a. Explain how supercritical steam increases the Rankine cycle efficiency. Take the case of a reversible supercritical steam cycle with double reheat. Sketch T-s diagram(s) to aid in your explanation. b. Explain the relationship between higher excess air of combustion and the low limit of exit gas temperature from a boiler fired by a sulfur bearing fuel. c. Explain how the Rankine cycle efficiency is related to the pressure and temperature of the heat addition process and the condenser pressure. How is the condenser pressure related to the temperature of the cooling medium? d. A single or double Reheat Rankine cycle is used to avoid unacceptably high moisture content of the expanding steam at the low-pressure stages of the steam turbine. Explain with the help of T-s diagram(s) for a single Reheat Rankine cycle, the cause(s) of the unacceptably high moisture content. Explain also how Reheat cycle serves to increase the Rankine cycle efficiency. e. What is a gas-vapor power cycle? Explain with the help of a why the combined gas-vapor power cycle has a higher thermodynamic cycle efficiency than either of the cycles executed individually.

a. Explain how supercritical steam increases the Rankine cycle efficiency. Take the case of a reversible supercritical steam cycle with double reheat. Sketch T-s diagram(s) to aid in your explanation. b. Explain the relationship between higher excess air of combustion and the low limit of exit gas temperature from a boiler fired by a sulfur bearing fuel. c. Explain how the Rankine cycle efficiency is related to the pressure and temperature of the heat addition process and the condenser pressure. How is the condenser pressure related to the temperature of the cooling medium? d. A single or double Reheat Rankine cycle is used to avoid unacceptably high moisture content of the expanding steam at the low-pressure stages of the steam turbine. Explain with the help of T-s diagram(s) for a single Reheat Rankine cycle, the cause(s) of the unacceptably high moisture content. Explain also how Reheat cycle serves to increase the Rankine cycle efficiency. e. What is a gas-vapor power cycle? Explain with the help of a why the combined gas-vapor power cycle has a higher thermodynamic cycle efficiency than either of the cycles executed individually.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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