Hoegh LNG FPSO
Hoegh LNG
Scope of Work
FEED and Liquefaction Technology
Summary
The Hoegh LNG FPSO design consisted of a ship-shaped offshore-classed structure based on an existing LNG ship specification, with the capacity to treat and liquefy a well stream of approximately 3.0 billion m3 per year. This will give an annual production of between 1.6 to 2.0 million tons of LNG and approximately 0.4 million tons of LPG/condensate, depending on the specification of the gas stream. The design is such that it can be expanded to 2.4 million tons per year of LNG or reduced to 1.0 million tons per year.
The LNG FPSO has a storage capacity of 190,000 m3 of LNG and 30,000 m3 of LPG/condensate. Daewoo Shipbuilding & Marine Engineering performed the FEED for the hull, utilities and integration work. McDermott performed the FLNG topsides design, which included overall FLNG responsibility for HSE, FLNG automation, control system design, and the electrical power generation and distribution system.
The topsides process system downstream of the turret included the inlet system with slug catcher, condensate separation and stabilization, gas treatment including acid gas removal, dehydration and mercury removal, NGL extraction and the NicheLNG® liquefaction system. The topsides further included boil-off gas management, fuel gas treatment, cooling water circulation, main power generation and heating medium by WHRUs.
The topsides were developed based on a modular concept suitably sized (weight and dimensions) to be sea transported and lifted on deck by floating crane barges available in major shipyards around the world. This modular concept allowed for a flexible execution strategy with respect to module fabrication location and integration. Interfaces for structural, piping and E&I were all identified. This included technical interfaces between modules, and also between modules, hull and turret scope of work.
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