APRIL 20249 ENVIRONMENTAL BUSINESS REVIEWA flywheel energy storing system is the best choice for reliability and long lifetime, but has practical limitations when it comes to energy storage density. However, peak power output performance is still very good. A battery is the best choice with regard to storage density, but has practical limitations when it comes to limited cycle capacity and has a reduced lifetime. A hybrid solution allows superior support for all drilling modes: full peak power shaving in heave compensation and also when tripping in/out. Batteries in combination with flywheel enables nonstop operation of drilling equipment also through periods of generator black-outs.With its energy storage desnity, PBH will offer large electric machines to accelerate faster and work more dynamically. Ultimately, this results in higher operational speed and efficiency for the entire offshore installation.Currently the prototype has been assembled and tested at NOVs R&D testing facilities in Vennesla, Norway, only 20 minutes' drive from NOVs office in Kristiansand. Now that the testing is completed, Odfjell Drilling has selected a drilling vessel with an NOV drilling system package and other supportive power service equipment for use as a case-study and pilot for large-scale testing. The main objective of the project is to proofthe key objectives regarding economic feasibility, energy storage capacity, safety, reliability and lifespan, and specific applications related to rules and regulations for drilling. Eventually show the industry that the new technology behind this concept should be embraced.In conclusion the system greatly contributes to more energy efficient operations, reduction of environmental footprint, load leveling of generators by peak power shaving, and so lowering maintenance costs while increasing safety. In the current market situation of low oil prices and very low new build activity, new and innovative concepts are needed to combine achievement of environmental goals with improved economic viability
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