柜式空调器室内机送风角度对室内热舒适性影响的数值分析

Numerical Simulation to the Effect of Indoor Thermal Comfort on Air Supply Angle of Indoor Unit of Cabinet Form Air-conditioner

采用CFD方法对15种不同送风角度的办公室房间的室内速度场、温度场、PPD值进行了数值模拟。模拟结果表明,不同送风角度,室内温度分布差异很大:垂直方向,随着送风角度的增大,工作区温度升高;水平方向,送风角度过大,室内温度分布不均匀。计算了不同送风角度下的PPDη值,结果表明,不同送风角度,人员不满意度区别明显,对室内热舒适性影响很大。综合比较得出向上15°、向右15°的送风角度为最佳送风角度。

Indoor velocity fields, temperature fields and PPD were simulated on fifteen different air supply angle by the CFD method. The simulation results indicated that there is much difference on the distribution of indoor temperature on different air supply angle; temperature of the work area raises with the air supply angle in the vertical direction; the distribution of indoor temperature is inhomogeneous if the air supply angle was much in the horizontal direction. The vale of PPDη under different air supply was calculated .The result shows obvious difference of dissatisfaction of staff and great effect of indoor thermal on different air supply angle. The best air supply angle is the one of 15 degree upward, 15 degree right by comprehensive comparison.