Vortex Flowmeter Designing & installing for meter

Vortex Flowmeter Designing & installing for meter

5.When tested gas is vapor,often use quality flow as unit of measurement quality flow,as:t/h or Kg/h. because of vapor(overheating & saturated),density would be changed under different temp & press,so to ensure the flow range, see (8)

    图片1.png formula(8)                                                      

TIPS:

Ρ:density of vapor (kg/m3) 

ρ0:1.205kg/m3

Q steam:quality flow of vapor (t/h)

 

6.For pressure loss, check the effect of pressure loss to craft pipeline,(Unit: Pa):

Δp= CdρV2/2    formula(9)

Tips:

P: density of medium under working condition (9kg/m3)V: mean flow rate(m/s)

7.If tested medium is liquid, to avoid is Δp: pressure loss (Pa)  Cd:coefficient of pressure loss.

classifications and loss, shall make the press of pipeline as follow:

p≥2.7Δp+1.3p0     formula(10)

Tips: Δp: pressure loss(Pa)

p0: saturated vapor pressure of liquid which under working temperature.

(Pa absolute pressure)  Po: Fluid vapor pressure (Pa absolute pressure)

 

8. Vortex flow meter flow meter is not suitable for testing high viscosity liquid. if counted measurable lower  limit flow is not suitable for designing, pls select and use other meter type.

9.If as the counted parameter, the two or more kinds of meter can be used, then use  less caliber, cheaper. Tips: as far as possible tested range during upper limit of  about  1/2~2/3.

 

Chart(II) extent table of reference condition under working condition


name

density (kg/m3)

name

Density:(kg/m3)

air(dry)

1.2928

acetylene

1.1717

nitrogen

1.2506

ethylene

1.2604

oxygen

1.4289

propylene

1.9140

argon

1.7840

methane

0.7167

Ne

0.9000

ethane

1.3567

ammonia

0.7710

propane

2.0050

hydrogen

0.08988

butane

2.7030

carbon monoxide

1.97704

natural gas

0.8280

carbon dioxide

1.3401

Coal gas

0.8020


Tips:above table  the caliber (300)~(1000) is plug-in