The 515 SC04 application measures the volume, mass and energy content of steam by using single or stacked differential pressure flow inputs in conjunction with a temperature and/or pressure input.
A selection of various modes makes it suitable for many steam applications. Flow is calculated according to equations for ISO 5167 or V-Cone meters and accurately accounts for thermal expension effects.
The energy calculations are based on the IAPWS Industrial Formulation (1997) for the thermodynamic properties of steam. Pressure and temperature values are used to determine the specific volume and enthalpy. The instrument also calculates the isentropic exponent and absolute viscosity which are required for the differential flowrate calculations.
The steam energy calculations are based on the IAPWS Industrial Formulation (1997).
Superheated steam regions are:
0°C < t < 800°C P < 100MPa
32°F < t < 1472°F P < 14500psia800°C < t < 2000°C P < 10MPa
1472°F < t < 3632°F P < 1450psiaSaturated steam regions are:0°C < t < 374°C (critical temperature)
32°F < t < 705°FP < 22MPa (critical pressure)
P < 3190psiaWater region is:0°C < t < t saturation at system pressure
32°C < t < t saturation at system pressureFormulasVolume flow = Mass flow x Specific volumeEnergy flow = Mass flow x Specific enthalpy