Example35.1 - Prof.Naik 2011 Example A steam power plant...

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Example Prof.Naik © 2011 A steam power plant operates on an ideal reheat Rankine cycle between the pressure limits of 15 MPa and 10 kPa. The mass flow rate of steam through the cycle is 12 kg/s. Steam enters both stages of the turbine at 500 C. The moisture content of the steam at the exit of the low-pressure turbine must not exceed 10%. » Sketch the cycle on T-s diagram. etermine the pressure (MPa) at which reheating occurs » Determine the pressure (MPa) at which reheating occurs. » What is the total rate of heat input (kW) in the boiler? ompute the thermal efficiency of the cycle » Compute the thermal efficiency of the cycle. » What is the back work ratio (%) of the cycle?
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Example (contd.) Prof.Naik © 2011 Assumptions teady state - Steady state - All devices internally reversible - For turbines (1-2s) and (3-4s) as well as pump (5-6s) no heat transfer - For main boiler (6s-1), reheat (2s-3) and condenser (4s-5) no work - Neglect KE and PE changes in all e devices the devices  in out dE QW m h h K E P E dt
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This note was uploaded on 09/09/2011 for the course ME 200 taught by Professor Gal during the Spring '08 term at Purdue University-West Lafayette.

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Example35.1 - Prof.Naik 2011 Example A steam power plant...

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