Estudo do efeito joule-thomson em liberações gasosas para classificação de áreas de risco.

Abstract

In industrial plants where the handling of flammable substances is common, potentially explosive atmospheres can be formed, for this reason safety standards must be followed. In this case, the use of computational fluid dynamics (CFD) is important for more careful risk analysis. The IEC 60079-10-1: 2015 standard states that high pressure gas releases demonstrate the Joule-Thomson effect, while for hydrogen the reverse effect occurs. This study aims to use CFD to observe the influence of this effect. The results showed a slight reduction in the temperature profile for gases under real conditions. The analysis of the simulated cases at different pressures concluded that the temperature variation between gases hydrogen and methane in ideal and non-ideal conditions decreases as the storage pressure is reduced. The simulated cases with gravity effect demonstrated that the non-ideality of the gas has a small influence on the extension of the classified area. It was also possible to verify that the Joule-Thomson effect has no significant influence on high pressure gas releases.