PC fan on 30 volts

[Gustav]

Thanks Brian,i get it now.

[glassdoctor]

Just a thought here... if you want to run two fans, you could just hook them up in series and they would each see 15V which would be perfect for a little voltage boost.

I have seen some pc cooling stuff that piggybacked two fans together... and I have thought of doing that just to get more airflow on my 12V fans.

[BrianG]

That is another solution as long as the voltage is 24v-30v. However if he wants something that will work with batteries below 24v (4s and 5s), then the regulator might be his best bet.

[Gustav]

I'm been toying with the idea of using the venturi effect and doing away with fans altogether,i'm trying to figure out what ratio between input and output area of the tube i would need to tripple the air speed.If i could get a 60mph wind blowing over the thing every time it goes 20mph then i don't think there'd be much need for a fan.

Might have to be more like double the air velocity so the OUT isn't too small or the IN too big to be practical.dunno haven't figured it out yet,there's online calculators for it though.

Drag might be a problem though,as might ripping the body clean off at 50mph:005:

The problem with just cutting holes in the body is it opens out after it enters and the air slows down so we're not really getting all that much cooling at these relatively slow speeds,i think maybe what we need is a tube or tubes going to the areas we want cooling.

Originally Posted by Gustav

The problem with just cutting holes in the body is it opens out after it enters and the air slows down so we're not really getting all that much cooling at these relatively slow speeds,i think maybe what we need is a tube or tubes going to the areas we want cooling.

Gustav, I recon a couple of ice cream cones through the windscreen could do the job.....they would have to be double scoop size obviously.....
That just leaves you to work out how much to bite off the end.......:004:

Ive always run my fans on 16-18 cells ( knowing sod all too :027: ) The one thing I am sure of now, is the neon ones seem to last consideably longer than the standard fans.......I plainly have no idea why this would be, just though id pass it on.

[Gustav]

Originally Posted by cabking

Gustav, I recon a couple of ice cream cones through the windscreen could do the job.....they would have to be double scoop size obviously.....
That just leaves you to work out how much to bite off the end.......:004

That sounds a bit technical,so far all i've got is a fairy liquid bottle jammed in the grill with a plastic pipe stuck to it,it's sure to catch on.

[BrianG]

Lol, sounds too complicated. Why not have a small tank of liquid Nitrogen? Or use a Peltier cooler?