地板送风技术条件与舒适条件的研究

Technical and comfort conditions with the underfloor air supply system

本文阐明了下部送风房间热力分层和垂直温度分布规律，给出了确定垂直温度分布曲线的方法及确定最佳运风量的原理。为了计算冷负荷，作者初步推荐了不同位置热源的负荷系数，并且说明了如何决定送风口的型式与数量和相关数据。最后在实验基础上分析了地板空调的热感觉，其结果说明这种逆风系统在适宜的风量与温度下能够提供舒适条件，并使风感百分数低于１５％。

This paper demonstrates the thermal stratification and the vertical temperature distribution in a room with the underfloor air supply system,the way to describe and determine the pattern of the vertical temperature gradient and the principles for determining the optimum air flow rate.In order to calculate the cooling load,the author tentatively recommends the load factors for different locations of heat sources in a room with vertical displacement flow,also shows how to determine the type and number of floor outlets, and gives some correlation data.Finally,based on subjective experiments the thermal sensation with the underfloor air conditioning system(UFAC) is analysed,the results of which show clearly that this air supply system is capable of providing comfortable conditions for occupants under an appropriate air flow rate and temperature and that the percentage of draft feeling can be less than 15%.