LNG Support Lead – Pacesetting and Downstream Support
16:30 - 17:00
Thursday, 19 September 2019
T1.10 Setting the standard for an automated LNG Bunker Delivery Note
LNG fuel is being used increasingly to fulfil more stringent MARPOL and local environmental regulations.
But until now, bulk LNG has been traded by energy content not mass, therefore extra measurements are needed on board of the LNG Bunker Vessel.
The challenge is to combine all these measurements into an integrated contractually-accepted Bunker Delivery Note (BDN). This must be easy-to-use, tamper proof, acceptable to Customs & Regulatory authorities all around the world. It must also integrate multiple measurement input technologies and match supplier/customer communication protocols.
Q-LNG Transport, Shell & Wartsila have combined their long experience in the LNG sector to provide a solution to this challenge, which will be explained.
A Description of the solution.
LNG bunker transfers are becoming more common, but this is still relatively unknown territory compared to traditional Bulk LNG Custody Transfer. For regular fuel oil bunkering, automated BDN’s already exist, however, LNG is not traded in mass, rather in energy content. This introduces additional challenges.
To produce a Bunker Delivery Note that gives the full picture of the quantity and quality of the LNG transferred, it is important to connect the relevant measurement points:
- Liquid temperatures
- Vapor temperatures and pressures
- LNG quantities (m3)
- Gas to engine/GCU meter readings
- LNG Composition (including methane number and calorific value)
- Time of transfer
The above parameters are all captured in a calculation tool used and verified by an independent 3rd party. This calculation tool has been proven in its use by the larger LNG transfers in the past and has all the industry accepted formulas embedded next to the standard accepted LNG industry parameters.
The transfer of LNG in smaller quantities, to multiple customers requires the industry to develop and use a standard for monitoring and proving the quality and quantity of the LNG delivery. By working together as industry partners Shell, Wartsila and, Q-LNG gained experience from the development and operation of a 4k m3 LNG barge. This project has proved it is possible to connect the onboard measurements and produce an acceptable comprehensive Bunker Delivery Note. This should be the starting point for a global, industry-wide LNG Custody Transfer Standard Bunker Delivery Note.
The Paper will set out how this new standard BDN can be adopted and implemented