Repeat Prob. 17€“72E, assuming that a 0.01-in-thick layer of mineral deposit (k = 0.5 Btu/h·ft·°F) has formed on the inner surface of the pipe.

Data from 17-72E

Steam exiting the turbine of a steam power plant at 100°F is to be condensed in a large condenser by cooling water flowing through copper pipes (k = 223 Btu/h·ft·°F) of inner diameter 0.4 in and outer diameter 0.6 in at an average temperature of 70°F. The heat of vaporization of water at 100°F is 1037 Btu/lbm. The heat transfer coefficients are 1500 Btu/h·ft2·°F on the steam side and 35 Btu/h·ft2·°F on the water side.

Transcribed Image Text:

Steam, 100°F 120 Ibm/h Cooling water Liquld water