Flow Metering for Emissions Measurement and Other Energy Management Applications

In today’s process industries, strategic energy management includes effective greenhouse gas and emissions measurement to meet increasing regulatory, environmental, social and bottom line demands. From energy recovery to pollution reduction, flow meters can provide data for regulatory compliance, carbon trading and greenhouse gas reduction credits.

Thermal dispersion mass flow meters are one instrumentation option that offers significant advantages over more traditional flow gauging technologies in a range of emissions measurement applications. The table below represents just a few of the opportunities for emissions measurement – and the challenges they pose.

Flow Meter Challenges for Emissions Measurement
Digester Gas: Produced from wastewater treatment digester processes, this mixture of methane and carbon dioxide is also wet and dirty. Low flow rates and pressures make it difficult to monitor gas flaring or control carbon credit data or co-generation systems. Thermal dispersion flow meters:

  • Have no moving parts to clog or foul
  • Will measure mass flow directly without the need for pressure or temperature correction
  • Can be calibrated for mixed gases
  • Operate over a very wide flow range (high turndown)
  • Offer extreme low flow sensitivity
Landfill Gas (LFG): LFG that is flared off or captured in a co-generation project poses challenging control conditions. Mixed composition gas that is wet and dirty and wide variations in flow rates are among the demands of this application.
Coal Mine Methane:With an estimated 8% of the world’s anthropogenic methane air pollution coming from coal mining, methane recovery is a growing energy management application. Capturing the gas for use as a fuel source poses a number of measurement difficulties, including low concentrations of methane; the presence of air, carbon dioxide and nitrogen; and erratic flows.

Thermal dispersion flow meters are also ideal for a wide range of energy management applications, such as natural gas measurement, combustion air flow, compressed air systems and aeration applications. Detailed information on the role of thermal dispersion technology in energy management processes can be found in Magnetrol’s “Flow Instrumentation for Energy Management” bulletin on the Thermal Mass Flow Technology Portal. Get the bulletin by logging in to the Thermal Mass Flow Technology Portal.



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