Mist Cooling System

[RWP]

Anyone build a misting cooling system for an eBike?
I want to set something up for my 8085/80100 motors.
Tell me about it or point me in the right direction.

THANKS,
Roy

 

[itchynackers]

I built one and it was functional. Never was able to get the motor hot enough to see if it would be effective.

Setup:
vented 9c motor
2 windshield washer nozzles (one on each side of motor),
connected to a 12v solenoid (powered by a small 3s lipo batt & simple toggle switch).
.windshield washer pump.
Water tank was a 100oz camelback.

The handlebar mounted switch opened the solenoid (to allow flow) and also activated the pump.

 

[Thud]

Give Etard a shout out....he has a mister on his current race bike.

 

[mdd0127]

If you use something like koolmist, you shouldn't have any rust issues. Also, if you enclose the motor and keep your coolant in the bottom of the enclosure, the coolant will condense back down and can be recycled.
http://www.koolmist.com/

 

[RWP]

Thanks guys - really appreciate your suggestions.

Here is what I have been thinking about:
micro garden, 90 degree mister with flow rate control valve
.25" plastic hose
12-16 oz SS water bottle

Drill a hole in water bottle for tire valve
Drill a hole in water bottle with connector to .25" hose
Spring steel small diameter hose clamps from auto parts store

Fill the bottle about half to 2/3 and pump in some air to about 30#'s.
I would like to find an additive to mix with the water to minimize rust.

That's the plan - what do you think?

 

[crossbreak]

Fill the bottle about half to 2/3 and pump in some air to about 30#'s.
I would like to find an additive to mix with the water to minimize rust.

sounds like a great plan to figure out how much heat the system may cool away. For a closed system a good radiator/condenser and pump would be needed. also the system would have to be steam tight. that changes requirements on seals etc. , the system might get bulky i'm afraid :?

anti-freeze additive for automotive use has also anti-rust abilities.

 

[RWP]

Fill the bottle about half to 2/3 and pump in some air to about 30#'s.
I would like to find an additive to mix with the water to minimize rust.

sounds like a great plan to figure out how much heat the system may cool away. For a closed system a good radiator/condenser and pump would be needed. also the system would have to be steam tight. that changes requirements on seals etc. , the system might get bulky i'm afraid :?
anti-freeze additive for automotive use has also anti-rust abilities.

Thanks crossbreak,
I think for this motor an enclosed system is out of the question for me. I did buy a 3" ABS pipe and am working on figuring out how to assemble the bits I have. Come to Riverside on the 15th to see how it works! :lol:

 

[JEB]

I think the coolmist (used as a cutting tool lube/coolant in machining) is a better idea than anti-freeze, there should be much less of a dry residue left on the motor surface, also used distilled water, no rock deposit. Jim

 

[Danny Mayes]

Hey RWP,

I have been thinking about a very similar set up. The pressurized bottle is a great idea. Light weight and simple.

I am not sure how much of an issue rust will be. What in an 80/100 can rust? I think the bearings are the only thing. And the saft i guess. The bearings should be mostly covered in grease anyway... I'm guessing the motor heat will vaporize all the water if it is set up right anyway. My plan is to use straight water and if rust becomes an issue for the bearings, replace them with ceramics.

Using distilled water is a good suggestion tho. I think I will just use filtered water...

What thoughts are u having re a solenoid for triggering it. Also any thoughts re having it be automatic??? I have a temp sensor from HK that has a programmable alarm that sets off LEDs. Had thoughts of wiring a relay to the led output with a little delay circuit triggering the solenoid...

D

 

[RWP]

Hey RWP,
I have been thinking about a very similar set up. The pressurized bottle is a great idea. Light weight and simple.

Thanks.

I am not sure how much of an issue rust will be. What in an 80/100 can rust? I think the bearings are the only thing. And the saft i guess. The bearings should be mostly covered in grease anyway... I'm guessing the motor heat will vaporize all the water if it is set up right anyway. My plan is to use straight water and if rust becomes an issue for the bearings, replace them with ceramics.

What about using sealed bearings instead of shielded ones?

What thoughts are u having re a solenoid for triggering it. Also any thoughts re having it be automatic??? I have a temp sensor from HK that has a programmable alarm that sets off LEDs. Had thoughts of wiring a relay to the led output with a little delay circuit triggering the solenoid...

I have not thought about controlling the mister. Just turning it on before a race and hoping there is enough water volume and air pressure to last a race, but, I like your idea. I think have the same HK devise you mention.

Some pictures of work in progress. I am going to mount the cylinder to the seat post with zip ties.

 

[Danny Mayes]

Looks cool. Hope it works out for you.

Yeah sealed bearings I guess would work. I dont know how they go with the heat??

Are u not going to fire the water through the motor onto the windings? Looks like you are set to cool the can???

D

 

[Thud]

At the risk of infringing Etards IP here is a link to his bottle mister;
http://www.ebay.com/itm/10oz-Blue-Personal-Mister-Portable-Water-Mister-Spray-Cool-Blaster-Misty-Mate-/140826676220?pt=LH_DefaultDomain_0&hash=item20c9ec8bfc

I put a fan on his motor to draw air/mist through it & i was dumbfounded at how cool his motor was after blowing off the gassers in the 1st heat race...huge holeshot, pulled to a good lead (helped with a big crash heading onto the long straight after Etard got through). came in & i could lay my hand on it....while all my 80-85's lay in a smoking heap of carnage....the HV160 delivers way too much power to reliably race an rc motor on the track.....

We will build on etards success & find him a battery sponcer....he had 6 different packs to make his race pack...& they are all puffed like an angry porcupine fish!

 

[Danny Mayes]

Lol, that is too funny "misty mate"!

Funny also in the sense that for 20 bones you can buy a highly effective RC cooling system that is ready to go... Race proven even

D

 

[kfong]

I had suggested that very cooler in one of my early post, even posted a picture describing it. Good to see it being as effective as I envisioned. The discussion had to deal with the heat soak up pikes peak.
http://www.endless-sphere.com/forums/viewtopic.php?f=3&t=27328&p=396628&hilit=Mist+cooling#p396628

 

[Danny Mayes]

You da man Mr Fong, tis a great suggestion!