The Contrec 515 SC05 is a reliable solution for measuring the volume, mass, and energy content of steam. It uses single or stacked differential pressure flow inputs along with temperature and/or pressure inputs to provide accurate readings.
This versatile device offers various modes, making it ideal for a wide range of steam applications. The flow is calculated using the AGA-3 differential pressure equations, which take into account the calibration conditions of the flowmeter and accurately adjust for thermal expansion effects.
The instrument determines mass flow and energy based on the IAPWS Industrial Formulation (1997), which defines the thermodynamic properties of steam. It uses pressure and temperature values to calculate specific volume and specific enthalpy.
CALCULATIONS
The calculations for steam energy are derived from the IAPWS Industrial Formulation (1997).
For superheated steam, the regions are defined as:
- 0°C < t < 800°C, P < 100MPa
32°F < t < 1472°F, P < 14500psia - 800°C < t < 2000°C, P < 10MPa
1472°F < t < 3632°F, P < 1450psia
Saturated steam regions are:
- 0°C < t < 374°C (critical temperature)
32°F < t < 705°F - P < 22MPa (critical pressure)
P < 3190psia
The water region is defined as:
- 0°C < t < t saturation at system pressure
32°F < t < t saturation at system pressure
Formulas
Volume flow = Mass flow x Specific volume
Energy flow = Mass flow x Specific enthalpy
