#5 Heat Exchanger

Question 1

Cooler Examples

Answer 1

Jacket CW cooler, lubricating oil cooler,steam condenser

Question 2

Tubes

Answer 2

stack of parallel tubes inserted inside a cylinderical shell

on either end of tube bundle, tube ends are secured into the tube plates

tube plate in one end of the tube stack is secured between the cylinderical shell and water box, while other end is free to move

Question 3

Baffles

Answer 3

introduced between the plates

support the tubes

direct the flow of hot medium within tube stack

increase contact for heat transfer

Question 4

dwell time

Answer 4

duration of fluid present in the heat exchanger

Question 5

Advantages of Plate heat exchangers

Answer 5

Compact contruction with high heat transfer coefficient
Easy to dismantle for maintenance and inspections
Easy to increase or decrease heat transfer area by adding or removing plates respectively
Corrugations induce high turbulence, which reduce fouling

Question 6

Disadvantages of Plate heat exchangers

Answer 6

expensive