GCMD Highlights Mass Flow Meter Accuracy Challenges with Biofuel Blends

The Global Centre for Maritime Decarbonisation (GCMD) has conducted research indicating that the validated operational range of mass flow meters (MFMs) may be compromised when measuring certain biofuel blends. This observation stems from GCMD's comprehensive industry review, which examined 12 different MFM models. The findings suggest a discrepancy between the performance envelope of these meters and the physical properties of some biofuel-derived marine fuels.

MFMs are critical instruments in the bunkering process, designed to provide precise measurements of fuel delivered. Their validated range ensures that they operate within specified accuracy tolerances under typical conditions. However, the introduction of novel fuel types, such as those incorporating biofuels, presents new challenges for existing measurement infrastructure.

The GCMD study revealed that some biofuel blends possess properties that can cause their measurement to fall outside the validated accuracy range for certain MFMs. This could potentially lead to inaccuracies in quantifying the actual volume or mass of fuel transferred during bunkering operations. Such deviations impact both the buyer and seller in a transaction.

Challenges related to MFM validation and performance with new fuel types are not unique. The industry has previously encountered similar considerations during the transition to very low sulphur fuel oil (VLSFO). Adapting measurement systems to accommodate evolving fuel characteristics is an ongoing process within the maritime sector.

Addressing these measurement complexities is crucial for ensuring fair trade practices and maintaining confidence in bunkering operations as the industry moves towards decarbonisation. Accurate fuel delivery measurements are fundamental for operational efficiency, compliance, and transparent commercial transactions. The GCMD's work aims to shed light on these issues to support future standards and practices.

Implications for Bunkering Operations

The identified MFM challenges underscore the need for enhanced understanding and potentially updated validation protocols for measurement equipment when handling new fuel types. Industry stakeholders may need to consider how MFM performance is assessed and certified for fuels beyond conventional fossil derivatives. This could involve reviewing current calibration procedures or developing new guidelines tailored to biofuel blends.

Accurate measurement also plays a vital role in emissions reporting and compliance frameworks. If fuel quantity measurements are compromised, it could affect the precision of reported emissions, impacting environmental accountability efforts. Ensuring robust measurement practices is therefore intertwined with the broader goals of maritime decarbonisation and regulatory adherence.

What it means

Commodity traders and shipowners should be aware that the introduction of biofuel blends may present measurement complexities with existing mass flow meters. Potential deviations from validated MFM accuracy ranges could impact bunker quantity declarations and commercial settlements. This highlights the importance of due diligence in bunker quantity surveying for new fuel types and supports ongoing industry efforts to refine measurement standards for alternative marine fuels.