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在海洋科学考察与海洋资源开发的潜水作业中,通常都采用以氦气为主要成分的氦氮氧混合气(以下简称氦混合气)做深潜的呼吸气。氦的热力学性质与空气的有很大差别。氦气的导热系数为空气的五倍多,因此潜水员对氦混合气环境的温度和湿度都极为敏感;氦气的质量比热约为空气的六倍,适用于空气的湿度计算式及干湿球温度与相对湿度的对照表不能用于氦混合气。显然,精确测定并计算氦混合气的湿度,对推动潜水科学
In marine scientific expeditions and submarine operations for the development of marine resources, helium-nitrox (helium-nitrogen) mixture (helium-air mixture), which has helium as its main component, is usually used for deep-dive breathing. The thermodynamic properties of helium and air are very different. Helium has a thermal conductivity of more than five times that of air, so divers are extremely sensitive to the temperature and humidity of the helium mixture; the mass specific heat of helium is about six times that of air, making it suitable for the calculation of air humidity and wet and dry The table of ball temperature and relative humidity can not be used for helium gas mixtures. Obviously, the exact determination and calculation of the helium gas mixture humidity, to promote diving science