3-78E 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. Determine the length of the tube required to con- dense steam at a rate of 120 lbm/h. Answer: 1148 ft

3-78E 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. Determine the length of the tube required to con- dense steam at a rate of 120 lbm/h. Answer: 1148 ft

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.

Question

3-78E 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. Determine the length of the tube required to con-
dense steam at a rate of 120 lbm/h. Answer: 1148 ft
Steam, 100°F
120 lbm/h
Liquid water
FIGURE P3-78E
Cooling
water

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