What do you guys use to get a live wireless flow measurement?
I need to have a live monitoring of the mass/volume flow of some CNG so that the caretaker can monitor the flow from internet.
It would be preferable to send signals with gprs and messure flow and temperature with a vortex device...
I have been given the task of making an installation expanding biogas(97% CH4) from 200 down to 4 bar.
Is it sufficient to calculate the temperature drop with the standard isentropic equation V1/V2=(P1/P2)^k-1/k?
I´m in doubt because I once heard that CNG(ca 94%CH4) drops approximately 1...
