With the maritime industry working to achieve the GHG reduction strategy of IMO and for the reduction of emissions in air, various alternative fuels are coming to the forefront.
Except for LNG, there are no international regulations for these alternative fuels. To address this, DNV GL has come up with new class rules and a class notation ‘Gas fuelled LPG’ so as to use liquefied petroleum gas as an alternative fuel foreseeing the growth in the interest of the industry.
An announcement about this was made on the 3rd of December at Marintec trade fair in China.
Presently all other gases and low flashpoint fuels, except for LNG, comes under the ‘alternative design approach’ that means that these can be used if their safety, reliability and dependability are equal to those that have been achieved by the new and similar conventionally fuelled main and auxiliary machinery. However, it can be time taking and an expensive process and may be a hurdle for the development and expansion of lower emission alternative fuels.
“With the new rules and class notation, we want to offer owners interested in LPG a straightforward path towards compliance with the alternative design approach mandated by the IGF Code,” said Geir Dugstad, Director of Ship Classification & Technical Director at DNV GL – Maritime. “As the fuel environment within the maritime industry becomes more diverse, it is essential that we continue to broaden the enabling rules and regulation to support these new choices.”
The rules and notation are based on the rules of DNV GL for ships that use LNG but also addresses the variations in properties and phases between LPG and LNG. Internal combustion engines, boilers and gas turbines for both gas-only and dual-fuel operations are covered in the “Gas fuelled LPG” notation. All the needs for the fuel supply of a ship is comprised in it while taking into consideration all the aspects of the installation including the LPG consumers (main and auxiliary engines, boilers, etc.).
Reference: DNV GL