Interpreting the Carnot corollaries Dotted line defines combined system 行中中年者中年车年年香小华中小小小票自车车小年有中小中小年中中非年华果车中车年小中中年华华车车车青有 Hot reservoir First,two power cycles R and I; >OH Then Let R operate as a refrigeration cycle; WR W SameW QH and Qc Hot reservoir:no change Qc=CH-WR Oc=CH-WI Cold reservoir Combined system: W cle <0 (single reservoir) Similarly:for two reversible cycles R1 and R2 WI-WR<0 WR1=W2->7R1=1R2 So,2nd law places limits on the performance Wi<WR---->m<n 上游充通大 April 17,2018 6 SHANGHAI JIAO TONG UNIVERSITYApril 17, 2018 6 Interpreting the Carnot corollaries First, two power cycles R and I; Then Let R operate as a refrigeration cycle; Same WR , QH , and QC Hot reservoir: no change Combined system: W W I R    I R  W W R1 R2    R1 R2  Similarly: for two reversible cycles R1 and R2 So, 2nd law places limits on the performance