Name the compressor "c3comp" (yes a fluid and a tool can have the same name) and describe it as "Propane Compressor".
Set the inlet fluid to be "c3comp" and the pressure to the outlet pressure of the condenser (c3jt), plus its pressure drop (%dp). Finally set the efficiency to be 75. The compressor actually uses fractional efficiencies, but if the efficiency value is greater than 1.0, it is automatically divided by 100.0.
At this point the tool will calculate the outlet enthalpy and display it at the bottom of the page. If the feed flow is known, the required compressor power will also be displayed. Like the mixer, outlet values for H, F, Q, X and P can be referenced from formulas. Also E can be used to retrieve the efficiency and power to retrieve the required compressor power.
Return to the diagram and create a new fluid to represent the inlet to the condenser.