Author Topic: Evaporative cooling question  (Read 163 times)

veggie

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Evaporative cooling question
« on: August 29, 2022, 08:25:27 PM »
On my latest project I was thinking of using and evaporative water tank for engine cooling. Just like the original Listers.
That project can be seen here ... https://listerengine.com/smf/index.php?topic=9572.msg109839#msg109839

While they do take a long time to heat up, once near boiling they keep the engine at the optimal operating temperature.
And warm up time can be controlled by the size of the tank.
I will most likely use a pump for circulation rather than rely on thermosyphon, although that simplicity appeals to me also.
My question to all those who use an evaporation tank:...

Do you mix glycol to the water in your systems ?
And if so, does the glycol boil off with the water or does the mixture get slightly more concentrated as steam leaves the system?
« Last Edit: August 31, 2022, 08:54:20 PM by veggie »
- 6/1 GM90 Listeroid - Delco 33si Alternator
- Changfa R175 - Lease/Neville Alternator
- JiangDong R165 Air cooled - 2 kw

32 coupe

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Re: Evaporative cooling question
« Reply #1 on: August 29, 2022, 09:48:58 PM »

When I used thermosyphon on my twin I had thermostats on the water out manifolds.
I placed the bottom of the tank level with the return line to the engine.

A pump will not allow real thermosyphon action.  It may work better in your application though.

I can't answer the glycol question but I would think the water would evaporate leaving the glycol
behind.

Metro 6/1 turning a ST 7.5 KW gen head
Changfa 1115 turning a ST 15 KW gen head
Ashwamegh 2/25
John Deere 110 TBL
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32 coupe

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Re: Evaporative cooling question
« Reply #2 on: August 29, 2022, 09:56:59 PM »

I did want to add that I have had great success with the after market "race" Honda radiators.
Usually about $100 or less on ebay with an included fan.
I have found on my projects that a 12" fan won't cool nearly as well as the 14" version.

I would put a thermostat on your project. Quicker warm up times amd more consistant running temps.

Good looking project !

Metro 6/1 turning a ST 7.5 KW gen head
Changfa 1115 turning a ST 15 KW gen head
Ashwamegh 2/25
John Deere 110 TBL
New Holland TC 30

"I was sitting here reading this thinking what an idiot you are until I realized it was one of my earlier posts !"

veggie

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Re: Evaporative cooling question
« Reply #3 on: August 30, 2022, 03:15:32 AM »
32coupe,

Thanks for the feedback. I will see how I can fit a thermostat into the system.
- 6/1 GM90 Listeroid - Delco 33si Alternator
- Changfa R175 - Lease/Neville Alternator
- JiangDong R165 Air cooled - 2 kw