Question

270 MULTIPHASE SYSTEMS 6.13 The ideal Rankine cycle can be analyzed in the lmi where the difference between the boiler pressure (P + dP) and the condenser pressure (P) is infinitesimal. The cycle is indicated on the P-v diagram and, alternatively, on the T-s diagram. See Fig. P.13. Show that the areas enclosed by the cycle on the two diagrams are equal and from this derive dP/dT-SVg Next, consider the reversible heating process f-g in the boiler, invoke the first law and the second law, and show that P+dP Sr Ve Figure P6.13

Answer 1

Yea 1-2 SI

Sy Sf ation he v+PV e change pvocess ½ince dlo not Cho-ge

net d So by Compavin^ oth ea Conet Qnet dT 1 lac.)

dlT Ve