1. Che 451 chemical engineering design i HEAT EXCHANGER DESIGN
Prof. Dr. Bekir Zühtü UYSAL
Res. Asist. Melda ESKİTOROS
EMRE AKASLAN

2. index AIM PROPERTIES OF ETHYLENE GLYCOL AND WATER
CHOSEN HEAT EXCHANGER
TUBE PROPERTIES
BAFFLES
TUBE SIDE AND SHELL SIDE
OPTIMUM TEMPERATURE RESULTS
ECONOMIC RESULTS
CHEMCAD RESULTS

3. AIM:
THE AIM IS COOLING ETHYLENE GLYCOL 100 TO 50 OC FOR USING DEHIDRATION OF NATURAL GAS. SO A HEAT EXCHANGER DESIGNED FOR COOLING ETHYLENE GLYCOL.

4. Properties of ethylene glycol at 75 degrees
Ethylene Glycol Properties at 75 Degrees
Molecular Weight (g/mol)
62,07
Tin (Celcius)
100
Viscosity (kg/ms)
0,003448
Tout (Celcius) 50
Cp (kj/kgK)
2,6603
Density (kg/m3)
1073,6709
m (kg/s) 26
Prandtl Number
35,
Thermal Conductivity (W/mK)
0,2589

5. Properties of water at 42 degrees
Water Properties at 41 Degree
Molecular Weight (g/mol)
18,02
Tin (Celcius) 30
Viscosity (kg/ms) 0,
Tout (Celcius) 45
Cp (kj/kgK)
4,1797
Density (kg/m3)
992,8834
m (kg/s)
Prandtl Number
4,775074
Thermal Conductivity (W/mK)
0,6227

6. Why shell and tube heat exchanger
LARGE SURFACE AREA
MECHANİCAL LAYOUT
SHAPE FOR PRESSURE OPERATİON
FABRİCATİON TECHNİQUES
EASİLY CLEANED

9. Tube Material: Carbon Steel
Tube properties
Tube Properties
Size
3/4''
OD (m)
0,01905
BWG 16
ID (m)
0,01575 Xw
0,00165
Length (m)
4,8768
Tube Material: Carbon Steel
kw (W/mK) 45

10. TUBE PATTERNS
SELECTED PATTERN

11. Baffles

12. Fluid Allocation SHEEL OR TUBE SIDE
CORROSION
FOULING
FLUID TEMPERATURES
OPERATING PRESSURES
PRESSURE DROP
VISCOSITY
STREAM FLOW-RATES

13. Optimum temperature results
Optimum Water Outlet Temperature: 51 oC
Optimum Water Mass Flow Rate: 39,4 kg/s
Optimum Heat Exchanger Area: 271,8 m2
Number of Actual Tubes: 745
Inside Fluid Film Coefficient: 1878,6 W/m2.oC
Outside Fluid Film Coefficient: 816,7 W/m2.oC
Overall Coefficient Based on the Outside Area of Tube, Assumed: 400 W/m2.oC
Overall Coefficient Based on the Outside Area of Tube, Calculated: 425,5 W/m2.oC
Heat Duty (Required): 3458,4 kW
Heat Duty (Calculated): 3742,5 kW

14. Qcal/Qreq Ratio:1,08 (Acceptable)
Pressure Drop at Tube Side: 0,73 kPa
Power of Pump at Tube Side: 0,039 kW
Pressure Drop at Shell Side: 4,8 kPa
Power of Pump at Shell Side: 0,154 kW
PEC for Heat Exchanger: TL
Total Electric Cost: 464 TL/yr
Water Cost: TL/yr
Direct Cost: TL
Indirect Cost: TL
Fixed Capital Invesment: TL
Total Annual Cost: TL/yr

15. Economic results

16. Chemcad calculations

17. CHEMCAD CALCULATIONS
26% ERROR
1.8% ERROR

18. THANKS FOR YOUR ATTENTION