room air cooler

Put a block of ice in the corner.

Bury it.

i cant understand.

Rooms that are underground are thermally more stable.

I was in a house once that had been built above an underground cave. They ran a large vent from the cave (about 55°F) up to the house, which was also stone so that it had a lot of thermal inertia. The house was quite comfortable. I've also seen houses set about 2/3 into the ground - sort of like the old sod houses on the US prairies - that were cooler in the summer and warmer in the winter.

A GA fer ya!

The best you acn achieve is the same temperature as your outdoor air. In which case you need to leave the door to room open and have high level windows in the room so that you are able to create a natural draught. Hot air will rise and escape through the windows while cool outdoor air will enter from the door.

What about evaporative cooling? If the air can be connected to evaporating water, then it will achieve the wet-buld temperature, which is less than or equal to the dry bulb temperature.

http://en.wikipedia.org/wiki/Evaporative_cooling#Evaporative_cooling

Water is about the most natural stuff one can find...

Install a roof top garden. The natural process of evapotranspiration will cool the area immediately under the roof, resulting in natural convection currents being created within the house.

Dear Mr.Shankar.N,

Use a DESERT COOLER - where a small fan will blow air in to the room, which will be made to pass through a wetted porous mat (wetting is achieved by allowing water to flow over the mat from top - a small pump is required for this) in to the room.

The LOWER THE RELATIVE HUMIDITY, HIGHER WILL BE THE COOLING EFFECT - the air gets saturated while passing through the wet mat, and in this process each Kg. of Water will remove 540 K.Calories of Heat from the air, thus cooling is achieved.

This COOLING EFFECT is achieved as long as RELATIVE HUMIDITY in the out side air is very less, which is to be blown through the cooler. If by chance, rain is experienced - the RELATIVE HUMIDITY will shoot up and out side air gets saturated and cooling effect will not be there.

The principle involved in this COOLIING SYSTEM is EVAPORATIVE COOLING, covered in the THERMO DYNAMICS.

Thanks.

DHAYANANDHAN.S