Happy HolidaySs Giveaway - Winners Re-Re-Re-Drawn - 24 hours to Claim!

Get your HBT Growlers, Shirts and Membership before the Rush!

 Home Brew Forums > Beer Line Length and Pressure Calculator
 LinkBack Thread Tools
02-08-2011, 05:22 PM   #71
IrregularPulse
Hobby Collector
Feedback Score: 0 reviews

Recipes

Join Date: Nov 2007
Posts: 43,782
Liked 2812 Times on 2757 Posts
Likes Given: 124

Quote:
 Originally Posted by Josh1 Request a little patience for a newby: what is the volume of CO2? Is this the volume of my CO2 tank? If so, aren't compressed gasses typically measured in weight, not volume? Bottom line, it looks like a great tool, I'm just not sure how to use it because I can't figure out what my input should be for CO2 volume. Sorry for the novice questions...
Volume of CO2 is the amount of co2 dissolved in solution (beer). AKA, an English Mild will have less volumes than an American light Lager. AKA less carbonation.
__________________
Tap Room Hobo

I should have stuck to four fingers in Vegas. :o - marubozo

02-08-2011, 10:17 PM   #72
Josh1
Feedback Score: 0 reviews
Recipes

Join Date: Feb 2011
Location: Amherst, NY
Posts: 2

Quote:
 Originally Posted by IrregularPulse Volume of CO2 is the amount of co2 dissolved in solution (beer). AKA, an English Mild will have less volumes than an American light Lager. AKA less carbonation.
Now that makes a whole more sense. Thanks for the help.
__________________

02-09-2011, 02:32 PM   #73
Anguslow
Feedback Score: 0 reviews
Recipes

Join Date: Feb 2011
Location: Milwaukee, WI
Posts: 9

Quote:
 Originally Posted by brian1 Now, for any of you that want the CORRECT length of hose based upon the principles of physics, mechanical engineering, and fluid mechanics... l = 1800*d/Q²*(p-0.44h), where: l = hose length (ft) d = hose ID (in) Q = flow rate (gpm) p = gage pressure of barrel (psi) h = height difference between middle of keg and faucet (ft) So if you've got a keg that you'd like at 12psi, the faucet is 2ft above the middle of the keg, you're using 3/16" tubing, and you'd like a flow rate of 0.7gpm: l = 1800*0.1875/0.7²*(12-0.44*2) = 9.5ft. (If the faucet is above the keg, h is positive; if the keg is above the faucet, h is negative.)
Perhaps I am having a complete brainfart, but I am not seeing the same results with this equation to the excel sheet. Plus, no matter how I order the equation, I do not get 9.5 ft. Using the equations available on other sites and entering the numbers provided above, it works out to be 3.7 ft to 4 ft (depending on the equation), which does match the excel sheet. What am I not seeing here? Can someone order the equation so that I can see what is in the numerator and denominator? Finally, there is a box after the 'd', is this a power (2, or 3 perhaps)?

Thanks.
__________________

02-09-2011, 03:08 PM   #74
CPooley4
Feedback Score: 0 reviews
Recipes

Join Date: Apr 2009
Location: Cottage Grove, Wisconsin
Posts: 393
Liked 14 Times on 8 Posts

I don't have the excel sheet in front of me and haven't looked at it in quite some time. However, my guess is the difference in flow rate. Most commercial setups plan for a flow rate of 1 gallon per minute which is a bit strong for most homebrew setups. Don't know if the excel sheet is set up with 1 gallon as the default or not, but more than likely that is the culprit.

I just ran a scenario based upon your number. When I use a flow rate of .7 I get 9.7 feet of line recommended. When I use a flow rate of 1 I get 4.75 feet of line recommended. That's assuming a diameter of .1875" line.

If you'd like you can shoot me your email via pm. I have a kegging calculator/how to built into my Brew Chart. It's not in my published version as I'm still upgrading, but I'd be willing to send it to you ahead of time so you can see what I'm talking about. My kegging calculator allows the user to control the flow rate and diameter of line so that they can dial into their system better.

cp

__________________
CP's Brew Workbook

If you're considering buying brewing software do yourself a favor and download my Brew Chart/Workbook first. You may not need to spend that money.

I like beer math!

02-21-2011, 08:07 PM   #75
mattd2
Feedback Score: 0 reviews
Recipes

Join Date: Sep 2009
Location: Papamoa, New Zealand
Posts: 3,579
Liked 269 Times on 214 Posts
Likes Given: 46

Quote:
 Originally Posted by Anguslow Finally, there is a box after the 'd', is this a power (2, or 3 perhaps)? Thanks.
Shame that it has taken this long for someone to reply to your question about the "square" Angus. Since the formula is dealing with flows through a circular tube I would hazard a guess that the "square" is actually meant to be the symbol for squared (i.e. ^2 as you would enter it in excel). I think the formating of the forum probably didn't like using superscript and just blanked it out.
Hope it works out for you.
__________________

02-21-2011, 08:13 PM   #76
motobrewer
I'm no atheist scientist, but...
Feedback Score: 1 reviews
Recipes

Join Date: Oct 2009
Location: Thiensville, Wisconsin
Posts: 6,961
Liked 244 Times on 211 Posts
Likes Given: 392

uh, CP responded to him within an hour

__________________

02-21-2011, 08:45 PM   #77
mattd2
Feedback Score: 0 reviews
Recipes

Join Date: Sep 2009
Location: Papamoa, New Zealand
Posts: 3,579
Liked 269 Times on 214 Posts
Likes Given: 46

Quote:
 Originally Posted by motobrewer uh, CP responded to him within an hour
Sorry, should of been more specific about the lack of reply for what the "square" in the formula was... hang on, my reply was specific about that...

Quote:
 Originally Posted by mattd2 Shame that it has taken this long for someone to reply to your question about the "square" Angus.
__________________

02-22-2011, 04:27 AM   #78
Rcole
Feedback Score: 0 reviews
Recipes

Join Date: Jan 2011
Location: Providence, Rhode Island
Posts: 88
Liked 9 Times on 7 Posts
Likes Given: 2

Quote:
 Originally Posted by CPooley4 So say it that way without the unnecessary bs. He'd either agree and unprotect, offer the explanation above that he doesn't have the password anymore, or do nothing. Either way it's his work that he spent his time on and offered here for free for all to use. Those that don't like it or disagree with him can just make their own on their own time and offer it here for free for all to use. All the information is readily accessible to anyone that wants to take the time to do so.

"No good deed goes unpunished."
__________________

04-05-2011, 01:54 PM   #79
Bruin
Feedback Score: 0 reviews
Recipes

Join Date: Jan 2010
Location: Califon, NJ
Posts: 155

As another poster said, wow, gonna need a lot of line for my Heff! Regarding different lengths of lines for different styles: Changing line at the tower every time I change styles will be a PITA, so I'm planning on changing the length of the line by splicing on or removing a section of line to meet the line length requirement. I'm going to use some sort of nipple to make the connection. I assume I add the length of the nipple to the shank length? Being that it is a constriction at this point and offers resistance it should be taken into account, no?

__________________

08-05-2011, 05:31 AM   #80
dubuddaman
Feedback Score: 0 reviews
Recipes

Join Date: Aug 2010
Location: arizona
Posts: 3

Ok for every one on here doing this calculator, it isnt much but if you are doing a home brew/ kegerator a foot of restriction is alot. That equals 3 pounds of restriction in the system. So every 4" of 3/16" restrication line is equal to 1 pound of restriction in the line.
Also I do understand why you want to measure from the middle of the keg?? Where is the beer being sucked from?? Not the middle. It is being sucked from the bottom. Micro Matic is the only maker of these stems and valves, and you want to measure from the bottom of the keg to the faucet.

__________________

 Quick Reply Message: Options Quote message in reply?
 Thread Tools

 Similar Threads Thread Thread Starter Forum Replies Last Post shot0rum247 Kegerators and Keezers 12 07-07-2014 06:49 PM GroosBrewz Bottling/Kegging 7 03-19-2009 08:40 PM jonp9576 Bottling/Kegging 4 09-26-2008 08:59 PM Acropolis Bottling/Kegging 13 03-22-2008 08:58 PM highwayman Bottling/Kegging 3 07-29-2006 05:35 AM