Standards Development

Scope

The proposed document defines procedures and requirements for transporting liquefied natural gas (LNG) from trucks to ships (TTS) using the combination of Coriolis mass flowmeter (MFM) and gas chromatograph (GC). It also gives guidance for portable packaging of the combination system in mobile form which minimizes facility storage space and streamline the use of development systems. Output from the system in calorie units is applicable to commercial transactions between suppliers and users of liquefied natural gas (LNG) as marine fuel.

The proposed document consists of definitions of related terms, abbreviations, general requirements, metrological requirements, system flawless requirements, requirements and test methods, procedures, and appendices for measurement methods.

Purpose

Purpose

Package and standardize the flow system for Truck to Ship bunkering of LNG fuelled vessels using Coriolis flowmeters and Gas Chromatography to quickly calculate and store the vessel's quantity/quality, thereby reducing time lost in the ship's flight schedule. It aims to reduce stakeholder disputes caused by supply/demand quantity differences.

Is there a verified market need for the proposal?

LNG Fuelled Vessel

• The establishment of international and regional Clean Zones has strengthened the regulation of the national and regional ship SOx emissions.

• Increased EPA Tier has led to tighter emission regulations.

• All ships need to reduce their emissions.

• The increasing number of LNG fuelled vessels that can pursue economic and environmental simultaneously. Truck to Ship Bunkering

• One of the main advantages of TTS (truck-to-ship) bunkering is its relatively low investment cost.

• Trucks used for bunkering are useful because they can also be used for other purposes such as LNG distribution.

• TTS bunkering has the advantage that there are many LNG supply areas.

• For these reasons, TTS bunkering is the most widely used method for bunkering ports in LNG fuelled vessels. What problem does this document solve?

• Mass flow measurement is important throughout the industry as it eliminates inaccuracies due to the physical properties of the fluid.

• Coriolis flowmeters can leverage the Coriolis effect to improve the measurement procedure by providing direct and accurate mass flow measurements of both liquids and gases during the bunkering process.

• GC (Gas Chromatography) can decompose components of gaseous sample and have very low detection limits for certain compounds like methane, ethane, prophane, butane and nitrogen from the LNG properties, accurately measure fuel components to improve bunkering efficiency.

• GC is a fully quantitative technique that can provide accurate data such as the number of peak areas for quantitative estimation. What value will the document bring to end-users?

• A manual for the LNG bunkering TTS qualified system will be developed.

• In the future, small and medium LNG ships will be used for direct transport to small and medium LNG  storage stations, LNG bunker fuelling stations or demand destinations. Since the sampling/gas analysis system will be expensive to build, the application of this flow system standardization technology can increase the economical / convenience.