A turboprop airplane engine consists of three parts: adiabatic compressor, heater and adiabatic turbine. The compressor raises
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A turboprop airplane engine consists of three parts: adiabatic compressor, heater and adiabatic turbine. The compressor raises the pressure of ambient air (1 bar, 25 oC) to 20 bar. The heater raises the temperature of this air to 1500 K, holding pressure constant. This hot, high pressure air drives the turbine and produces work. Assuming that air is an ideal diatomic gas with constant heat capacity, answer the following for two cases: 1) the compressor and turbine are isentropic, 2) the compressor and turbine both have an isentropic efficiency of 80%.
- For case 1 how much work is generated per mole of air passing through the system (kJ/mole, as positive number)
- For case 1 what fraction of the heat provided by the burner is converted to work?
- For case 1 what is the entropy change for the air as it passes through the system? (J/mole-K)
- For case 2 how much work is generated per mole of air passing through the system? (kJ/mole, as positive number?
- For case 2 what fraction of the heat provided by the burner is converted to work?
Related Book For
Thermodynamics An Engineering Approach
ISBN: 978-0073398174
8th edition
Authors: Yunus A. Cengel, Michael A. Boles
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