Department of Mechanical Engineering, Sejong University, Seoul 143-747, Republic of Korea.
J Hazard Mater. 2011 Jan 15;185(1):416-22. doi: 10.1016/j.jhazmat.2010.09.049. Epub 2010 Sep 22.
Auto-ignition of lubricating oil working in a compressor for an air conditioner is studied experimentally. The adopted lubricating oil is an unknown mixture with multi-components and known to have flash point temperature of 170 °C. First, its auto-ignition temperature is measured 365 °C at atmospheric pressure. The lubricating oil works under high-pressure condition up to 30 atm and it is heated and cooled down repeatedly. Accordingly, auto-ignition temperatures or flammable limits of lubricating oil are required at high pressures with respect to fire safety. Because there is not a standard test method for the purpose, a new ignition-test method is proposed in this study and thereby, auto-ignition temperatures are measured over the pressure range below 30 atm. The measured temperatures range from 215 °C to 255 °C and they strongly depend on pressure of gas mixture consisting of oil vapor, nitrogen, and oxygen. They are close to flash point temperature and the lubricating oil can be hazardous when it works for high-pressure operating condition and abundant air flows into a compressor.
对空调压缩机中工作的润滑油的自燃进行了实验研究。所采用的润滑油是一种多组分的未知混合物，已知其闪点温度为 170°C。首先，在大气压下测量其自燃温度为 365°C。润滑油在高达 30 大气压的高压下工作，并反复加热和冷却。因此，需要针对消防安全在高压下测量润滑油的自燃温度或可燃极限。由于没有为此目的的标准测试方法，因此本研究提出了一种新的点火测试方法，从而在低于 30 大气压的压力范围内测量了自燃温度。测量的温度范围从 215°C 到 255°C，它们强烈取决于由油蒸气、氮气和氧气组成的气体混合物的压力。它们接近于闪点温度，当润滑油在高压工作条件下运行并且大量空气流入压缩机时，它可能会带来危险。
