A Practical guide to wartsila scrubber systems BIMCO 2nd of june 2015 Stian Aakre A Practical Guide to Scrubber Systems/ Stian Aakre

Marine Sulphur and Scrubber legislation Body Act IMO - SOx MARPOL Annex VI IMO - Scrubbers Resolution MEPC.184(59) EU 2012/33/EU US EPA Vessel General Permit – VGP California Air Resources Board - CARB 2015 2020 2025 Presentation name / Author

Wärtsilä Marine Scrubber Portfolio Open loop scrubber – sea water operations Uses seawater i.e. no freshwater needs Slightly higher power demand than FWS Does not need caustic soda Applications: main alternative for ocean-going ships Closed loop scrubber – fresh water/closed loop operations Independent on seawater alkalinity Zero effluent discharge an option Low power demand Needs caustic soda as a reagent Applications: seas with extremely low alkalinity and for operators looking for continuous closed loop operation Hybrid scrubbers – open loop / closed loop operations Flexible system More complex system Applications: ships requiring full flexibility of operations Presentation name / Author

Meet IMO Tier III with Wärtsilä NOx Reducer Easy, proven and safe add-on technology Comply with NOx emission regulations - IMO Tier III, US-EPA, local requirements Future-proof global operation Allow flexible installation Gain OPEX savings for engine + SCR integration Comply with Wärtsilä Scrubbers and HFO up to 3,5% Sulphur 2015 Wärtsilä NOx Reducer

Wärtsilä Marine Scrubber Portfolio Presentation name / Author

Open loop vs hybrid vs closed loop Presentation name / Author

Open loop vs hybrid vs closed loop Presentation name / Author

Inline vs conventional scrubber Inline scrubber Conventional scrubber Wash water amount 55 m3/MWh 45 m3/MWh Max fuel S% content in open loop 2,5% 3,5% PM removal No Up to 85% Benefits inline scrubber: Smaller footprint and operational flexibility The main stream configuration provides good redundancy No by-pass and simple installation Reference inline scrubber First installation: Color Line Super Speed 2 in operation Similar installations for 3 other Color Line vessels 11 Inline scrubbers (hybrid) ordered for cruise vessels 4 Inline scrubbers (closed loop) ordered for two RoRo vessel

𝑆 𝑓𝑢𝑒𝑙 →𝑆𝑂2 𝑒𝑥ℎ𝑎𝑢𝑠𝑡 𝑔𝑎𝑠 →𝑆𝑂4 (𝑑𝑖𝑠𝑐ℎ𝑎𝑟𝑔𝑒 𝑤𝑎𝑡𝑒𝑟) Sulphur in sea 𝑆 𝑓𝑢𝑒𝑙 →𝑆𝑂2 𝑒𝑥ℎ𝑎𝑢𝑠𝑡 𝑔𝑎𝑠 →𝑆𝑂4 (𝑑𝑖𝑠𝑐ℎ𝑎𝑟𝑔𝑒 𝑤𝑎𝑡𝑒𝑟) Sulphur oxides SOx in sea water (scrubbing process) forms sulphuric acid – low pH Sea water alkalinity neutralizes the pH – rest “product” from scrubbing is sulphate Sulphate is a natural substance in sea water - approximate amount: 2 700 mg/l

Water treatment and sludge All Wärtsilä scrubber systems have water treatment included as a default. The goal is to always follow current and future legislation, guaranteeing compliance for our customer. To be disposed of ashore Estimated amount: Closed loop: 1,0 kg/MWh Open loop: 0,05 kg/MWh The amount depends on silt content in water and engine running profile

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Case study: Superspeed II ColorLine SuperSpeed II: Operates 100% within SECA 4 x 9,45MW Wärtsilä Space limitations in funnel Wärtsilä Inline Scrubber installation March 2014 at FaYard Based upon our investigations we needed to find an EGC system with scrubbers that could be fitted into the existing engine casing ColorLine

Case study: Superspeed II Replacing the silencers with Wärtsilä Inline scrubbers Funnel with silencers

Wärtsilä – added value partnership Summary Technology choice to suit the ship type and operational profile Turn-key supply capability trusted partnership survey and equipment selection engineering and project management procurement and equipment delivery installation, commissioning and certification through life technical, spares and service support Credible supplier to the marine and offshore sector Proven global support capability

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