A question of thermodynamics

thinfourth · Post by **thinfourth** » Mon Mar 19, 2007 6:21 pm

MacK wrote:LNG = Liquified Natural Gas ?

It's more the temperature that the chemicals boil at rather than the temp they are stored at that is 'cold' Rich.

Unless of course you through in pressure into the equation which is very relevant considering we are talking about LPG and fridge plant

So temperature its stored at is basically correct when it comes to LNG which is stored slightly above atmospheric pressure

MacK · Post by **MacK** » Mon Mar 19, 2007 7:40 pm

thinfourth wrote:
MacK wrote:LNG = Liquified Natural Gas ?

It's more the temperature that the chemicals boil at rather than the temp they are stored at that is 'cold' Rich.
Unless of course you through in pressure into the equation which is very relevant considering we are talking about LPG and fridge plant

So temperature its stored at is basically correct when it comes to LNG which is stored slightly above atmospheric pressure

The pressure is irrelevant, to all intents and purposes, as long as the vessel it is stored in is able to contain the pressure, if the vessel is leakng then you will find frost/ice forming.

Certainly on refrigerant gases, I don't know enough about LPG and next to nothing about LNG, to comment on them.

Rich H · Post by **Rich H** » Mon Mar 19, 2007 8:17 pm

Can we just settle on cold?

robin · Post by **robin** » Mon Mar 19, 2007 10:01 pm

No one has mention adiabatic and isothermal processes yet - no discussion of thermodynamics is complete without a confusing foray into this aspect (which I never understand, before you start

).

Cheers,
Robin

alicrozier · Post by **alicrozier** » Mon Mar 19, 2007 10:05 pm

Just wait while I dig out 'Rodgers and Mayhew'

thinfourth · Post by **thinfourth** » Mon Mar 19, 2007 10:09 pm

I shall step out at this point and let the mekoins get to work

Still say drop the pressure and boiling point drops