Natural gas expansion
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Has anyone ever done this: transporting natural gas at reduced pressure after expansion heat exchange, with partial liquefaction?
Partial liquefaction – it’s a bit complicated.
To be honest, I didn’t understand the question. Do you mean that the gas coming in needs to be expanded and then transported at reduced pressure, and that part of the gas also needs to be liquefied? These are two different processes; it’s not easy to implement them.
Eddy current tubes can be used, but they are relatively complex and their parameters are difficult to determine； For a throttle valve, a large pressure drop is required.
It should first involve heat exchange between the hot and cold streams; after that, the stream undergoing heat exchange is separated into gas and liquid phases. The gaseous phase is then expanded for refrigeration, followed by the separation of the condensed liquid – and this is what is referred to as the cold stream mentioned at the beginning.
What we produce are vaporizers of the air-temperature type; the substance is turned into a gaseous state first, and then its pressure is adjusted for use.