Air enters a reversible compressor steadily and it is compressed from an inlet temperature and pressure of 25 degree C and 88 kpa repsectively. Air leaves the compressor at 800 kpa. Compute the compressor work per unit of mass for an isentropic compression.

Air enters a turbine at temperature and pressure of 800°C, 10bar respectively. The actual exit airtemperature is 180°C. The turbine isentropic efficiency is estimated to be 85%. Calculate the turbine exit pressure and the actual expansion index (n).

an air compressor of three stage compresses air from 100 kpa to 1000 kpa. calculate the intercooler pressure between the first and second stage

A single-stage double-acting air compressor compresses the air from 1 bar to  5 bar. The compressor runs at 2.2 rps and work done during the compression is 36 kJ. Calculate the power required in kW. the power required in kW

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A four-stage single-acting air compressor running in an atmospheric at 87 kPa and 15°C has a F.A.D of 2.83 m³/min. The section pressure and temperature are 80 kPa and 32 °C respectively, the delivery pressure is to be 7 MPa. The temperature at the start of compression in each stage is 32 °C, take n=1.3  for all stages. calculate: 1. The intermidiate pressure ratio 2. The intermidiate pressure at first, second and third stages in kPa

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There are compressed 11.33 m3/min of air from 103.42 kPa, 26.7°C to 827.36 kPa.  All clearances are 8%. (a) Find the isentropic power and piston displacement required for a single stage compression. (b) Using the same data, find the minimum ideal power for two-stage compression when the intercooler cools the air to the initial temperature . (c) Find the displacement of each cylinder for the conditions of part (b).  (d) How much heat is exchanged in the intercooler?  (e) For a compressor efficiency of 78%, what driving motor output is required?