How to size a Vapor Recovery Unit

[elquesifilma]

I need help in sizing a Vapor Recovery Unit. Basically i need to calculate total release volume to size the compressor and scrubber.

How can i estimate the total losses (flashing/working and breathing losses)? do i need to calculate all 3 to size a VRU for that capacity?

We have a tank battery which seperates oil , gas and water. The Oil is separated at a free water knockout at a pressure of 40 psig and the oil is sent to atmospheric tank ( with blanket gas).

We have 2 oil tanks. I know the sizes of the tank and the barrels of oil perday. Another consideration is that this is a CO2 flood so the composition of the VAPOR is likely high in CO2

Any help or guidelines would be greatly appreciated.

 

[dcasto]

1, Just go out and measure it.
2. Set up a simulation based on gas and lquid sample
3. guess small