SITUATIONAL PROBLEM NO IIIn a reheat cycle steam at 8.0MPA and 485degC enters the turbine and expands to 1.4MPA. Atthis point, the steam is withdrawn and passed through a reheater. It reenters the turbine at1.3 MPa and 720degC. Expansion now occurs to the condenser pressure of 0.0006MPa. For thecycle and 1kg of steam determine:4. Heat added5. Work Turbine6. Work NetThermal Efficiency7.

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Answered: SITUATIONAL PROBLEM NO II In a reheat…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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In a reheat cycle steam at 15 MPa, 540 degrees Celsius enters the engine and expands to 1.95 MPa. At this point the steam is withdrawn and passes through a reheater. It reenters the engine at 540 degrees Celsius. Expansions now occur to the condenser pressure of 0.0035 MPa. Find the efficiency.
Problem 2: Consider the following Rankine cycle with reheat (notice the numbering here is different from the previous diagram). Steam enters the high pressure turbine at 14MPa and 600C, and is reheated at constant pressure to 600C. It exits the second, low pressure turbine at 10kPa with a quality of 89.4%. Given 2 1 3 4 P3 = 14MPa T3 = 600°C 5 T5 = 600°C Condenser High P. 6 Low P. PG = 10kPa x6 = 89.6% (i.e. moisture content Is limited to 10.4%) Find P4, nth Assumptions SS, Ake = Ape = 0 Ideal cycle (isentropic efficiency of turbine and pump are 100%, no heat transfer where unintended, no pressure drops due to friction) P₂ = P3, P4 = P5, P6 = P₁
A flashed steam geothermal power plant is located where underground hot water is available as a saturated liquid at 700 kPa. The well-head pressure is 600 kPa. The flashed steam enters the steam turbine at 500 kPa and expands to 15 kPa when it is condensed. The flow rate from the well is 29.6 kg/s. Determine the cycle thermal efficiency of the plant in %. If the steam table is needed, please use the green book entitled "Thermodynamics Properties of Water Including Vapor, Liquid, and Solid Phases" by Keenan, Keyes, Hill, and Moore.
Compare the thermal efficiency and turbine-exit quality (temperature if superheated) at the condenser pressure for a simple Rankine cycle and the reheat cycle when the boiler pressure is 5 MPa, the boiler exit temperature is 500°C, and the condenser pressure is 20 kPa. The reheat takes place at 0.5 MPa and the steam leaves the reheater at 500°C. (Enthalpies are in KJ/kg.) Without the reheater, the heat added is: The enthalpy entering the condenser is: The net Work is: The enthalpy entering the reheater is: Without the reheater, the net Work is:

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