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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• Depends on flow rate & available
• Too many/few tubes
• All tubes have standards
• Small diameter means larger pressuredrop
• Typical lengths – 8, 12, 15, 20 ft.
• Number of times fluid moves from one
• The more passes the greater the velocity
• Meeting requirements
• Thermal properties
because usually improves heat
velocity of fluid reduces build-up
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.