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leysirivera23ovez6n
16.03.2020 •
Engineering
Steam at 15 bar, 540 °C, 60 m/s enters an insulated turbine operating at steady state and exits at1.5 bar, 89.4 m/s. The work developed per kg of steam flowing is claimed to be (a) 606 kJ/kg, (b)765.9 kJ/kg. Can either claim be correct? Explain. textbook
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Ответ:
Both can be correct is steam exits as superheated steam.
Explanation:
The model for the turbine is created by using the First Law of Thermodynamics:
Specific enthalpies for both states are presented below:
State 1 (Superheated Steam)
State 2 (Saturated Vapor)
The specific work of turbine is:
Both can be correct is steam exits as superheated steam.
Ответ:
Scientific laws are created when a theory has stood the test of time and cannot be proven wrong. A scientific law is a statement based on repeated experimental observations that describes some aspects of the universe.