Unit 5 Assignment: Rankine Cycles 1: A simple ideal Rankine cycle which uses water as the working fluid operates its condenser at 30C and its boiler at 350C. Calculate the work produced by the turbine, the heat supplied in the boiler, and the thermal efficiency of this cycle when the steam enters the turbine without any superheating. Mass flow rate through the system is 250kg/s 'pump, in Pump gin Boiler Condenser Tout Turbine A Wturb.out 2: Consider a 300-MW steam power plant that operates on a simple ideal Rankine cycle. Steam enters the turbine at 10 MPa and 1000C and is cooled in the condenser at a pressure of 10 kPa. Show the cycle on a T-s diagram with respect to saturation lines, and determine (a) the quality of the steam at the turbine exit, (b) the thermal efficiency of the cycle, and (c) the mass flow rate of the steam. 3: Consider a coal-fired steam power plant that produces 275 MW of electric power. The power plant operates on a simple ideal Rankine cycle with turbine inlet conditions of 10 MPa and 550C and a condenser pressure of 15 kPa. The coal has a heating value (energy released when the fuel is burned) of 29,300 kJ/kg. Assuming that 85 percent of this energy is transferred to the steam in the boiler and that the electric generator has an efficiency of 96 percent, determine (a) the overall plant efficiency (the ratio of net electric power output to the energy input as fuel) and (b) the required rate of coal supply.