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Nice example of recirculating coolant


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  #1  
Old 08-12-2014, 10:54:20 PM
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Photo Nice example of recirculating coolant

Randy really has a nice setup demonstrating how to circulate water without a pump..



http://youtu.be/DaJdP7BxtT0
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Old 08-13-2014, 09:29:26 AM
kwfiggatt kwfiggatt is offline
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Default Re: Nice example of recirculating coolant

OK, I give up - what makes it circulate? I see a check valve in there. This isn't standard thermosyphon, is it?

Kevin
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Old 08-13-2014, 11:22:15 AM
Bob Willman Bob Willman is offline
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Default Re: Nice example of recirculating coolant

Intake vacuum pulls water into the vertical pipe past a check valve. I think gravity then pulls water through the engine. I saw this the first time at Oblong. The engineer said that adjusting the valve that controls how much water enters the vertical pipe without sucking it into the engine intake valve was critical.

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Old 08-13-2014, 08:48:25 PM
con-rad con-rad is offline
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Default Re: Nice example of recirculating coolant

Interesting, though i'd imagine that a water pump or thermosyphon would be a little simpler.

in regards to sucking water in the intake... perhaps if there was a diaphragm between the intake vacuum and water? it would still pump the water but prevent hydrolocking...

conrad
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Old 08-14-2014, 08:49:20 PM
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Default Re: Nice example of recirculating coolant

The system uses 3 check valves, 1 in the line coming from the bottom of the cooling tank, this ck lets water be sucked from the cooling tank into the bottom of the engine's cooling system, but won't let the water go back in the bottom of the cooling tank. The second ck valve is in the verticle pipe coming up and out of the engine's cooling system. The engine's vacumn on the intake stroke draws the water from the cooling tank up thru the cooling system and up over the second check valve and up past the tee in the verticle pipe a foot or so. When the intake stroke is over the vacumn on the water is released and the water wants to seek its level in the cooling tank, it then runs thru the third check valve in the horizontal line and makes it's way back to the cooling tank. The key to this working correctly and not flooding the engine intake, is a little 1/2" plug valve that ties in to the top of the piping loop that ties the engine intake into the verticle coolant pipe, this little valve is the vacumn breaker for the system and allows the water to drain back to the coolant tank when the engine is not on the intake stroke.
This system is used on both of the working powers at Flatrock and both of the display powers at the Oblong show.
I hope that my explanation of this system are understandable, It is a wonderfully simple cooling system!

Randy

Last edited by tyrion; 08-15-2014 at 05:25:14 AM.
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Old 08-14-2014, 10:21:50 PM
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Photo Re: Nice example of recirculating coolant

Randy it was nice seeing you at Oblong! Thanks for bringing it..I was really impressed seeing the cooling system installed on your engine!!!
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Old 08-15-2014, 05:31:13 AM
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Default Re: Nice example of recirculating coolant

Thank you Fred for the great videos and pics you post! See you at the next show!
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Old 08-18-2014, 09:23:47 AM
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Default Re: Nice example of recirculating coolant

The same system is used of on some engines to pump fuel from a lower tank to the carb.
http://www.smokstak.com/forum/showthread.php?t=54562
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