In the present study, to convert the pressure signals measured by using pressure sensor to pressure values (in bar), a computer code was written in Matlab by a Computer Engineer and p–h and p–V diagrams were determined and drawn.
Also, here indicated power values (in kW) were determined by computing of the enclosed positive areas of these p–V diagrams by using trapezoidal rule. At 2500 rpm, for NDF the gross indicated power is 45.52 kW, while for water adding the gross indicated powers become 45.92, 46.32, 45.84, 46.32 and 45.92 kW.