mass flow rate calculation of liquid co2 in orifice valve

Forum about flow calculators available on pipeflowcalculations.com and how to find solution for your fluid flow problem.
Post Reply
easy7nd
Posts: 1
Joined: Wed Apr 11, 2012 6:39 pm

mass flow rate calculation of liquid co2 in orifice valve

Post by easy7nd »

ok so here is the problem, i have a danfoss EEV controling liquid co2 entering an evaporator. i have the kv value which is 0.162m3/h. pressure differnce is 58605.4 Pa. i am using a density of 1032 kg/m3. the internal diameter of the pipe either side of the valve is 11mm. when i put these values into the control valve calculator it gives a mass flow rate of 0.034996223kg/s.

I am testing this valve for my final year mechanical engineering project so i need to show some calculations, i have tried calculating it out using some of the formulas from your page but i cant seem to get the same answer as the calculator. these are the formulas i tried using.

Image
Image

i used a specific gravity of 1.032 and the orifice diameter is 2.3mm which gives an area of 0.004154756mm2
to get the mass flow rate i was multiplying q by density

Any help is much appreciated. Thanks..
Post Reply