Calculating flow through (heating water) coil given only pressure drop and coil measurements 1

[Mark_B]

I have a Titus DESV-06 with a single-row heating water coil and would like to be able to calculate flow rate in real time using information supplied by two Dwyer pressure transducers (one at inlet, one at outlet). I was not able to locate a manufacturer table. I will attempt to get the information from Titus, and remain hopeful someone here can supply it, but in the mean time would like to learn about the calculation.

I was reading through a thread here where I came across a specific method of calculation posted by user 25362:

"Professor Lydersen (Fluid flow and heat transfer-Wiley) states that you may use the usual friction drop formula with its [±]10-15% accuracy. He says that the friction factors can be obtained from Srinivasan, Nandapurkar and Holland: Friction factors for coils, Trans. Instn. Chem. Engrs., 48, T156-T161 (1970)."

water flow through a coil

Hi all, I'm in a plant were circuit setters on air handlers were not always used (hand valves instead throttled down). THe problem I have , aside from balancing, I can't tell how much flow is running through a coil. I can contact the coil manufacturer and give him the Delta P and he can run...

www.eng-tips.com

This seems to be for a different type of coil, and not to apply to my Titus VAV coil, which I believe is single inlet but not helical. Is there a method of mathematical calculation for mine? Or do I need to cough up $500 for a flow meter, or fill a bunch of marked buckets at different rates and take notes?

 

[LittleInch]

Diagram? There seems to be something really quite odd here.