论文部分内容阅读
酷暑难忍,人体热量极待散发。人与环境之间热交换方式有二:一是与周围空气及环境表面之间的辐射交换和对流传导;二是通过汗水和肺部呼出的水分蒸发而散发热量。一般说,气温较低时人体散热主要通过辐射和传导;气温较高时,则以蒸发热为主。 气温在30度左右时,不热不凉,不劳汗腺散热,无须衣衫保温。气温宜人。 33度,在这个温度中呆2～3小时。人体汗腺便开始动作;若出汗很
Unbearable heat, the body heat extremely distributed. There are two modes of heat exchange between man and the environment: one is radiation exchange and convection conduction with the surrounding air and the environment surface; the other is the heat dissipation through sweat and exhaled water from the lungs. In general, when the temperature is low, the human body radiates mainly by radiation and conduction; when the temperature is high, the heat is mainly evaporated. When the temperature is about 30 degrees, not hot or cold, no sweat glands heat, no clothes insulation. The temperature is pleasant. 33 degrees, stay in this temperature for 2 to 3 hours. Sweat glands begin to move human body; if sweat is