Steady state Conservation of mass ∑m=∑m (mass rate in) (mass rate out) Conservation of energy 0 7 a-晚+(a+兰+)区a(+兰+x） dt a.+ya+兰+)-成+公e+誉+) (energy rate in) (energy rate out) 上游充通大学 Mar/20,Mon,2017 10 SHANGHAI JLAO TONG UNIVERSITYMar/20, Mon, 2017 10 Steady state 0 Conservation of mass Conservation of energy