Tales from a Ventilation Lunatic

[rvpopeye]

What makes you think they do get things done ?
Unless....they hire somebody to do it counts...

[Blacktank]

i'm coming for the crown

[rvpopeye]

Gold luck BT ,he's got quite a big head start on ya.!..

[Blacktank]

Gold luck BT ,he's got quite a big head start on ya.!..

i still have a computer fan in the drawer and giant ass windows

[sternwake]

Fans in windows without shrouds, are a tiny percent as effective as those with shrouds.

Your brushed fan motors with antiquated impeller blade designs, make me puke with revulsion and disgust verging on violent bowel evacuating levels of outrage....



J/K any fan is better than no fan.

Your SS fm121. move the fingerguarde/grille 1/8" or more from fan body. Noise down/ airflow up. Only tiny persistent logic free fingers could fall prey to the greater clearances.

Next time you strip some 10AWG or thicker wire , save the round column strippings to get that 1/8" inch + diameter extra distance between grille and impeller..... might need some longer self tapping screws of correct diameter though.

Helpful hint of the day.
Soon to become one Of Popeyes daily updated threads.

[rvpopeye]

A massive effort by the old guy proved not quite enough to win the day......
Nice try , no cigar.
Round one goes to the reigning champ.

Thx for the chuckle guys.

[Blacktank]

he's just jealous that his are measured in millimeters and mine are man sized 10-12 inches

with them all on high it's probably 15 amp draw or something crazy

[sternwake]

Heck my Hvac blower alone, which I can use without key in ignition/engine running, at any speed,
can draw 15 amps at max.

All my other fans on high speeds could draw nearly that much too, and its freaking awesome to have that much power to tap.

But yea, I wish my roof vent aperture were larger, for a larger fan, but not if it had some nostalgic cheapass brushed motor with shitty impeller design.

[sternwake]

The guy who owns the boat I've been working on, had a wine fridge in his kitchen. It did not work. but it had two 60Mm fans. Those 60x10mm ball bearing fans are now behind my fridge, exhausting, even now that the heat wave is over.

Lots of other parts holding the wine fridge together are in my spare screw bins, and I kept the nice glass door with its wide seals, and glass shelves a bunch of nice molex connectors.

Tonight I realized my internal to fridge fan40mm x 15mm has failed, put into service in october 2012 and running almost 24/7/365 since, it owes me nothing. At that time I searched long and hard for a low CFM low as possible amp draw fan. Low amp draw as the fan itself adds some heat the cooling unit must then remove, so it adds to the heat load.

Low CFM as the fridge is only 1.8 cubic feet. Don't need huge cfm in such an application.

Anyway I thought the fan I used was discontinued and Sunon's own site was not showing it. I looked around, found a Delta fan with 2x the amp draw and about the same CFM, but then pulled the failed sunon fan out and searched its part number.

Blow and lehold plenty of E bay hits. One out of California, the rest from China. Same price including shipping. I bought two, for ~12$. I think I paid much more for it in 2012.

SUNON KDE1204PKV3-A
0.03 amps@12vdc

I was considering a 24v fan which claimed to start at 7v and drew 0.06 amps at 24v. BDS time. I have one of their 140 mm fans. Its guts are not as impressive as Delta fans. Almost.....but no cigar

Glad I found the Sunon Maglev, since I know it works well and can last 8 years running continuously

[sternwake]

Tuesday night, @ M&D's stick and brick, the garbage and recycling goes out.  While I tell my old man I'll take it all  out before I go to bed, many hours in future, habits.........

So I'm in the Den, rewatching that Black Mirror episode where everybody up votes or down votes each other via smartphone as to their societal worth, in some attempted parody of what no longer is, when I smell something burning.

I get up go to the kitchen, and plenty of rancid smoke is spewing from stove top.  My Old man had picked up the recycling bin, and had placed it half on the counter half on the inductive stove, Which would not be an issue, but he also inadvertently turned on one of the burners in the process.

When I got there, there was just white smoking plastic on the stove, Source removed, but a   Horrendous stink. 

 Dad was still in the process of taking out the garbage and recycling.  My mom, logic circuits fried with dementia, is trying to help but just in the way.

Fiona, is just staring at the shitshow, wondering who is going to throw her ball, and when and why the humans are freaking out..

The smell is overwhelming. I command mom, and Fiona to get out of the kitchen.  Fiona listens, but the other,  That's like pushing a bowling ball up a hill with a string, so I go and open the sliding glass doors, and turn the ceiling fans on high, and get all the 120vac portable fans, which not surprisingly, are in the spare bedroom, were I sleep as they like it 78 Fucking degrees in the house.

These two small pitiful fans are jokes in comparison to my Delta fans, but better than nothing. 

I establish what is the natural cross ventilation, and place the small gutless 120vac fan to assist on the exhaust side of the sliding glass doors.  I goto the main HVAC control and turn everything off.

I then goto the van and get some proper tools to lift melted yet still burning and smoking plastic from induction stove glass surface.

Then I goto back to the van, and pull out the 18Ah mightmax battery and the 92mm delta clamp fan and clamp it to the one sliding glass door up top, mate the 45 amp APP's and crank it to high, then pull off the filter sock on its backside and let er rip forcing fresh air inside.

That fvcker is like an air cannon, but its only a 92mm fan. My other easy to grab fans are my acrylic passenger window fan shroud, two 120mm deltas, but blowing in opposite directions.  I grab it anyway, and close it in sliding glass door, plug it into the other 45 amp APP and put the intake fan on high and the exhaust fan on minimum.


I have my 3 fan intake fan shroud with a Papst the 140MM x52mm  24vdelta mother of all fans, and another 120mm Delta.   Remove Two screws and one APP place in sliding glass door aperture and I could quadruple the air exchange, but it is unnecessary.

The 92 and 120mm Deltas on high speeds, assisting what might be a 3mph wind outside, and the 120VAC fan on the floor exhausting on the other end of the house, cause an impressive amount of air to flow. 
 The smoke was quickly cleared, the burnt plastic stink is taking a bit longer as the ceilings are high.

The nice thing, is it is 67f outside, and the house is now down to 71 from 77f, and I am finally comfortable, temperature wise, inside.

The 18Ah mightmax AGM battery, needs a good deep cycle and relatively high amp recharge anyway.

The dang fans on such high speeds are dang loud. I could not easily  achieve a shroud for perfect positive air displacement, more relying on the sheer velocity of high rpm fans assisting the natural cross ventilation between sliding glass doors.

One might think Fiona, with super sheepdog hearing and  Polish sheepdog memory, might choose the furthest distance possible from them, instead chooses to be 5 feet away, in their airflow.  She loves it cold.

-------

I turned my fridge back on a few days ago, My Main G31 Northstar TPPl AGM battery has only been powering some fans on low overnight since arrival and Solar has been doing its thing.   Very Shallow cycles for ~7 weeks now, rarley driven

I notice not only My Northstar TPPL AGM, but these cheap chinese AGM batteries, do not perform well when asked to power a load for longer, when they have just been only  shallowly cycled, or stored fully charged with a top charge every two weeks, or just maintained at the right float voltage.

I ran my TPPL down a bit today when packing and loading the fridge with warm foodstuffs and cranking fans and stereo. 
 The 18Ah mightmax is powering ~ 3.5 amps of high speed fan load for a few hours now.  So  I plugged the Van in.  

The TPPL AGM  down 12 Amp hours is gobbling up the amps, yet the battery monitor now  says it is only 2 or 3 from full.  If it were indeed 2 or 3 AH from full it would not still  be accepting 15+ amps.  Yet today, midday, I witnessed the solar holding the battery at 14.7v while amps into battery tapered to 0.4v, which ihave programmed as the float voltage trigger.  This is the 'benchmark' for establishing full charge, and a 'self rezeroing' point for my battery monitor.

But judging by how much amperage it is accepting when hooked to a 40 amp charging source seeking to hold 14.7v when just 12ah from full.  I am noticing it is a much hungrier battery.

They say lead acid batteries have no memory.

But, 

I think they get lazy when cycled only shallowly.  
I think since they will age out even if never cycled, it is best to cycle them, on occassion, even when one does not need to, as long as they can apply a relatively high amperage charging source promptly and take them back to  truly full.

The NS TPPL AGM battery might have been getting cycled 3to 4 amp hours overnight powering fans for the last two months, and got lazy.  The 18 and 22 AH Asian cheapo AGMS have seen little work in a long while.

The 18Ah is older, self discharges more/faster than the 22AH.  It's soon going to be attached to a 40 amp power supply  set to 14.70v to feed on all it wants.

I wonder if it alone could still start my 5.2 liter v8 engine as it did 2 or 3 years ago.

Anyway, portable batteries, portable fans are proving much more effective than the 120Vac options available  in M&Ds house, and they are just a fraction of my arsenal, and took just seconds to deploy.

Time to go plug in the mightmax 18AH to a 14.7v source, I can hear the fans slowing after 4 hours providing 3.5+ amps and the stank is gone. and my 2 remaining Model Negroes are in the Van.

I wonder how much of that 40 amps it will want to suck up, just checked voltage, 6.67!!! and 1.5 amps powering just one of 2 fans.

safe to say 100% discharged, and then some.