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?
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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Transcribed Image Text: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: h; = 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?
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