Turbines, compressors, and pumps convert [[Energy|energy]] between [[Fluid Pressure|fluid pressure]] and shaft [[Work|work]]. Turbines will provide work output in exchange for decreasing fluid pressure. Likewise, compressors and pumps will require work input to increase fluid pressure. Compressors are used to increase the pressure of [[Gas|gases]], while pumps will increase the pressure of [[Liquid|liquids]].
Turbine:
![[turbine.png|center|500]]
Compressor:
![[compressor.png|center|500]]
Equation Summary:
| Conservation Item | Condition | Result |
| ------------------------ | -------------------- | --------------------------- |
| Heat | Adiabatic | $\dot{Q}=0$ |
| Work | Non-zero work | |
| Enthalpy | Non-negligible | |
| Kinetic | Typically negligible | $\Delta K=0$ |
| Potential | Typically negligible | $\Delta P=0$ |
| Mass Conservation | | $\dot{m}_i=\dot{m}_e$ |
| Turbine Pressure | Decreases | $P2<P1$ |
| Compressor/Pump Pressure | Increases | $P2>P1$ |
| Total Energy Balance | | $−\dot{W}=\dot{m}(h_2−h_1)$