Value of n for any polytropic process can very from 0 to infinity. All the know process like constant volume, constant pressure,adiabatic etc are also special cases of polytropic process.

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Polytropic Process. A polytropic process is any thermodynamic process that can be expressed by the following equation: pV n = constant. The polytropic process can describe gas expansion and compression which include heat transfer. The exponent n is known as the polytropic index and it may take on any value from 0 to ∞, depending on the ...

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Air is expanded from 1 MPa, 327C to 200 kPa in a closed piston-cylinder device through a polytropic process with index n=1.2. The work produced during this process is closest to: Select one: a. 422.8 kJ/kg b. 504.2 kJ/kg c. 202.6 kJ/kg d. 263.4 kJ/kg e. 361.7 kJ/kg

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Most people chose this as the best definition of polytropic: (physics) Of any change i... See the dictionary meaning, pronunciation, and sentence examples.

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Nov 29, 2013 · Experiment 5 Polytropic Expansion of Air 35 The Experiments Photographs of the equipment appear in Figures 5.2 and 5.3, and a sketch of the components appears in Figure 5.4. steel pressure vessel d ischarge valves thermocouple conduit pressure transducer Figure 5.2 The polytropic expansion experiment at Cal Poly. thermocouples thermocouple ...

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Value of n for any polytropic process can very from 0 to infinity. All the know process like constant volume, constant pressure,adiabatic etc are also special cases of polytropic process.

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Air Mass (astronomy) - Calculating Air Mass - Atmospheric Models - Polytropic Atmosphere... is simplistic a more realistic model is the polytropic atmosphere, for which where is the sea-level temperature and is the temperature lapse rate ... a function of elevation is where is the polytropic exponent (or polytropic index) ...

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Sep 02, 2015 · For a pressure ratio of 8:1 the theoretical power per 1/s of air compressed is 0.208 kW for isothermal, 0.284 kW for isentropic, 0.248 kW for polytropic (n = 1.2) and 0.242 kW for a 2-stage compressor. See Figure 3. Multi-staging is valuable for other reasons than efficiency.

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Suppose a tank filled with gas is discharing, then the pressure and temperature will decrease. consider two instances (p1,v1) and (p2,v2) with some time interval. If there is no heat addition then...

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Most sources Ive found say that when dealing with the polytropic index for flow calculations for compressors, an ideal process is isothermal for the least amount of required work (n = 1). I know that n = 1.20 - 1.35 is the most common for this scenario.

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For air, R = 287 J/kg/K. Specific heat capacity. ... The value of n is the polytropic index and depends on the process. The specific work done for a polytropic ...

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Oct 19, 2018 · For example, in a chemical plant multistage gas compressor, if each stage has the same polytropic efficiency, it will be also the same polytropic efficiency of the total stage machine. Another convenience comes for them. Ironically the similar air compressor field has more often used the isentrpoic efficiency despite the same compressor group.