Andritz’s submersible motor know-how success

In one of the world’s largest oil and gasoline fields, the firstever underwater compressor system employs ANDRITZ submersible motors. With their renewable winding these maintenance-free designed pumps have achieved spectacular outcomes.
We are surrounded by gas. From water bottles to the insulation in our homes, natural gasoline is a key ingredient in virtually every product we use daily. According to the most recent report issued by the International Gas Union (IGU) in 2019, the worldwide demand in gas has been rising by 35% of the past decade alone.
The causes for this trend are manifold, however the IGU determines three major components. First, the price competitiveness of fuel in contrast to different power sources. Secondly, larger safety of supply with regard to infrastructure, delivery, and versatile use. Thirdly, gas represents a sustainable form of power that can mitigate climate change and decrease localized air pollution. pressure gauge octa has 50% fewer CO2 emissions compared to coal, for instance.
In order to fulfill this growing demand and use, the eco-friendly potential fuel must be extracted utilizing a sustainable course of. One of the most important techniques is the Åsgard oil and gasoline area 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 sources of 9.9 million commonplace cubic meters of oil equivalent of oil and fifty one.1 million normal cubic meters of oil equivalent of gasoline.
The system used contains three essential areas: Åsgard A, B, and C. Åsgard A is a floating oil production 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 advanced to the north of Stavanger, Norway.
First in the world Aker Solutions ASA has been supporting the Åsgard gas subject with various gasoline area merchandise, methods, and providers since 2010. In time, the stress 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 so as to enhance the output to 306 million barrels. These are usually put in on platforms above sea degree.
However, Åsgard is predicated on an underwater system. By using compressors on the seabed the restoration rates are improved and the funding and working prices are lowered. In addition, underwater compression leaves a smaller ecological footprint and is more dependable than a platform. The Åsgard system consists of modules for two similar sets of compressors, pumps, scrubbers, and coolers. The motors wanted to drive the pumps come from ANDRITZ.
Small, but essential

In 2010, Ritz Pumpenfabrik GmbH in Schwäbisch-Gmünd, Germany, grew to become 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 properly pumps, bottom intake pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the realm of utility, the motors could be manufactured from forged iron, bronze or totally different type of chrome steel and installed either 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 inside everlasting magnet motor expertise, or IPM for brief, these maintenance-free motors can achieve spectacular outputs, efficiencies and, as a result, cost savings.
The efficient and measurable motor cooling system keeps the inside temp- erature as low as possible. Drinking water is used as a cooling liquid, which is why the motors can function in media of as a lot as 75° C. An impeller with optimized suction and supply is mounted at the lower shaft finish of the rotor. One of its two primary tasks is cooling and lubricating the nearby thrust bearing. By doing so, the impeller ensures there is a constant flow of cooling liquid in the proper path.
This liquid strikes via the inside of the motor from the bottom to the top. The specifically developed cooling channels define the precise path over all heat sources to discharge the warmth effectively and systematically. At the top finish, the heat from the liquid is then discharged via the motor’s outer wall. Here, it is transferred via the floor of the motor to the medium to be pumped.
The ANDRITZ submersible motors are only a tiny a half of the underwater compressor system, but they are additionally a particularly essential part. The entire underwater station cannot operate with out these motors to drive the pumps. Since first being put in in 2016, these submersible motors have been working without any faults. pressure gauge 10 bar in all, ANDRITZ Ritz delivered three twopole submersible motors with an output of 736 kw. The motor varieties the condensate unit together with the pump and conveys these liquids that are removed by the separator upstream of the fuel compressors.
In 2017, due to a failure in part of the system which was not supplied by ANDRITZ, the motor was despatched in for repairs, throughout which an in depth examine was carried out. Thermal distribution in the cooling move and the hot spots were analyzed in more element. The results also led to the design of a brand new plate crosssection for the rotor plates.
Because of this, the motor to be repaired was additionally fully overhauled and fitted with a model new winding and a brand new rotor. This study and the implementation of its findings not solely profit the present customer and future clients in this case, but in addition strengthen confidence in the ANDRITZ submersible motor expertise.

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