Co2 injection advise needed

Ok my fellow smart asses with expirence.I have added a co2 injection tank to my op.I have a 20 lb tank with a solenoid on a timer.Now My questions are for optimizing its setup.Lets say my room is sealed 8ft by 8ft by 10 ft tall.I have an inline intake fan thats 6 inches and an inline exhaust fan that is 8 inches.Now my question is during my lights on time how should I time all these things to get optimal use.I know fans need to go off during injection tomes during lights on but how long should I keep the co2 on and in the room before exhausting the old air and bringing in the new and injecting the new co2.How many times should I inject per 12 hour time and is there a formula for how much co2 per cubic foot area?I have a diamond brand valve with solenoid but no book.It has a balll guage that has SCFH measurements(not sure yet of what they stand for) with markings 1 thrus 4 depending on amount.Ok hit me with replies or complaints or other needed info so I can get this right.And dont tell me to just use baking soda and vinegar.I got my whole setup for under a $100 with full tank so its good deal lol.Thanks in advance...

I would say a great deal Fletch. I too am about to setup my CO2, so I am very interested in replies. I have my solenoid and I am waiting on my regulator. It should be in tomorrow. I have yet to secure a CO2 tank.

All, let us also consider a smaller space. Let us say 5' wide, 24" deep and 6' tall.

Thanks,

-ngtybear

Formula to firgure out how much Co2 it takes to bring the level up to 1500PPM in a room.


Total volume = Length X Width X Height = total cubic feet

Total volume = x x = total cubic feet

Total cubic feet X 1200PPM = cubic feet CO2 need to bring level
up to 1200PPM

x 0.0012 = cubic feet

_________ = x 0.33 = pounds of fuel needed
8.7

___ x 16 = ounces of fuel need to bring the CO2 level
up to 1500PPM

=_________ pounds of fuel needed

________ x 16 = ________ ounces of fuel needed
to bring up the CO2 level up to 1500PPM

One pound of fuel releases 3 pounds of CO2. Each pound of CO2 displaces 8.7 cubic feet of air.

To determine how long the valve stem should reamian open, divided the number of cubic feet of gas required by the flow rate. So if the flow meter is set at 10 cubic feet per hour the valve will need to be open for .1 hours (1 divided by 10).

Ok we are getting closer now if my mind was not completely burnt today I could do my figures.Lets go through this and hold my hand because Im scared lol.So my room is 8ft W x 8ft L x 10 H= 640 cubic feet right? so lets see I divide 640 by 8.7 and get roughly 73.6 lbs of fuel we'll say.So then divide by 3 lbs of co2 per each of those pounds I get 24.5 then if the valve is set to 10cubic ft per hour I get ...wait Im lost help me out here again see where I went wrong...

And how do I know what to set the flow meter to? The only guage is the little ball guage with the numbers starting from 1 going to 4 the wider open it is.Then once I figure the correct time to get the room to the correct ppms how long do I leave it off before exhausting the room bringing in fresh air and refilling the room with new co2?

Another post by me.I maybe a dummy on this topic for sure.Im sitting here looking at what I have an thinking maybe I need something else.I have the tank here and I have the solenoid here with its plug barb and little ball bearing guage.Am I going to need a flow adjust guage too to see how much gas Im letting out to the solenoid.Man Im feeling dumb now.I didnt even think about it thought got the tank got the solenoid and good to go.Im posting a pic of the solenoid take a look and tell me if I need something else here..Check gallery

hey cant find the pic.. post it in this thread..... I am gonna start going over the above info for you....... you owe me lol



ps did you look into propane CO2 generators? Much much better....so much cheaper

You should have a tank, regulator, soleniod valve and a flow meter... you missing any of those. I think i read that you might be missing the flow meter

Would there not be a flow meter on the regulator?

Flow meters reduce and control the cubic feet per hour. The regulator controls the PSI.

have you guys looked into propane CO2 generators?

Nope, but I am a little late down the path. I will research tonight.

Ok the picture is now in the gallery for some reason it didnt go through first time.I looked for co2 generator but all were $400 to $600 new and over $250 used and thats without a propane tank plus the heat factor is bad for me as I will fight heat in a few months as is and Im not to keen of open flames at current area.Check the picture out and keep in mind the tank just has the main shut off valve with the male nipple threads no guages.Tell me if I need more or if the little valve on the solenoid that can be adjusted is all I need..Thanks for all the help

Yeah, you need the flow meter to control the gas, and hook to the tube. You run the tube to the ceiling, and run a closed loop over your plants. The tubing has holes drilled along the way.

I didn't understand all of that 8.7 cuft stuff, so...

volume of gas required is that cubic feet x .0015, right? (for 1500 ppms)

640 x .0015 = .96 cuft of gas required

divide volume by flow rate

as an example since we don't know your flow rate,
at 50 cuft/hr would be .0192 hours.
multiply by 3600 (seconds in an hour) to get 69 seconds to release.

So, at 50 cuft/hr, turn it on for a minute each hour, with the exhaust and intakes off, and turn those on for 10 minutes right before the next release of gas. Get a digital timer and start the gas at lights on, and every hour until the 10th.

HTH

My solenoid setup has the male nipple for the hose to go on and there is some kind of meter on it that has a flow control.It has like a ball bearing that goies up or down depending on how much you turn the knob and it reads 1, 2, 3, 4 and says it reads is in like scfm I believe isnt that the flow guage adjustment your talking about? Picture is in gallery whenever thats back up.

Also do I need ahoop around each plant as its a 29-32 plant setup 8 plants per row 4 rows or can i run a line over each row off a 3way line splitter from the main line as long as its above each row?How big of holes do i need in the lines pin hole nail hole 1/8 inch?

It sounds like you have a flow meter, and the tubing is specially made for drip irrigation, and has micro-drilled holes every 8 inches in a closed-loop. You just run the tubing around the ceiling over the plants.

HTH

hello r u there im bored and trippen on loretabs

So, I have everything setup, but I am sure it is not even close to write. I don't suspect I will lose anything more than a $7 worth of gas in the process.

I have a regulator, solenoid, and a needle valve for flow control. I have no idea how much CO2 I am releasing into the environment. I have just going to turn it up little by little until they begin to respond in a positive way and then go a little further.

Pot roast, based on what you saying above, I am leaving it on for too long. I will cut it back to 1 min. Right now I have it on for 15.

Also, I will reduce the vent off time to 10 minutes (from 1.