(2).Water heater at steady state boundarv mout outlet hot water water heater nlet min II 10L cold water mout=mn？ Close system or open system? 上游充通大 March 3,2018 8 SHANGHAI JIAO TONG UNIVERSITYMarch 3, 2018 8 mout mout = min ? min Close system or open system? (2)．Water heater at steady state