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Pump Efficiency
The pump efficiency can be evaluated using following efficiency formula: 
where 
denotes the efficiency, 
is the torque, 
is the angular velocity, 
is the volume flow rate and 
is the specific enthalpy which can be evaluated as follows: 
Subscript in means averaged quantities at the inlet, whereas subscript out denotes averaged quantities at the outlet. The evaluation of pump efficiency for different patches is also possible.
where denotes the efficiency, is the torque, is the angular velocity, is the volume flow rate and is the specific enthalpy which can be evaluated as follows:
Subscript in means averaged quantities at the inlet, whereas subscript out denotes averaged quantities at the outlet. The evaluation of pump efficiency for different patches is also possible.