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Flare Gas Monitoring

Solar Powered Flow Meters Provide Flare Gas Measurement for Remote Fracking Sites

| Editor: Dominik Stephan

The ST75V Flow Meter is compatible with solar power systems that provide 24Vdc power without any special modifications. A typical solar power system supporting up to 28 meters in an oil/gas production field requires two 50-Watt solar panels to provide 24 hour power, even during cloudy, rainy or snowy winter days. The site engineers also recommended the additional installation of two large 12 Volt, 40 Amp hour backup batteries that are housed in a rugged 16 x 16 x 10 inch [406 x 406 x 254 mm] enclosure.
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The ST75V Flow Meter is compatible with solar power systems that provide 24Vdc power without any special modifications. A typical solar power system supporting up to 28 meters in an oil/gas production field requires two 50-Watt solar panels to provide 24 hour power, even during cloudy, rainy or snowy winter days. The site engineers also recommended the additional installation of two large 12 Volt, 40 Amp hour backup batteries that are housed in a rugged 16 x 16 x 10 inch [406 x 406 x 254 mm] enclosure. (Picture: FCI)

Engineers responsible for oil/gas production at remote field sites that lack easy access to electric power will find constant power technology thermal mass flow meters from Fluid Components International (FCI) can provide a solution to their gas flow metering needs.

To comply with local and worldwide initiatives and regulations attempting to reverse global warming, oil/gas production field engineers are required to monitor and report on emitted (flared) gases occurring at these remote sites. Because FCI’s constant power technology meters require very low power compared to the alternative constant deltaT (variable power) technology, they are uniquely capable of being powered with a small solar panel and provide field operators with an accurate, reliable solution to comply with these regulations.

A recent specific application involved the waste gases that resulted from the separation of hydrocarbon fluids at the well head. This waste gas is unsuitable for commercial use and is sent to a tank with a flare unit to be burned off (flared) as necessary. This gas is a mixed combination of flammable gases that include methane, ethane, propane, isobutene, butane, isopentane, pentane and hexane as well as trace amounts of nitrogen and carbon dioxide. Often there is moisture in this gas, too. The gas line from the tank to the flare was a small 1- inch diameter pipe and had a very limited straight-run.

With its no-moving parts thermal dispersion mass flow sensing element, a solar power-able FCI Model ST75V Flow Meter with built-in Vortab® flow conditioner provides direct mass flow measurement of the gas at this site without the additional equipment required with other flow measurement technologies. Its non-clogging sensor design operates over a wide flow range with low-flow sensitivity. The integral Vortab flow conditioner provides a fully developed flow profile in just seven total pipe diameters.

The ST75V Flow Meter is compatible with solar power systems that provide 24Vdc power without any special modifications. A typical solar power system supporting up to 28 meters in an oil/gas production field requires two 50-Watt solar panels to provide 24 hour power, even during cloudy, rainy or snowy winter days. The site engineers also recommended the additional installation of two large 12 Volt, 40 Amp hour backup batteries that are housed in a rugged 16 x 16 x 10 inch [406 x 406 x 254 mm] enclosure.

The ST75V Flow Meter, with its rugged NEMA 4X/IP67 rated enclosure, is ideal for dirty oil and gas production field installations. It features an inline-style flow body providing accuracy to ±1% of reading with flow ranges from 0.04 to 560 SCFM (0.07 to 950 NCMH), depending on pipe size, and repeatability of ±0.5 percent of reading. It is suitable for line sizes from 0.25 to 2 inches (6 to 51 mm) diameters. For larger diameter pipes of 2.5 to 200 inches [63 to 5000 mm], FCI provides insertion-style flow thermal flow meters such as models ST98 and ST100.

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