(Solved): A three-stage compressor is designed for minimum work conditions and delivers air to a pressure of ...

A three-stage compressor is designed for minimum work conditions and delivers air to a pressure of $8\mathrm{MPa}$ from $103.3\mathrm{kPa}$. The temperature at the beginning of compression is $33{}^{\circ }\mathrm{C}$ while the index of compression in each stage is 1,32 . The clearance volume is ignored and assume $\mathrm{Cp}$ as $1,005\mathrm{kJ}/\mathrm{kg}$, Cv as $0,78\mathrm{kJ}/\mathrm{K}.\mathrm{K}$ Calculate the following: 1.1 The intermediate pressures in $\mathrm{kPa}$ 1.2 The temperature after compression in the low pressure cylinder 1.3 The heat extracted per kg air in each intercooler 1.4 The work done per kg of air delivered 1.5 The isothermal work done per kg of air and the isothermal efficiency