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DESIGN OF SHELL AND TUBE HEAT EXCHANGER. BY-RAHUL OMAR 0616651020 B.TECH.F(CH). Heat Exchanger Includes. Shell Tubes Working fluids. Heat Exchanger Shell. More expensive to manufacture than tubes Material. Heat Exchanger Tubes. Number of tubes Tube wall thickness

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design of shell and tube heat exchanger

DESIGN OF SHELL AND TUBE HEAT EXCHANGER

BY-RAHUL OMAR

0616651020

B.TECH.F(CH)

heat exchanger includes
Heat Exchanger Includes
  • Shell
  • Tubes
  • Working fluids
heat exchanger shell
Heat Exchanger Shell
  • More expensive to manufacture than

tubes

  • Material
heat exchanger tubes
Heat Exchanger Tubes
  • Number of tubes
  • Tube wall thickness
  • Tube outside diameter
  • Tube length
  • Tube passes
  • Tube material
  • Tube layout
  • Tube pitch
heat exchanger tubes1
Heat Exchanger Tubes
  • Number of tubes

• Depends on flow rate & available

pressure drop

• Too many/few tubes

  • Tube wall thickness

• All tubes have standards

  • Tube outside diameter

• Small diameter means larger pressuredrop

slide6
Tube length

• Typical lengths – 8, 12, 15, 20 ft.

  • Tube passes

• Number of times fluid moves from one

  • side of HE to other

• The more passes the greater the velocity

slide7
Tube material

• Meeting requirements

• Cost

• Thermal properties

  • Tube layout

• Square

  • Tube pitch
heat exchangers fluids
Heat Exchangers Fluids
  • Viscous fluids belong on shell side

because usually improves heat

transfer rate

  • Fouling and erosion exist; higher

velocity of fluid reduces build-up

problem statement
Problem Statement

4500kg/hr of ammonia vapour at 6.7 bar pressure is to be cooled from 1200C to 400C, using cooling water.The maximum supply temp. of cooling water available is 300C &the outlet temp. is to be restricted to 400C.The pressure drop over the exchanger must not exceed 0.5 bar for the ammonia stream & 1.5 bar for the cooling water.