3 replies to this topic

[go-fish]

Hello,

 

I am trying to estimate the ethylene flash gas generated by initial cooldown of an ethylene tank and associated piping.  Please could anyone advise on the approach.

 

The conceptual approach I have taken is to calculate the metal mass of the tank and the associated piping. Assume that the initial temperature of metal mass is 40 deg. C ( assumed average ambient temp. ) and the required final temperature is -104 deg. C. Assumed that the cooldown process is to completed in 24 hours. Based on this, I calculate the heat extraction rate ( mass x specific heat x delta temp / time (24 hrs)). I use the ethylene latent heat of vaporisation at a mean temperature of - 32 deg. C to calculate the vapour generation rate.

 

Thanks

[Bobby Strain]

The tank fabricator will probably do this for you.

 

Bobby

[go-fish]

The tank fabricator will probably do this for you.

 

Bobby

 

I need to do some preliminary calculations to estimate the BOG compressor requirements.

[Bobby Strain]

You will be the first to size BOG for cooldown. And if you really plan to do this it is even more important that you get information from the tank supplier.

 

Bobby