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Content Based Chemical Engineering

Heat Transfer in Jacketed Vessels Version 2.03a by Stephen M. Hall, PE Copyright 2001 [email protected] All cells are locked except user-defined data; unlock sheet from Tools menu (no password required) VIEW-COMMENTS to see some additional explanations.

Scroll down and to the right to enter data.

Project Data

Prepared by Date xx xx Client W.O. Unit Area Customary US SI Equip No xx xx xx xx xx

To restore a saved calculation, select it from the drop-down box below, then click the "Restore Saved Calculation" button

Temperature Conversion

Enter value to convert: 550 °F 270 °C = = 287.78 °C 518.00 °F

Vessel Data

Calc Title or Description Orientation Total working volume Inside diameter Tangent-to-tangent Heads Material of construction Thickness Lining Thickness Internal surface roughness Outside surface roughness Internal fouling factor Outside fouling factor (jacket) gallons inches inches Hemispherical Dished carbon steel inches Glass inches inches inches ft²-hr-°F/Btu ft²-hr-°F/Btu Tank is Baffled 0.06 0.000005 0.007 0 0.001 Prandtl Number 0.63 Pfaudler RT-32-100 Glass-Lined Reactor vertical vol to tangent 116.9 32 22.75 Properties from data table: Thermal Conductivity Specific Heat Density Viscosity 116.34 Temperature at jacket inlet Fluid name

Jacket Fluid Data

Dowtherm SR-1, 20 vol% °F 40.0 Name Bulk Temp

Vessel Fluid Data

Water °F 100.0

Btu/h-ft-°F Btu/lb-°F lb/ft³ cP lb/ft-h dimensionless

0.28 0.90 64.79 2.60 6.29 20.44

Thermal Conductivity Specific Heat Density Viscosity Viscosity at wall

Btu/h-ft-°F Btu/lb-°F lb/ft³ cP lb/ft-h cP lb/ft-h

0.36 0.99 62.12 0.68000 1.65 0.77833 1.88

Side-Wall Jacket

No Jacket Half-Pipe Coil Inlet/Outlet Nozzle Size Number of Zones Percentage of side-wall covered by jacket inches Conventional Dimple 4 1 1 Target velocity

Flow Rate in Side-Wall Jacket

Specify flow rate per zone Target velocity in jacket Target pressure drop ft/sec Use Experimental Pressure Drop Data Sidewall Bottom Head 10 Impeller Diameter Blade Height or Flight Pitch Blade Pitch (90 deg = upright) Number of blades Agitator Rotational Speed Impeller Type

Agitator Data

Glass-steel retreating

inches inches degress rpm

24 2 90 3 15

Page 1

Half-Pipe Coil Jacket Data Not Applicable Nominal Pipe Diameter Spacing between Coils inches inches 2 120 0.9843 Heat Transfer Coefficients From Vessel to Sidewall Jacket From Vessel to Bottom Jacket From Vessel to Coil Conventional Jacket Data Fluid Flow Annular space dimension Standard inches Baffled 1.37 Agit. Nozzles 1 0.625 2.36 Aiding flow (upflow during cooling/downflow during heating) Dimple Jacket Data Not Applicable Annular space dimension Longitudinal Transverse Mean dimple diameter Dimple pitch Triangular inches inches inches inches Square 0.1969 3.94 3.94 3.54 Center-to-center distance between adjacent dimples Temperature Effects Sidewall Jacket Bottom Jacket Internal Coil Vessel Contents Inlet 40.0 40.0 -100.0 Outlet 47.0 °F 0.0 °F -- °F °F Heat Transferred -31,296 Btu/hr Btu/hr -- Btu/hr Btu/hr Sidewall Jacket (each nozzle) Sidewall Jacket (combined) Bottom Jacket Nozzle Internal Coil Flow Rate 9.6 gal/min 9.6 gal/min 0.0 gal/min -- gal/min Velocity 10.0 ft/sec 10.0 ft/sec 10.0 ft/sec -- ft/sec Pressure Drop 1.6 psi 1.6 psi 1.6 psi -- psi hi 198 198 --

Quick Results

ho 76 76 -Overall U 33 Btu/ft²-hr-°F 33 Btu/ft²-hr-°F -- Btu/ft²-hr-°F

Cross section angle (180 or 120 deg)

Number of agitation nozzles per zone Throat diameter for each nozzle inches

Vessel contents will cool at a rate of 0.55 °F/minute

Bottom Head Jacket

No Jacket Half-Pipe Coil Conventional Dimple

Use this section when you have experimental pressure drop data

Input the known conditions Flowrate gal/min Sidewall (one zone) Bottom Head See the instruction manual for further information about the use of this pressure drop technique. Density lb/ft³ Pressure Drop psi

Same type as Side-Wall Jacket Series Flow Number of agitation nozzles on bottom Internal Coil No Coil Coil pipe size Length of coil Helical inches inches 2 672.1 Hairpin 0

Page 2

JACKETED VESSEL HEAT TRANSFER CLIENT xx REV PREPARED BY 0 xx xx 1 2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 DATE APPROVAL W.O. EQUIP. NO xx REQUISITION NO. PAGE SPECIFICATION NO. INSTALLED BY

xx UNIT AREA PROCURED BY xx xx Pfaudler RT-32-100 Glass-Lined Reactor Vessel Data vertical, cylindrical Contents 116 gallons Bulk Temperature 32 inches Thermal Conductivity 22.75 inches Specific Heat Hemispherical Dished Density carbon steel Viscosity 0.63 inches Glass Viscosity at wall 0.06 inches 0.0000 inches Agitator Type 0.0070 inches Impeller Diameter 0 ft²-hr-°F/Btu Speed 0.001 ft²-hr-°F/Btu Water

Orientation Total working volume Inside diameter Tangent-to-tangent Heads Material of construction Thickness Lining Thickness Internal surface roughness Outside surface roughness Internal fouling factor Outside fouling factor (jacket) Vessel is baffled

100 °F 0.36 Btu/h-ft-°F 0.99 Btu/lb-°F 62.12 lb/ft³ 0.68 cP 1.645 lb/ft-h 0.78 cP 1.883 lb/ft-h Glass-steel retreating 24 inches 15 rpm

Method for determining flow rate in jacket or coil: Target Velocity Value 10 ft/sec Pressure drop in sidewall determines flow in bottom jacket Dowtherm SR-1, 20 vol% Dow Chemical Co. Ethylene Glycol, water, and inhibitors Estimated vessel wall temp. 83 °F

Jacket Fluid Fluid Name Dowtherm SR-1, 20 vol% Temperature at jacket inlet 40 °F Thermal Conductivity 0.28 Btu/h-ft-°F Specific Heat 0.90 Btu/lb-°F Density 64.79 lb/ft³ Viscosity 2.60 cP 6.29 lb/ft-h Prandtl Number 20.44 dimensionless

Sidewall Jacket Type Bottom Jacket Type Internal Coil Type

Conventional Conventional No Coil

Jacket and Coil Data Annular space: 1.4 inches; 1 zones; opposing flow agitating nozzles Annular space: 1.4

Heat Transfer Coefficients From Vessel to Sidewall Jacket From Vessel to Bottom Jacket From Vessel to Coil Fluid Flow Sidewall Jacket (each nozzle) Sidewall Jacket (combined) Bottom Jacket Nozzle Internal Coil

Calculated Results hi hw 198 94 198 94 --Flow Rate 9.6 9.6 0.0 --

ho 76 76 -Velocity 10.0 10.0 10.0 --

Overall U 33 Btu/ft²-hr-°F 33 Btu/ft²-hr-°F -- Btu/ft²-hr-°F Pressure Drop 1.6 psi 1.6 psi 1.6 psi -- psi

gal/min gal/min gal/min gal/min

ft/sec ft/sec ft/sec ft/sec

Temperature Effects Inlet Outlet Sidewall Jacket 40.0 47.0 °F Bottom Jacket 40.0 0.0 °F Internal Coil --- °F Vessel Contents 100.0 °F Vessel contents will cool at a rate of 0.55 °F/minute

Heat Transferred -31,296 Btu/hr Btu/hr -- Btu/hr -31,296 Btu/hr

JACKETED VESSEL HEAT TRANSFER CLIENT xx REV PREPARED BY 0 xx xx 1 2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 DATE APPROVAL W.O. EQUIP. NO xx REQUISITION NO. PAGE SPECIFICATION NO. INSTALLED BY

xx UNIT AREA PROCURED BY xx xx Pfaudler RT-32-100 Glass-Lined Reactor Vessel Data vertical, cylindrical Contents 116.9 gallons Initial Temperature 32 inches Thermal Conductivity 22.75 inches Specific Heat Hemispherical Dished Density carbon steel Viscosity 0.63 inches Glass Viscosity at wall 0.06 inches 0.0000 inches Agitator Type 0.0070 inches Impeller Diameter 0 ft²-hr-°F/Btu Speed 0.001 ft²-hr-°F/Btu Water

Orientation Total working volume Inside diameter Tangent-to-tangent Heads Material of construction Thickness Lining Thickness Internal surface roughness Outside surface roughness Internal fouling factor Outside fouling factor (jacket) Vessel is baffled

100 °F 0.36 Btu/h-ft-°F 0.99 Btu/lb-°F 62.12 lb/ft³ 0.68 cP 1.645 lb/ft-h 0.78 cP 1.883 lb/ft-h Glass-steel retreating 24 inches 15 rpm

Method for determining flow rate in jacket or coil: Target Velocity Value 10 ft/sec

Jacket Fluid Fluid Name Dowtherm SR-1, 20 vol% Temperature at jacket inlet 40 °F Thermal Conductivity 0.28 Btu/h-ft-°F Specific Heat 0.90 Btu/lb-°F Pressure drop in sidewall determines flow in bottom jacket Density 64.79 lb/ft³ Viscosity 2.60 cP 6.29 lb/ft-h Estimated vessel wall temp. 83 °F Prandtl Number 20.44 dimensionless Jacket and Coil Data Annular space: 1.4 inches; 1 zones; opposing flow agitating nozzles Annular space: 1.4

Sidewall Jacket Type Bottom Jacket Type Internal Coil Type

Conventional Conventional No Coil

Timeline (calculated at 5-minute intervals)

120 100

Temperature

80 60 40 20 0 0 25 50 75 100 125 150 175 200 225 250 275 300 Time (minutes)

Information

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