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DeadPhan


Registered: 05/05/04
Posts: 5,260
Last seen: 4 years, 3 months
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Just finished flowhood! Not quite 90 degree bend on lighter test. Would u say this is laminar flow?
#16979581 - 10/06/12 06:43 PM (11 years, 4 months ago) |
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So for prefilter I just got a regular old ac filter. I Plan on going out and getting a furnace filter once I get a chance but this was at the dollar store so figured id grab it for my test run. Question.....do furnace filters add to resistance in comparison to said cheap-o ac filter? Cause that might not be an option if so. I'm not having exactly 90 degree bend on the lighter test. I took two videos...sorry for the quality and camera work as it was with my iPad. Anyhoo. One vid is with the prefilter doubled up , ie folded over. The other is just flat single layer. Even with no prefilter it's not quite 90 degrees but very close. I've read. A few accounts of anything between 45 and 90 being adequate and other accounts of 90 or nothing. Thoughts? Am I screwed? I used this filter... http://www.ebay.com/itm/NEW-ASTROCEL-I-HEPA-CLEAN-ROOM-FILTER-24-X-24-X-12-AAF-560-480-001-/221001171070?pt=LH_DefaultDomain_0&hash=item3374b2407e
With these specs.... Standard High Capacity Operating AstroCel I AstroCel I HCX Comparison 24" x 24" x 111/2" 24" x 24" x 111/2" Rated Airflow Capacity 1450 CFM 2000 CFM @ 1.4 in. w.g. (350 Pa) initial resistance (2465 m3/hr.) (3400 m3/hr.) Rated Airflow Capacity 1050 CFM 1500 CFM @ 1.0 in. w.g. (250 Pa) initial resistance (1785 m3/hr.) (2550 m3/hr.) Service Life Ratio 1.0 2.0 @ 1000 CFM (1700 m3/hr.)
And this blower..... http://www.plantlightinghydroponics.com/hurricane™-inch-inline-fan-435-cfm-p-3802.html
435 cfm
But anyway. Judging from the video how am I lookin laminar flow wise? Doubled up vid
Single layer
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Big Gulps! Alright! Well, See ya later! And if i claim to be a wise man, well, it surely means that i dont know!
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RogerRabbit
Bans for Pleasure



Registered: 03/26/03
Posts: 42,214
Loc: Seattle
Last seen: 11 months, 21 days
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Re: Just finished flowhood! Not quite 90 degree bend on lighter test. Would u say this is laminar flow? [Re: DeadPhan]
#16980473 - 10/06/12 08:55 PM (11 years, 4 months ago) |
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I'm on slow satellite internet up here so didn't look at the vids, but if the lighter bends over 45 to 90 degrees, you're good. I prefer a 45 to 60 degree bend.
The important thing is that it bends the same amount regardless of where on the filter you hold the lighter.
Get a super-allergen prefilter from 3M. Change it every 100 hours or so of operation and it will make your flowhood filter essentially last forever. RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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DeadPhan


Registered: 05/05/04
Posts: 5,260
Last seen: 4 years, 3 months
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Re: Just finished flowhood! Not quite 90 degree bend on lighter test. Would u say this is laminar flow? [Re: RogerRabbit]
#16980548 - 10/06/12 09:06 PM (11 years, 4 months ago) |
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Awesome! Thanks man! It's definitely prolly around a 60 to 70 degree bend and uniform all throughout. Maybe even more but certainly not 90. Really appreciate the feedback as I was a lil worried. Might I ask why you "prefer" 45 to 60 in regards to over 60 and up to 90? Much thanks again!
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Big Gulps! Alright! Well, See ya later! And if i claim to be a wise man, well, it surely means that i dont know!
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RogerRabbit
Bans for Pleasure



Registered: 03/26/03
Posts: 42,214
Loc: Seattle
Last seen: 11 months, 21 days
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Re: Just finished flowhood! Not quite 90 degree bend on lighter test. Would u say this is laminar flow? [Re: DeadPhan]
#16980629 - 10/06/12 09:19 PM (11 years, 4 months ago) |
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You want the least amount of flow possible to give a clean work area. Work right up against the face of the filter. If you have too much flow, it stirs up turbulence and knocks contaminants off your hands, clothes, etc., and they can swirl around and end up in your sterile work. Also, since no filter is 100% efficient, some contaminants are going to get through. If you're running a high flow rate there is a corresponding increase in contaminant load to the work area. RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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DeadPhan


Registered: 05/05/04
Posts: 5,260
Last seen: 4 years, 3 months
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Re: Just finished flowhood! Not quite 90 degree bend on lighter test. Would u say this is laminar flow? [Re: RogerRabbit]
#16980874 - 10/06/12 09:59 PM (11 years, 4 months ago) |
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Sweet. So i should be good. Question tho.....I can't notice any difference in laminar flow all throughout. However I do have the backside facing the plenum of the filter with slightly dented pleats. Nothin crazy but I was wondering if that could cause eddies and whatnot. Or would the static pressure build up enough to get in there and eliminate such an issue coming about? Just saying. Would a minuscule ..... Unable to notice with the naked eye from lighter test difference in airflow really be a big deal in not being laminar flow? Like I said. I can't tell, but wether it be paranoia or me just really wanting to cross my ps and qs I wonder all the same.
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Big Gulps! Alright! Well, See ya later! And if i claim to be a wise man, well, it surely means that i dont know!
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DeadPhan


Registered: 05/05/04
Posts: 5,260
Last seen: 4 years, 3 months
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Re: Just finished flowhood! Not quite 90 degree bend on lighter test. Would u say this is laminar flow? [Re: DeadPhan]
#16990058 - 10/08/12 11:04 AM (11 years, 4 months ago) |
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Agar vendors?
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Big Gulps! Alright! Well, See ya later! And if i claim to be a wise man, well, it surely means that i dont know!
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Blake_Shroom
Stranger


Registered: 09/09/09
Posts: 1,070
Last seen: 1 year, 3 months
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Re: Just finished flowhood! Not quite 90 degree bend on lighter test. Would u say this is laminar flow? [Re: DeadPhan]
#16990094 - 10/08/12 11:13 AM (11 years, 4 months ago) |
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Amazon has 1lb of agar for $38. Best I've found. You can also get lme really cheap too
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snakeinthegrass




Registered: 08/12/12
Posts: 243
Loc: between the north ans sou...
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Re: Just finished flowhood! Not quite 90 degree bend on lighter test. Would u say this is laminar flow? [Re: DeadPhan]
#16990495 - 10/08/12 12:11 PM (11 years, 4 months ago) |
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Quote:
And this blower..... http://www.plantlightinghydroponics.com/hurricane™-inch-inline-fan-435-cfm-p-3802.html
your link is messed up
this should work
very nice btw
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Trust No One   Mushroom cultivation isn't a dick measuring contest. That's in a different forum.
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snakeinthegrass




Registered: 08/12/12
Posts: 243
Loc: between the north ans sou...
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Re: Just finished flowhood! Not quite 90 degree bend on lighter test. Would u say this is laminar flow? [Re: RogerRabbit]
#16990523 - 10/08/12 12:15 PM (11 years, 4 months ago) |
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Quote:
RogerRabbit said: I'm on slow satellite internet up here so didn't look at the vids, but if the lighter bends over 45 to 90 degrees, you're good. I prefer a 45 to 60 degree bend....
RR
because i care....
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