An inventor claims to have developed a work-producing steady flow device which e

Question

An inventor claims to have developed a work-producing steady flow device which employs steam as the working fluid. The claim states that, for conditions shown on Figure 1, the device accepts 1200kW of heat from a reservoir at 700 degrees celsius, rejects heat at an unspecified rate to a reservoir at 40 degrees celsius, and delivers 1500kW of mechanical power. Would you advise considering a patent application for the device? Specifically, show numerically whether or not the device violaes the Second Law of Thermodynamics.

Explanation / Answer

This is not possible as work done is greater than heat supplied which leads to efficiency more than 100% which is never possible.

This voilets 2nd law of thermodynamics any engine can't give more than 100% efficiency. Rather if you supply some heat engine will reject a part of heat to the sink and the remaining portion of the supplied heat will turn out in the work.

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