Tales from a Ventilation Lunatic

[sternwake]

I've still not investigated the NON OP 120mm Delta FFB1212EHE on my 3 fan intake shroud, though I still suspect the V bucker rather than fan failure itself.

Been making a lot of dust, and removed the charcoal filters off my 92mm clamp fans for vacuuming and then washing, but left them off for a while. The amount of dust which built up on their blades and the amount of dust on surfaces without their filtration, was very noticeably increased without them, and again reduced significantly when I put them back on.

Some Caig F5 Faderlubed Potentiometers are obviously requiring another dosage.

[sternwake]

Saw the van for the first time in several weeks yesterday.

Pulled the 3 fan shroud, and  today, investigated the NONOP Delta ffb1212EHE.
V Bucker  getting power, and its output responds nicely to potentiometer through full range.

So, failed fan.

Couldn't see/smell any failure with impeller removed, but other side of circuit board is  invisible, without the application of hub breaking leverage, so out comes the proper tool.

There is an open area of the hub. I assume for circuit board component ventilation, as the wire entry is nearby.
I have taped this area off on some other Delta fans, and covered the tape with amazing goop, and none of those ffb1212ehe's have failed...yet.

The area of hidden side of the circuit board, adjacent to this open area of the hub, and only this area, was all green with powdery corrosion, and the CB traces appeared expanded in this immediate area.  I had amazing gooped the wire entry, but these solder joints on this side of the CB I cant reach without destroying fan, also appeared somewhat oxidized.

Heres the area after an alcohol soaked swab went at the area.
   

I had used clear nail polish on the side of the Cb I could reach, and that looked pristine, and AG'd the wire entry and could see nice clean solder joints through it.

So basically i am closing off this opening in the hub on all fans with it.  Any opening is basically allowing the fan itself to push high pressure  humidity and salt laden air into it.  I don't think overheating components is an issue, or it has not yet been so with other fans whose potential ventilation I have completely blocked off.

I am making a 140mmx52mm 24V  Delta gooseneck'd  clamp fan. Mother of all Clamp Fans.

years ago I bought 4 92mmx20mm Antec fans but never put them to work. Each has a 3 speed switch.
4 of these ziptied together side by side, fit perfectly inside 14.5 inch wide return HVAC return duct in my room.

Friction fit, no gaps, meant to be.

I slid the  four 3 speed switches out the grill and power them with a netgear 120vac to 12vdc 3 amp rated power supply which is plugged into a power strip, that I can turn on and off with my toe.

These 4 fans together on max speed is about 140CFM, and with room door closed they suck much more air from the ceiling feed vent from central Air, and i can make it the coldest room in the house, where without them it is the hottest, bordering intolerable.

All sorts of HVAC ducting improvements possible in parents home  I've only addressed a fraction of them so far.  The original HVAC designer didnt care, and neither did the installers.  Id say 10 to 15% of conditioned air reaching each ceiling output vent, was able to leak into attic, and the same with the return vents, some of which are able to suck in attic air.

The 120mm Jaro fan with rotating grille, is getting lots of use. as a tabletop  or floor fan in the 85 degree garage.
I have the 140MM BDS Time fan as a tabletop fan, but can be positioned on floor too.  Sends a nice column of high speed air wherever aimed.  This fan does not slow down as much as I'd like, but not an issue in this task.

But the Delta 24v 140mm  fan has way more power and can be dialed down to low and slow and quiet, so it will be getting the clamp and adjustable gooseseck, because it is only April and already way too hot, and I've never been described as having a swimmers build.

The 12v 140x36mm fake Delta fan is exhausting the garage/workshop, alongside a  gifted 120mm 120vac fan @ ~ 80CFM.  I made a huge shroud to tightly fit the attic opening in garage, and could fit many more fans in it, but the two suffice, so far.

[rvpopeye]

Fan on , fan off........

[sternwake]

spinning Thoughts for the mind's impeller, as my latest ffb1212ehe is en route.

I was able to spend 2 nights away, and brought my own 22Ah 12v AGM UB12220 battery and my 92mm delta 175cfm clamp fan, more for the white noise when trying to sleep ( tinnitus) than body temperature control, but I am very used to a directed stream of air blowing over my bed at a minimum, as well.

I didn't bring an inline wattmeter to check battery consumption, but after 2 nights at 8 or so hours of fan runtime each, the battery read 12.77v when I plugged it in to charge. It normally rests at above 13v for a week, after being fully charged.

I should have seen how many AH it took to return it to full, but .....

Carrying a 14Lb battery 22 Ah 12v AGM battery was way overkill, but I slept well enough in a foreign room/bed.

In another thread I posted how I Committed to the Ridgid 18v battery cordless tool system, vs Dewalt or Makita or Milwaukee. Mostly as Ridgid will replace failed registered batteries, and their batteries can be obtained occassionally, for significantly cheaper than the other brands.

I got the brushed drill/driver with charger and 2 2.0Ah battery kit at first,
then the 4.5 inch angle grinder with 2 4.0Ah batteries and charger kit.
https://vandwellerforum.com/thread-4497.html

I ran across this adapter for the batteries.



I imagine a 92mm delta fan attached to this adapter plate with a xl4015 based 5 amp Vbucker speed controller, one with a current limiter, which I can use to prevent 20+ Ridgid battery volts reaching the fan's circuit board.
I can use the current limiting potentiometer to limit the max speed, so even if I crank the potentiometer all the way up, it will not deliver the ridgid battery's 17.2v to nearly 21v range to the circuit board of the fan, potentially frying it.

I've fed 15v to 12v Delta fans without issue, but there's little to no point in going above 12.0v as they are so powerful that I rarely feed them that electrical pressure anyway.

Basically the 92mm 175cfm fan at high rpm, is so loud, it is unusable for any significant duration. I only tend to crank it to max after showering and helping to dry completely, that which the towel did not. It's on 24/7, but at near its slowest speed where it can barely be heard usually in the 0.8 to 0.15 amp / 4.2 to 5.5v range, IIRC.

There have been times when Fiona wants to go for a walk, badly, near noon.
The hotter days I'll wet her down before we head out, and she acts like a sled dog until she's nearly dry, then we bounce from shady spot to shady spot on the return. I carry water to wet her back down and allow her to drink, but the days without a breeze are tough and she will not stand up until ready.

The Ridgid battery powered Delta fan, will fit in my cargo short's side pocket. Crank it to 15v, Aim at dampened fur.

Fans everywhere.

[rvpopeye]

I'm a fan of your fans !

[sternwake]

Delete

[sternwake]

Test
2.0Ah 18v Ridgid battery feeding a wattmeter, then a buck boost converter feeding another wattmeter, feeding a voltage bucker feeding a 120mm Jar0 fan.
   

   

Melted some solder into factory crimps
Heatshrinked.

Ran out of 10-12 flag terminals, so no fuse on 12awg output, yet.

[rvpopeye]

On consideration of all past and current experimentation ....
I hereby re-adjust and bestow the "Official Title" of "The Ventilation Wizard""
(the lunatic part was not quite accurate , at least from my POV.)
Glad to have you part of the YARC team TVW !

T W O h s...P.O.

[sternwake]

   

This is the hardened MOAF. 
Soon-to-be be the clampMOAF.
Still designing the gooseneck attachment/converter/potentiometer location.

Blue tape cut to fit ipa swabbed interior of  hub, bridging the corrosion failure  inducing gap.

Tried some e6000, instead of amazing goop. Better dispenser, a little.less.viscous.

Loose wires attached to hub support steering  vane.

2 layers of.clear nail polish on accessible side  of circuit board.

New ffb1212ehe had plastic rotor  lock instead of metal E clip. Past tense.
It.got same.tape e6000 nail polish treatment.

I think the Ridgid powered  cargoshort pocketfan will get a pair of bucked  50mm screaming Deltas.

[sternwake]

Fired up a 60mm delta, and dual 50mm deltas through large buckboost,, though the 5 amp cc cv buckers arrived.

They are too loud, annoying pitch,.and not enough raw air throwing power, even when fed 16v.
Slowed way down for white noise, pitch tolerable, but airflow lacking.

Ordered 92mm 175 cfm delta.
Might have to be Ridgid battery in one cargo pocket, fan in another, join with velcro.
Join APPs.
Feed it upto ~15v,
Aim.
Aahhhhhh