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Boosting Energy Efficiency - 16 Pages

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Catalogue excerpts

BOOSTING ENERGY EFFICIENCY

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BOOSTING ENERGY EFFICIENCY AT SEA Fuel consumption is becoming a critical issue as the price of energy rises and the need to cut emissions is evident. This brochure contains some selected examples of actions and measures to reduce energy consumption in ship applications. The aim is to cut operating costs while, at the same time, reducing emissions. Considerable research and development investments have placed Wärtsilä in the vanguard of companies offering innovative technologies to boost energy efficiency and environmentally sound operation at sea. Even though these measures may make a significant...

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TANKERS AND BULKERS Tankers are designed to transport liquid bulk cargo. There are different tanker categories, depending on the type and amount of cargo. Product and chemical tankers usually represent the smaller end of the tanker segment with sizes ranging from a few thousand tons up to 50,000 DWT. At the other end of the spectrum, crude oil carriers can reach sizes of over 400,000 DWT. Crude carriers can be divided into subtypes such as Panamax, AfraMax, Suezmax, VLCC and ULCC, depending on their size. Bulkers are for transporting dry bulk cargoes such as ore, grain and coal. The holds have...

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VOYAGE PLANNING – WEATHER ROUTING Optimizing the ships route and schedule to take into account wheater and sea conditions will reduce the fuel consumption for a trip. WIND POWER Sails, kites or Fletner rotors can be used to harness the energy in the wind an give part of the forward driving thrust for the ship. AIR LUBRICATION An air carpet in the bottom of the hull reduces the frictional resistance between the water and the hull surface. HULL CLEANING Cleaning the hull reduces the frictional resistance. OPTIMUM MAIN DIMENSIONS By optimizing the ship’s main dimensions the hull resistance can be...

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CONTAINER VESSELS Container vessels are designed specifically for the efficient transport of containerised cargo. Smaller feeder vessels have a capacity ranging from a few hundred TEU to about 3000 TEU. Main line vessels which operate all round the world between the major container hubs have capacities exceeding 6000 TEU, with the largest today being over 14,000 TEU. The trend is towards ever increasing size, which gives benefits not simply in the economy of scale but also in the efficiency of scale. A 10% increase in ship size will increase transport efficiency by 4-5%. Container transport typically...

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AUTOPILOT ADJUSTMENTS Self tuning, adaptive autopilots improve the ships overall performance. SHIP SPEED REDUCTION Reducing ship speed is an efficient way to cut energy consumption. HULL SURFACE – HULL COATING Smoother and harder coatings with less fouling reduce the frictional resistance. EFFICIENCY OF SCALE Increasing the ship size will in most cases result in a clear increase in transport efficiency. BOW THRUSTER SCALLOPS/GRIDS Correct location and design of scallops or grids for all hull openings result in lower resistance. consumers on the ship. Auxiliary engine configuration is typically...

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CONDITION BASED MAINTENANCE (CBM) Real-time monitoring and evaluation of all systems reduces fuel consumption among other things. ROROS RoRo vessels are designed to transport wheel-based cargo or cargo loaded with wheel-based equipment. Efficient loading and unloading methods are characteristic of RoRo vessels and the cargo is usually moved over large shore ramps. The most common categories of RoRo vessels are Short Sea RoRo, Pure Car (and Truck) Carriers (PCTC), deep sea RoRo and combined RoLo vessels. Short sea RoRos often operate on fixed routes with regular departures, while deep sea RoRo...

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SOLAR POWER Converting solar power into electricity and heat for ship use reduces the total fuel consumption. ENERGY SAVING OPERATION AWARENESS Energy saving culture among crew can reduce the ship total energy consumption. REDUCE BALLAST Reduced ballast results in lighter displacement and thus lower resistance. VESSEL TRIM ADJUSTMENT By optimizing the vessel trim during voyage the total propulsion power demand can be reduced. also include solar power. The solar cells could then advantageously be located on the large surfaces on the superstructure of a PCTC. The world wide operation of a PCTC can...

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TURNAROUND TIME IN PORT Fast port turnaround time enables decrease of vessel speed at sea. INTERCEPTOR TRIM PLANES An Interceptor creates a lift effect that reduces the propulsion power demand. COOLING WATER PUMPS, SPEED CONTROL Variable speed operation of pumps optimizes the pump energy consumption. PROPULSION CONCEPTS – CRP Counter rotating propellers have a very high efficiency. FERRIES Ferries transport a mix of wheel-based cargo, cars and passengers. The ferry types used today cover everything from high speed crafts and small double end ferries to large RoPax vessels and luxury cruise ferries....

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LIGHTWEIGHT CONSTRUCTION Lightweight materials such as aluminum can be used in the superstructure to save weight and reduce fuel consumption. CODED MACHINERY CODED machinery combines the features of electric and mechanical propulsion to offer the best efficiency for ship with varying operating profiles. give a most varying operating profile and make optimisation more difficult. Ferries have frequent port calls, and reducing the turn-around time in port allows for a clear reduction of speed at sea. Good manoeuvring and efficient cargo handling is therefore of utmost importance. Cargo can be loaded...

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OFFSHORE SUPPORT VESSELS Offshore support vessels can be divided into the following sub-types, according to their operating functions: platform supply vessel (PSV), anchor handler tug (AHT), anchor handling tug and supply (AHTS), construction and field development vessel, stand-by vessel and various combinations of these. OSVs are characterised by the fact that they perform multiple tasks. They are often also designed to function in very rough weather conditions. The speed of the vessels is usually quite low, but the short hull length means the Froude number is relatively high. The bow and bulb...

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