Cutaneous burn at an elevated ambient air temperature

F. Chiang
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Abstract

The risk of cutaneous burn is usually assessed by comparing the temperatures measured at external surfaces when the equipment is operated as intended under ambient conditions specified by the manufacturer, with the thresholds established by experimental results in delicate laboratory environments. In the real world ambient air temperature varies with geographical location, the time of the year and so on, over which equipment manufacturers only have little control. It had been an industry practice that the user will be provided with information about the maximum recommended ambient air temperature at which the equipment can operate satisfactorily without compromising its functionality, operability as well as safety. An interest arose as to how these burn thresholds would be seamlessly applied to the real world hot surfaces. It has been the author's opinion that human body temperature is nearly independent of change in ambient air temperature while surface temperatures of any equipment, with or without thermal control, would generally depend on the ambient temperature, in other words, surface temperature will vary with ambient and yet the temperature difference between the surface and skin will vary, too. This paper will first discuss how human body regulates its temperature and then how higher ambient air temperature can weaken the ability of equipment to dissipate heat. The author's hypothesis will be demonstrated by several comparative tests at different ambient temperatures.
在升高的环境空气温度下皮肤烧伤
皮肤烧伤的风险通常是通过比较设备在制造商规定的环境条件下按预期操作时在外部表面测量的温度,以及在微妙的实验室环境中根据实验结果确定的阈值来评估的。在现实世界中,环境空气温度随地理位置、一年中的时间等而变化,设备制造商对此几乎没有控制能力。业内惯例是,向用户提供有关设备在不影响其功能、可操作性和安全性的情况下能够令人满意地运行的最高推荐环境空气温度的信息。人们对如何将这些燃烧阈值无缝地应用于现实世界的热表面产生了兴趣。作者认为,人体温度几乎与环境空气温度的变化无关,而任何设备的表面温度,无论是否有热控制,通常都取决于环境温度,换句话说,表面温度会随着环境的变化而变化,但表面和皮肤之间的温差也会变化。本文将首先讨论人体如何调节体温,然后讨论较高的环境空气温度如何削弱设备的散热能力。作者的假设将通过在不同环境温度下的几个比较试验来证明。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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