Taking power from shore when in port or ‘cold ironing’ as it is known, will significantly reduce offshore vessel’s emissions – combined with renewable energy sources or hybrid propulsion systems with batteries, it could reduce them to zero.
The offshore vessel KL Sandefjord, owned by K Line Offshore AS, a wholly owned subsidiary of Kawasaki Kisen Kaisha Ltd (‘K’ Line) has become the first offshore vessel with the DNV GL class notation Shore Power.
The shore power notation verifies the design and installation of a vessel’s onboard electrical shore connection. When in port, the vessel can shut down its engines and rely on a shore-based electrical supply for its needs at berth.
“We are very pleased to receive this notation for our anchor handler, which reflects our commitment to ensure a cleaner port environment,” said K Line Offshore AS senior vice president, operation and technical, Espen Sørensen.
“With an onboard shore power installation tested and verified by DNV GL we have an offshore vessel equipped for the future. And as a result of the good co-operation we have enjoyed with the Bergen Port Authority and DNV GL during this process, we have also decided to apply for the Shore Power class notation for a sister vessel, KL Saltfjord.”
By tapping into an onshore electrical supply, vessels not only reduce their fuel consumption, but they also eliminate associated emissions. This will have a marked improvement on the air quality in the port and surrounding environment, reducing particulates, NOx, SOx and reducing CO2 by using more efficient shore-based electricity.
DNV GL says it anticipates that, in combination with the use of renewable energy sources, shore-based electrical supply to a vessel can even result in zero emission operation for the duration of a vessel’s stay in port. In addition, it can free the engines for maintenance, reduce wear and tear, and limit noise.
“There is an increasing awareness of the impact of shipping emissions in ports and this is driving investments in cold ironing,” said DNV GL senior vice president and regional manager North Europe, Jon Rysst.
“This is leading to ports requiring and incentivising the use of alternative maritime power. As access expands, alongside the rise of fully-electric and hybrid vessels, cold ironing could soon become standard procedure in many ports around the world – with a noticeable positive impact on air quality. With the shore power notation, shipowners can easily document a safe interface between shore facilities and the ship, based on IEC standards.”
DNV GL’s shore connection class rules cover safety requirements for a vessel’s onboard electrical shore connection. The notation ensures a safe and efficient way of undertaking connection and disconnection of shore power. DNV GL also verifies compatibility between ship and port and provides recommendations for a well-defined future proof technical solution.
The technical requirements are based on the international standard for high voltage shore connections established by IEC, ISO and IEEE in IEC/ISO/IEEE Publication 80005-1 Utility connections in Port – Part 1: High Voltage Shore Connection (HVSC) Systems. Part 3 of this standard is currently under development and will deal with low voltage shore connections. DNV GL is actively involved in this work as a member of the IEC working group.