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对高海拔地区降低燃气器具输入率的传统理解是:“随着海拔的升高,空气变得越来越稀薄。因此,空气中可以为可燃气体燃烧提供的氧气也越来越少。”海拔每升高一千英尺,空气密度就要下降4个百分点,因此,高海拔地区燃气器具的输入率也要下降相同的量。本文深入研究了高海拔地区燃气器具的运行问题,发现:①在高海拔地区,可燃气体密度的减少量会补偿大气密度的减少量。②高海拔地区,由于可燃气体密度的下降导致可燃气体以较高速度通过进气孔,这是修正输入率的直接原因。③高海拔地区燃气器具运行的基本原理是柏努利方程。它将推导出同样的结论———高海拔地区燃气的输入率也必定是海拔每升高1000英尺输入率下降4%。
The traditional understanding of lowering the input rate of gas appliances to high altitudes is that “as the altitude increases, the air gets thinner and thinner, so the amount of oxygen in the air that can be used to burn a combustible gas is less.” Altitude For every 1,000 feet raised, the air density will have to drop by 4 percentage points. Therefore, the input rate of gas appliances in high altitude areas will also decrease by the same amount. This paper studies in depth the operation of gas appliances in high altitude areas and finds that: ① At high altitudes, the reduction of combustible gas density compensates for the reduction of atmospheric density. ② At high altitudes, the combustible gas passes through the air intake holes at a higher velocity due to the decrease of the density of the combustible gas, which is the direct reason for correcting the input rate. ③ The basic principle of running high-altitude gas appliances is the Bernoulli equation. It will deduce the same conclusion - the input rate of gas at high altitudes must also be 4% lower for every 1,000 feet above sea level.