The energy equation for a CV is given as:
$$\frac{\partial}{\partial t}\int_{CV}epdV + \int_{CS}(\tilde{u} + \frac{p}{\rho} + \frac{V^2}{2} + gz)\rho V \cdot \hat{n}dA = \dot{Q}_{net,in} + \dot{W}_{shaft,net in}$$
The 3rd term represents:
Time rate of change of the total stored energy of the contents of the CV
The net rate of heat transfer into the CV
None of these are correct
The net rate of energy flow across the control surface
The net rate of work being done on the CV