chromer
Well-Known Member
My room mate and I got nice and baked and were trying figure out how long our CO2 tank/regulator had to be flowing to raise the grow room CO2 ppm to ~1500… And this is what we came up with.. is this method realistic?
(some measurements are in metric, others imperial, sorry, the conversions are pretty easy.. I just don’t wanna do more math)
‘normal’ CO2 levels in the atmosphere are around 300-400ppm.. so the concentration of CO2 in the atmosphere is around 0.03% (for arguments sake)
The grow room (which is 1.944m3) is situated in the storage room which is 12.5m3…. so there is approximately 12.5m3x0.0003=0.00375 m3 of CO2 in the storage/grow room.
To achieve 1500ppm or 0.15% CO2 concentration, we needed 0.01875m3 of carbon dioxide… ( 12.5x0.0015=0.01875 )
So we have a difference of 0.01875 – 0.00375 = 0.015 m3 of carbon dioxide
We roughly measured the flow rate of the carbon dioxide tank (PSI was about 2.5) by timing how long a large balloon took to fill a 1gallon with CO2.. it was something like 54 seconds.. by doing some converting, we solved our flow rate to be 0.004205m3/minute
One last calculation… 0.015 m3(amount needed) / 0.004205m3/minute (rate) = 3.57.. or 3 minutes and 34 seconds
So that tells me that it takes 3mins, 34secs to raise the CO2 ppm to 1500…. And now my question, is this a realistic method of tackling this problem??
(some measurements are in metric, others imperial, sorry, the conversions are pretty easy.. I just don’t wanna do more math)
‘normal’ CO2 levels in the atmosphere are around 300-400ppm.. so the concentration of CO2 in the atmosphere is around 0.03% (for arguments sake)
The grow room (which is 1.944m3) is situated in the storage room which is 12.5m3…. so there is approximately 12.5m3x0.0003=0.00375 m3 of CO2 in the storage/grow room.
To achieve 1500ppm or 0.15% CO2 concentration, we needed 0.01875m3 of carbon dioxide… ( 12.5x0.0015=0.01875 )
So we have a difference of 0.01875 – 0.00375 = 0.015 m3 of carbon dioxide
We roughly measured the flow rate of the carbon dioxide tank (PSI was about 2.5) by timing how long a large balloon took to fill a 1gallon with CO2.. it was something like 54 seconds.. by doing some converting, we solved our flow rate to be 0.004205m3/minute
One last calculation… 0.015 m3(amount needed) / 0.004205m3/minute (rate) = 3.57.. or 3 minutes and 34 seconds
So that tells me that it takes 3mins, 34secs to raise the CO2 ppm to 1500…. And now my question, is this a realistic method of tackling this problem??