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Compressed Natural Gas Shipping Could Offer New Energy Options
The United States is facing constraints in its supply of natural gas, and energy projections from DOE's Energy Information Administration now assume that a natural gas pipeline from Alaska will start production in 2015, while imports of liquefied natural gas (LNG) will increase from 0.6 trillion cubic feet in 2004 to 4.1 trillion cubic feet in 2025. That's because aside from pipelines, the only way to import natural gas is to first liquefy it into LNG for shipping. Until now, that is.
Sea NG Corporation, a Canadian company, announced on September 19th that the American Bureau of Shipping (ABS) has given design approval to a ship that will carry compressed natural gas (CNG) in 10-mile-long coils of 6-inch-diameter pipe. ABS, a non-profit corporation that sets safety standards for the marine industry, says that Sea NG plans to award contracts later this year for the construction of three CNG ships. Each ship will carry 16 coils of pipe containing a total of 50 million cubic feet of natural gas. These first three CNG ships are intended to service projects in the Caribbean or Mediterranean seas. Sea NG says the ships are meant to deliver CNG over moderate distances, up to about 1,250 miles, and require minimal on-shore facilities. In contrast, LNG import facilities require significant investments, and some proposed U.S. facilities have faced significant resistance from local residents. Whether CNG shipping can change the outlook for natural gas supplies to the United States remains to be seen, but at least the technology provides another import option. See the press releases from Sea NG and ABS.