GEV eyes orders for new CNG carrier design in 2019

ABS awarded full Design Approval to GEV for its CNG Optimum ship (CNG-O-200) in January 2019. ABS awarded full Design Approval to GEV for its CNG Optimum ship (CNG-O-200) in January 2019.

Global Energy Ventures (GEV), a developer of global integrated compressed natural gas (CNG) projects, is planning to order four CNG carriers based on its CNG 200 Optimum design in the second half of 2019.

GEV has selected a shortlist of four potential shipyards from which it will select a preferred partner. The developer plans to move towards placing ship building contracts for four vessels in H2, subject to obtaining adequate financing and a secured CNG project.

The finalised ship orders will be based on GEV’s CNG 200 Optimum design, which received Approval in Principle from ABS on 25 January 2019. The CNG 200 Optimum draws heavily upon the previous Coselle CNG design, but proposes to store compressed natural gas horizontally, at pressures of 3,600 psi, within a series of 108m-long straight X80 pipeline grade seamless steel tubes, produced by Japan’s JFE. Japan’s Marubeni-Itochu is helping the consortium source the 140km of steel required for each vessel.

The Optimum Technology maximises the number of pipes stacked within the hull of the ship by employing a hexagonal horizontal stacking pattern and uses a proprietary system to prevent the horizontally stacked straight pipes rubbing together.

To avoid pressure from horizontally bowing tubes exerting pressure on the sides of the ship, the long straight pipes are packed tightly, using the friction between the pipes to prevent movement between the pipes themselves and between the pipes and the ship or barge. Vertical movement is prevented by gaps between the forcing beam and the pipes themselves, protected by shims to prevent movement.

This allows 200 million standard cubic feet of natural gas to be transported in a 96,000 m3 hull volume vessel, compared with a Coselle vessel of 180,000 m3. The 185m-long, 31m beam and 16.8m deep vessel displaces 45,600 dwt. The reduction in vessel size improves the potential economics of CNG vessels.

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