Example 3: A condenser using steam from the exhaust of a turbine at a pressure of 4 in Hg abs is to be used to heat 25000 Ib/h of seawater (Cp = 0.95 Btu/lb °F) from 60 °F to 110-°F. The condenser is to be sized for one shell pass and four tube passes; with 60 parallel tube of 0.995 in ID and 1.125 in OD brass tubing (k = 60 Btu/h ft °F). For the clean exchanger the average heat transfer coefficients at the steam and water-sides are 600 and 300 Btu/h fr’, respectively. Calculate the tube length required for long-term service. The fouling factors are 0.0005 h fr °F/Btu for both sides of the tubes.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Example 3: A condenser using steam from the exhaust of a turbine at a pressure of 4 in Hg abs
is to be used to heat 25000 Ib/h of seawater (Cp = 0.95 Btu/lb °F) from 60 °F to 110-°F. The
condenser is to be sized for one shell pass and four tube passes; with 60 parallel tube of 0.995
in ID and 1.125 in OD brass tubing (k = 60 Btu/h ft °F). For the clean exchanger the average
heat transfer coefficients at the steam and water-sides are 600 and 300 Btu/h ft’, respectively.
Calculate the tube length required for long-term service. The fouling factors are 0.0005 h ft²
°F/Btu for both sides of the tubes.
Transcribed Image Text:Example 3: A condenser using steam from the exhaust of a turbine at a pressure of 4 in Hg abs is to be used to heat 25000 Ib/h of seawater (Cp = 0.95 Btu/lb °F) from 60 °F to 110-°F. The condenser is to be sized for one shell pass and four tube passes; with 60 parallel tube of 0.995 in ID and 1.125 in OD brass tubing (k = 60 Btu/h ft °F). For the clean exchanger the average heat transfer coefficients at the steam and water-sides are 600 and 300 Btu/h ft’, respectively. Calculate the tube length required for long-term service. The fouling factors are 0.0005 h ft² °F/Btu for both sides of the tubes.
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