3. A hydrocarbon stream is to be cooled from 200°F to 130°F using 10,800 lb/h of water with a range of 75°F to 125°F. A double pipe heat exchanger comprised of 25 ft long carbon steel hairpins will be used. The inner and outer pipes are 1.5- and 3.5-in. schedule 40, respectively. The hydrocarbon will flow through the inner pipe and the heat-transfer coefficient for this stream has been determined: hi = 200 Btu/h ft².°F. Fouling factors of 0.001 h ft².°F/Btu for water and 0.002 h.ft².°F/Btu for the hydrocarbon are specified. How many hairpins will be required?

3. A hydrocarbon stream is to be cooled from 200°F to 130°F using 10,800 lb/h of water with a range of 75°F to 125°F. A double pipe heat exchanger comprised of 25 ft long carbon steel hairpins will be used. The inner and outer pipes are 1.5- and 3.5-in. schedule 40, respectively. The hydrocarbon will flow through the inner pipe and the heat-transfer coefficient for this stream has been determined: hi = 200 Btu/h ft².°F. Fouling factors of 0.001 h ft².°F/Btu for water and 0.002 h.ft².°F/Btu for the hydrocarbon are specified. How many hairpins will be required?

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter10: Heat Exchangers

Section: Chapter Questions

Problem 10.23P

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