Question

Water initially at 300 kPa and 250°C is contained in a constant-volume tank. The water is allowed to cool until its pressure is 150 kPa. On the P-vand T-v diagrams, sketch, with respect to the saturation lines, the process curve passing through both the initial and final states of the water. Label the end states on the process curve. Also, on both the P-vand T-v diagrams, sketch the isotherms passing through both states and show their values, in °C, on the isotherms. Solve this using appropriate software. Use data from the tables.

Answer 1

Ansuet Cven data hitial pressu^e P,- 300kPa nitial icmpevartwe T, 250°c Final Presure Pz - (Solkpa At P and 125o 300 cPa fromthe supeRheated wateh tables O.796k5 m \olume Since vemains Con Start At P2 Sokpa and V, = o.79645 3 saturated wates fables from the Vf@ ISokpa t A, Vifs@l5oKpa A96h5 o00l053 l'15834 2 1,1583K 2 =0795397 20.795S3 9 Cs Scanned with CamScanner

2 T2 Tsate1sokPa l35C By Usin Property plot feature of EEs, and bu we obtain tue following adding tate Poin ts and T-V diagam Pau diagean P-v diagu. 3t Cam APS o 300kPa (50kf 2 -2 10 cs Scanned with CamScanner P(KA7

T diags StCa 1APS S00 Leoo 300 250°c 2cokpa 1-35C Sokpa to 3 lo 2 Cs Scanned with CamScanner