等温热环境中紊动气流对人体热感觉的影响  

Effect of turbulent intensity on human thermal sensation in isothermal environment

作　　者：夏一哉[1] 赵荣义[1] 牛建磊[2] 

机构地区：[1]清华大学热能工程系,北京100084 [2]香港理工大学屋宇设备工程学系

出　　处：《清华大学学报（自然科学版）》2000年第10期100-103,共4页Journal of Tsinghua University(Science and Technology)

基　　金：香港理工大学资助项目!(G- S872 )

摘　　要：流动的空气可以在较热的环境中大大改善人体的热感觉 ,但同时也会引起不愉快的吹风感。该文通过考察在气流脉动强度为 2 5 %和 40 % ,相对湿度为 35 %和 6 5 % ,空气温度在 2 6～ 30 .5℃范围内变化的等温环境中人体对风速的选择 ,研究了紊动气流对人体热感觉的影响。受试者在气候室中选择令他们满意的风速 ,并回答有关热舒适和吹风感的问卷。通过对实验数据的总结分析 ,发现高气流脉动强度可以改善中性 -热状态下人体的热感觉并减少吹风感的产生 ;将吹风感的概念加以推广 ,提出了一个预测等温较热环境中产生吹风感机率的数学模型。Air movement can improve thermal comfort in “warm” conditions, but it can also cause uncomfortable drafts feelings. This study focuses on the effects of turbulent air on human thermal sensations by investigating the preferred air velocity within the temperature range of 26℃ to 30.5℃ at two relative humidities of 35% and 65% and two turbulent intensities of 25% and 40%. Subjects in an environmental chamber were allowed to adjust air movement as they pleased while answering a series of questions about their thermal comfort and draft sensation. The results, showed that the higher turbulent intensity can improve human thermal sensations and reduce the risk of feeling a draft in a warm isothermal environment. The concept of draft is expanded and a new P DV model is presented to predict the percentage of people feeling drafts in warm isothermal conditions.

关 键 词：等温热环境 紊动气流 人体热感觉 

分 类 号：TU831.1[建筑科学—供热、供燃气、通风及空调工程] TU834.3