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CHAPTER 4 - HEAT EXCHANGER - Coggle Diagram
CHAPTER 4 - HEAT EXCHANGER
Types of Heat Exchanger
Double Pipe Heat Exchanger
Thermal resistance of the tube wall
Compact Heat Exchanger
Shell and Tube Heat Exchanger
Unfinned Shell & Tube Heat Exchanger
Plate & Frame Heat Exchanger
Counter-flow heat exchanger
Cross flow heat exchanger
Overall Heat Transfer Coefficient
-involve two flowing fluids.
heat is transferred
hot fluid to the wall by convection
convection to the wall or cold fluid
wall thickness of the tube is small and the thermal conductivity(Rwall=0) and the inner and outer surfaces of the tube are almost identical (Ai≈Ao≈As)
Total thermal resistance
Single resistance
Fouling Factor
Precipitation of solid
Corrosion & chemical fouling
Transfer rate to the cold fluid
Transfer rate to hot fluid
Log Mean Temperature Difference
temperature difference between hot & cold fluid varies along the heat exchanger.
NTU
Selection of heat exchanger
size and weight,
Type,
Materials,
miscellaneous
heat transfer rate
cost
pumping power,
