指向型热辐射装置热性能试验研究

EXPERIMENTAL STUDY ON THE THERMAL PERFORMANCE OF DIRECTIONAL HEAT RADIATION DEVICE

为有效改善室内局部辐射热环境,设计了一种新型指向型热辐射(DHR)装置。从辐射装置对室内局部作用温度(LOT)的影响出发,通过试验验证了不同布置方式下DHR装置的指向热辐射的效果。结果表明DHR装置在不同布置方式下,自然对流对其的影响不可忽视。水平向下布置的DHR装置的铜管单位管长换热量最低,但指向热辐射效果最好,是水平向上布置时的2倍。为室内非均匀辐射热环境下改善局部辐射热环境提供了一种方法。

In order to effectively improve the local thermal environment in the room,a new Directional Heat Radiation(DHR)device was designed.Starting from the influence of the radiation device on the local operative temperature of the room,the effect of the directional heat radiation of the DHR device was verified experimentally.The experiment results showed that the influence of natural convection on DHR device in different arrangements cannot be ignored.The copper tube heat exchange per unit length of DHR device with level downward arrangement was the lowest,but the directional heat radiation effect was the best,which was twice as high as the level upward arrangement.This provides a method for improving the local radiant heat environment in a non-uniform radiant heat environment indoors.