July 2, 2009 – 13:46
The world’s most sea worthy ships – container ships, tankers, bulk carriers, cruise ships and so forth – are also significant sources of air pollution. Not surprisingly, the U.S. Environmental Protection Agency has announced plans to reign in ship-based air pollution by imposing a stringent rule for emissions from large U.S.-flagged ships.
The proposed rule would set ambitious engine and fuel standards in an effort to bring U.S. regulations into harmony with international standards and reduce air pollution in U.S. cities and ports. The rule adds muscle to the recent decision by the U.S. and Canada to designate thousands of miles of the two countries’ coasts as an Emission Control Area.
There are two types of diesel engines used on oceangoing vessels. The main propulsion engines on most oceangoing vessels are very large “Category 3″ marine diesel engines (those with per-cylinder displacement at or above 30 liters). Auxiliary engines on oceangoing vessels typically range in size from small portable generators to locomotive-size engines with power of 4,000 kilowatts or more. Auxiliary engines on U.S.-flagged oceangoing vessels are subject to EPA’s marine diesel engine standards for engines with per-cylinder displacement up to 30 liters per cylinder.
Industry has already developed strategies for complying with the new regulations. One of the most compelling solutions is a technology called “cold-ironing,” which allows a specially equipped vessel to plug in to local power grids while tied onshore. The vessel can then draw power for its pumps, communications, ventilation, lighting and other needs from Southern California Edison, instead of its own diesel engines. Providing shore power to an off-loading oil tanker is the pollution-reducing equivalent of removing 187,000 cars from the road for a day. In a year, shore power will eliminate more than 30 tons of pollution. The picture featured below shows a vessel owned by BP, which uses “cold ironing.”
The BP shore power installation delivers enough electricity to power about 5,500 homes — up to 8 megawatts at 6,660 volts. The Alaska Tanker Company has equipped two of vessels that regularly visit the Port to be able to plug into the BP Terminal on Pier T, which supplies local refineries with crude oil. The joint project, which was undertaken voluntarily, was completed at a cost of $23.7 million — $17.5 million from the Port and $6.2 million from BP.
Prior to its modification, the Alaskan Navigator burned nearly 10,000 gallons of diesel each day in port to power massive pumps needed to off-load its oil. The Pier T project cost $23.7 million to build – $17.5 million from the Port and $6.2 million from BP – and took three years to complete.
Posted in Climate-Change, EPA, Electricity, Global Warming, Industry-News, law | No Comments »