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Q2 Air flows steadily at a rate of 0.6 kg/s through a compressor; • entering at a pressure of 1.2 bar and specific volum
Posted: Tue May 03, 2022 6:38 am
by answerhappygod
- Q2 Air Flows Steadily At A Rate Of 0 6 Kg S Through A Compressor Entering At A Pressure Of 1 2 Bar And Specific Volum 1 (61.19 KiB) Viewed 29 times
Q2 Air flows steadily at a rate of 0.6 kg/s through a compressor; • entering at a pressure of 1.2 bar and specific volume of 0.95 m²/kg; and • leaving at a pressure of 7.5 bar and specific volume of 0.22 m²/kg. The change of specific internal energy in the compressor is measured at 85 kJ/kg, and the heat loss from the compressor casing is 15 kW. i. Calculate the change of specific enthalpy. [4] ii. Calculate the power required to drive the compressor by ignoring the change of potential and kinetic energy. [6] iii. Calculate the specific work requirement of the compressor. [2] iv. Calculate the temperature difference considering the specific heat of air 1.005 kJ/kg.K. [3] V. If the pipe diameter at the inlet and outlet of the compressor is kept the same, determine the velocity ratio. [4] vi. Determine the change of kinetic energy of the compressor at the exit velocity of 1 m/s. [2] vii. Finally, briefly explain how the compressor's performance can be improved, and also determine its minimum required power. [4]