Process Gas Flow Measurement Thermal Flow Meter Supports Green Fuel Cell Energy

From FCI

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Fuel cell technology projects can rely on Fluid Components International's ST80 thermal mass flow meters with Vortab (VIP) flow conditioners to accurately measure gas flow to generate clean electricity while reducing or eliminating environmentally harmful emissions such as carbon, NOX and SOX, according to the company.

ST80 thermal mass flow meters with Vortab (VIP) flow conditioners
ST80 thermal mass flow meters with Vortab (VIP) flow conditioners
(Source: FCI)

These thermal mass flow meters coupled with tab-type flow conditioners are helping process and plant engineers support green fuel cell energy initiatives that produce electricity, hydrogen and water. The design and implementation of such projects also helps industrial plant owners to move closer to zero emissions at their sites.

In such fuel cell projects, the ST80 Flow Meter and VIP Flow Conditioner are installed for the monitoring of multiple fuel cell process applications: (1) fuel gas primary feed; (2) fuel gas pressure relief; (3) deoxidizer relief line flow; (4) cooling tower vent, anode exhaust gas; and (5) fresh air blower discharge flow. VIP flow conditioners are utilized upstream from the meters when less than ideal pipe straight-run conditions could impact overall measurement accuracy.

Designed with FCI’s Adaptive Sensor Technology (AST), the ST80 Flow Meter features a patented hybrid sensor drive. This measuring technique combines both of the industry’s highly proven constant power (CP) and constant temperature (CT) thermal dispersion sensing technologies in the same instrument.

There is a choice of four different flow sensor element designs to ensure best installed performance, including FCI’s newest wet gas solution. The Wet Gas MASSter sensor developed for the ST80 Series optimizes the sensor head design and installation to prevent condensation droplets, entrained moisture or rain from contacting the thermowells, which ensures steady, reliable measurement.

Beyond the ST80 Flow Meter’s applications versatility, it is suitable for pipe diameters from 1 to 99 inches (25 to 2500 mm) and air/gas temperatures up to 850°F (454°C). They feature accuracy of ±1% of reading, ±0.5% of full scale and repeatability of ±0.5% of reading with flow rates as low as 0.25 up to 1000 SFPS (0.07 to 305 NMPS) and 100:1 turndown.

This meter’s outputs and user interface choices are extensive and it interfaces with virtually any control system and/or set-up or configuration devices. Standard outputs include dual, Namur NE43 compliant 4-20 mA analog outputs, HART (version 7), Modbus 485 and a USB port (for interfacing with configuration freeware). Foundation Fieldbus or Profibus PA or DP can be optionally added. The optional backlit LCD display provides digital and bar graph readouts of the flow rate and temperature, totalized flow, alarms, diagnostics feedback and even a user defined label/tag field.


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