Steam energy metering with a stacked DP flowmeter, vortex or turbine style, needs mass flow and energy worked out correctly across water, saturated steam, and superheated steam. The Contrec 515 SC06 Steam Flow Computer is built for this, for volumetric differential pressure flowmeters.
It runs standard DP flow calculations while accounting for the primary meter’s own reference calibration conditions, and resolves mass flow and thermodynamic energy per the IAPWS-IF97 Industrial Formulation, using live temperature and pressure inputs to determine specific volume and specific enthalpy as steam conditions change. Stacked volumetric flow inputs extend the operating range without losing precision at low flow.
In actual application, this unit usually sits out on process plant rather than in a control room, so it comes in a weatherproof IP65 field-mounting enclosure with a backlit alphanumeric LCD. It supports custody transfer and plant energy balancing applications where the energy numbers need to be defensible.
Before we quote this, we would normally check your DP transmitter range (single or stacked), your steam pressure and temperature, and whether you are measuring saturated or superheated steam.
Hope this helps.
