Find General Efficiency of Reciprocating Pumps

[indistress]

Does anybody know where I can find the general efficiency of reciprocating pump?

 

[Mech_Engineer]

The general efficiency is:

$$\eta=\frac{P_{out}}{P_{in}}$$

 

[Mech_Engineer]

More specifically, isentropic pump efficiency is defined as:

$$\eta_{p}=\frac{\left(-Wdot_{cv}/mdot\right)_{s}}{\left(-Wdot_{cv}/mdot\right)}$$

Where:

$$\left(\frac{-Wdot_{cv}}{mdot}\right)_{s}=h_{2s}-h_{1}$$
and
$$\left(\frac{-Wdot_{cv}}{mdot}\right)=h_{2}-h_{1}$$