Sökning: "solar absorber"

Visar resultat 6 - 10 av 54 avhandlingar innehållade orden solar absorber.

1. 6. Gas-filled, flat plate solar collectors

   Författare :Johan Vestlund; Högskolan Dalarna; []
   Nyckelord :Solar collectors; Modelling; Mechanical stresses; Heated cavity; collector material; Högeffektiva solfångare för svensk produktion;

   Sammanfattning : This work treats the thermal and mechanical performances of gas-filled, flat plate solar collectors in order to achieve a better performance than that of air filled collectors. The gases examined are argon, krypton and xenon which all have lower thermal conductivity than air. The absorber is formed as a tray connected to the glass. LÄS MER

3. 7. Calculation and Measurement Methods for the Performance of Solar Collectors. Models of Flat Plate Collectors, Transparent Insulation and Efficiency Factors

   Författare :Bengt Hellström; Avdelningen för Energi och byggnadsdesign; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Transparent insulation; Test method; Calculation method; Concentrating collector; Efficiency factor; Fin efficiency; Flat plate collector; Heat conductivity; Honeycomb; Measurement method; Performance; Solar transmittance; Solar collector; Collector model; Energy research; Energiforskning;

   Sammanfattning : This thesis deals with models of flat plate collectors, transparent insulation and efficiency factors. An equation for the energy output from a glazed flat plate collector is derived by modelling the collector efficiency factor, F´ as the sum of a constant and a temperature dependent part. LÄS MER

4. 8. Studies of Semiconductors Modified with Nanoscale Light Absorbers for Solar Cell Application

   Författare :Boriss Mahrov; Hans Siegbahn; Anders Hagfeldt; Håkan Rensmo; Gerrit Boschloo; Gary Hodes; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; photoelectron spectroscopy; dye-sensitized; solar cells; inorganic light absorber; nanostructure; mesoporous; photovoltaic devices; Fysik; Physics; Fysik;

   Sammanfattning : Recently, materials such as hole conductors (CuI, CuSCN) and light absorbers (Ru-complexes, CuInS2) have been actively investigated for application in nanocrystalline solar cells. In this thesis combinations of these materials have been studied. LÄS MER

5. 9. On Generation and Recombination in Cu(In,Ga)Se2 Thin-Film Solar Cells

   Författare :Jonas Malmström; Lars Stolt; Uwe Rau; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronics; solar energy conversion; solar cells; Cu In; Ga Se2; device modelling; optical properties; electron-hole generation; light trapping; electron-hole recombination; Elektronik; Electronics; Elektronik;

   Sammanfattning : The solar cell technology based on Cu(In,Ga)Se2 (CIGS) thin-films provides a promising route to cost competitive solar electricity. The standard device structure is ZnO:Al/ZnO/CdS/CIGS/Mo films on a glass substrate, where the first three layers are n-type semiconductors with wide bandgaps, forming a pn-junction with the p-type CIGS absorber layer; the Mo layer serves as a back contact. LÄS MER

7. 10. Solar Thermal Collectors at High Latitudes : Design and performance of non-tracking concentrators

   Författare :Monika Adsten; Manuel Collares-Pereira; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Solar thermal collectors; concentrators; CPC; high latitudes; Materialvetenskap; Solfångare; koncentratorer; höga latituder; Materials science; Teknisk materialvetenskap; Solid State Physics; fasta tillståndets fysik;

   Sammanfattning : Solar thermal collectors at high latitudes have been studied, with emphasis on concentrating collectors. A novel design of concentrating collector, the Maximum Reflector Collector (MaReCo), especially designed for high latitudes, has been investigated optically and thermally. LÄS MER