Have Calor done a u-turn re smaller bottles?

[Alan de Enfield]

32 minutes ago, David Mack said:

Unlike transferring (say) water between two bottles, no air needs to transfer from the lower bottle to the upper. Since both bottles already contain gaseous lpg, there is no (significant quantity of) air in the system. As you pour liquid from the upper bottle the connecting pipe fills with liquid. The increased hydrostatic head of liquid raises the pressure slightly in the lower bottle, which causes some of the gas therein to condense. This reduces the volume causing more liquid to flow. At the same time the reduction in liquid volume in the upper bottle cause the pressure to reduce slightly, and some liquid vapourises to fill the space. Net result is an increase in liquid in the lower bottle and a reduction in the upper bottle. 

The phase changes will cause the lower bottle to get warmer and the upper bottle to cool. The rate this heat can be transferred into/out of the bottles will determine the rate of liquid transfer.

 

 

Which is why it is advantageous to the transfer to have the 'empty' cylinder as cold as possible, either stored in a freezer for very small cartridges, or in a bucket of cold water for bigger cylinders.

Edited December 31, 2023 by Alan de Enfield

[cuthound]

On 30/12/2023 at 10:28, rusty69 said:

I did. They are a right Palin in the arse

 

Palin, isn't he that bloke of the telly?

 

Are you taking the Michael?    

 

[magnetman]

Alms for an ex leper?

 

 

[MtB]

A social leopard?