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Saturated water vapor leaves a steam turbine at a flow rate of 1.5 kg/s and a pressure of 0.51 bar. The vapor is to be completely condensed to saturated liquid in a shell-and-tube heat exchanger that uses city water as the cold fluid. The water enters the thin-walled tubes at 17°C and is to leave at 57°C. Assuming an overall heat transfer coefficient of 2000 W/m2 · K, determine the required heat exchanger surface area and the water flow rate. After extended operation, fouling causes the overall heat transfer coefficient to decrease to 1000 W/m2 · K, and to completely condense the vapor, there must be an attendant reduction in the vapor flow rate. For the same water inlet temperature and flow rate, what is the new vapor flow rate required for com- plete condensation?
a first class lever in static equilibrium has a 50lb resistance force and a 15lb effort force. the levers effort force is located 4ft from the fulcrum. what is the actual mechanical advantage of the system?
a steam turbine has an inlet pressure of 1200 kpa and temperature of 400 degc. the steam exits the turbine at a
How is the combined pump-motor efficiency of a pump and motor system defined? Can the combined pump-motor efficiency be greater than either the pump or the motor efficiency?
a which bearing has higher starting torque rolling element bearing or journal bearing? justify your answer.b when
we want to model the force of river water o some bridge support columns with a scale model in a wind tunnel. the actual
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globalization which causes the countries involved to become more interconnected clearly has tremendous social and
Determine the required length L of each splice if a factor of safety is 2.75.
consider an r-134a compressor on a refrigeration system. if the refrigerant enters as saturated vapor at 200 kpa 0.03
If the water enters at Tm,i = 500 K and the surface temperature of the tube is Ts = 510 K, determine the water outlet temperature Tm,o.
Which agency helps assure that all forms of transportation are operated safely by investigating transportation accidents and developing recommendations for other government agencies and transportation industries regarding transportation safety, tr..
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