Engineering Board Exam Reviewer · Thermodynamics · easy

In a steady-flow device, the energy required to push fluid into or out of a control volume (Pv) is called:

1. Shaft work
2. Boundary work
3. Internal energy
4. Flow work (flow energy)

Answer

D. Flow work (flow energy)

Solution

Flow work per unit mass = Pv; it combines with u to form enthalpy h = u + Pv.

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