38 pressure enthalpy diagram water
of water at atmospheric pressure can be calculated as The specific enthalpy of superheated steam can be calculated from: = enthalpy of superheated steam (kJ/kg) = specific heat of steam at = 1.860 (kJ/kg C) = saturation temperature ( C) = superheated steam temperature ( C) at standard atmosphere. Be aware that varies with... Saturated liquid carbon dioxide at a temperature of 20°C and a pressure of 6 MPa undergoes throttling to a pressure of 100 kPa. The final temperature is −80°C. a. From the pressure-enthalpy diagram for carbon dioxide, fi nd the fraction that is converted to dry ice at 100 kPa. b. Enthalpy-composition diagram for ammonia-water at 1.0 MN/m2 pressure (Example 11.10) Since the actual reflux is 8 per cent above the minimum, then: Point N therefore has an ordinate of (437 + 1547) = 1984 and an abscissa of 0.995. Point M is found by drawing NF to cut the line x = 0.10, through W, at M. Pressure enthalpy diagram water