A. Calculate the thermal efficiency of a Rankine cycle in which the steam is initially dry saturated at 2 Mpa and the condenser pressure 7kN/m2 . Express this efficiency as a percentage of a Carnot cycle efficiency of the same limits of temperature.
A. Calculate the thermal efficiency of a Rankine cycle in which the steam is initially dry saturated at 2 Mpa and the condenser pressure 7kN/m2 . Express this efficiency as a percentage of a Carnot cycle efficiency of the same limits of temperature.
Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter22: Condensers
Section: Chapter Questions
Problem 7RQ: When a standard-efficiency air-cooled condenser is used, the condensing refrigerant will normally be...
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Question
A. Calculate the thermal efficiency of a Rankine cycle in which the steam
is initially dry saturated at 2 Mpa and the condenser pressure 7kN/m2
.
Express this efficiency as a percentage of a Carnot cycle efficiency of the
same limits of temperature.
B. If the steam leaves the boiler at 3500C with the same pressure of the
boiler and condenser given above. Explain why the Rankine efficiency
in (A) is less than in (B), and why the ratio of efficiencies of the
respective Rankine and Carnot is grater. Ans [ 88.3%, 49.9%]
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