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In order to obtain a better understanding of flow characteristics of displacement ventilation,thethree-dimensional numerical models are developed using the CFD technology.The numericalsimulation results are verified by experiments,based on this,the velocity and temperature distributionof three-dimensional displacement ventilation system with single and double heat sources are studied.Velocity and temperature fields under two different cases of heat source are analyzed and compared.The numerical results show that there are three layers in vertical temperature fields of displacementventilation system with single or double heat sources,and the vertical temperature distribution ofsingle heat source is different from that of double heat sources.When indoor load is large,the comfortrequirement of people indoor can’t be satisfied with displacement ventilation system only,thus anadditional refrigeration system is necessary.Furthermore,under the condition of two heat sources,thedisplacement ventilation parameters can’t be computed simply according to single heat source inletparameters,therefore the interaction between heat sources should be considered.
In order to obtain a better understanding of flow characteristics of displacement ventilation, the three-dimensional numerical models are developed using the CFD technology. Numericalulation results are verified by experiments, based on this, the velocity and temperature distribution of three-dimensional displacement ventilation system with single and double heat sources are studied. Velocity and temperature fields under two different cases of heat source are analyzed and compared. The numerical results show that there are three layers in vertical temperature fields of displacementventilation system with single or double heat sources, and the vertical temperature distribution ofsingle heat source is different from that of double heat sources.When indoor load is large, the comfortrequirement of people indoor can not be satisfied with displacement ventilation system only, thus an additional refrigeration system is necessary.Furthermore, under the condition of two heat sources, thedisplacement ven tilation parameters can not be computed simply according to single heat source inletparameters, therefore the interaction between heat sources should be considered.