Question: A piston/cylinder device operating in a cycle with steam as the working fluid executes the following steps: Steam at 550 kPa and 200oC is

A piston/cylinder device operating in a cycle with steam as the working fluid executes the following steps:
• Steam at 550 kPa and 200oC is heated at constant volume to a pressure of 800 kJPa.
• It then expands, reversibly and adiabatically, to the initial temperature of 200oC.
• Finally, the steam is compressed in a mechanically reversible, isothermal process to the initial pressure of 550 kPa.
What is the thermal efficiency of the cycle?

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