Page 42: of Offshore Engineer Magazine (Nov/Dec 2022)

41 43

FEATURE FLO ATING POWER

Seafloat “You cannot simply put a gas turbine constructed for land-based applications on a ?oating vessel,” Zissis says, adding that SeaFloat GPPs are “marinized” tech “opti- mized” and specially made “to withstand motions, accel- erations, and hull de?ections”.

“The gas turbine and steam turbine packages are in- stalled on three-point mounted frames, forming single-lift structures that facilitate and expedite the installation and erection efforts at the shipyard. It’s like putting together big LEGO bricks,” he says. SeaFloats, he adds, are “wet- or dry-towed” from the shipyard. The barge’s layout and size are dependent on whether the unit is fully integrated with

Floating power: the arrival in downtown Santo

LNG storage, regasi?cation and power plant — the Sie- !

energy storage.

mens FSRP concept — or related to power output.

The 150-megawatt (MW) combined-cycle Estrella del

Siemens Energy

Mar III began powering the Dominican Republic with its two SGT 800 gas turbines in 2022, two years after be- ing ordered. It has “5 to 10 megawatts” of power from energy storage onboard for “primary frequency response”.

SeaFloats mainly come in 145/150 MW, 220 MW, and 300 MW models — increasable by lifting aboard more “blocks”, modules that might in future be hydrogen elec- trolysers to enable both H2 and ammonia production. The

LNG storage capacity can reach 180,000 m3. The barge it- self can be ?oating, ?xed, or bound to a mooring dolphin, a steel construction piledriven into the sea or river bed and visible above water.

The Estrella del Mar III is reportedly “quieter” than downtown Santo Domingo, where it’s moored. Its size

Building blocks: — 80m x 35m — is half the size of a comparable, land- showing modular process-plant placement. based plant.

Illustration: Siemens Energy

Shipyard-capable At-anchor: a mooring dolphin used to 2021 when completed in Singapore. secure a FPP.

Siemens Energy Greens Bayou Pipe Mill 42 OFFSHORE ENGINEER OEDIGITAL.COM