Optimizing ultrasonic flowmeter performance in biogas apps
Process instrumentation solutions for wet biogas measurement
Biogas measurement presents unique challenges due to its saturated water vapor content and potential for free water. In anaerobic digesters, gas exits at temperatures between 95–102 °F, fully saturated with water vapor. If this gas cools before reaching the measurement point, condensation occurs, leading to free water formation and the onset of multiphase flow. These conditions can compromise the accuracy of flow and methane fraction measurements.
What are the benefits of ultrasonic flowmeters?
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Reliable wet gas measurement; Ideal for anaerobic digester monitoring
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Accurate methane fraction analysis
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Optimized for multiphase flow conditions
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Flexible installation options
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Reduced maintenance downtime
What are the challenges in wet biogas measurement?
The core challenge in biogas measurement is maintaining the gas phase from the digester to the ultrasonic flowmeter. Several factors contribute to measurement complexity including condensation, free water, multiphase flow and flow profile distortion.
Which flowmeters are used to measure wet biogas?
Accurate biogas measurement using ultrasonic flowmeters requires a combination of robust instrumentation and strategic system design. This includes Endress+Hauser's Proline Prosonic Flow B 200 and Proline Prosonic Flow G 300/500. These instruments help ensure methane fraction remains reliable, flow accuracy is preserved and operational stability. Using ultrasonic flowmeters, operators can achieve high-quality data that supports process optimization, regulatory compliance and energy recovery.
