Re: Re: Re: Re: Water Cooler for cab

Posted by Deas Plant. on March 28, 2003 at 22:33:32 from (210.50.57.74):

In Reply to: Re: Re: Re: Water Cooler for cab posted by todd on March 28, 2003 at 18:21:16:

Hi, Coaltrain.
I've been away from the farming scene down here in Australia for over 30 years now and there are probably a lot of things that have passed me by - maybe including the water coolers you speak of for tractor cabs. However, I have a small mains powered (240 volt here in Australia.) version, about 12 inches whichever way you measure it, that sits on the top shelf of my computer desk, uses about 1/2 a gallon of water in 4 hours, give or take a little and puts out a very pleasant cool breeze, thank you.
I can imagine that it would work quite well in a closed system like a tractor cab, although you would probably need something with a little more 'grunt' than this one on my desk. The biggest problem I can see with making one would be sealing the water tank from which the water is drawn up into the evaporation screen through which the air is blown to cool it. This one of mine has a separate water storage container with a valve built into the cap. You fill the container, put the valved cap on, turn it upside down and lower it into a slot in the top of the unit. When it gets down to the bottom of that slot, a peg in the base of the unit contacts the valve in the container and opens it. From that point, the water level in the tank below the evaporation screen is controlled by the amount of air that is let into the water storage container by the falling water level in the evaporation screen tank. It's a bit like a ball valve on a stock water trough. As the stock drink from the trough and the water level goes down, the ball valve opens and lets in enough water to bring it back up to the pre-set level. With this unit, evaporation removes water from the bottom tank which lowers the water level, which allows air into the water storage container, which allows water out to replenish the the bottom tank.
In the office here, I clean the screen about once very six months - takes about 2 minutes under the tap in the kitchen sink. I've had this one about 6 years now and it hasn't missed a beat.
I have no idea where or if such units would be obtainable for tractors, but I can't see why it wouldn't work if there was enough air flow and enough evaporative area - and you could stop water splashing out of that bottom tank as you drive over the odd bump or two. In a tractor cab, such a unit could be mounted somewhere inside the cab, which would make refilling the water container easier.
Just as a matter of interest, around 30 years ago, somebody came up with a similar sort of system to replace the carburettor in gasoline engines. The gasoline dribbled down from a top through/over a screen through which the intake air was drawn. Any excess/un-evaporated gasoline was collected in a second tank at the bottom of the unit and returned to the main fuel tank.

I'd be interested to hear how you get on with this one.

You have a wonderful day. Best wishes. Deas Plant.

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