12 OCTOBER 2017 • FOGHORN FOGHORNFOCUS: MARINE PROPULSION the transients. Total running hours and engine maintenance are reduced while fuel efficiency is maximized. Hybrid hydrogen fuel cell systems with a com- bination of batteries and fuel cells are an up -and-coming technology as well where the infrastructure of hydrogen availability is currently one of main challenges. Washington State Ferries: Abattery hybrid can also be attractive when re- charging from the shore grid is not realistic. The energy storage system can be sized to bridge intermittent load peaks so that the engines can be smaller and operate more efficiently. Apart from improving the operating conditions for the fossil or bio fueled prime movers, this type of hybrid improves safety through system re- dundancy. This is a technology that can easily be retrofitted onto existing diesel-electric systems. Several years ago, the Hyak, a diesel-electric ferry About the Author Kristian Eikeland Holmefjord has a Master’s degree in Electrical and Environmental Engineering from the Norwegian University of Science and Technology. He is currently the Specialist in Product Introduction for the Product Systems department in Rolls-Royce Marine. As one of the leading global engineering companies, Rolls-Royce is committed to provide the most efficient power & propulsion solutions for our customers, always keeping safety as the highest priority. 1.800.777.0714 toll free www.merequipment.com 8-500kW Marine Generators // Pull harder in the harshest marine environments // More copper & premium corrosion resistance // Superior motor starting & low operating temps // Better fuel economy & longer engine life // Easy to service & worldwide dealer support // Proudly made in America Let MCM manage your insurance so you can focus on your voyage MCM is a leading independent insurance brokerage based in the Pacific Northwest. Our marine practice group has more than 100 years of combined experience placing insurance and managing the marine industry’s unique risks. Whether we’re working with vessel operators, builders, repair facilities or suppliers, we create specialized solutions that meet each client’s needs. EMpLoyEE BEnEfits | ExECutivE BEnEfits | REtiREMEnt pLans insuRanCE advisoRy | pRopERty & CasuaLty Contact Damon L. Nasman at (206) 262-6375 or email damon.nasman@mcmnw.com www.mcmnw.com operated by Washington State Ferries, was evaluated and approved for a grant to complete a mid-life refurbishment including a new hybrid installation. This refurbishment fell through due to the total cost of interior and hybrid pro- pulsion renewal compared to the life of the vessel, but it shows the interest in this technology. A newer vessel with a longer life-expectancy would be an even better candidate for these systems. The steps forward: In the future, we are going to see a large increase in sus- tainable and environmentally friendly propulsion solutions. It is becoming economic to invest in these systems and the current funding possibili- ties support this transition. Operators in cooperation with designers and suppliers are strongly encouraged to investigate these options for either new builds or retrofits. It is to both their and the society’s benefit to perform this transition sooner rather than later. The funding options provide a unique opportunity to get the financial support that is needed to renew our ageing fleet. The industry is support- ing this change and the technology is proven. n