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Tubular heater
Tubular heater
Dynamic
Shell and Tube Tubular Heater Design Calculation
Input Data (yellow colour cell)
S.no
Particulars
Values
UOM
1
Crushing rate
TCH
2
Juice % cane
%
3
Velocity of Juice
m/sec
4
Tube OD
mm
5
Tube Thickness
mm
6
Tube ID
mm
6
Tube length
mm
7
Specific heat of juice
Author:
Sp.heat of juice =1- 0.006Bx
Kcal/Kg/
^{o}
C
8
Legment
mm
9
vapour inlet temperature
^{o}
C
10
juice I/L temperature
^{o}
C
11
Juice o/l temperature
^{o}
C
12
Tube plate thickness
mm
13
Velocity of vapour
Author:
genarly taken for ex.25, 1st 30, 2nd 32.5, 3rd 35, 4th 40, 5th 45.7m/sec
m/sec
14
Heater Heating Surface
m
^{2}
15
Velocity of condensate
m/sec
16
Proportional factor
(
β)
Latent heat of vapour
kcal/Kg
Specific volume of vapour
M
^{3}
/kg
1
No. of tubes per pass
tubes/pass
i.e
2
No. of tubes
Author:
S=ΠDLN
i.e
no.s
3
No. of passes
Author:
=no.of tubes/tubes per pass
i.e
No. of passes i
s always taken even
As Per Even number of passes Heater
parameters
4
No. of compartments
5
Actual number of tubes
no.s
6
Actual heating surface
m
^{2}
7
Actual velocity
Author:
Q=AV
V=Q/(A x no. of tubes per passes)
m/sec
8
pressure drop across the juice heater
Formula:
=0.0025 x no.of pass x sq. of actual velocity x ((L/D) + 3)
MWC
9
Tube plate dia
Pitch
Author:
OD+legment+tube tolerance+hole tolerance
Tube plate Area
Author:
0.866 x (P)2 x no. of tubes / β
mtrs
Tube plate dia
Author:
Taken 20% extra for noxious gas withdrawal
mm
10
Dia of juice inlet pipe
mtrs
i.e
NB
11
Vapour inlet Dia
Author:
A = Q/V
mtrs
i.e
NB
12
Condensate pipe Dia
NB
i.e
Author:
For free removal condensate taken 50% extra
NB
13
NCG pipe line dia
Cross section area of pipe
Author:
For every 10m2 heating surface taken 1cm2 cross section area of NCG line
cm
^{2}
NCG pipe line dia
mm dia X
4no.
s withdrawals
Dynamic Tubular Heater Design Calculation
Input Data (yellow colour cell)
S.no
Particulars
Values
UOM
1
Crushing rate
TCH
2
Juice % cane
%
3
Velocity of Juice
m/sec
4
Tube OD
mm
5
Tube Thk
mm
6
Tube length
mm
7
Specific heat of juice
Author:
Sp.heat of juice =1- 0.006Bx
Kcal/Kg/
^{o}
C
8
Legment
mm
9
vapour I/L temperature
^{o}
C
10
juice I/L temperature
^{o}
C
11
Juice o/l temperature
^{o}
C
12
Tube plate thickness
mm
13
Velocity of vapour
Author:
genarly taken for ex.25, 1st 30, 2nd 32.5, 3rd 35, 4th 40, 5th 45.7m/sec
m/sec
14
Percent of vapour In Dynamic
%
15
Heating Surface
m
^{2}
16
proportional factor(
β)
17
Velocity of condensate
m/sec
Latent heat of vapour
kcal/Kg
Specific volume of vapour
M
^{3}
/kg
1
No. of tubes per pass
i.e
tubes/pass
2
No. of tubes
No. of tubes
Author:
S=ΠDLN
i.e
no.s
3
No. of passes
No. of passes
Author:
=no.of tubes/tubes per pass
i.e
No. of pass
es is always taken even
As Per Even number of passes
Heater parameters
4
No. of compartments
5
Actual no. of tubes
no.s
6
Actual heating surface
m
^{2}
7
Actual velocity
Author:
Q=AV
V=Q/(A x no. of tubes per passes)
m/sec
8
pressure drop across the juice heater
Formula:
=0.0025 x no.of pass x sq. of actual velocity x ((L/D) + 3)
MWC
9
Tube plate dia
Tube plate Area
Author:
0.866 x (P)2 x no. of tubes / β
mtrs
Tube plate dia
Author:
Taken 20% extra for noxious gas withdrawal
mm
10
Dia of juice inlet pipe
mtrs
i.e
NB
11
Vapour inlet Dia
Author:
A = Q/V
mtrs
i.e
NB
12
Vapour Outlet Dia
Author:
A = Q/V
mtrs
i.e
NB
13
Condensate pipe Dia
NB
i.e
Author:
For free removal condensate taken 50% extra
NB
14
NCG pipe line dia
Cross section area of pipe
Author:
For every 10m2 heating surface taken 1cm2 cross section area of NCG line
cm
^{2}
NCG pipe line dia
mm dia X
4
no.s withdrawals
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