Continue Example 30.2 HOT RESERYOIR,TH Assumptions:1 power cycle.R is reversible and I is cH irreversible.2.Each system receives QH from the hot reservoir and discharges energy at Tc to the cold reservoir. Solution: Q. COLD RESERYOIR,Te Energy balance(1st law)for cycles R and I: OH =WR +Oc On=W+Oc →Q=Qe+W-W Cycle I: 到1-号号→ WR-W T Cycle R:reversible→0 (b):with irreversibilities,cyce>0. WR-WI (a W-W>0→W>W Te Te 上游充通大 Apr/10,Mon,2017 14 SHANGHAI JLAO TONG UNIVERSITYApr/10, Mon, 2017 14 Continue Example 30.2 Assumptions: 1 power cycle. R is reversible and I is irreversible. 2. Each system receives QH from the hot reservoir and discharges energy at TC to the cold reservoir. H C cycle b H C Q Q Q T T T                     Solution: Cycle I: Energy balance (1st law) for cycles R and I: Q W Q H R C   H I C Q W Q    C C R I     Q Q W W  , cycle ( )                  H R I C H C C Q W W Q T T T  Cycle R: reversible 0 R I cycle C   W W T (a)  (b): with irreversibilities, σcycle >0. R I R I C 0     W W W W T