One kg of a perfect gas is compressed polytropically from 110 kPa and 27°C to 660 KPa and 180°C with index ne1.3. Calculate the work done. (R gas =0.208 kJkg K)
One kg of a perfect gas is compressed polytropically from 110 kPa and 27°C to 660...
One kg of nitrogen is compressed isothermally form 101 kPa and 20°C to 420 kPa Calculate the work done by the process. (R Niogen K) = 0.297Jkg
Oxygen (molar mass 32 kg/mol) is compressed reversibly and polytropically in a cylinder from 1.05 bar, 15°C to 4.2 bar in such a way that one-third of the work input is rejected as heat to the cylinder walls. Calculate the final temperature of the oxygen. Assume oxygen to be a perfect gas and take cv = 0.649 kJ/kg.K.
100 kg/hr of air is compressed from 110 kPa and 255 K (where it has an enthalpy of 489 kJ/kg) to 1000 kPa and 278 K (where it has an enthalpy of 509 kJ/kg). The exit velocity of the air from the compressor is 60 m/s. The inlet velocity is very small and can be neglected. The process is adiabatic and there is no change in height during the process. a) Label all known information on the diagram. State if...
A quantity of a certain perfect gas is compressed from an initial state of 0.085 m3, 1 bar to a final state of 0.034 m3, 3.9 bar. The specific heat at constant volume is 0.724 kJ/kg×K, and the specific heat at constant pressure is 1.020 kJ/kg×K. The observed temperature rise is 146K. Calculate the specific gas constant, R, the mass of gas present, and the internal energy of the gas.
Nitrogen at 120 kPa and 30°C is compressed to 620 kPa in an adiabatic compressor. Calculate the minimum work needed for this process in kJ/kg. Use the table containing the ideal gas specific heats of various common gases. The minimum work needed for this process is k J/kg.
Carbon dioxide (assume ideal gas) is compressed from 120 kPa and 227°C to 700 kPa and 427°C at a mass flow rate of 5 kg s-1. 100 kW is lost to the environment in the process. Determine the work required
Q3: Air is compressed steadily by a reversible compressor from an inlet state of 100 kPa and 27 C to an exit pressure of 900 kPa. Determine the compressor work with the mass flow rate of 0.12 kg/s;(R-0,287 kJ/kgK) 0 a) Polytropic compression with n-1.3, b) Ideal two stage compression with intercooling with a polytropic exponent of 1 .3. Hava särekli akh, tersinir bir kompresörde 100 kPa basinç ve 27 C sicakliktan, 900 kPa basinca sikaşturidmaktadur. Akgkarun kätle debisinin 0.12...
Air in a piston-cylinder device is compressed from 27°C and 100 kPa to 900 kPa by following a process with Pv14-const. If air is considered as ideal gas, please determine: (1) The air temperature after compression, (2) The heat transfer into or out of the system
2. Helium Gas is compressed from 90kPa and 30° C to 50 kPa in a reversible, adiabatic process. Determine the final temperature, the work done and the entropy generation, assuming the process takes place in a steady-flow compressor. Assume that Helium is an ideal gas with Cp=3.5R.
Argon is compressed in a polytropic process with n= 1 from 120 kPa and 10°C to 600 kPa in a piston–cylinder device. Determine the work produced and heat transferred during this compression process, in kJ/kg. For Argon, R is 0.2081 KJ/kg K, Cv =0.3122 KJ/kg K