ON POSSIBILITY OF APPLICATION OF LOW-STATIC TEMPERATURE OF GAS FLOWS IN JET DEVICES FOR GAS SEPARATION

In this article we consider and discuss a problem of achieving low-static temperatures of gas flows in adiabatic expansion of gas versus throttling of gas flows in case of a sudden pressure gradient, like, for example, during pressure reduction to 10 MPa in the low-temperature gas separators (LTS) and discuss calculation results obtained at three different gas flow regimes: transonic, sonic, and supersonic gas flow regimes with Mach number higher than 0.6. As situations of adiabatic expansion of gas due to a sudden unexpected pressure drop occur rather often in the industry, especially in narrowing parts of the gas transport system and cause significant deficiencies and outright harm in form of formation of icicles and hydrates, which subsequently further narrow the flow through the narrowing nozzles and similar equipment effectively blocking it. Alongside with that such damage can potentially pose corrosion hazard with subsequent failure of the equipment. This is especially relevant during gas separation and transporting. Furthermore, such motion causes significant alterations to the speed of sound registered around the narrowing nozzles, latches, control valves and such other devices. The results obtained in the calculations, that are nigh to impossible to obtain empirically, and basic parameters are representative of typical work modes of jet apparatuses used in gas separators when achieving low-static temperatures. Keywords: Pressure, temperature, velocity, adiabatic expansion, adiabatic cooling, gas flow.