Research and Application About Flow Field of Wet Cooling Towers and Numerical Simulation of Windshield Board
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Abstract
Based on the Fluent software, we used the standard k-εmodel to close the Reynolds average equations and analyze the heat and mass transfer process in the three-dimensional of the natural draft wet cooling towers (NDWCT) for the specific project .We calculated the fields of air velocity and temperature inside and outside the cooling tower and established the relevant equations and gas-water two-phase heat and mass transfer theory models. Combined with the actual situation of the project, we deeply analyze the Flow Field of the cooling tower: 1) the existence of windshield board reduces the air flow around the tower side flow rate and increases the symmetry of the cooling tower inlet flow field, so that the uniformity of tower aerodynamic field was increased. Installation height and length of windshield board have a greater impact into the air flow field. Especially, the 11m high, 8m long windshield board improve the performance of # 1, # 2 cooling tower mostly. 2) Installation angle and blocks number of windshield board have certain impact into the air flow field.When the windshield board angle change from 0° to 20° and the blocks number change from 60 to 90, there was little changes of cooling performance between the two towers.
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