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Pump Efficiency

The pump efficiency can be evaluated using following efficiency formula:


where 36 denotes the efficiency, 37 is the torque, 40 is the angular velocity, 38 is the volume flow rate and 39 is the specific enthalpy which can be evaluated as follows:


Subscript 42in means averaged quantities at the inlet, whereas subscript 42out denotes averaged quantities at the outlet. The evaluation of pump efficiency for different patches is also possible.