Open Systems Exergy Analysis Definition of Useful Work for Open Systems: W mout Surroundings @ToP. Reservoir @Tj Assumptions: ● Surroundings are at fixed To and po System interacts only with surroundings and one or more heat reservoirs 上游充通大 May2,2018 2 SHANGHAI JLAO TONG UNIVERSITYMay 2, 2018 2 Open Systems Exergy Analysis Definition of Useful Work for Open Systems: Surroundings @ To ,po Assumptions: • Surroundings are at fixed To and po • System interacts only with surroundings and one or more heat reservoirs . W . Qj . min . mout B A CV . Qo Reservoir @ Tj