1. Boiling and condensation
King Saud Universiy College of Engineering Chemical Engineering Deptment ChE 313 ChE 317 Heat Transfer Operations
Boiling and condensation

2. Boiling

4. Boiling

5. Film boiling

8. Example: Film boiling

9. Example: Film boiling

10. Example: Film boiling

12. King Saud University. ChE 313 College of Engineering
King Saud University ChE 313 College of Engineering Tutorial # 7 Chemical Engineering Dept /5/1431 Heat Transfer Operations Q1
Water is being boiled at 1 atm abs pressure in a jacketed kettle with steam condensing in the jacket at ºC. The inside diameter of the kettle is m and the height is m. The bottom is assumed to be flat. Both the bottom and the sides up to a height of m are jacketed. The kettle surface for heat transfer is 3.2-mm stainless steal with a k of W/m. K. Predict the boiling heat-transfer coefficient for the vertical jacketed sides of the kettle. Also predict the total heat transfer if the boiling heat-transfer coefficient for the bottom surface of the kettle is 2955 W/m2.K.
hsteam =10200W/m2K

13. King Saud University. ChE 317 College of Engineering
King Saud University ChE 317 College of Engineering Tutorial # 5 Chemical Engineering Dept Heat Transfer Operations Q2
steam saturated at 68.9 kPa (10 psia) is condensing on a vertical tube 1.22 m (4.0 ft) long having an OD of m (1.0 in.) and a surface temperature of ºC (187 ºF). Calculate the average heat-transfer-coefficient using English and SI units.