Developing the Energy Rate Balance for a CV Energy is an extensive property Energy enters/leaves CV Mass enters and exits. Energy transfers can occur by heat and work Inlet i Energy Conservation Principal time rate of change of the energy contained within Control the control volume at volume time t u: +8 Exit e net rate at which net rate at which net rate of energy energy is being energy is being transfer into the Dashed line defines transferred in transferred out 十 control volume the control volume boundary by heat transfer by work at accompanying at time t time t mass flow 1-inlet 1-exit CV> 1D flow =Q-+m4+ dt 2 me ue 2 上降文通大学 March 31,2018 2 SHANGHAI JLAO TONG UNIVERSITYMarch 31, 2018 2 Developing the Energy Rate Balance for a CV Energy is an extensive property Mass enters and exits Energy enters/leaves CV Energy Conservation Principal 1-inlet 1-exit CV + 1D flow