GE COGES Wins ABS AiP for LNG Carrier

September 9, 2016 in Dual Fuel, LNG, Marine, Technology by Rich Piellisch  |  No Comments

Turbine Power Means More Space for LNG Cargo

GE’s Marine Solutions organization says it’s received an ABS/American Bureau of Shipping AiP/approval in principle with China’s Hudong-Zhonghua Shipbuilding for a jointly developed liquefied natural gas carrier design to be powered by GE’s combined gas turbine electric and steam system.

‘Customers can realize an additional 4,000 cubic meters of LNG cargo space versus a traditional 174,000-cubic-meter LNG carrier powered by dual fuel diesel engines.’

‘Customers can realize an additional 4,000 cubic meters of LNG cargo space versus a traditional 174,000-cubic-meter LNG carrier powered by dual fuel diesel engines.’

The COGES design employs a power LM2500 turbine engine, allowing more room on the ship for LNG cargo. It is an “aeroderivative” engine based on the CF6 series of engines powering thousands of jet aircraft.

The COGES arrangement is fully 80% lighter and 30% smaller than comparable two-stroke diesels, GE says.

‘Customers Can Now Procure’

“With AiP in hand from ABS, customers can now procure this LNG carrier that is capable of meeting Tier III International Maritime Organization and Tier 4 United States Environmental Protection Agency emissions requirements today,” GE marine operations VP Brien Bolsinger said in a release.

GE Marine's LM2500 turbine engine

GE Marine’s LM2500 turbine engine

“Thanks to the compact and lightweight attributes of GE’s COGES arrangement, customers can realize an additional 4,000 cubic meters of LNG cargo space versus a traditional 174,000-cubic meter LNG carrier powered by dual fuel diesel engines,” Hudong-Zhonghua president Chen Jun says in the GE announcement.

Boil-Off Gas or MGO/Diesel

“Also, since the GE gas turbine is dual fuel-capable, it can operate either on the carrier’s cargo of boil-off gas or on marine gas oil to provide for all power and propulsion,” he said.

“New technologies and innovations are essential ingredients for sustainable growth of the marine industry and protection of our natural environment,” ABS Greater China engineering VP Bill Shi says in the GE release.

http://hhpinsight.com/wp-content/blogs.dir/2/files/2015/07/GE-COGES-1200.jpg

GE supplied this graphic last year to help illustrate the savings possible with the combined gas turbine electric and steam system utilizing gas-fired turbine propulsion on LNG carriers. At that time GE and partner Hyundai Heavy Industries secured an AiP for the COGES system from Lloyd’s Register (HHP Insight, July 15, 2015).

“By evaluating this new design concept jointly developed by Hudong-Zhonghua and GE and granting this milestone AiP, we have acknowledged that the eco-friendly propulsion system is in compliance in principle with the requirements of the ABS standards and international regulations.”

‘Maintenance Is Also Easy’

In addition to being lighter and smaller, the COGES system offers customers “lower life cycle costs, negligible lubricating oil consumption, no methane slip, [with] no pilot fuel or exhaust treatment required,” GE says.

“Maintenance is also easy since little is required with COGES; only about 300 man-hours per year while the ship is underway. When more extensive maintenance is required, the entire turbine can be removed and replaced within 24 hours, reducing downtime and enabling maintenance to be carried out with minimal interruption to ship operations.”

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Source: GE Marine Solutions with HHP Insight follow-up

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