Var Pump $—$ Pump with variable input displacement and volumetric efficiency

This component describes an ideal pump with constant displacement.

Implementation

The flow rate (q) is given by:

q = Dpump $\cdot$ w $\cdot$ volumetricEfficiency / (2 $\cdot$ $\mathrm{\pi }$)

If the inlet pressure is lower than the atmospheric pressure, the delivered flow rate becomes smaller. Flow from port_A to port_B is considered positive.

Variables used in the above equation

 q Flow rate at the outlet port $\left[\frac{{m}^{3}}{s}\right]$ Dpump Displacement per revolution $\left[{m}^{3}\right]$ w Angular velocity $\left[\frac{\mathrm{rad}}{s}\right]$ volumetricEfficiency Volumetric Efficiency (0-1)

Assumptions

Ideal pump with constant displacement (that is, no losses included).

Connections

 Name Description Modelica ID ${\mathrm{port}}_{A}$ Port A, where oil flows into the component ($0, ${p}_{B}<{p}_{A}$ means $0<\mathrm{Δp}$) port_A ${\mathrm{port}}_{B}$ Port B, where oil leaves the component ($q<0$, ${p}_{B}<{p}_{A}$ means $0<\mathrm{Δp}$) port_B ${\mathrm{flange}}_{a}$ flange_a ${\mathrm{flange}}_{b}$ flange_b $\mathrm{oil}$ oil $\mathrm{VE}$ volumetricEfficiency ${\mathrm{D}}_{\mathrm{pump}}$ Dpump

Parameters

 Name Default Units Description Modelica ID ${\mathrm{ΔT}}_{\mathrm{system}}$ $0$ $K$ Temperature offset from system temperature dT_system