1. Heat Exchangers
This is session 19 in curriculum manual

2. Today’s Agenda Purpose of Heat Exchangers
Three Methods of Temperature Transfer
Primary Parts
Operation of Heat Exchanger
Applications
Hazards

3. Purpose of Heat Exchangers
Transfer heat
Increase production
Prevent thermal shock
Safety
Prevent overheating

4. Heat Exchange may serve to:
Increase production (pre-heater on reactor)
Prevent thermal shock (pre-heater on distillation column)
Change phase (cool vapor to condense it, or heat a liquid to vaporize it)
Prevent overheating of a process fluid
Recover “waste” heat for useful purposes

5. Applications of Tube and Shell Exchangers
Reboiler
Forced feed
Thermosiphon
Heater/preheater
Aftercooler
Condenser
Chiller
Interchanger

6. Three Methods of Temperature Transfer
Convection
Conduction
Radiation
Convection and conduction is mostly what occurs in HE

7. Parts of a Shell and Tube HE
Head
Shell
Tubes – plain or finned
Tube Sheet – keeps tube-side isolated from shell-side
Baffles – help w/ convection
Tie Rods – support tubes
Nozzles – shell and tube-side

8. Identify Primary Parts
Tube inlet and outlet
Shell inlet and outlet
Baffle
Exchanger head (channel type)
Tube bundle

9. Single Pass Counter Flow Exchanger

11. Operation of Tube and Shell Exchangers
Typical Tube and Shell Exchangers
Main Components

12. Hazards Personal Safety Environmental hazards Equipment
Head knockers (valves/pipes)
Goggles or faceshield when draining or venting
Contact w/ chemical hazards
Temp. hazards
Pressure hazards
Environmental hazards
Leaks
Equipment
Thermal shock
Fouling

13. Monitoring and Maintenance
Look
Listen
Feel

14. Heat Exchanger Hazards
Individual
Equipment
Production
Environment

15. Single Pass Shell/Tube Condenser

17. Tube Fins

18. Tube Bundle

19. U-Tube Bundle

20. Two Pass Floating Head Heat Exchanger

21. Kettle Type Reboiler

22. Multi Pass Floating Head Heat Exchanger

23. Heat Exchanger Symbols