ENGR 251 Final: ENGR 251 Final Exam 2009 Fall
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Return the exam paper with the answers" book. x. Consider a 210 mw steam power plant that operates on a simple rankine cycle. Steam enters the turbine at 10 mpa and 500 c and is cooled in the condenser at a pressure of 10 kpa. The isentropic efficiency for both the turbine and the pump is. A) show the cycle on a t-s diagram with respect to saturation lines. B) compute the thermal efficiency of the cycle. C) compute the mass flow rate of the steam. Mw, assuming both the compressor and the turbine have an isentropic efficiency of: (a) 100% and (b) 80%. The compression ratio of an ideal otto cycle is 8. At the onset of the compression stroke, the pressure is 0. 1 mpa and the temperature is 15 c. The heat supplied to air, per cycle, is 1800 kj/kg. A) the pressure, the specific volume and the temperature at each state.
