2013-2-27 Closed System(Control mass) A system that always contains the same matter (same mass). No transfer of mass across its boundary can occur. Isolated system:special type of closed system that does not interact in any way with its surroundings (no energy crosses its boundary) 131 iven reo A given region flows. Mass may cross the boundary of a CV Boundary of CV is called Control Surface(real or imaginary) Automobile ir Engine 1-32
2013-2-27 16 Closed System (Control mass) ►A system that always contains the same matter (same mass). ►No transfer of mass across its boundary can occur. ►Isolated system: special type of closed system that does not interact in any way with its surroundings (no energy crosses its boundary) 1- 31 Control Volume (Open System) ►A given region of space through which mass flows. ►Mass may cross the boundary of a CV ►Boundary of CV is called Control Surface (real or imaginary) 1-32 Automobile Engine
2013-2-27 用 System Types Basic concepts:System Classification 1Open System (Control volume): Mavs,M Closed System(Control masa) 2 2+3Adiabatic closed system ++3+4Isolated system onosaaegsyonotreed 17
2013-2-27 17 System Types 1-33 1 2 4 3 Mass, M Work, W heat , Q 1 ⇒ Open System (Control volume)： Non-Isolated system + related surrounding＝isolated system 1+2 ⇒ Closed System (Control mass) 1+2+3 ⇒ Adiabatic closed system 1+2+3+4 ⇒ Isolated system Basic concepts: System Classification 34
2013-2-27 Basic concepts:System Classification Mass.M of both energy(heat and work) hea、g Basic concepts:System Classification 0
2013-2-27 18 1 2 4 3 Mass, M Work, W heat , Q 1 ⇒ Open System (Control volume)：between a system and surrounding, there are exchanges of both energy (heat and work) and mass 35 Basic concepts: System Classification 36 Basic concepts: System Classification
2013-2-27 Basic concepts:System Classification 1+2Closed System(Control of energy (heat and work).but no mass exchange. Basic concepts:Closed System 38 19
2013-2-27 19 1 2 4 3 Mass, M Work, W heat , Q 1+2 ⇒ Closed System (Control mass): between a system and surrounding, there are exchanges of energy (heat and work), but no mass exchange. 37 Basic concepts: System Classification 38 Basic concepts: Closed System