PRESSURE, psia 1 0.6 69 0.4 0.2 2 10000 6000 4000 2000 0 R-718 (water/steam) 200 400 600 800 Reference state: h= 0.0 Btu/lb, s=0.00 Btu/lb F for saturated liquid at 32.02F 1000 600 400 480 200 100 60 40 20 10 64 0.1 0.06 0 Freezing Line 62. 62 09 0.1 = 120F 0.2 Saturated L 160 0.3 0.1 0.4 240 280 320 0.5 0.2 0.6 0.7 0.3 0.8 0.9 200 400 Properties computed with: NIST REFPROP version 7.0 X=0.4- 80 160 640- 089 360 - 320 280 T = 240F 200 120 0 40 Triple Point=32.02F Solid+Vapor Region 600 800 35 1000 30 25 1200 C.D. 640 600 560 520 480 440 fi 400 V s = 2.40 Btu/lb F 1000 1200 1400 ENTHALPY, Btu/lb Fig. 17 Pressure-Enthalpy Diagram for Refrigerant 718 (Water/Steam) a) Trace constant property lines that pass through the critical point which is the top of the vapor dome -use blue for constant temperature -red for constant pressure -green for constant enthalpy -violet for constant entropy b) Property values at the critical point temperature- ? Pressure- ? Enthalpy- ? Entropy- ? 2.5 10 1400 p = 8.0 lb/ft 6.0 2.6 T=920F 1000 4.0 1600 10000 6000 4000 2.0 2000 1.0 1000 0.80 0.60 600 0.40 400 0.20 200 0.10 100 0.080 0.060 60 0.040 40 0.020 20 20 0.010 0.0080 0.0060 0.0040 164 10 0.0020 2 0.0010 1 0.0008 0.0006 0.6 0.0004 0.4 0.0002 0.2 0.0001 0.1 10 0.06 1600 Based on formulation of Wagner and Pruss (2002) ME-302