Calculation of Blower Air Pipe Pressure Loss(Ave)

Summary Pressure Loss in Air Pipe Blower outlet Blower Main Blower Main Bran"# Bran"# Bran"# Bran"# Di%%user loss ')ase* on min %lowrate( '6&00 m$,#r(

DN 750 DN 1800 DN 100 DN 600 DN 500 DN $50 DN 00 +otal

46.18 41.1! 11.78 411.00 86.60 180.66 570.1! 5&000.00 6848.61 6.85

Pa Pa Pa Pa Pa Pa Pa Pa Pa -pa

'esimate(

Air Pressure Loss in Straight Pipe/Duct Air Velocity v   A *

= Q / / / /

/ A

Air elo"ity'm,s( Air low 2ate'm$,s( 3ross Se"ttional Area'm( uter Diameter o% Pipe'm(  / 5.4! * / 0.750 A / 0.44 

/

1.41

m$,s m m

1!&750

Nm,#r

m ,s Sp

Re

=

2e *  

/ / / /



R 2 * 

d

v μ

ρ

2eynol* num)ers Diameter o% pipe'm( elo"ity'm,s( Air Density';,m(

/ Dynami" or a)soulute is"osity'Ns,m( * /  /  /

0.750 1.41 1.$

m m ,s ;,m

 /

1.7!C10:5

Ns,m

2e /

6.409:05

= k / d / 2elatie 2ou;#ness 2atio / Diameter o% pipe'mm( / Sur%a"e 2ou;#ness'mm(  /

0.015

mm

* / 2 /

750 0.00000

mm

'rom
Surace Roughness Roughness " k " k Surace !illi!eters

eet

3o pp ppe r&r& Lea *& *& Brass& Al um umin um um 'new(

0.00 1 : 0 .0 .00

$.$$ : 6.7 10 :6

P3 an* Plasti" Pipes

0.0015 : 0.007

0.5 : .$$ 10:5

9po=y& inyl 9ster an* >sop#t#ali" pipe

0.005

1.7 10 :5

Stainless steel

0.015

5 10 :5

Steel "ommer"ial pipe

0.045 : 0.0!

1.5 : $ 10:4

Stret"#e* steel

0.015

5 10 :5

?el* steel

0.045

1.5 10:4

0.15

5 10 :4

2uste* steel '"orrosion(

0.15 : 4

5 : 1$$ 10:4

New "ast iron

0.5 : 0.8

8 : 7 10:4

?orn "ast iron

0.8 : 1.5

.7 : 5 10:$

2usty "ast iron

1.5 : .5

5 : 8.$ 10:$

S#eet or asp#alte* "ast iron

0.01 : 0.015

$.$$ : 5 10:5

Smoot#e* "ement

0.$

1 10 :$

r*inary "on"rete

0.$ : 1

1 : $.$$ 10:$

3oarse "on"rete

0.$ : 5

1 : 16.7 10:$


= Q / / / /

/ A

Air elo"ity'm,s( Air low 2ate'm$,s( 3ross Se"ttional Area'm( uter Diameter o% Pipe'm(  / 5.4! * / 0.750 A / 0.44 

/

1.41

m$,s m m

1!&750

Nm,#r

m ,s Sp

Re

=

2e *  

/ / / /



R 2 * 

d

v μ

ρ

2eynol* num)ers Diameter o% pipe'm( elo"ity'm,s( Air Density';,m(

/ Dynami" or a)soulute is"osity'Ns,m( * /  /  /

0.750 1.41 1.$

m m ,s ;,m

 /

1.7!C10:5

Ns,m

2e /

6.409:05

= k / d / 2elatie 2ou;#ness 2atio / Diameter o% pipe'mm( / Sur%a"e 2ou;#ness'mm(  /

0.015

mm

* / 2 /

750 0.00000

mm

'rom
Surace Roughness Roughness " k " k Surace !illi!eters

eet

3o pp ppe r&r& Lea *& *& Brass& Al um umin um um 'new(

0.00 1 : 0 .0 .00

$.$$ : 6.7 10 :6


0.0015 : 0.007

0.5 : .$$ 10:5


0.005

1.7 10 :5

Stainless steel

0.015

5 10 :5


0.045 : 0.0!

1.5 : $ 10:4

Stret"#e* steel

0.015

5 10 :5

?el* steel

0.045

1.5 10:4

0.15

5 10 :4


0.15 : 4

5 : 1$$ 10:4

New "ast iron

0.5 : 0.8

8 : 7 10:4

?orn "ast iron

0.8 : 1.5

.7 : 5 10:$

2usty "ast iron

1.5 : .5

5 : 8.$ 10:$


0.01 : 0.015

$.$$ : 5 10:5

Smoot#e* "ement

0.$

1 10 :$

r*inary "on"rete

0.$ : 1

1 : $.$$ 10:$

3oarse "on"rete

0.$ : 5

1 : 16.7 10:$

?ell plane* woo*

0.18 : 0.!

6 : $0 10 :4

r*inary woo*

5

16.7 10:$

+#ere%ore& R / 0.00000 Re / 6.409:05 #he $oody %rictor %actor Diagra!

%ro! the &oody Diagra! 'elo(

) /

0.014

So* total head loss +alculation is stated as 'elo(,

P"loss

=

) - l/d. -ρ v/.

P:loss / Pressure Loss'Pa('N,m(

 l   *

/ / / / /

Moo*y ri"tion a"tor +otal Len;t# o% Pipe'm( Density';,m$( Air elo"ity'm,s( Diameter o% Pipe'm(

 / l /  /  / * / P"loss

/

0.014  1.$ 1.41 0.75 $.54

m ;,m$ m,s m Pa

+otal Pressure loss %or strain;#t pipe /

$.54

Pa

Air Pressure Loss in Pipe %ittings and +o!ponents

&o,

#ype o +o!ponent or %itting

1  $ 4 5 6 7 8 ! 10 11 1 1$ 14 15 16 17 18 1! 0 1  $ 4 5 6

lan;e*,wel*e* +ees& Line low

+oeicient o $inor loss

&u!'ers o ittings

#otal

" ξ "

0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0

0.

+#rea*e* +ees& Line low

0.!

lan;e*,wel*e* +ees& Bran"#e* low

1.0

+#rea*e* +ees& Bran"# low

.0

+#rea*e* Enion

0.08

lan;e*,wel*e* 2e;ular !0 o 9l)ows

0.$

+#rea*e* 2e;ular !0 o 9l)ows

1.5

o

+#rea*e* 2e;ular 45 9l)ows

0.4

lan;e*,wel*e* Lon; 2a*ius !0 o 9l)ows

0.

+#rea*e* Lon; 2a*ius !0 o 9l)ows

0.7

o

lan;e*,wel*e* Lon; 2a*ius 45 9l)ows

0.

+#rea*e* Lon; 2a*ius 45 o 9l)ows

0.7

lan;e*,wel*e* 180 o 2eturn Ben*s

0.

o

+#rea*e* 180 2eturn Ben*s

1.5

lan;e*,wel*e* e=pansion

0.4

lan;e*,wel*e* re*u"er

1.5

ully pen
10

ully pen An;le ale



ully pen
0.15

1,4 3lose*
0.6

1, 3lose*
.1

$,4 3lose*
17

orwar* low Swin; 3#e" ale



ully pen Ball ale

0.05

1,$ 3lose* Ball ale

5.5

,$ 3lose* Ball ale

00

#otal loss o coeicient

P"loss =

ξ

0 ρ v

P:loss / Pressure Loss'Pa('N,m( / Minor loss "oe%%i"ient  / Air Density';,m$(  / Air elo"ity'm,s(

ξ

/  /  /

0.45 1.$ 1.41

;,m$ m,s

:loss /

4.64

Pa

ξ

+otal Pressure loss %or pipe %iitin;s /

4.64

Pa

#otal Pressure loss or air 'lo(er piping syste! =

46.18

Pa

+#ere%ore&

0.00 0.00 0.00 0.00 0.00 0.$0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.15 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.45


= Q / / / /

Re

=

2e *   

/ / / / /

/ A

Air elo"ity'm,s( Air low 2ate'm$,s( 3ross Se"ttional Area'm( uter Diameter o% Pipe'm(  / 1.!4 * / 1.800 A / .55  / 8.6

d

v μ

7!&000

Nm,#r

ρ

2eynol* num)ers Diameter o% pipe'm( elo"ity'm,s( Air Density';,m( Dynami" or a)soulute is"osity'Ns,m( *   

R 2 * 

m$,s m m m,s

/ / / /

1.800 8.6 1.$ 1.7!C10:5

2e /

1.079:04

m m,s ;,m Ns,m

= k / d / 2elatie 2ou;#ness 2atio / Diameter o% pipe'mm( / Sur%a"e 2ou;#ness'mm(  / * / 2 /

0.015 1800 0.000008

mm mm

'rom
Surace Roughness Surace

Roughness " k !illi!eters

eet

3opper& Lea*& Brass& Al uminum 'new(

0.001 : 0.00

$.$$ : 6.7 10 :6


0.0015 : 0.007

0.5 : .$$ 10 :5


0.005

1.7 10:5

Stainless steel

0.015

5 10:5


0.045 : 0.0!

1.5 : $ 10 :4

Stret"#e* steel

0.015

5 10:5

?el* steel

0.045

1.5 10:4

0.15

5 10:4


0.15 : 4

5 : 1$$ 10 :4

New "ast iron

0.5 : 0.8

8 : 7 10 :4

?orn "ast iron

0.8 : 1.5

.7 : 5 10 :$

2usty "ast iron

1.5 : .5

5 : 8.$ 10 :$


0.01 : 0.015

$.$$ : 5 10 :5

Smoot#e* "ement

0.$

1 10:$

r*inary "on"rete

0.$ : 1

1 : $.$$ 10 :$

3oarse "on"rete

0.$ : 5

1 : 16.7 10 :$

?ell plane* woo*

0.18 : 0.!

6 : $0 10 :4

r*inary woo*

5

16.7 10:$

+#ere%ore& R / 0.000008 Re / 1.079:04 #he $oody %rictor %actor Diagra!


) /

0.0


P"loss

=

) - l/d. -ρ v/.


 l   *

/ / / / /


 / l /  /  / * / P"loss

/

0.0 70 1.$ 8.6 1.80

m ;,m$ m,s m

$5.54

Pa


$5.54

Pa


&o,


1  $ 4 5 6 7 8 ! 10 11 1 1$ 14 15 16 17 18 1! 0 1  $ 4 5 6




#otal

" ξ "

7 0 0 0 0  0 0 0 0 0 0 0 0 0  0 0 0 0 0 0 0 0 0 0

0.


0.!


1.0


.0

+#rea*e* Enion

0.08


0.$


1.5

o


0.4


0.


0.7

o


0.


0.7


0.

o


1.5


0.4


1.5

ully pen
10




ully pen
0.15

1,4 3lose*
0.6

1, 3lose*
.1

$,4 3lose*
17





0.05


5.5


00


P"loss =

ξ

0 ρ v


ξ

/  /  /

ξ

:loss /

4.50 1.$ 8.6 05.64

;,m$ m,s Pa


05.64

Pa


41.1!

Pa

+#ere%ore&

1.40 0.00 0.00 0.00 0.00 0.60 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 .50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.50


= Q / / / /

Re

=

2e *   

/ / / / /

/ A

Air elo"ity'm,s( Air low 2ate'm$,s( 3ross Se"ttional Area'm( uter Diameter o% Pipe'm(  / 10.!7 * / 1.00 A / 1.1$  / !.70

d

v μ

$!&500

Nm,#r

ρ


R 2 * 

m$,s m m m,s

/ / / /

1.00 !.70 1.$ 1.7!C10:5

2e /

8.009:05



0.015 100 0.00001$

mm mm

'rom


eet


0.001 : 0.00

$.$$ : 6.7 10 :6


0.0015 : 0.007

0.5 : .$$ 10 :5


0.005

1.7 10:5

Stainless steel

0.015

5 10:5


0.045 : 0.0!

1.5 : $ 10 :4

Stret"#e* steel

0.015

5 10:5

?el* steel

0.045

1.5 10:4

0.15

5 10:4


0.15 : 4

5 : 1$$ 10 :4

New "ast iron

0.5 : 0.8

8 : 7 10 :4

?orn "ast iron

0.8 : 1.5

.7 : 5 10 :$

2usty "ast iron

1.5 : .5

5 : 8.$ 10 :$


0.01 : 0.015

$.$$ : 5 10 :5

Smoot#e* "ement

0.$

1 10:$

r*inary "on"rete

0.$ : 1

1 : $.$$ 10 :$

3oarse "on"rete

0.$ : 5

1 : 16.7 10 :$

?ell plane* woo*

0.18 : 0.!

6 : $0 10 :4

r*inary woo*

5

16.7 10:$

+#ere%ore& R / 0.00001$ Re / 8.009:05 #he $oody %rictor %actor Diagra!


) /

0.018


P"loss

=

) - l/d. -ρ v/.


 l   *

/ / / / /


 / l /  /  / * / P"loss

/

0.018 0 1.$ !.70 1.0

m ;,m$ m,s m

17.$5

Pa


17.$5

Pa


&o,


1  $ 4 5 6 7 8 ! 10 11 1 1$ 14 15 16 17 18 1! 0 1  $ 4 5 6




#otal

" ξ "

 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0

0.


0.!


1.0


.0

+#rea*e* Enion

0.08


0.$


1.5

o


0.4


0.


0.7

o


0.


0.7


0.

o


1.5


0.4


1.5

ully pen
10




ully pen
0.15

1,4 3lose*
0.6

1, 3lose*
.1

$,4 3lose*
17





0.05


5.5


00


P"loss =

ξ

0 ρ v


ξ

/  /  /

1.65 1.$ !.70

;,m$ m,s

:loss /

!5.4$

Pa

ξ


!5.4$

Pa


11.78

Pa

+#ere%ore&

0.40 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.5 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.65


= Q / / / /

Re

=

2e *   

/ / / / /

/ A

Air elo"ity'm,s( Air low 2ate'm$,s( 3ross Se"ttional Area'm( uter Diameter o% Pipe'm(  / $.66 * / 0.600 A / 0.8  / 1.!$

d

v μ

1$&16

Nm,#r

ρ


R 2 * 

m$,s m m m,s

/ / / /

0.600 1.!$ 1.$ 1.7!C10:5

2e /

5.$$9:05



0.015 600 0.00005

mm mm

'rom


eet


0.001 : 0.00

$.$$ : 6.7 10 :6


0.0015 : 0.007

0.5 : .$$ 10 :5


0.005

1.7 10:5

Stainless steel

0.015

5 10:5


0.045 : 0.0!

1.5 : $ 10 :4

Stret"#e* steel

0.015

5 10:5

?el* steel

0.045

1.5 10:4

0.15

5 10:4


0.15 : 4

5 : 1$$ 10 :4

New "ast iron

0.5 : 0.8

8 : 7 10 :4

?orn "ast iron

0.8 : 1.5

.7 : 5 10 :$

2usty "ast iron

1.5 : .5

5 : 8.$ 10 :$


0.01 : 0.015

$.$$ : 5 10 :5

Smoot#e* "ement

0.$

1 10:$

r*inary "on"rete

0.$ : 1

1 : $.$$ 10 :$

3oarse "on"rete

0.$ : 5

1 : 16.7 10 :$

?ell plane* woo*

0.18 : 0.!

6 : $0 10 :4

r*inary woo*

5

16.7 10:$

+#ere%ore& R / 0.00005 Re / 5.$$9:05 #he $oody %rictor %actor Diagra!


) /

0.015


P"loss

=

) - l/d. -ρ v/.


 l   *

/ / / / /


 / l /  /  / * / P"loss

/

0.015 114 1.$ 1.!$ 0.60

m ;,m$ m,s m

!.84

Pa


!.84

Pa


&o,


1  $ 4 5 6 7 8 ! 10 11 1 1$ 14 15 16 17 18 1! 0 1  $ 4 5 6 7




#otal

" ξ "

1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1

0.


0.!


1.0


.0

+#rea*e* Enion

0.08


0.$


1.5

o


0.4


0.


0.7

o


0.


0.7


0.

o


1.5


0.4


1.5

ully pen
10




ully pen
0.15

1,4 3lose*
0.6

1, 3lose*
.1

$,4 3lose*
17





0.05


5.5


00

lowmeter

0.8


P"loss =

ξ

0 ρ v


ξ

/  /  /

1.15 1.$ 1.!$

;,m$ m,s

:loss /

118.16

Pa

ξ


118.16

Pa


411.00

Pa

+#ere%ore&

0.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.15 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.80 1.15


= Q / / / /

Re

=

2e *   

/ / / / /

/ A

Air elo"ity'm,s( Air low 2ate'm$,s( 3ross Se"ttional Area'm( uter Diameter o% Pipe'm(  / .46 * / 0.500 A / 0.0  / 1.51

d

v μ

8&84$

Nm,#r

ρ

2eynol* num)ers Diameter o% pipe'm( elo"ity'm,s( Air Density';,m( Dynami" or a)soulute is"osity'Ns,m( * /  /  /

R 2 * 

m$,s m m m,s

 /

0.500 1.51 1.$ 1.7!C10:5

2e /

4.$09:05



0.015 500 0.0000$0

mm mm

'rom


eet

3opper& Lea*& Brass& Aluminum 'new(

0.001 : 0.00

$.$$ : 6.7 10:6


0.0015 : 0.007

0.5 : .$$ 10:5


0.005

1.7 10:5

Stainless steel

0.015

5 10:5


0.045 : 0.0!

1.5 : $ 10 :4

Stret"#e* steel

0.015

5 10:5

?el* steel

0.045

1.5 10:4

0.15

5 10:4


0.15 : 4

5 : 1$$ 10 :4

New "ast iron

0.5 : 0.8

8 : 7 10 :4

?orn "ast iron

0.8 : 1.5

.7 : 5 10 :$

2usty "ast iron

1.5 : .5

5 : 8.$ 10 :$


0.01 : 0.015

$.$$ : 5 10:5

Smoot#e* "ement

0.$

1 10:$

r*inary "on"rete

0.$ : 1

1 : $.$$ 10:$

3oarse "on"rete

0.$ : 5

1 : 16.7 10:$

?ell plane* woo*

0.18 : 0.!

6 : $0 10 :4

r*inary woo*

5

16.7 10:$

+#ere%ore& R / 0.0000$0 Re / 4.$09:05 #he $oody %rictor %actor Diagra!


) /

0.015


P"loss

=

) - l/d. -ρ v/.


 l   *

/ / / / /


 / l /  /  / * / P"loss

/

0.015 51 1.$ 1.51 0.50

m ;,m$ m,s m

147.15

Pa


147.15

Pa


&o,


1  $ 4 5 6 7 8 ! 10 11 1 1$ 14 15 16 17 18 1! 0 1  $ 4 5 6 7




#otal

" ξ "

1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0

0.


0.!


1.0


.0

+#rea*e* Enion

0.08


0.$


1.5

o


0.4


0.


0.7

o


0.


0.7


0.

o


1.5


0.4


1.5

ully pen
10




ully pen
0.15

1,4 3lose*
0.6

1, 3lose*
.1

$,4 3lose*
17





0.05


5.5


00

lowmeter

0.8


P"loss =

ξ

0 ρ v


ξ

/  /  /

ξ

:loss /

1.45 1.$ 1.51

;,m$ m,s

1$!.45

Pa


1$!.45

Pa


86.60

Pa

+#ere%ore&

0.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.5 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.45


= Q / / / /

Re

=

2e *   

/ / / / /

/ A

Air elo"ity'm,s( Air low 2ate'm$,s( 3ross Se"ttional Area'm( uter Diameter o% Pipe'm(  / 0.!7 * / 0.$50 A / 0.10  / 10.04

d

v μ

$&478

Nm,#r

ρ


R 2 * 

m$,s m m m,s

 /

0.$50 10.04 1.$ 1.7!C10:5

2e /

.419:05



0.015 $50 0.00004$

mm mm

'rom


eet


0.001 : 0.00

$.$$ : 6.7 10:6


0.0015 : 0.007

0.5 : .$$ 10:5


0.005

1.7 10:5

Stainless steel

0.015

5 10:5


0.045 : 0.0!

1.5 : $ 10 :4

Stret"#e* steel

0.015

5 10:5

?el* steel

0.045

1.5 10:4

0.15

5 10:4


0.15 : 4

5 : 1$$ 10 :4

New "ast iron

0.5 : 0.8

8 : 7 10 :4

?orn "ast iron

0.8 : 1.5

.7 : 5 10 :$

2usty "ast iron

1.5 : .5

5 : 8.$ 10 :$


0.01 : 0.015

$.$$ : 5 10:5

Smoot#e* "ement

0.$

1 10:$

r*inary "on"rete

0.$ : 1

1 : $.$$ 10:$

3oarse "on"rete

0.$ : 5

1 : 16.7 10:$

?ell plane* woo*

0.18 : 0.!

6 : $0 10 :4

r*inary woo*

5

16.7 10:$

+#ere%ore& R / 0.00004$ Re / .419:05 #he $oody %rictor %actor Diagra!


) /

0.017


P"loss

=

) - l/d. -ρ v/.


 l   *

/ / / / /


 / l /  /  / * / P"loss

/

0.017 4 1.$ 10.04 0.$5

m ;,m$ m,s m

7.$

Pa


7.$

Pa


&o,


1  $ 4 5 6 7 8 ! 10 11 1 1$ 14 15 16 17 18 1! 0 1  $ 4 5 6 7




#otal

" ξ "

1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0

0.


0.!


1.0


.0

+#rea*e* Enion

0.08


0.$


1.5

o


0.4


0.


0.7

o


0.


0.7


0.

o


1.5


0.4


1.5

ully pen
10




ully pen
0.15

1,4 3lose*
0.6

1, 3lose*
.1

$,4 3lose*
17





0.05


5.5


00

lowmeter

0.8


P"loss =

ξ

0 ρ v


ξ

/  /  /

ξ

:loss /

1.75 1.$ 10.04

;,m$ m,s

108.4$

Pa


108.4$

Pa


180.66

Pa

+#ere%ore&

0.0 0.00 0.00 0.00 0.00 0.$0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.5 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.75


= Q / / / /

Re

=

2e *   

/ / / / /

/ A

Air elo"ity'm,s( Air low 2ate'm$,s( 3ross Se"ttional Area'm( uter Diameter o% Pipe'm(  / 0.41 * / 0.00 A / 0.0$  / 1.!5

d

v μ

1&465

Nm,#r

ρ


R 2 * 

m$,s m m m,s

 /

0.00 1.!5 1.$ 1.7!C10:5

2e /

1.789:05



0.015 00 0.000075

mm mm

'rom


eet


0.001 : 0.00

$.$$ : 6.7 10:6


0.0015 : 0.007

0.5 : .$$ 10:5


0.005

1.7 10:5

Stainless steel

0.015

5 10:5


0.045 : 0.0!

1.5 : $ 10 :4

Stret"#e* steel

0.015

5 10:5

?el* steel

0.045

1.5 10:4

0.15

5 10:4


0.15 : 4

5 : 1$$ 10 :4

New "ast iron

0.5 : 0.8

8 : 7 10 :4

?orn "ast iron

0.8 : 1.5

.7 : 5 10 :$

2usty "ast iron

1.5 : .5

5 : 8.$ 10 :$


0.01 : 0.015

$.$$ : 5 10:5

Smoot#e* "ement

0.$

1 10:$

r*inary "on"rete

0.$ : 1

1 : $.$$ 10:$

3oarse "on"rete

0.$ : 5

1 : 16.7 10:$

?ell plane* woo*

0.18 : 0.!

6 : $0 10 :4

r*inary woo*

5

16.7 10:$

+#ere%ore& R / 0.000075 Re / 1.789:05 #he $oody %rictor %actor Diagra!


) /

0.018


P"loss

=

) - l/d. -ρ v/.


 l   *

/ / / / /


 / l /  /  / * / P"loss

/

0.018 4 1.$ 1.!5 0.0

m ;,m$ m,s m

$8!.75

Pa


$8!.75

Pa

Calculation of Blower Air Pipe Pressure Loss(Ave)

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