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Design of Shell and Tube Heat Exchanger Crude oil at 198°C is to be cooled to...

Design of Shell and Tube Heat Exchanger
Crude oil at 198°C is to be cooled to 39°C. The oil flow-rate is 6.127 kg/s. Cooling water
is available at 29°C and at the rate of 27.127 kg/s. The pressure drop allowance for each stream
is 100 kN/m2
. Design a suitable shell and tube heat exchanger for this duty.

The following are the properties of the two streams at the average temperature:

water crude oil
density kg/m3 990 850

viscosity mNm-2 s

 0.680 0.18
thermal conductivity W/m K 0.630 0.130
specific heat kJ/ kg °K 4.2 2.3

Data:
Assume overall heat transfer coefficient of 502 W/m2 K.
Tubes: 20 mm o.d., 16 mm i.d. tubes, 4 m long, square pitch 1.25do, carbon steel.
Pull through head, Floating Head type heat exchanger.
Baffle = 1/5 of the shell diameter and 25 % cut baffles
Fouling factors 0.0003 m2 K/ W for cooling water and 0.0002 m2 K/ W for crude oil
Thermal conductivity of metal = 57 W/m K

Present your results with detailed calculations to design Shell and Tube Heat Exchanger. Mention the various assumptions made in the calculations.

Estimate the cost of the heat exchanger.

Solutions

Expert Solution

Amanda K answered 2 years ago
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