Watercooling my Room

Hey :)

My flat gets pretty hot during the day and I want to find a solution to make it more bearable. Since I'm not allowed to get a Split-AC unit I came up with another idea.

I have a MoRa3 420 which I could hang on the wall and constantly feed with cold water from a faucet-bypass. The water from the line has ca. 13°C whilst my room (20m²) already reaches ~37°C, so there's quite a Delta. The fans on the MoRa would constantly run and push the hot air through the radiator, to cool it down.

Heating 1m³ of water by 5K takes about 5kWh of energy which could be extracted out of the room. Also I can just dump the warm water in the drain, so effectively routing the heat out of the flat.

1m³ of Water costs €1,37, so a heat capacity of ~5kWh (5K Delta) would be cheaper than 5kWh of electric energy that could be converted by a monoblock AC which would cost me €2,45 for the same amount of energy.

A monoblock AC as the issue of creating negative pressure inside a room, so it draws in warm air from the outside, whilst cooling it down, which makes such a system pretty inefficient.

Is this a feasible thing to try out? At the end if the day I only have limited knowledge, so I'd like to know what you think about this idea. :)