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[Ãâó : KISTI ¹Ì¸®¾È(http://mirian.kisti.re.kr) ¡º±Û·Î¹úµ¿Çâºê¸®ÇÎ(GTB)¡»2013. 11. 20]




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Siemens developing power technology for deep sea oil and gas facilities




Siemens is developing power technology for deep sea, self-sufficient oil and gas extraction facilities. 

Located thousands of meters under water, these factories will need to operate reliably for several decades. 

As an example, beginning in 2020, Statoil plans to build oil and gas extraction facilities deep under water.

Subsea facilities are currently only set up in relatively shallow waters. In these systems, power cables and pipes connect pumps that are distributed across the seafloor to a floating platform. 

This technology can be used to extract about 40% of a raw material reservoir. However, self-sufficient deep sea factories could increase the rate to 60%, Siemens says.

These factories pump oil or gas directly out of the wells and compress the gas before transporting it to the surface. 

The facilities¡¯ power supply units (transformers, frequency converters, and switchgear) are also under water, where they provide the correct voltage. 

As a result, they can supply power to more pumps than surface systems. 

The only connections between the deep sea and the surface are a pipeline and an electricity and data cable.

However, there is still no empirical data about the high water pressure¡¯s long-term effects on transformers and other network components.

To address this, the Siemens research center near Trondheim is ensuring the reliability of the deep sea power network by putting the components into a pressure chamber, where they have to withstand up to 460 bars (6,672 psi) for several months. 

This pressure is equivalent to the pressure found 4,600 meters (15,000 feet) under water.

The researchers put the individual components into oil-filled pipes that are then placed inside the pressure chamber. 

The completed facilities will also be filled with oil instead of being installed into conventional air-filled housings.

The oil offsets the high pressure and has better cooling and electrical insulation properties than air, allowing the deep sea facilities to be more compact than would otherwise be the case. 

Special aging tests ensure that the parts will last for at least 20 years. Only components that pass all of the tests and the subsequent inspection are installed into the electricity network components.

Siemens has already assembled the first deep sea transformer in Trondheim. A switchgear system will be completed by the end of the year, and a frequency converter is scheduled to be finished by the end of 2014.




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