置换通风系统室内温度分布的实验研究

Experimental study of indoor temperature distribution for displacement ventilation system

实验研究了置换通风系统送风参数和环境参数对室内温度场分布特性的影响。测量了不同送风量、送风温度和夹层空气温度下室内不同测点及人体不同部位上的竖直温度分布,并将实验值与CFD模拟结果进行比较,结果表明二者吻合较好。不同参数条件下的实验结果表明,随着送风量的增大,热分层高度相应提高,但送风量达到一定值后,其对竖直温度梯度的影响明显减小;送风温度的变化只对室内整体温度产生影响,而几乎不影响室内温度梯度;夹层空气温度的升高对室内下部温度影响不大,而上部区域温度升高明显。

Investigates the effects of supply air parameters and ambient parameters on the temperature field. Tests the vertical temperature distribution in the room and the temperature around the person under different supply air rates, supply air temperature, and interlayer air temperature, the comparison between numerical and experimental results shows good agreement. The experimental results under different conditions indicate that the height of the thermal stratification rises with the increasing of the supply air rate, but when the supply air rate comes up to a certain value, its influence on the vertical temperature gradient is weakened significantly. The variety of supply air temperature only influences the room temperature, but not notably the vertical temperature gradient. The increase of air temperature in the interlayer has a little effect on the temperature in the lower zone, but the temperature in the upper zone rises significantly.