Htfs
Htfs
Htfs
Shell&Tube V8.4
Page 1
Printed: 9/30/2014 at 11:13:20 AM
Input for Str.1 Liq.viscosity, 53277.35 mPa*s is beyond the expected range, from 0.01 mPa*s to
1000 mPa*s
1121
Input for Str.1 Liq.viscosity, 21752.67 mPa*s is beyond the expected range, from 0.01 mPa*s to
1000 mPa*s
1128
A further 4 similar warnings for Str.1 Liq.viscosity are omitted for clarity.
1121
Input for Str.2 Liq.density, 177.68 kg/m3 is beyond the expected range, from 200 kg/m3 to 3000
kg/m3
1816
P21: Stream 2 at pressure 91.00997 bar has an unusual value of compressibility, 0.3144747,
(calculated from vapor data at the dew point) and/or of molecular weight 16.65921. This may
affect the accuracy of the calculated results.
1816
P21: Stream 2 at pressure 89.18982 bar has an unusual value of compressibility, 0.3166472,
(calculated from vapor data at the dew point) and/or of molecular weight 16.65921. This may
affect the accuracy of the calculated results.
1826
P57: The dew (or bubble) points for Stream 2 at pressure levels 1 and 2 indicate a lower
temperature at the higher pressure. This is unusual, though not impossible. Check the Physical
Properties Temperature-Enthalpy-Quality data for this stream. Note. This message can apply to
an extrapolated (effective) bubble or dew point. If so, and there are no obvious inconsistencies
in the T-h-x data, the message can be ignored.
1860
The consolidated process conditions for Stream 1, prior to the main calculations, give a heat
load of -53473 kW, for a flow of 1537.683 kg/s, with outlet temperature 6 C and quality (vapor
mass fraction) 0.
1860
The consolidated process conditions for Stream 2, prior to the main calculations, give a heat
load of 53473 kW, for a flow of 85.3056 kg/s, with outlet temperature 2 C and quality (vapor
mass fraction) 1.
1446
1701
1611
The HTFS flow induced vibration analysis has identified possible or serious problems in one or
more areas: Fluid Elastic Instability: 5 warnings, of which 2 serious; Resonance Assessments:
6 warnings, of which 3 serious.
1661
There is an unsupported straight tube span of 2068.52 mm which exceeds the TEMA maximum
unsupported straight tube span of 1524 mm.
1902
The number of baffles 2 in a shellside flow path is small. Some of the assumptions in the
Shell&Tube thermal model and temperature difference calculation are less valid than normal.
1903
The ratio 2.418431 of an end space length to the baffle space is larger than normal. Shellside
heat transfer and pressure drop calculations may be less accurate than normal, especially if
there is a small number of baffles. Note that the fraction of the overall resistance to heat
transfer due to the shellside is 0.1385429.
1913
There is a risk of phase separation in a tubeside header. The effects of phase separation are not
included in the thermal model.
Shell&Tube V8.4
Page 2
Optimization Path
Shell
Tube Length
Units
Total
Price
2294
Dollar(US)
1594535 Near
2413
1663130 Near
3223
2243910 (OK )
3405
2366675 Near
666.75
3324
2325130 (OK )
0.25
660.4
3517
2460935 Near
0.01416
0.71
660.4
3432
2383630 (OK )
1.44 *
0.00484
0.24
660.4
3637
2542435 Near
0.24008
0.93
0.01345
0.67
660.4
3554
2464905 (OK )
1.14
0.36561
1.41 *
0.00471
0.24
654.05
3764
2616825 Near
4783.3
1.15
0.35698
1.38 *
0.00461
0.23
647.7
3875
2699260 Near
5486.4
4681.8
1.17
0.38037
1.47 *
0.00444
0.22
558.8
4111
2866260 Near
1828.8
4876.8
4854.9
0.24191
0.94
0.0042
0.21
419.1
4255
2919890 (OK )
14
1854.2
4876.8
4815.8
1.01
0.24034
0.93
0.00412
0.21
419.1
4393
3018005 (OK )
15
1879.6
4876.8
4787
1.02
0.23456
0.91
0.00406
0.2
419.1
4512
3094860 (OK )
16
1905
4876.8
4754.9
1.03
0.23213
0.9
0.00399
0.2
419.1
4658
3194565 (OK )
17
1320.8
3657.6
4051.5
0.9 *
0.28417
1.1 *
0.02368
1.18 *
463.55
2051
1676880 Near
18
1346.2
3657.6
3988.4
0.92 *
0.20475
0.79
0.02163
1.08 *
609.6
2160
1751016 Near
19
1371.6
3657.6
3924.2
0.93 *
0.21879
0.85
0.02049
1.02 *
609.6
2232
1815876 Near
20
1397
3657.6
3870.6
0.94 *
0.21069
0.81
0.01892
0.95
603.25
2344
1889316 Near
21
1422.4
5486.4
5116.2
1.07
0.35243
1.36 *
0.00541
0.27
603.25
2531
2045274 Near
22
1422.4
4267.2
3724.6
1.15
0.18018
0.7
0.01925
0.96
603.25
2461
2001774 (OK )
23
1676.4
5486.4
4601.7
1.19
0.27733
1.07 *
0.0041
0.21
679.45
3567
2960922 Near
24
1701.8
5486.4
4565.8
1.2
0.2773
1.07 *
0.00402
0.2
679.45
3681
3057450 Near
25
1727.2
5486.4
4487.1
1.22
0.32598
1.26 *
0.00395
0.2
558.8
3793
3134940 Near
26
1752.6
5486.4
4445.2
1.23
0.31845
1.23 *
0.00387
0.19
558.8
3923
3237798 Near
27
1778
4876.8
4436.3
1.1
0.27422
1.06 *
0.00371
0.19
666.75
4015
3292200 Near
28
1803.4
5486.4
4405.7
1.25
0.2394
0.93
0.00374
0.19
660.4
4161
3457194 (OK )
29
1828.8
4876.8
4557.4
1.07
0.18992
0.73
0.00357
0.18
419.1
4301
3510750 (OK )
30
1193.8
4267.2
4047.6
1.05
0.30768
1.19 *
0.02902
1.45 *
419.1
1659
1582707 Near
31
1219.2
4876.8
3835.5
1.27
0.26878
1.04 *
0.02937
1.47 *
647.7
1727
1687644 Near
32
1244.6
4876.8
3806.2
1.28
0.29848
1.15 *
0.02727
1.36 *
558.8
1808
1750707 Near
33
1270
3657.6
3915.2
0.93 *
0.16387
0.63
0.02065
1.03 *
641.35
1925
1785224 Near
34
1295.4
3657.6
3844.3
0.95 *
0.1711
0.66
0.0197
0.98
635
1985
1857023 Near
35
1320.8
3657.6
3772.4
0.97 *
0.17049
0.66
0.018
0.9
635
2095
1954568 Near
36
1346.2
3657.6
3689.1
0.99 *
0.167
0.65
0.01704
0.85
628.65
2185
2037070 Near
37
1371.6
3657.6
3666.7
1*
0.16407
0.63
0.01584
0.79
628.65
2276
2116331 Near
38
1397
3657.6
3596.9
1.02
0.15758
0.61
0.01479
0.74
622.3
2386
2201255 (OK )
39
1422.4
3657.6
3540.2
1.03
0.17114
0.66
0.0139
0.7
615.95
2486
2291968 (OK )
40
1447.8
3657.6
3492.1
1.05
0.17107
0.66
0.01325
0.66
527.05
2574
2381351 (OK )
41
1473.2
3657.6
3440.9
1.06
0.18713
0.72
0.01253
0.63
520.7
2681
2471476 (OK )
42
1473.2
3048
2963.6
1.03
0.23018
0.89
0.02934
1.47 *
520.7
2628
2421391 Near
22
1422.4
4267.2
3724.6
1.15
0.18018
0.7
0.01925
0.96
603.25
2461
2001774 (OK )
Item
Size
Actual
Reqd.
mm
1397
mm
4267.2
mm
4168.8
1422.4
4267.2
1625.6
4267.2
1651
Pressure Drop
Area
ratio
Baffle
Tube
Shell
Dp Ratio
Tube
Dp Ratio
Pitch
1.02
bar
0.23985
0.93
bar
0.02931
1.47 *
mm
590.55
4053.6
1.05
0.23743
0.92
0.02717
1.36 *
584.2
3603.6
1.18
0.24012
0.93
0.01712
0.86
558.8
5486.4
5002.4
1.1
0.38304
1.48 *
0.00508
0.25
666.75
1651
4267.2
3568.4
1.2
0.20415
0.79
0.01629
0.81
1676.4
5486.4
4909
1.12
0.3731
1.44 *
0.00497
1676.4
3657.6
3621.5
1.01
0.23992
0.93
1701.8
5486.4
4861
1.13
0.37187
1701.8
3657.6
3602.3
1.02
10
1727.2
5486.4
4821.9
11
1752.6
5486.4
12
1803.4
13
Design
Status
Shell&Tube V8.4
Recap of Designs
Shell size
mm
A
1422.4
mm
4267.2
mm
3724.6
Pressure drop, SS
Pressure drop, TS
bar 0.18018
bar 0.01925
Baffle spacing
mm
603.25
2
Number of baffles
Tube passes
Tube number
2461
Total price
Program mode
Calculation method
Area Ratio (dirty)
Dollar(US) 2001774
Design
(Sizing)
Advanced
method
1.15
W/(m K)
2598
W/(m K)
568.1
Heat load
Recap case fully recoverable
Page 3
kW 53472.8
Yes
Size
1422.4 -- 4267.2
Surf/unit(eff.)
3111.6
Fluid allocation
Fluid name
Fluid quantity, Total
Vapor (In/Out)
Liquid
Noncondensable
mm
m
Type AES
Connected in
Hor
6 parallel
1 series
Shells/unit 6
Surf/shell (eff.)
518.6
m
PERFORMANCE OF ONE UNIT
Shell Side
Tube Side
kg/h
kg/s
kg/s
kg/s
Temperature (In/Out)
Dew / Bubble point
Density
Vapor/Liquid
Viscosity
Molecular wt, Vap
Molecular wt, NC
Specific heat
Thermal conductivity
Latent heat
Pressure (abs)
Velocity
Pressure drop, allow./calc.
C
C
kg/m
mPa s
5535659
0
0
1537.683
1537.683
0
0
16
1051.87
3.2336
307100
0
85.3056
0
6
1056.51
4.8908
85.3056
0
0
-136.8
2
-77.86
-78.86
396.87 86.03
0.0736 0.0135
16.66
3.501
3.454
3.436
3.149
kJ/(kg K)
0.4492
0.4474
0.1406 0.0303
W/(m K)
20.9
kJ/kg
20.9
2.816
2.63582
91.01
90.99075
bar
1.13
1.37
m/s
0.25855
0.18018
0.02
0.01925
bar
Fouling resistance (min)
0.00042 Ao based
0.00018
0.00035
m K/W
Heat exchanged
MTD corrected
53472.8
54.7
kW
C
Transfer rate, Service
Dirty
Clean 459
314.2
359.9
W/(m K)
CONSTRUCTION OF ONE SHELL
Sketch
Shell Side
Tube Side
Design/vac/test pressure:g
100.6635
bar 3.44738
Design temperature
54.44
37.78
C
Number passes per shell
1
4
Corrosion allowance
3.18
3.18
mm
Connections
In
508
1
254
mm 1
1
508
Size/rating
Out
1
304.8
Nominal
Intermediate
Tube No.
OD 19.05
Tks-Avg 1.6
Length 4267.2
2461
mm
mm Pitch 23.81
mm
Tube type Plain
Tube pattern
30
#/m Material Carbon Steel
Shell Carbon Steel
ID 1422.4
OD 1447.8
Carbon Steel
mm Shell cover
Channel or bonnet
Channel cover
Carbon Steel
Carbon Steel
Tubesheet-stationary Carbon Steel
Tubesheet-floating
Carbon Steel
Floating head cover Carbon Steel
Impingement protection None
Baffle-cross
Type Single segmental
Cut(%d) 29.92
Carbon Steel
H Spacing: c/c 603.25
mm
mm
Baffle-long
Seal type
Inlet
1458.92
0
Supports-tube
U-bend
Type
T2
T1
Bypass seal
Expansion joint
RhoV2-Inlet nozzle
Gaskets - Shell side
Floating head
Code requirements
Weight/Shell
Remarks
Tube-tubesheet joint
Type None
Bundle entrance 434
1771
Tube Side
Flat Metal Jacket Fibe
Flat Metal Jacket Fibe
ASME Code Sec VIII Div 1
Filled with water 54307
45706.4
S1
S2
Exp. 2 grv
Bundle exit 474
Flat Metal Jacket Fibe
TEMA class
Bundle
kg/(m s)
R - refinery service
12388.5
kg
Shell&Tube V8.4
Size
1422.4 x 4267.2
Surf/Unit (gross/eff/finned)
Surf/Shell (gross/eff/finned)
mm
3770.9 /
628.5 /
Type
AES
3111.6 /
518.6 /
Design (Sizing)
Process Data
Total flow
Vapor
Liquid
Noncondensable
Cond./Evap.
Temperature
Dew / Bubble point
Quality
Pressure (abs)
DeltaP allow/cal
Velocity
kg/h
kg/s
kg/s
kg/s
C
C
Shell Side
In
Out
5535659
0
0
1537.683 1537.683
0
0
16
6
0
bar 2.816
bar 0.25855
m/s
1.13
Liquid Properties
Density
kg/m 1051.87
Viscosity
mPa s 3.2336
Specific heat
kJ/(kg K) 3.501
Therm. cond.
W/(m K) 0.4492
Surface tension
N/m
Molecular weight
25.15
Vapor Properties
Density
kg/m
Viscosity
mPa s
Specific heat
kJ/(kg K)
Therm. cond.
W/(m K)
Molecular weight
Two-Phase Properties
Latent heat
kJ/kg
Heat Transfer Parameters
Reynolds No. vapor
Reynolds No. liquid
6980.68
Prandtl No. vapor
Prandtl No. liquid
25.2
Heat Load
Vapor only
2-Phase vapor
Latent heat
2-Phase liquid
Liquid only
Tubes
Type
ID/OD
mm
Length act/eff
mm
Tube passes
Tube No.
Tube pattern
Tube pitch
mm
Insert
Vibration problem
0
2.63582
0.18018
1.12
Hor
25.15
16.66
86.03
0.0135
3.149
0.0303
16.66
20.9
20.9
139208.1
Plain
15.85 / 19.05
4267.2 / 3521.1
4
2461
30
23.81
None
Yes / No
6 parallel
6
396.87
0.0736
3.436
0.1406
37.76
kW
0
0
0
0
-53472.8
Connected in
Shells/unit
m
m
1056.51
4.8908
3.454
0.4474
4615.36
Page 5
25602.82
1.4
1.8
kW
33098.6
45.4
359.2
46.1
19923.4
Baffles
Type
Single segmental
Number
2
Cut(%d)
29.92
Cut orientation
H
Spacing: c/c
mm 603.25
Spacing at inlet
mm 1458.92
Spacing at outlet
mm 1458.92
1 series
53472.8
54.7 / 59.1
1.15 / 1.46
m K/W
0.00278
0.00218
0.00176
0.00042
0.00003
0.00018
0.00038
63.35
15.24
1.21
6.34
13.85
bar
0.01467
0.03657
0.06965
0.00552
0.03994
0.01385
%
8.14
20.29
38.64
3.06
22.16
7.69
bar
0.0012
0.00116
0.01214
0.0021
0.00136
%
6.66
6.47
67.59
11.68
7.59
m/s
1.3
kg/(m s)
1771
1.13
1.01
1.12
1.01
1.29
1763
m/s
0.77
kg/(m s)
237
0.3
1.37
2.52
547
Nozzles: (No./OD)
Shell Side
Inlet
mm
1 / 508
Outlet
1 / 508
Other
/
Impingement protection
RhoV2 violation
Tube Side
1 / 273.05
1 / 323.85
/
None
No