles onto the filter, which will then act more efficiently. The influence of the geometry is evaluated by means of model experiments, and a computer program has been constructed to be able to simulate this type of geometry using ray-tracing technique.

  • 6. Broman, Lars
    et al.
    Lindberg, Eva
    Högskolan Dalarna, Akademin Industri och samhälle, Energi och miljöteknik.
    Reflection losses from cylindrical concave absorber glazings and PV module surfaces1989Rapport (Övrigt vetenskapligt)
  • 7.
    Broman, Lars
    et al.
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Lindberg, Eva
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Börjesson, Kent
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Optical properties of the Czechoslovakian Fresnel lens measured using a laser beam1989Ingår i: ISES Solar World Congress, Kobe, Japan, 1989Konferensbidrag (Refereegranskat)
    Abstract [en]

    Linear glass Fresnel lenses have been experimentally investigated by means of a narrow He-Ne laser beam, both at normal incidence and at various combinations of meridional and sagittal angles of incidence. Both rays incident on the flat and on the grooved side were studied. Results were compared with previous ray tracing results by Franc et al. The experiments suggest, contrary to ray tracing, that the grooves should face the sun in other than sun-tracking applications.

  • 8.
    Broman, Lars
    et al.
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Rönnelid, Mats
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Binder, Betty
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Lindberg, Eva
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Use of nonimaging concentrators for moderate concentration of sunlight onto PV cells1989Ingår i: 9thy European Photovoltaics Solar Energy Conference, Freiburg, Tyskland, 1989Konferensbidrag (Refereegranskat)
    Abstract [en]

    The square cornet type nonimaging concentrator has been shown useful for moderate concentration of sunlight onto photovoltaic solar cells, since it creates no hot spots at the exit aperture. In this paper are presented the mathematical formulas on which the cornet designs are based, results from computer simulations on overall cornet performance compared with measurements as well as exit aperture intensity variations, measured optical concentration ratios under controlled circumstances, and cell temperature measurements under realistic circumstances. In an Appendix are given performance curves for a large number of cornets as determined from computer simulations, covering the useful range of concentration factors and acceptance angles.

  • 9.
    Lindberg, Eva
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Geometries for enhancing the output from PV cells1997Rapport (Övrigt vetenskapligt)
    Abstract [en]

    In a world of limited resources and increasing demand for energy sources, especially in developing countries, PV cells are of great interest. Despite fairly large efforts in certain countries, among them Sweden, in R&D of new technology, the cells are still expensive regarding cost per watt. Obviously there should be interest also in other solutions than increasing cell efficiency for enhancing the output from the PV systems. Some solutions could be different geometries of both the PV cells and the PV cells combined with concentrating equipment such as cones and cornets, lenses, or V-trough mirror concentrators. Geometries studied in this thesis are: square comets, linear Fresnel lenses, V-trough/Fresnel lens combinations, concave and convex cylindrical surfaces, and PV panels mounted an an adjustable rack. Square cornets with flat mirrors have even light distribution at the exit aperture, which is an advantage over circular cornets and CPC cones which have uneven light distribution and cause hot spots at the exit aperture. Measurements and calculations on silver coated and aluminum coated cornets indicated that arrangements with comets having a PV cell at the exit aperture are technically worthwhile. The concentration depends on the geometry of the comet and the reflector material of the surface. The low cost, compared to PV cells, of polished and coated 0.7 mm aluminum makes it probable that the use of cornet concentrators would reduce the cost per produced kWh. Factors to take into account are the higher labor and material costs for manufacturing modules with cornets. Direct sunlight can be concentrated by lenses. Since large ordinary lenses are too bulky, flat linear or circular Fresnellenses are the only practical lenses for solar energy applications. The Fresnel lens is however less perfect than ordinary lenses since not all incident rays hit facets. The linear Czech Fresnel lens is made of glass and mass-produced in an inexpensive and technically simple method, but the surface is not optically perfect due to a slight sagging of the rolled grooved surface during the hardening of the glass. The ray tracing results have therefore been supplemented with measurements. Both rays incident on the flat surface and on the grooved surface were studied, as well as normal incidence and various combinations of meridional and sagittal angles of incidence. The measurements show that focallength varies from 35 cm to 60 cm for focal band widths about 5 cm, depending on incidence angles and whether the flat or grooved surface faces the sun. This Fresnellens could be combined with a PV panel consisting of solar cells connected in series in one row, which is placed in the focal band. The Czech Fresnellens could also be combined with a V-trough mirror concentrator and with one row of PV cells or one long, thin-film PV cell at the bottom of the trough. A test bench has been constructed, and six different geometries have been studied: For all of these geometries four cases have been studied: troughs without the lens, with the flat surface of the lens and the grooved surface facing the sun, and the lens only with the mirrors covered. The concentration was measured by comparing the short circuit current from a PV cell at the bottom of the trough. The measurements indicated that the acceptance angle is larger when the grooved surface faces the sun than when the flat surface faces the sun, but the concentration is slightly larger when the flat surface faces the sun. For the investigated geometries the light concentration varies from 1.9 to 3.2. The reflection losses from a flat surface are large for high incidence angles. At high latitudes a substantial part of the sunlight hits the surface of a stationary PV panel at high incidence angles. In order to reduce the reflection losses one solution could be to produce thin-film PV panels with concave or convex surfaces. Calculations have been carried out for six different refractive indices of the surface and six different ratios between the depth of the curved surface and the width of the surface. For all these combinations the conditions for both one surface and two surfaces (panes) have been calculated. The results show that for transparent concave panes the overall reflection losses could be reduced by one to two percent units compared to a flat surface. The last idea investigated was the improvement of PV panel output by changing the panel azimuth thrice daily. Calculations were carried out for three different latitudes at locations in the north, the middle and the south of Sweden in order to estimate the most suitable azimuths and tilt angles for the three azimuth changes. The calculations show that the insolation could be increased by 38 %,30 %, and 28 %, respectively, as compared with a stationary panel. Measurements were carried out in Borlänge, the middle location. The voltage and current from two panels, one fixed at the best tilt and one turned thrice daily, were measured every sixth minute and stored using a data logger. For four days in July with normal weather the gain was 30 % compared to the stationary panel, and for seven days in August with sunny weather the gain was 39 %. If a simple and inexpensive adjustable mount could be manufactured, this idea would be very interesting in order to enhance the PV output for a small panel of a few modules to be used, for instance, at a summer cottage.

  • 10.
    Lindberg, Eva
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Rapport från 20th European Photovoltaic Solar Energy Conference and Exhibition: Barcelona 6-10 juni 20052005Rapport (Övrigt vetenskapligt)
    Abstract [sv]

    På uppdrag av STEM bevakade Eva Lindberg från Centrum för solenergi-forskning, SERC, Högskolan Dalarna, 20th European Photovoltaic Solar Energy Conference and Exhibition, Barcelona, 6-10 juni 2005. Ca 1700 personer fanns på deltagarlistan. På grund av konferensen omfattning kan endast ett litet urval av föredrag och utställare kommenteras i rapporten. Konferensprogrammet var indelat på följande områden: 1. Grundläggande fakta, nya komponenter och material 2. Kristallina kiselsolceller and materialteknologi 3. Amorft och mikrokristallint kisel 4. CIS, CdTe och andra (II-VI) ternära tunnfilmsceller 5. PV-moduler och komponenter i PV-system 6. PV-system i nätanslutna applikationer 7. Globala aspekter på PV-solelektricitet 8. PV-industrins resultat FoU om kristallina solceller dominerade stort, sedan tunnfilmsceller av främst amorft kisel. Intressant var att återvinning är föremål för FoU; dels återvinning av kiselsolceller när panelen tjänat ut; dels återvinning av Cu, Cd, Se och Te när tunnfilmscellerna tas ur bruk. 237 företag fanns representerade i utställningen, varav 20 från Kina. Tyskland dominerade stort. Utställningen teman var följande: 1) Tillverkare av kiselplattor, solceller, PV-moduler, koncentratorer, solföljare (se bild nedan) 2) Tillverkare och återförsäljare av utrustning och material 3) Integrering och distribution av system 4) Mätningar och kontrollteknologi 5) Forskning och laboratorier 6) Service, teknik, konsulting 7) Myndigheter och föreningar 8) Media och förlag 9) Tillverkare av inverterare 10) Övrigt.

  • 11.
    Lindberg, Eva
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Solar energy in Czechoslovakia1990Rapport (Övrigt vetenskapligt)
    Abstract [en]

    The purpose of my tour to Czechoslovakia was to participate the Third International Conference Applied Optics in Solar Energy, which was held in Prague, Octoher 2-6, 1989, and then visit some scientific institutes and solar collector plants as guest of the Czechoslovakian Academy of Science. This was made possihle hy an exchange researcher grant from the Royal Swedish Academy of Engineering Sciences.

  • 12.
    Lindberg, Eva
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Solar position diagram1990Rapport (Övrigt vetenskapligt)
    Abstract [en]

    Program SOLVEJ är ett användarvänligt program som visar solens vandring över himlavalvet vid upp till fem valfria datum och vid valfri ort. Programmet är utvecklat av två skäl. För det första, att demonstreras för en intresserad allmänhet som del av vandringsutställning om solenergi, vilken är initierad och utarbetad av SERC. För det andra, att användas av solenerglintressenter för att snabbt få en uppfattning om solinstrålningen på en ort vid olika tidpunkter på året. Indata till programmet ges från tangentbordet. Som svar på frågor skrivs för vilken ort diagrammet skall gälla, max fem datum, ortens latitud och longitud, som anges positiv i västlig riktning, samt tidszonen. Varje uppgift avslutas med tryck på tangenten ENTER. Programmet kommer nu att rita ett koordinatsystem på skärmen. Första axeln visar vädersträcken, norr, öster, söder, väster och norr, varje delstreck utgör 10 grader. För södra halvklotet byter norr och söder plats. Andra axeln visar höjden över horisonten i grader, 0 till 90 grader och 10 grader för varje delstreck. Efter några sekunder ritas diagrammet upp med solhöjden som funktion av väderstrecket och varje hel timme markerad. Se fig. 1-4. Slutligen frågas efter om diagrammet skall ritas ut på printer. SOLVEJ avbrytes med att trycka CTRL+BREAK. SOLVEJ är skrivet i Quick-BASIC (se App. 1) och leveras både som källkod och körklar version. Lämplig dator är IBM-kompatibel AT med EGA- eller VGA-skärmkort (ej Herkules Lämplig printer är IBM Proprinter eller liknande matrisskrivare, kopplad till LPT1 på kommunikationskortet. Till grund för beräkningarna har använts artikeln On Calculating the Position of the Sun, publicerad i nr. 1 1988 av The International Journal of Ambient Energy. Fem empiriska ekvationer beträffande beräkningar av solens position har studerats för att undersöka deras tillförlitlighet. Felaktigheter på fem grader eller mer kan uppträda om man använder sig av de enkla ekvationer som kan hittas solenergi-böcker och som inte kräver tillgång till dator. FORTRAN-rutinen SUNAE2 (se App. 2) beräknar solpositionen med noggrannast kända metod. Program SOLVEJ är en utveckling av SUNAE2.

  • 13.
    Lindberg, Eva
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Ten years experience of a 3 kW grid connected system with three different inverters2005Ingår i: Proceedings of the 20th European Photovoltaic Solar Energy Conference, Barcelona, 2005Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    During 1994 a PV array of 72 modules à 45 Wp was installed at the roof the main buildning of Dalarna University, Borlange, Sweden. 32 of theses modules were connected to NEG 1600 inverter, and in 1996 the remaining 40 modules were connected to Solvex 2065. After some years the output of NEG 1600 decreased, and the whole system performance was investigated in detail as a student project. The fragile part was found to be the inverter, and when this inverter finally stop working it was replaced by NT 1800 in 2004. The performance of the three inverter systems are monitored and compared, losses and errors are analyzed and presented. The new inverter NT 1800 shows much superior performance as compared to the old Solvex inverter, an increase of 30% of the annual yield can be obtained. Studies show that inverter designs are improved significantly in recent years. Efficiency at partial loads have increased and more accurate MPPT algorithms are employed.

  • 14.
    Lindberg, Eva
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    TPV optics studies: on the use of non-imaging optics for improvement of edge filter performance in thermophotovoltaic applications2002Doktorsavhandling, monografi (Övrigt vetenskapligt)
  • 15.
    Lindberg, Eva
    et al.
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Broman, Lars
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    A computer study of the improvement of PV panel monthly outputs when the panel azimuth is changed thrice daily1994Rapport (Övrigt vetenskapligt)
    Abstract [en]

    The purpose of the calculations was to estimate the most suitable slopes and azimuths for three different positions per day of a solar panel in order to obtain the most possible energy from the PV panel compared with a stationary PV panel. The calculations were made in the computer program PV F-CHART.

  • 16.
    Lindberg, Eva
    et al.
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Broman, Lars
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    An animation tool for demonstrating the importance of edge filters in thermophotovoltaic applications2002Ingår i: Renewable energy, ISSN 0960-1481, E-ISSN 1879-0682, Vol. 28, s. 1305-1315Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In order to achieve high efficiency in a thermophotovoltaic (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, and one suggestion is to place an edge filter between the emitter and the TPV cell array in an elliptical optic design. An animation tool, developed in the Excel® program, for determining the efficiency of an optical system is presented. The animation components are a black body emitter, an edge filter, and an array of TPV cells. The tool has been used to demonstrate the importance of an efficient filter and the usefulness of optics that makes the edge of the filter as sharp as possible.

  • 17.
    Lindberg, Eva
    et al.
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Broman, Lars
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    An animation tool for demonstrating the importance of edge filters in thermophotovoltaic applications2003Ingår i: Renewable energy, ISSN 0960-1481, E-ISSN 1879-0682, Vol. 28, s. 1305-1315Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In order to achieve high efficiency in a thermophotovoltaic (TPV) generator, it is important that a high fraction of emitted photons with energies below the TPV cell band gap are reflected back to the emitter. This can be accomplished in several ways, and one suggestion is to place an edge filter between the emitter and the TPV cell array in an elliptical optic design. An animation tool, developed in the Excel program, for determining the efficiency of an optical system is presented. The animation components are a black body emitter, an edge filter, and an array of TPV cells. The tool has been used to demonstrate the importance of an efficient filter and the usefulness of optics that makes the edge of the filter as sharp as possible. It is available at www.du.se/tpv.

  • 18.
    Lindberg, Eva
    et al.
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Broman, Lars
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Edge filters in thermophotovoltaic applications2001Ingår i: 17th European Photovoltaic Solar Energy Conference, München, Tyskland, 2001Konferensbidrag (Refereegranskat)
    Abstract [en]

    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 emitter at one end, an edge filter at the wide center, and the TPV array at the other end. This geometry has so far been studied by means of both ray tracing analysis and by means of measurements with a simulated emitter. A sharp switchover from transmission to reflection in a multiple layer dielectric filter can be achieved only if the angles of the incident rays are confined to a fairly narrow interval. The two methods both show thet the studied optics can lower the angular spread of rays incident onto the filter and that some 96% of the emitted rays (in the ideal case) reach their goal without passing the filter more than once.

  • 19.
    Lindberg, Eva
    et al.
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Broman, Lars
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Fabergé optics and edge filter for a wood powder fuelled thermophotovoltaic system2002Ingår i: Renewable energy, ISSN 0960-1481, E-ISSN 1879-0682, Vol. 28, s. 373-384Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    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 eggshaped double cone with the emitter at one end, an edge filter at the wide center, and the TPV array at the other end. This geometry has so far been studied by means of both ray tracing analysis and by means of measurements with a simulated emitter. A sharp switchover from transmission to reflection in a multiple layer dielectric filter can be achieved only if the angles of incident rays are confined to a fairly narrow angular interval. The two methods both show that the studied optics can lower the angular spread of rays incident onto 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. The concept of the whole of the wood powder fuelled TPV system is also given.

  • 20.
    Lindberg, Eva
    et al.
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Broman, Lars
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Non-imaging optics in a thermophotovoltaic generator2002Ingår i: Fifth Conference on Thermophotovoltaic Generation of Electricity, Rome, Italy, 2002Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    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.

  • 21.
    Lindberg, Eva
    et al.
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Broman, Lars
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Bales, Chris
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    ESES, A European Master's Program In Solar Energy Engineering2004Ingår i: Eurosun 2004, Freiuburg, Germany, 2004Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    The first group of students was admitted to the European Solar Engineering School, a master’s level two-semester program at Dalarna University in Sweden, in August 1999. Now that the fifth group is all but through their year, some conclusions from our experiences are possible to draw. The paper gives the background of ESES, some information about how the program is arranged, and also some of the ESES staff experiences.

  • 22.
    Lindberg, Eva
    et al.
    Högskolan Dalarna, Akademin Industri och samhälle, Energiteknik.
    Fiedler, Frank
    Högskolan Dalarna, Akademin Industri och samhälle, Energiteknik.
    Bales, Chris
    Högskolan Dalarna, Akademin Industri och samhälle, Energiteknik.
    Past and future of European Solar Energy School2007Ingår i: Proceedings of ISES Solar World Congress 2007: Solar energy and human settlement, vols I-V, 2007, Vol. 4, s. 3014-3018Konferensbidrag (Refereegranskat)
    Abstract [en]

    The European Solar Engineering School ESES is a one-year master program that started in 1999 at the Solar Energy Research Center SERC, Dalarna University College. It has been growing in popularity over the years, with over 20 students in the current year. Approximately half the students come from Europe, the rest coming from all over the globe. This paper describes the contents and experiences from eight years of running the programme an the adapting the programme to the Bologna process. The majority of the students from ESES have found work in the solar industry, energy industry or taken up PhD positions. An alumni group has been started that actively gives support to past, present and potential future students.

  • 23.
    Lindberg, Eva
    et al.
    Högskolan Dalarna, Akademin Industri och samhälle, Energi och miljöteknik.
    Fiedler, Frank
    Högskolan Dalarna, Akademin Industri och samhälle, Energi och miljöteknik.
    Bales, Chris
    Högskolan Dalarna, Akademin Industri och samhälle, Energi och miljöteknik.
    Rönnelid, Mats
    Högskolan Dalarna, Akademin Industri och samhälle, Energi och miljöteknik.
    Review of an International Master Programme in Solar Energy Engineering2008Ingår i: Eurosun 2008, Lisbon, 2008Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    The European Solar Engineering School ESES is a one-year master programme that started in 1999 at the Solar Energy Research Center, SERC, Dalarna University College. The programme, run in English, consists of courses which cover passive and active solar thermal, solar energy for tropical climates, PV and PV/Hybrid system design, and have sections on topics such as economy and social aspects as well as other renewable energy sources. ESES is then finished with a research project as thesis work. Over the years the contents have been evolved and improved, and new experimental work has been introduced. The programme has been growing in popularity over the years, with over 20 students each year. Approximately half of the students come from Europe, the rest coming from all over the globe. This paper describes the contents and experiences from eight years of running the programme. The majority of the students from ESES have found work in the solar industry, energy industry or taken up PhD positions. An alumni group has been started that actively gives support to past, present and potential future students.

  • 24.
    Lindberg, Eva
    et al.
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Kraus, Alex
    Broman, Lars
    Högskolan Dalarna, Akademin Industri och samhälle, Miljöteknik.
    Animation tool and Q. E. measurements for estimating the optimum system efficiency of a TPV generator2004Ingår i: Sixth Conference on Thermophotovoltaic Generation of Electricity, Freiburg, Tyskland, 2004Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    In order to achieve high efficiency in a thermophotovoltaic (TPV) generator, it is important that a high fraction of emitted photons with energies below the TPV cell band gap are reflected back to the emitter. This can be accomplished in several ways, and one possibility is to place an edge filter between the emitter and the TPV cell array in an elliptical optic design. By this arrangement the cooling demand on the TPV cells is reduced and the reflected radiation is reused in the emitter, the fuel demand is decreased. An animation tool, developed in the Excel program, for determining the optical availability in such a system has been presented previously. The animation components were a blackbody emitter, an adjustable edge filter, and an array of TPV cells. The tool was used to demonstrate the importance of an efficient filter and the usefulness of optics that makes the edge of the filter as sharp as possible. In such a system the TPV cells are the dominant cost. It is possible to tailor the selective filter in order to fit the bandgap of a certain TPV cell. For this purpose it is a great advantage to be able to measure the Quantum Efficiency Q.E. of the cell and how Q.E. changes at different temperatures. When this behaviour is known it is possible to tailor the selective edge filter in order to get higher efficiency. A simple measurement setup has been developed utilizing a lamp with IR reflector, a monochromator, a radiometer, and a heating system based on hot water. The animation tool has been further developed for estimating the optical efficiency, and more factors may be varied. The tool can now handle also the emittance of the emitter, absorption losses in mirrors and filter, as well as TPV cell characteristics such as adjustable Q.E., fill factor FF, and Uoc/(Eg/q).

  • 25.
    Wäckelgård, Ewa
    et al.
    Högskolan Dalarna, Akademin Industri och samhälle, Energi och miljöteknik.
    Broman, Lars
    Lindberg, Eva
    Högskolan Dalarna, Akademin Industri och samhälle, Energi och miljöteknik.
    Reflection properties of uncoated metal surfaces: A literature study1988Rapport (Övrigt vetenskapligt)
1 - 25 av 25
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