GATE Mechanical Engineering(ME) 2011 Solved Paper
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Question Numbers: 58-59
In an experimental set-up, air flows between two stations P and Q adiabatically. The direction of flow depends on the pressure and temperature conditions maintained at P and Q. The conditions at station P are 150 kPa and 350 K. The temperature at station Q is 300 K.
The following are the properties and relations pertaining to air:
Specific heat at constant pressure, CP =1.005 kJ/kgK;
Specific heat at constant volume, CV = 0.718 kJ/kgK;
Characteristic gas constant, R = 0.287 kJ/kgK
Enthalpy, h = CpT
Internal energy, u = CVT
In an experimental set-up, air flows between two stations P and Q adiabatically. The direction of flow depends on the pressure and temperature conditions maintained at P and Q. The conditions at station P are 150 kPa and 350 K. The temperature at station Q is 300 K.
The following are the properties and relations pertaining to air:
Specific heat at constant pressure, CP =1.005 kJ/kgK;
Specific heat at constant volume, CV = 0.718 kJ/kgK;
Characteristic gas constant, R = 0.287 kJ/kgK
Enthalpy, h = CpT
Internal energy, u = CVT
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Question : 58 of 65
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If the air has to flow from station P to station Q, the maximum possible value of pressure in kPa at station Q is close to
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