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2009 | Vol. 30, no. 3 | 45-74
Tytuł artykułu

Simulation of the influence of design and meteorological factors on the efficiency of a solar plate collector

Autorzy
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
A mathematical model of heat transfer between the components of a solar collector and the surroundings is proposed. The model consists of the equations of heat balance for glass-covers, absorber and the rear side of a collector, as well as the heat transfer from the absorber to the heat carrying medium inside the collector. The heat balance equations take into consideration solar radiation, conduction, convection and infrared radiation between the components of the collector and its surroundings. Heat flow is calculated for solar collectors with two-glass and single-glass covers and the case where there is no cover. The subject of the investigation was to analyse the influence of different design characteristics (physical properties of materials, thickness of particular elements, distances between them) and parameters of surroundings on the efficiency of the collector. The optimal values of thickness of insulation and distances between the glass covers and the absorber, as well as other parameters were specified. The best conditions for using a collector with a double glass cover, with one glass cover and without any transparent cover were analysed. A solar collector performs better with a two-glass cover than with only a single-glass cover if the collector does not have a selective coating or if the temperature of the heat-carrier is high enough. This difference in performance, however, is not significant.
Wydawca

Rocznik
Strony
45-74
Opis fizyczny
Bibliogr. 16 poz.,Rys., tab., wykr., wz.
Twórcy
  • Department of Engineering and Technical Sciences, University of Warmia and Mazury in Olsztyn, Oczapowski St. 11, 10-736 Olsztyn, Poland
Bibliografia
  • 1. LIU B., JORDAN R.: A rational procedure for producing the long-term average performance of flat-plate solar energy collectors, Solar Energy, 1963, 7(2), 53-73.
  • 2. KLEIN S., BECKMAN W., DUFFIE J.: A design procedure for solar air heating systems, Solar Energy, 19(5), 1977, 509-512.
  • 3. COLLARES-PEREIRA M., RABL A.: Derivation of method for predicting long term average energy delivery of solar collectors, Solar Energy, 23(3), 1979, 223-233.
  • 4. RABL A.: Active Solar Collectors and Their Applications, Oxford University Press, New York 1985.
  • 5. GARRISON J.D.: A program for calculation of solar energy collection by fixed and tracking collectors, Solar Energy, 73(4), 2002, 241-255.
  • 6. PLUTA Z.: Theoretical Basis for Photo-Thermal Solar Energy Conversion, Oficyna Wydawnicza Politechniki Warszawskiej, Warszawa 2000 (in Polish).
  • 7. SMOLEC W.: Photo-Thermal Solar Energy Conversion, Wydawnitwo Naukowe PWN, Warszawa 2000 (in Polish).
  • 8. CHOCHOWSKI A.: Analysis of Thermal States of a Flat Solar Collector, SGGW, Warszawa 1991 (in Polish).
  • 9. KLEN S.: Calculation of flat plate utilisability, Solar Energy, 21(5), 1978, 393-402.
  • 10. DUFFIE J.A., BECKMAN W.A.: Solar Engineering of Thermal Processes, John Wiley & Sons, New York 1991.
  • 11. PETTIT R., SOWELL R.: Solar absorption and emittance properties of several solar coatings, J. Vac. Science Technology, 13(2), 1976, 596-602.
  • 12. ZHANG QI-CHU, MILLS D.R.: High solar performance selective surface using bisub-layer cermet film structures, Solar Energy Materials and Solar Cells, 27(3), 1992, 273-290.
  • 13. BERDAHL P., MARTIN M.: Emissivity of clear skies, Solar Energy, 32(5), 1984, 663-664.
  • 14. MICHEEV M.A. and MICHEEV I.M.: Fundamentals of Heat Transfer, Energia Publishing House Publication, Moscow 1973 (in Russian).
  • 15. ASHRAE 93-96 Standard. Method of Testing to Determine the Thermal Performance of Solar Collectors, ASHRAE Inc., New York Atlanta 1986.
  • 16. AL-NIMR M.A., KODAH Z. & NASSAR B.: A theoretical and experimental investigation of a radiative cooling system, Solar Energy, Vol. 63, 1998, No. 6, 367-373.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.baztech-article-BGPK-2581-9927
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