Waste Heat Recovery Systems (WHRS) from specialist suppliers are becoming increasingly popular to boost the overall plant efficiency of large container ship propulsion installations, reducing fuel consumption and thus carbon dioxide emissions. This is evidenced by ABB’s recent US$23-million order to supply no less than fourteen new 8,800 TEU ships with their WHRS package.
MSC Container Ship: Photo credit ABB
The first seven post-panamax vessels will be built at Dalian Shipbuilding Industry Co. Ltd., (DSIC) and the other seven vessels at New Times Shipbuilding Co. Ltd., for China International Marine Containers Group Co. and Mediterranean Shipping Co. S.A (MSC). ABB say that their scope of supply includes power turbines with control valves, alternators, reduction gears and dynamic compensators. The package also includes two of their latest generation of turbochargers. The electrical output of the system is 1.65 megawatt (MW).The combination of large main engine size and high onboa... [More]
Tags: Waste Heat Recovery System, WHRS, container ships, slow-speed, marine diesel engine, ABB, contract, MSC, propulsion plant, engine efficiency, fuel saving
Fuel saving with cost-effective exhaust gas emissions reduction was recently documented by two American ferry operators who installed the UltraBurn® Combustion Catalyst System in vessels plying routes in the Pacific Northwest. Houston-based Emissions Technology (ETI) provided the system for the main and auxiliary diesel engines of the three public authority ferries.
M/V Guemes Island Ferry: Photo credit CCL Dustin Creviston
Skagit County Ferry Operations Division reported a reduction in black smoke of over 43% and double digit reductions in other emissions aboard their M/V Guemes Island Ferry earlier this year. More recently Pierce County Public Works and Utilities Division recorded fuel cost savings of 32% during a six month working period (ending September 2013) by their ferries M/V Steilacoom II and M/V Christine. How does the system work?Basically the UltraBurn Combustion Catalyst System improves heavy duty diesel engine performance by stimulating a more complete burn th... [More]
The maritime-shipping industry has also been forced to contend with the key issues of energy efficiency and sustainability. Optimizing the trim of a ship is a good way to achieve lasting reductions in fuel consumption. In fact, trim optimization has been an object of investigation since the 1990s. Back then, forward-thinking German shipowners were using models in towing tests designed to determine the trim that produced the lowest resistance as a ship moved through water. These tests showed that in many cases a slightly lower forward draft yielded the ideal trim. Based on these findings, INTERSCHALT added a ballast optimization tool to its MACS3 loading computer system. However, over the next 15 years interest in this special module declined because the costs for conducting the associated towing tests proved to be too high.
Significant fuel saving by trim optimization
"Determining the optimum trim is one thing; being able to practically apply these findings in actual ship operation is... [More]
Damen Shiprepair & Conversion has developed a new innovative product, the ‘Quick Docking/Fuel Saving’ package. This offers owners a fast and low-cost additional docking with the sole aim of reducing fuel consumption in between the five-year statutory survey period.
The first vessel booked under the new concept has docked at Damen Shiprepair Brest (France). It is the capesize bulker ‘Castillo De Catoira’ operated by Spanish company Empresa Naviera Elcano. Damen expects to bring more of its vessels to its ship repair yards.
Jos Goris, Managing Director of Damen Shiprepair Brest and initiator of the concept, comments: “We know that hull resistance builds up during years of service and this can have a significant impact on performance and consequently, fuel costs. By introducing this product, we are thinking along with our customers and know that fuel costs are a major consideration for shipowners and charterers, especially in this economic climate.”... [More]
Weather forecasts are plentiful and readily available but there is very little information available to mariners about the ocean i.e. ocean currents, tides, waves and other phenomena. Tidetech was founded in order to fill this 'black hole' of oceanographic data by commercially creating data products to help improve the choice of routing of ships by making the most favourable use of tides and currents (weather conditions too) for the voyage in hand. Fuel savings at extremely low cost thus become available to the ship operators.
Routing display, North Atlantic track: Image courtesy of Tidetech
Tidetech has now teamed up up with Computer Aided Engineeringsoftware specialists NAPA to supply tidal current prediction data for route optimisation, initially for South East Asia and UK–Europe. The companies decided to join hands after a successful three-months trial aboard a cruise ship using Tidetech’s Singapore and Malacca Straits models.This new agreement between Tidetech an... [More]
Variable Turbine Area (VTA) geometry for the largest exhaust-gas turbochargers, introduced by MAN Diesel & Turbo about four years ago, recently topped the hundred sales mark according to the manufacturers, as the technology gradually proved itself effective in reducing fuel-oil consumption in medium and low-speed marine diesel engines.The VTA is designed for fitting on supercharged large-bore diesel engines with varying load profiles. Due to its adjustability, the VTA efficiently adapts to a wide range of engine operations, making it particularly useful for the present-day trend to slow-steam bulkers, tankers and container ships.MAN say that the first VTA unit delivered has so far accumulated over 20,000 operating hours running on engines using heavy fuel oil (HFO) to give fuel consumption savings of up to 5 g/kWh.VTA Turbocharging
VTA technology enables the quantity of charge air to be more precisely matched to the quantity of fuel injected, encouraging reduced specific fuel co... [More]