By Eric Haun at January 28, 2015 13:30
EPA has released a penalty policy for ECA violations. [More]
Results of an extensive atmospheric research project carried out in 2010 have now proved California’s clean-fuel regulations (applied within 24 miles of the coast since July 2009) have been effective in reducing Sulphur Dioxide air pollution from ships. In a recent press release, Chairman of California Air Resources Board, Mary D. Nichols declared this as good news for California, and for the nation. But there is a downside to that good news; the procedure of fuel-switching from heavy fuel (HFO) to low-sulfur distillate fuel oil (LSDFO) carries a risk of engine shutdown or malfunction, and the frequency of these incidents is on the increase.Spearheaded by scientists aboard NOAA research ship Atlantis the composition of emissions from more than 70 ships over 24 days was analysed during the ARB federal-state research project, and within that timeframe researchers also found that all ships were burning low-sulfur fuel. Assuredly, for economy, the majority had switched fu... [More]
The Ship Operations Cooperative Program (SOCP) has released its recently completed study on Exhaust Gas Cleaning System (EGCS). [More]
Tags: exhaust, exhaust, fuel, fuel, low sulfur, low sulfur, SOCP, SOCP, EGCS, EGCS, ECA, ECA, emissions, emissions
'Refiners threaten anti-pollution efforts in shipping', blared the caption of a Reuters article by correspondents Kan and Fabi on 17, January 2011, then coincidentally, came news a couple of days later that Wärtsilä was to retrofit the Containerships Vll, 13,995 dwt, (owned by Helsinki based Containerships Ltd. OY) with their diesel engine exhaust-gas scrubber. Wärtsilä's first ever installation of a commercial marine scrubber (to serve their W7L64 main diesel engine) is intended to enable the ship to meet impending targets for reduced exhaust gas emissions of SOx in Emission Control Areas's while continuing to burn diesel fuel with sulfur content above the set limits.
Containerships Vll: Photo Credit, Jens Boldt
Bunkers With Minimal Sulfur to Become Scarce?
Experts in the field pronounce that SOx emissions in diesel engine exhaust gas‚ which mostly comprise sulphur dioxide with a small amount of sulphur trioxide‚ are a function of the amount ... [More]
Tags: refineries, IMO, SOx, emissions, exhaut gas, diesel engine, scrubber, scrubbers, sulfur oxides, alternative fuels, anti-pollution, LNG, LPG, bio-fuels
Ship Architects, Inc. is a company that specializes in providing shipyards and owners with technical solutions in conceptual and detailed vessel design, project management, and other associated services. Wärtsilä is the leader in dual-fuel technology that allows its propulsion solutions to be operated on a variety of fuel types, including clean natural gas. The companies have together developed a new concept of towboat design that employs Wärtsilä 20DF and 34DF dual fuel engines for propulsion. [More]
Marine Diesel engines have a remarkable ability to work with a variety of fuels, ranging from Heavy Fuel Oil (HFO) to Liquid Natural Gas (LNG) as well as a range of distillates of refined crude oil in between. Not surprisingly the ship-owner's fuel of choice for large two-stroke Diesel engines over the years has been HFO, the low-price by-product of oil refinery output. Onboard fuel oil treatment being taken care of by purifiers/calorifiers prior to fuel injection, and more recently by advanced computer driven fuel cleaning systems.Unfortunately HFO is high in nitrogen, sulfur and ash, greatly increasing the NOx and SOx content in marine Diesel engine exhaust gas emissions, a fact which has led pollution control agencies worldwide – IMO, EU and other, localised, Emission Control Areas (ECA) – to set progressively exacting limits in revised MARPOL VI.A bleak future for ship-owners who were not already planning for year 2015 (when sulfur limits in the ECA's will be rest... [More]
As emission requirements become stricter as the years pass, the question arises, what to do with older engines. The EPA Marine Engine Re manufacture Program introduces a law effective March 2008 to force operators of older ship engines to upgrade them to reduce emissions. The rules are rather limited, specifying that the improvement must reduce particulates (PM) by at least 25 per cent, that the engines concerned are commercial (not recreational) applications, manufactured after 1973, over 600kW, cylinder displacement under 30 liters and be a US flagged vessel. The upgrade only becomes compulsory if there is an EPA approved upgrade available and must be carried out at the next scheduled ‘re manufacturing event’ e.g. replacing cylinder liners. Changing many parts to effectively convert an old engine into a new model is usually not economic, nevertheless changing some parts can make a significant reduction in emissions. Although other ways to achieve the same end of reduced emissions are changing fuels, fuel additives or adopting an after treatment system. [More]
Lower exhaust emissions of large bore diesel engines without after treatment, can be realized by increasing the mean effective pressure. One way to achieve a higher m.e.p. is to increase the boost pressure of the turbocharger however standard turbo designs are already at or approaching the limit of their capability to go from atmospheric pressure to the desired boost pressure in one unit: the solution is therefore to use two turbo stages. Simply, it comprises a low pressure turbine feeding via an inter cooler a second high pressure turbine which in turn passes through a second inter cooler to the engine. Control of a two stage turbo system including the suppression of compressor surging.is complex and is effected with the aid of variable nozzle rings (VTA) and bypasses. MAN Diesel & Turbo have recently announced their own series of two-stage turbos called the New TCX Generation. Using a configuration with the turbos at 90 degrees to each to provides a compact solution and reduce the amount of piping. [More]
Projects running with NYK Line ships under the Japanese Ministry of Land, Infrastructure, Transport and Tourism are investigating technological developments to curtail CO2 emissions from marine vessels. In the main project, two NYK ships, are equipped with an air blower to supply air to the vessel's bottom to reduce frictional resistance. Mitsubishi Heavy Industries supplied the engines and is also participating in the experiment. It was decided that, a module carrier, would be best type of vessel for this experiment. she has a wide, shallow-draft hull minimizing the energy required by the electrically blower supplying air to the vessel's bottom and should better retain the supplied air under the vessel's bottom. [More]