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Dresser-Rand commissions liquefaction system

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Hydrocarbon Engineering,

Siemens’ Dresser-Rand business recently commissioned an LNGo-HP (high-pressure) micro-scale natural gas liquefaction system for Altagas Ltd in Dawson Creek, British Columbia, Canada. The modular, expandable LNGo technology enables efficient installation, especially in a demanding environment like Dawson Creek. With a capacity of approximately 30 000 gal./d of LNG, the Dawson Creek facility commenced production on 25 January 2018.

The scalability of the LNGo system enables Altagas to scale production in line with demand and minimise capital expenditures. The system allows consumers to convert from diesel and other fuels to natural gas, which provides the benefit of a smaller carbon footprint, lower operational cost, and market price stability.

Siemens’ scope of supply included one LNGo-HP system, site civil works, building construction, mechanical and electrical integration, commissioning, startup, and operator training. The LNGo system consists of modules that include two Siemens gas engines, two Dresser-Rand MOS reciprocating compressors, three Siemens MV motors, Siemens variable frequency drives, and associated auxiliaries. The plant, with a footprint of approximately 2500 m2, was deployed directly at the site.

The LNGo technology makes it possible to monetise stranded gas deposits due to its relatively low capital and operating costs. The system can be deployed in rough terrain or remote regions, eliminating the need to establish an expensive gas pipeline infrastructure or arrange for long-distance trucking of LNG from centralised plants to point of use. It can function as a decentralised solution where the requisite pipeline infrastructure is lacking, or as an onsite solution to reduce or eliminate flaring of petroleum gas at, for example, oil rigs or producing gas fields.

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