"AIRExpander" calculates the expansion of dry standard air for all kind of turbo expanders You can easily edit the boundary conditions by the app sliders. For each calculation inlet pressure, inlet temperature and exhaust pressure are mandatory. One of the three parameters mass flow, efficiency or power can be calculated. You can switch between these three parameters. The following sizes are additional calculated for inlet and exhaust: enthalpy, entropy, specific volume and volumetric flow.