Consider a cogeneration plant that uses an ideal Rankine cycle to generate power and steam for process heating, as shown in the figure. The plant provides 4.5 MW of net power output and 5.8 MW of process heating. Steam is supplied to the inlet of the two- stage turbine at 10 MPa and 440°C. A portion of the steam is extracted after exiting the high pressure turbine at 0.5 MPa and is used to meet the process heating load. The steam leaves the process heater as a saturated liquid and mixes with the water leaving the low-pressure pump. Saturated liquid water enters the low-pressure pump at 20 kPa. a. Sketch this cycle on a T-s diagram. b. Determine the mass flow rate of water extracted for process heating, in kg/s. c. Determine the power developed by the turbines, in kw. d. Determine the power input to the pumps, in kW. e. Determine the rate of heat transfer to the water in the steam generator, in kw. f. Determine the net power output of the system, in kW.

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Applied Fluid Mechanics

A fluid is a substance that is continuously deformed by the application of shear stress. The rate of deformation of a fluid depends on its viscosity. The fluid tries to flow when it interacts with some other system.