2. • What's heat exchanger & parts of it.
• Classification & types of heat exchanger .
• Shell & tubes heat exchanger .
3. the Classification
We can classify heat exchangers in a according :
• Connecting technique .
• Number of fluids .
• Degree of surface compactness.
• Construction.
• Flow arrangements .
• Heat transfer mechanism.
6. The types
• Regenerative heat exchanger :is a type of heat
exchanger where heat from the hot fluid is
intermittently stored in a thermal storage medium
before it is transferred to the cold fluid
7. The types
• Plates heat exchanger: is a type of heat
exchanger that uses metal plates to transfer
heat between two fluids.
• this type generally consists of Plates, gaskets,
frames & instrument flanges as shown in the
next fig.
9. Shell &Tube heat exchangers
• It is the most common type of heat exchanger
in oil refineries and other large chemical
processes .
• It is suited for higher pressure applications .
11. the tubes
• The selection of tubes characteristics is very
important and these characteristics:
-Tube shape
-Number of tube
• The number of tubes depends on the rate of
fluid flow and flow velocity.
-Tube length
• The length of the tubes has a direct effect on the
rate of heat transfer and efficiency of cleaning .
12. the tubes
• -Tube diameter
• The diameter of the tubes has a significant impact
on:
1- Rate of heat transfer
2- Efficiency of exchanger
3- capability of cleaning tubes
• -Tube thickness
• The tube selection depends on avoid corrosion in
tubes , resistance required and the cost .
13. Shell
The metal of shell is made of Ordinary iron or
alloy resistance to corrosion or iron covered
with corrosion resistant materials
Baffles
A baffles are placed within the shell of the
heat exchanger firstly to support the tubes
preventing tube vibration and sagging and
secondly to direct the flow to have a higher
heat transfer coefficient .the distance
between two baffles is baffle spacing
14. Thank you for your attention
BY:
ALI HADI
SALLMA M.H
HAIDAR YAHYA
ALLA KADIM
