Hello to all

I have a vortex Flow meter is designed for water vapor concentration range from 0 to 800 kg per hour and density is 3.67 kg per cubic meter.

To test the accuracy of this Flow meter want to test it on a volumetric system.

Oil with a density of 794 kg per cubic meter of the fluid system.

how much Maximum flow can be passed in liters per hour that from the Flow meter?

800kg/hr = ? liter/hr

Please Help me,
Thanks

 

(800kg/hr)/(3.67kg/m³)*(1000l/m³)=217983.7l/hr at the density specified.

Using significant figures, that gets rounded to 218000l/hr.

 

Assuming you intend to test this flow meter in a line passing oil with a density of 794 kg/cubic meter at a known flow rate of 800 kg/hr, then:

800 / 794 = 1.0076 cubic meters/hr. Since there are 1000 liters in a cubic meter, 1.0076 cubic meters/hr = 1007.6 liters/hr.

This is assuming the density of the oil is constant (meaning its temperature is constant).

 

800kg/hr is a mass flow rate. Conversion to volumetric flow rate must be at the fluid's specific density: 800kg/(3.67kg/m^3)=218m^3/hr. Multiply by 1000liters/m^3 for liters/hour.

Volumetric flow rate would be the same for any fluid, regardless of specific density. Personally, I would test/calibrate with water rather than oil.

>Assuming you intend to test this flow meter in a line
>passing oil with a density of 794 kg/cubic meter at a known
>flow rate of 800 kg/hr, then:
>
>800 / 794 = 1.0076 cubic meters/hr. Since there are 1000
>liters in a cubic meter, 1.0076 cubic meters/hr = 1007.6
>liters/hr.

 

thanks all ,

(800kg/hr) / ( 3.67 kg/m3 ) = 218 m^3/hr

This is true, but my vortex flow meter diameter is 1.5 inch.

how do i can passed 218 m^3/hr oil from it?

max flow rate for pass a 1.5 inch pipe is:

45.148 m^3/hr (1.5 inch diameter and 11 m/s velocity)

<b>flow rate = 1/4 * pi * (pipe diameter)^2 * velocity </b>

http://www.1728.org/flowrate.htm

it is impossible.

this vortex flow meter made for water vapor with 3.67 kg/m3. but now i want to test it with oil (density = 0.7941 kg/lit ).

I fell 100.7 lit/hr is very low for this type of flow meter.

thanks again

 

How are you determining velocity?

 

You have realized that compressible fluids are far different from non-compressible liquids. Really Vortex flowmeters measure Velocity (Volume flow) not mass flow. A typical 1-1/2" meter measures 0.21 - 7.6 m/s for liquid 1.98 - 76 m/s for gas (10 x the velocity for gas)
I would check it on liquid somewhere near the top end of it's range against a mag flow meter (water).

If you are seeing a significant error on water vapour the chances are you have the pressure or temperature wrong in the calculation.

Roy