PAPERS SELECTED FOR THE SYMPOSIUM

• INFLUENCE OF THE WIND ON THE WORKING PARAMETERS OF THE FLAT PLATE COLLECTORS

  Vukman Bakić - Laboratory for Thermal Engineering and Energy, Institute of Nuclear Sciences Vinca, , PO.Box.522, 11000 Belgrade, Serbia , Goran Zivković - Laboratory for Thermal Engineering and Energy, Institute of Nuclear Sciences Vinca, PO.Box.522, 11000 Belgrade, Serbia , Milada Pezo - Laboratory for Thermal Engineering and Energy, Institute of Nuclear Sciences Vinca, , PO.Box.522, 11000 Belgrade, Serbia , Branislav Stanković - Laboratory for Thermal Engineering and Energy, Institute of Nuclear Sciences Vinca, , PO.Box.522, 11000 Belgrade, Serbia , Valentina Turanjanin - Laboratory for Thermal Engineering and Energy, Institute of Nuclear Sciences Vinca, , PO.Box.522, 11000 Belgrade, Serbia

  Abstract Text

  This paper deals with the numerical simulation of air flow (induced by the wind) around the arrays of flat plate collectors and determination of the flow field, which should provide a basis for convective heat losses, as a parameter which... show full text »
  Abstract Text

  This paper deals with the numerical simulation of air flow (induced by the wind) around the arrays of flat plate collectors and determination of the flow field, which should provide a basis for convective heat losses, as a parameter which influences their working characteristics. The heat losses are the result of the reflection on the glass, conductive losses at the collector’s absorber plate, radiation of the absorber plate and convective losses on the glass. Wind velocity in the vicinity of the absorber plate depends on its position in the arrays of collectors. The results of the numerical simulation of flow around collectors are boundary conditions, and they are used for modeling thermal-hydraulic processes inside the solar collector. In this paper method for coupling thermal-hydraulic processes inside the collector with analyses of the heat transfer from plate to tube bundle is developed for determinate distribution of the temperature of the absorber plate and the efficiency of the flat plate collectors. Analyses of flow around arrays of collectors are preformed with RNG k - ε model. Free-stream velocity is 1 m/s, 5 m/s and 10 m/s and angle of attack is 20o and 40o. Heat transfer coefficient is determined from the theory of boundary layer. Heat transfer inside the plate cavity is analized for constant intensity of radiation. « hide
  Symposium Session: Thermal, hydro, wind and other Power Plants | Eksploatacioni problemi termo, hidro, vetro i drugih elektrana