Approximate application ranges in terms of ICFM and discharge pressure for four categories of compressors can be quickly approximated using Figure 100-11. Figures 100-12 through…

# Category: Compressors

A gas analysis should be provided for all present and future operating conditions, and it should be checked for the presence of sulfides, chlorides, or…

General characteristic curves for the four types of compressors at constant speed are shown in Figure 100-10.

The system resistance met by a compressor can vary from a constant discharge pressure to a variable relationship as shown in the generalized system resistance…

The first step in specifying compressors is to define the required compression duty. This includes defining: • flow rate • gas composition • suction pressure…

Polytropic compression is commonly assumed for dynamic (centrifugal and axial) compressors. The previous discussion of the adiabatic process showed that its relationships need mathematical corrections…

Thermodynamic-property diagrams account directly for deviations of a real gas from ideal relationships. These diagrams are a plot of gas properties, commonly including: enthalpy, entropy,…

Isentropic means constant entropy (a definition of entropy is beyond the scope of this manual). Adiabatic describes a process wherein no heat is added or…

In an isothermal process, the temperature is unchanged during compression. Although it is impossible to build a machine that will compress isothermally, isothermal performance is…

The two actual methods used to calculate thermodynamic relationships are isentropic (adiabatic) and polytropic. These calculations are the basis for determining capacity, driver size, and…