In one of many world’s largest oil and gas fields, the firstever underwater compressor system employs ANDRITZ submersible motors. With their renewable winding these maintenance-free designed pumps have achieved spectacular results.
We are surrounded by gas. From water bottles to the insulation in our houses, natural gas is a key ingredient in just about every product we use daily. According to the most recent report issued by the International Gas Union (IGU) in 2019, the global demand in gas has been rising by 35% of the previous decade alone.
เพรสเชอร์เกจน้ำ for this development are manifold, however the IGU determines three primary factors. First, the fee competitiveness of gasoline in distinction to different power sources. Secondly, larger security of provide with regard to infrastructure, delivery, and versatile use. Thirdly, gas represents a sustainable type of power that may mitigate climate change and decrease localized pollution. It has 50% fewer CO2 emissions compared to coal, for instance.
In order to fulfill this growing demand and use, the eco-friendly potential gas will have to be extracted utilizing a sustainable process. One of the largest techniques is the Åsgard oil and gas subject on the Haltenbanken, 200 km off the coast of Norway. It contains fifty two wells combined in sixteen fuel fields and related by 300 km of oil pipelines. As of December 2018, the sector has estimated assets of 9.9 million commonplace cubic meters of oil equivalent of oil and fifty one.1 million normal cubic meters of oil equivalent of gas.
The system used includes three essential areas: Åsgard A, B, and C. Åsgard A is a floating oil manufacturing vessel that has been anchored there permanently since extraction started in 1999. Åsgard B is a floating, semi-submersible fuel and condensate processing platform for processing and stabilizing of gasoline and condensate. This platform is supplemented by the condensate storage facility Åsgard C and the 707 km-long Åsgard fuel pipeline to the Karsto processing complex to the north of Stavanger, Norway.
First on the planet Aker Solutions ASA has been supporting the Åsgard fuel subject with numerous gasoline field merchandise, techniques, and providers since 2010. In time, the strain in the storage facility in gas-producing fields drops. Compressors are needed to maintain the output. Aker delivered the first-ever underwater compressor system worldwide to Åsgard in order to enhance the output to 306 million barrels. These are normally put in on platforms above sea stage.
However, Åsgard is based on an underwater system. By using compressors on the seabed the recovery rates are improved and the funding and working prices are reduced. In addition, underwater compression leaves a smaller ecological footprint and is extra dependable than a platform. The Åsgard system consists of modules for two similar sets of compressors, pumps, scrubbers, and coolers. The motors needed to drive the pumps come from ANDRITZ.
Small, however important
In 2010, Ritz Pumpenfabrik GmbH in Schwäbisch-Gmünd, Germany, turned ANDRITZ Ritz GmbH and part of the ANDRITZ Group, as did the manufacturing of submersible motors. Due to the renewable winding, ANDRITZ submersible motors are suitable for driving deep well pumps, bottom consumption pumps, suction pumps, seawater pumps, and underwater machinery.
Depending on the area of utility, the motors may be made of cast iron, bronze or totally different sort of chrome steel and installed both vertically or horizontally. These are water-filled and watercooled, three-phase asynchronous motors with squirrel cages and a mech- anical seal. They are fitted with MCT, a special cooling technology. In designs with interior permanent magnet motor know-how, or IPM for short, these maintenance-free motors can achieve impressive outputs, efficiencies and, consequently, value financial savings.
The effective and measurable motor cooling system retains the inside temp- erature as little as possible. Drinking water is used as a cooling liquid, which is why the motors can function in media of up to 75° C. An impeller with optimized suction and supply is mounted on the lower shaft finish of the rotor. One of its two major tasks is cooling and lubricating the nearby thrust bearing. By doing so, the impeller ensures there’s a fixed circulate of cooling liquid in the right path.
This liquid strikes by way of the within of the motor from the underside to the top. The specifically developed cooling channels outline the exact path over all heat sources to discharge the warmth effectively and systematically. At the top end, the warmth from the liquid is then discharged via the motor’s outer wall. Here, it’s transferred by way of the floor of the motor to the medium to be pumped.
The ANDRITZ submersible motors are only a tiny a part of the underwater compressor system, however they’re additionally an extremely essential half. The complete underwater station can not function with out these motors to drive the pumps. Since first being installed in 2016, these submersible motors have been operating without any faults. All in all, ANDRITZ Ritz delivered three twopole submersible motors with an output of 736 kw. The motor forms the condensate unit together with the pump and conveys these liquids which may be removed by the separator upstream of the gasoline compressors.
In 2017, as a end result of a failure in a half of the system which was not supplied by ANDRITZ, the motor was despatched in for repairs, throughout which an intensive study was performed. Thermal distribution in the cooling circulate and the hot spots were analyzed in more element. The outcomes additionally led to the design of a new plate crosssection for the rotor plates.
Because of this, the motor to be repaired was additionally completely overhauled and fitted with a brand new winding and a brand new rotor. This study and the implementation of its findings not only benefit the present customer and future clients on this case, but additionally strengthen confidence within the ANDRITZ submersible motor know-how.
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