Numerical Calculation of Displacement Ventilation Char-acteristics of Side Wall Upper/Lower Air Outlets
An office model with displacement ventilation with air outlets placed on side walls and dis-placement ventilation with air outlets placed under side walls was established.Numerical calculations were conducted to analyze the distribution characteristics of air temperature and velocity within the in-door working area.The temperature unevenness coefficient,velocity unevenness coefficient and venti-lation efficiency of the two displacement air supply air supply arrangements were compared.The re-sults show that under the same conditions of indoor cooling load and air supply parameters,compared with the displacement ventilation with the air outlet placed under the side wall,the temperature in the working area of the displacement ventilation with the air outlet placed under the side wall is about 0.7℃ lower,and the temperature distribution is better,but the ventilation efficiency is 10%.