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Question: the superheated steam at 40 bar and 500 c...

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The superheated steam at 40 bar and 500 ° C flows at a rate of 250 kg / min to an adiabatic turbine, where it expands to 5 bar. The turbine developed 1500 kW. From the turbine, steam flows to a heater, where it is reheated at constant pressure to its initial temperature. Appreciate changes in kinetic energy.

a) Write a power balance for the heater and use it to determine the required power supply (kW) to the steam.

b) Make a total energy balance of the two units process and determine the energy transfer in kW.

c) Assume that the turbine inlet and outlet pipes both have a diameter of 0.5 m. Demonstrate that it is reasonable to unprotect the change of kinetic energy.

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