Cellar Inline extractor on 3a plug

[JohnD]

What happens if it is cold humid air as the converted cellar doesn't currently have heating but cellar kinda sits at around 16 degrees all year round?

Clouds of water vapour always rise above air. In cold weather and in hot. It isn't just heat that causes it.

 

[martygturner]

Clouds of water vapour always rise above air. In cold weather and in hot. It isn't just heat that causes it.

err thats not true... water vapour can rise or more specifically it has the ability to rise in say a close environment as it displaces the heavy nitrogen and oxygen molecules, its a weak force that depends on the air pressure of the environment...

Consider fog, fog occurs when there is a boundary layer , a thermocline, that traps a layer of low pressure colder air rich with water vapour beneath a high pressure warm air layer. Fog is not up in a cloud somewhere ...

In the case of the cellar it would make little or no difference where the extraction point was as the fan would easily overcome the rising force of the water vapour, any small air flow would over come that rising force as would differential heating of the space from ground contact eg cooling by evaporation.

Its more likely that the cellar has a colder bit ( ie a ring round the ground contact line or a wall at one end) which would induce its own convection current and therefore redistribute water vapour pretty evenly across the space. To not have that occur all the walls and floor and ceiling would all need to be the same temperature and have the same saturation level.

 

[endecotp]

Searching for “do gases separate by density?” will find much interesting discussion on Stack Exchange, Redit, etc.

 

[martygturner]

Searching for “do gases separate by density?” will find much interesting discussion on Stack Exchange, Redit, etc.

well done... gases mix all on their own due to the environmental factors at play or chaos as its best described.. we call this entropy, otherwise we would all be breathing Carbon Dioxide.