E_7403-9008-01_ Air Flow Calculation VENTURI_Customer

LOESCHE VENTURI TUBE

Version 1.7, Juli 2001

Sprache, Language,Lengua, Langue (D,E,S,F,O)

:

E

=English

Project

: Chakwal Coal

Dwg. No.

: 4.E7403-9008/01

Name Date Mounting point

: Hartung : 2005-01-04 : Filter outlet

Inputs Temperature Height above sea level

: (0...4000) :

Pipe diameter Relative density NORM

90.00 °C

: ( ...1,5)

:

T

752.00 m

H

1 600.00 mm 1.37 kg/Nm

D r (RHO)

Static pressure relative

:

Operation-Volume rate of flow ACTUAL

:

Operation-Volume rate of flow DESIGN

:

2.00 mbar   125 00 000.00 m /h 140 00 000.00 m /h

Intermediate values Static pressure Ambient

:

926.28 mbar  

Static pressure absolut

:

Norm-Volume rate of flow ACTUAL

:

Norm-Volume rate of flow DESIGN

:

928.28 mbar   86 146.09 m /h 96 483.62 m /h

Specific density Operation

:

9.26 N/m

Gas velocity ACTUAL

:

17.27 m/s

Vt

Gas velocity DESIGN

:

19.34 m/s

Va

Calculate Effective pressure ACTUAL

:

2.57 mbar  

Pwirkm

Effective pressure requested

:

5.00 mbar  

Pwirkg

Internal diameter calculated

:

1 113.38 mm

ddr 

Internal diameter rounded

:

1 200.00 mm

ddw

Outputs Orifice ratio Flow coefficient Constant

: : :

Pressure after rounded off internal diam.

:

3.09 mb m bar  

:

3.87 mbar

Pressure loss ACTUAL

:

0.07 mbar  

Pverlt

Pressure loss DESIGN

:

0.09 mbar  

Pverla

Transducer setting

Venturi dimensions: Length Length Length Venturi length Tapping point separation Tapping point separation

165112555.xls.ms_office

(3,5...5)

L1 L2 L3 L1+L2+L3 L4 L5

: : : : : :

P Qt Qa

Patm Pa Qtn Qan g (GAMMA)

0.56 1.20 21 648.91

983.03 600.00 1 423.07 3 006.11 800.00 360.00

1/2

<- Gas velocity ~ 20 m/s !

m a (alpha)

mm mm mm mm mm mm

C Pwirkt  

Pwirka

L1 L2 L3 L1_3 L4 L5

8/17/2013, 1:06 PM

Project

LOESCHE VENTURI TUBE Calculation Revision

Date

Name

: Chakwal Coal

Dwg. No.

: 4.E7403-9008/01

Name

: Hartung

Date

: 2005-01-04

Index

Mounting point: Filter outlet

Sheet 1 of 1 Filename

Dimens. sheet pressure meas. stud: Mount. arr. pressure measurement stud:

Inputs

3.L0790-0018/22 3.L0790-0018/04

: Temperature Height above sea level Pipe diameter

: J : h : D

= = =

Relative density NORM

: rN

=

Static pressure relative Operation-Volume rate of flow ACTUAL

: p = : VOD =

125 000 m3/h

Operation-Volume rate of flow DESIGN

: VOA =

140 000 m3/h

: VND =

96 484 m3/h

Intermediate values : Norm-Volume rate of flow DESIGN

Outputs

: E_7403-9008-01_  

90 °C 752 m 1 600 mm 1.37 kg/m3 2 mbar  

Specific density Operation

: gO

=

Gas velocity DESIGN

: v

=

9.26 N/m3 19.34 m/s 1 200 mm

: Internal diameter

: d

=

Transducer setting

: Dps

=

3.87 mbar  

Pressure loss DESIGN

: DpD =

0.09 mbar  

Venturi dimensions: D-d

L1

=

--------------

1600 - 1200 =

2 x tan11.5°

----------------

=

983 mm

2 x 0.2035

L2

=

0.5 x d

=

0.5 x 1200

=

600 mm

L3

=

D-d -------------2 x tan8°

=

1600 - 1200 ---------------2 x 0.1405

=

1 423 mm

=

3 006 mm

Total length

[L1 + L2 + L3]

Tapping point separation L4

=

0.5 x D

=

0.5 x 1600

=

800 mm

L5

=

0.3 x d

=

0.3 x 1200

=

360 mm