A steam plant working on a simple rankine (2024)

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A steam plant working on a simple rankine cycle operated between the temperature of 260°C and 95°C. The steam is dry and saturated when it enters the turbine and expanded isentropic ally. Find rankine efficiency

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Consider a 210-MW steam power plant that operates on a simple Rankine cycle Steam enters the turbine at 10 MPa and 500degC and is cooled in the condenser at a pressure of 10 kPa Assuming an isentropic efficiency of 85 percent for both the turbine and the pumpShow 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 steamAnswered step-by-step 1 answerA steam power plant operates on a simple ideal Rankine cycle between the pressure limits of 3 MPa and 50 kPa The temperature of the steam at the turbine inlet is 300degC and the mass flow rate of steam through the cycle is 35 kg/s Show the cycle on a T-s diagram with respect to saturation lines and determineAnswered step-by-step 2 answersConsider a steam power plant that operates on a reheat Rankine cycle and has a net power output of 80 MW Steam enters the high-pressure turbine at 10 MPa and 500C and the low-pressure turbine at 1 MPa and 500C Steam leaves the condenser as a saturated liquid at a pressure of 10 kPa The isentropic efficiency of the turbine is 80 percent and that of the pump is 95 percent Determine the temperature of the steam at the turbine exitAnswered step-by-step 2 answers A steam power plant comprises of feed pump boiler steam turbine and condenser and other necessary components and instrumentation It can be assumed that the plant operates on a basic ideal Rankine cycle and the mass flow rate of the steam is (25+ ) kg / s The boiler operates at 30 bars The steam from the boiler leaves at (400+ ) C and enters the steam turbine Steam exhausts from the turbine 09 dry at a pressure of 1 bar a Show the plant layout of the power station and explain the principle of operation of the system Clearly indicate the energy exchanges that take place in each device b Discuss why steam is superheated at the entry to the turbine c Sketch a T-S diagram for the plant indicating the energy exchanges which take place d Show the boiler as a thermodynamic system and calculate the heat input stating all assumptions e Show the steam turbine as a thermodynamic system and determine the work output stating all assumptions f Show the condenser as a thermodynamic system and calculate the heat removed stating all assumptions g Determine the thermal efficiency of the plant and thus comment on performance characteristics of the plantAnswered step-by-step 1 answerConsider the combined gas ndashsteam power cycle shown in Fig 10 ndash26 The top ping cycle is a gas-turbine cycle that has a pressure ratio of 8 Air enters the compressor at 300 K and the turbine at 1300 K The isentropic efficiency of the compressor is 80 percent and that of the gas turbine is 85 percent The bottoming cycle is a simple ideal Rankine cycle operating between the pressure limits of 7 MPa and 5 kPa Steam is heated in a heat exchanger by the exhaust gases to a temperature of 5008C The exhaust gases leave the heat exchanger at 450 K Determine (a) the ratio of the mass flow rates of the steam and the combustion gases and (b) the thermal efficiency of the combined cycleAnswered step-by-step 1 answer

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A steam plant working on a simple rankine (2024)

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