Measuring Variable Plane Flow Rate

[plucker_08]

guys, how to measure the volumetric flow rate pass thru a plane that varies in area (small variation)

 

[h2oski1326]

http://www.omega.com/prodinfo/flowmeters.html

 

[FredGarvin]

Are you inferring that you have some kind of orifice valve or something varying the flow area?

 

[plucker_08]

Are you inferring that you have some kind of orifice valve or something varying the flow area?

something varying he flow area. i would like to measure the flow rate passing thru the condenser and the evaporator of a window-type air conditioner

 

[fishfool]

based on what you guys are asking, we have the same kind of issue, we're a network of fish enthusiasts http://www.thereeftank.com/forums/f217/head-loss-calculator-112890.html who are discussing whether or not the calculator found here is accurate or not... if anyone would like to take a look at it and help us out it would be rightly appreciated, especially since I am really, really inept when it comes to math.

 

[stewartcs]

based on what you guys are asking, we have the same kind of issue, we're a network of fish enthusiasts http://www.thereeftank.com/forums/f217/head-loss-calculator-112890.html who are discussing whether or not the calculator found here is accurate or not... if anyone would like to take a look at it and help us out it would be rightly appreciated, especially since I am really, really inept when it comes to math.

Hard to tell since they don't state all of the required inputs. I presume that they make some assumptions for you and then just use the requested data to come up with their answer.

However, a quick hand calculation shows that for a 100-ft length pipe with a Blue Line HD pump (have no idea what the specs are for that pump so I'm using the output flow rate in the calc) shows that you should have about a 13.5 psi pressure drop, not 10.6 psi like they indicated. I'm assuming they are using fresh water with a viscosity of 2.3 cP and a temperature of 60 degrees F, as well as stainless steel pipe. Therefore their answer seems reasonable based on the limited information and assumptions made.

Hope that helps.

CS

 

[fishfool]

wow thanks
well
uh
>math idiot<
least it helps me know if it's accurate ahahah :D