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Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN: 9781259696527
Author: J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher: McGraw-Hill Education
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![4.
AT
Tz)
T-7)
DUE 9/2. Calculate the overall heat-transfer coefficient based on both inside and outside areas for the
following cases. All individual coefficients are given in usual units.
tube
Case 1. Water at 50 °F flowing in a 3/4-in. 16 BWG condenser tube at a velocity of 15 ft/s and saturated steam
at 220 °F condensing on the outside. h, 2,150; h.-2,500; km=69.
Case 2. Benzene condensing at atmospheric pressure on the outside of a 25-mm steel pipe and air at 15 °C
flowing within at 6 m/s. The pipe wall is 3.5 mm thick. h;-30 W/m²-°C; h.-1,200 W/m²-°C; k=45 W/m-°C.
Case 3. Dropwise condensation from steam at a pressure of 50 lb/in.² gage on a Schedule 40 1-in. steel pipe
carrying oil at a velocity of 3 ft/s. h=130; ho=14,300; km-26.
convection
+
inside](https://content.bartleby.com/qna-images/question/715d46fc-e3b2-4532-8a78-d41910cc73a8/58d787fc-fefb-4c69-af73-829cc6af45ac/yccbmj_thumbnail.jpeg)
Transcribed Image Text:4.
AT
Tz)
T-7)
DUE 9/2. Calculate the overall heat-transfer coefficient based on both inside and outside areas for the
following cases. All individual coefficients are given in usual units.
tube
Case 1. Water at 50 °F flowing in a 3/4-in. 16 BWG condenser tube at a velocity of 15 ft/s and saturated steam
at 220 °F condensing on the outside. h, 2,150; h.-2,500; km=69.
Case 2. Benzene condensing at atmospheric pressure on the outside of a 25-mm steel pipe and air at 15 °C
flowing within at 6 m/s. The pipe wall is 3.5 mm thick. h;-30 W/m²-°C; h.-1,200 W/m²-°C; k=45 W/m-°C.
Case 3. Dropwise condensation from steam at a pressure of 50 lb/in.² gage on a Schedule 40 1-in. steel pipe
carrying oil at a velocity of 3 ft/s. h=130; ho=14,300; km-26.
convection
+
inside
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