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Unformatted text preview: values, and appropriate lines of constant pressure. SP34: Consider a coal-fired steam power plant that produces 300 MW of electricity and the electric generator has an efficiency of 96%. The power plant operates on the ideal Rankine cycle in which steam enters the turbine at 6 MPa and 440 C and the condenser pressure is 30 kPa. Assume that coal has a heating value (energy released when fuel is burned) of 29,300 kJ/kg and that 75% of the energy from coal is transferred to the steam in the boiler. (a) Calculate the required mass flow rate (kg/s) of coal. (b) Determine the overall plant efficiency (%) which represents the electricity generated divided by the rate of energy input from the coal. (c) Show the cycle on T-s diagram. Label the states, show property values, and appropriate lines of constant pressure....
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- Fall '08