6. Consider a steam power plant that operates on a simple Rankine cycle and has a net power output of 210 MW. Steam ente

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6 Consider A Steam Power Plant That Operates On A Simple Rankine Cycle And Has A Net Power Output Of 210 Mw Steam Ente 1 (35.2 KiB) Viewed 27 times

6. Consider a steam power plant that operates on a simple Rankine cycle and has a net power output of 210 MW. Steam enters the turbine at 7MPa and 500°C and is cooled in the condenser at a pressure of 10 kPa by running cooling water from a lake. The temperature rise of the cooling water is 6°C. Isentropic efficiencies of turbine and pump are 85% and 80% respectively. Show the cycle on T-s and h-s diagrams, and determine (a) thermal efficiency of the cycle, (b) the mass flow rate of the steam and (c) the mass flow rate of the cooling water. Steam Properties: [5] [at, 7Mpa, 500°C, h=3410.3 kJ/kg, s-6.7974 kJ/kgK, and at, 10kpa (Tsat-45.81°C), he191.81 kJ/kg, hg= 2584.63 kJ/kg, ve-0.001010 m³/kg, st=0.6492 kJ/kgk and s-8.1501 kJ/kgK.]