DNV GL Develops New NOx Tier III Compliance Guide

DNV GL has developed a new brochure for the design of ships subject to NOx Tier III requirements. Image Credit: DNV GL

DNV GL today announced that it has developed a new brochure that sets out best practices for the design of ships subject to NOx Tier III requirements, offering guidance on the considerations that should be incorporated at the newbuilding stage.

"To ensure the success of any newbuilding plan, shipowners should carefully consider the future operation of their vessels in the newbuilding planning stage, including the implications of the different technological solutions for reducing NOx emissions and how to fulfil the NOx Tier III requirements," said DNV GL.

"In order to fulfil the stricter NOx Tier III emission limits, ship operators have the possibility of choosing from various options. The optimal compliance option will depend upon many factors, including a vessel's individual trading pattern, engine size, and speed."

DNV GL's new brochure details selective catalytic reduction (SCR), exhaust gas recirculation (EGR), the use of alternative fuels, internal engine modifications, direct water injection (DWI), fuel-water emulsion (FWE), and intake air humidification.

"Installing NOx Tier III-compliant technology can offer benefits beyond simply achieving compliance with emissions regulations. Demonstrating a company's commitment to ensuring sustainable operations has become increasingly important," said DNV GL.

The company also notes that financial benefits can be gained through the installation of Tier III-compliant technology, as many ports offer discounts on harbour fees for vessel compliance with third party environmental schemes, such as the Environmental Ship Index (ESI).

Recently, Ship & Bunker reported that, as of July 1, ESI also began evaluating CO2 performance, in addition to existing assessments of NOx and SOx.