In rural Russia they used to us alcohol (wood type, not grain type, although I suppose that would work.) in the tractors. It was cheap and available. If it is legal to do where you are you could make a still and produce your own. Since you are not going to drink it you don't have to be to worried about it's purity.
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Ahem, Czechoslovakia had Tatras and wood burner cars too !
Liquefied gases have the biggest heat transfer potential.
I am guessing it doesn't freeze a lot where you are so why not water.
To develop anything you have to look at the cost benefits, the potential market and the skill set you have available to do the development. I get a feeling you may have ignored most of this.
All you need is pure water, e.g. destilled water.With that most of the corrosion causing things are already left out of the system.Next is to add some additives based on the type of motor, e.g. mainly steel or mainly aluminium.With that you want to prevent oxidation and corrosion - a good coolant in a healthy engine stays clean and clear for years.Last but not least something to prevent freezing of the water if the climate calls for the need.And as said in the other answers already for this the most common ingredient is Ethylene Glycol.Back in my young years our area did get some nasty temps of -20°C or lower.As it was dirt cheap I used pure antifreeze instead of the normal mix with water - don't do that!!!Turns out the stuff without the water performs very poorly as it does not take away the heat from the engine good enough.Similar problem on a much smaller engine by using hydryaulic oil - it performed well for the cooling but destroyed the rubber seals and gaskets quickly.If you really want to re-invent the wheel then try to find a cheap and organic alternative to Ethylene Glycol first.
Well, I think the Wikipedia article on "Antifreeze"
gives a good overview of the, uh, state of the art. You might wonder at the name.
Actually, I am wondering if any part of India experiences weather cold enough to freeze water? I've never been there.
Anyway, the usual stuff used for engine coolant, in my limited experience with car engines, is a, by-volume, mixture of 50% pure water, and %50 store bought antifreeze, and rumor has it (check the MSDS for more details) the store bought antifreeze is mostly ethylene glycol,
by weight, plus smaller amounts of corrosion inhibitors, plus green colored dye.
Anyway, the basic recipe here is, water, plus some other stuff to kind of improve its properties.
I think the idea with using a high boiling point alcohol, was to produce a mixture that is liquid over a wider range, than the usual range for water, i.e. 0 to 100 C.
Lowering the melting point, to less than 0 C, seems to work well.
Although, I am not so sure about what actually happens with the boiling point, the "anti boil" properties of the mixture. Part of what prevents the mixture from boiling is the fact that it is contained in a closed loop, that pressurizes itself, so that increase in pressure, by itself, increases the boiling point.
Yet, I kind of wonder what happens if you just put some engine coolant, in a beaker, on a hot plate? I am guessing, that when it boils, it is the lower boiling point component (i.e. the water) that boils first, and that maybe that could even be used as a method to separate one compound from the other; i.e. same as distillation.
The other thing I was going to mention, is there are other high-boiling alcohols, that are similar to ethylene glycol, like glycerol, and propylene glycol. The Wiki article for Antifreeze, mentions both of those.
Glycerol is a byproduct of the manufacture of soap, and also biodiesel, so maybe a factory that makes biodiesel or soap, could make engine coolant too?
I am pleased you are an Indian I had a good friend in Shaw but are you a special chemistry expert engineer ?
Bill Lear spent several years trying to develop an alternative to water for the Steam Bus but nothing had the benefits of a water based cooling... That means water based cooling outperformed all other cooling...
As a newbie you should look into the Best Answer and click it...