高温环境下头部局部送风热舒适性模拟研究

Numerical Study on Thermal Comfort Characteristics of Local Air Supply of the Head in High Temperature Ambient

为了改善高温环境下人的热舒适状况,针对一种便携式空调系统中末端所采用的送风帽送风方式,采用CFD技术模拟计算分析了该送风方式下的降温特点以及送风参数对头部热舒适状态的影响特性,提出以热舒适满足率η作为头部热舒适状态的评价指标。计算结果表明:高温环境下该装置可有效改善头部热舒适状态。在40℃的环境中,适宜的送风温度为24～28℃,送风风速0.6～0.8 m/s,而送风角度对头部的热舒适状态影响相对较小。

To improve the thermal comfort state under the high temperature ambient, for the air supply method with the hat in a portable air conditioning system, the air temperature distribution characteristic and the effect of supply air parameters on the thermal comfort state of head are calculated and analyzed by the CFD technology, and the thermal comfortable meet rate r/is proposed to evaluate thermal comfort state of head. It is shown that the hat could improve thermal comfort state of head under the high temperature environment efficiently, and the appropriate temperature of air supply is among 24 to 28 ℃, the air speed is from 0.6 to 0.8 m/s, but the air supply angle has few effect on thermal comfort state in the circumstance at the temperature of 40 ℃.