Steam enters a horizontal 15-cm-diameter pipe as a saturatedvapor at 5 bar with a velocity of 10 m/s and exits at 4.5 bar witha quality of 95%. Heat transfer from the pipe to the surroundingsat 300K takes place at an average outer surface temperature of 400K. For operation at steady state, determine
(a) the velocity at the exit, in m/s.
(b) the rate of heat transfer from the pipe, inkW.
(c) the rate of entropy production, in kW/K,for a control volume comprising only the pipe and its contents.
(d) the rate of entropy production, in kW/K,for an enlarged control volume that includes the pipe and enough ofits immediate surroundings so that heat transfer from the controlvolume occurs at 300 K.
