Control volume in a thermodynamic system refers to-

Explanation

Concept: A control volume is a fixed, identifiable region in space through which fluid flows. The boundary of the control volume is called a control surface. Types of System Control Mass System (Closed System) It is a system of fixed mass with a fixed identity This type of system is usually referred to as "closed system" There is no mass transfer across the system boundary Energy transfer may take place into or out of the system Control Volume System (Open System) It is a system of fixed volume This type of system is usually referred to as "open system” or a "control volume" Mass transfer can take place across a control volume Energy transfer may also occur into or out of the system A control volume can be seen as a fixed region across which mass and energy transfers are studied Control Surface - It is the boundary of a control volume across which the transfer of both mass and energy takes place The mass of a control volume (open system) may or may not be fixed Most of the engineering devices, in general, represent an open system or control volume.