Application of First Law of Thermodynamics in Steady Flow Process and Variable Flow Process

Steady Flow Process

In a steady flow process, thermodynamic properties at any section remain constant with respect to time; it can vary only with respect to space. A schematic diagram of steady flow process is shown in Figure 1.7.

Figure 1.7 Schematic Diagram of Steady Flow Process

From continuity equation:

Energy balance equation:

This is known as steady flow energy equation (SFEE) for single stream.