Andritz’s submersible motor technology 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 results.
We are surrounded by gas. From water bottles to the insulation in our houses, pure gas is a key ingredient in just about each product we use day by day. 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 past decade alone.
The reasons for this trend are manifold, but the IGU determines three main factors. First, the price competitiveness of fuel in contrast to different power sources. Secondly, higher security of provide with regard to infrastructure, delivery, and versatile use. Thirdly, gas represents a sustainable form of power that may mitigate climate change and decrease localized air pollution. It has 50% fewer CO2 emissions in comparison with coal, for instance.
In order to satisfy this growing demand and use, the eco-friendly potential fuel should be extracted utilizing a sustainable course of. One of the biggest techniques is the Åsgard oil and gasoline area on the Haltenbanken, 200 km off the coast of Norway. It incorporates fifty two wells combined in sixteen gasoline fields and linked by 300 km of oil pipelines. As of December 2018, the sector has estimated assets of 9.9 million commonplace cubic meters of oil equal of oil and fifty one.1 million commonplace cubic meters of oil equal of gasoline.
The system used contains three essential areas: Åsgard A, B, and C. Cheap is a floating oil manufacturing vessel that has been anchored there completely since extraction began in 1999. Åsgard B is a floating, semi-submersible fuel and condensate processing platform for processing and stabilizing of gas 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 complicated to the north of Stavanger, Norway.
First on the planet Aker Solutions ASA has been supporting the Åsgard fuel area with various gasoline subject products, methods, and providers since 2010. In time, the strain in the storage facility in gas-producing fields drops. Compressors are needed to sustain 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 degree.
However, Åsgard is predicated on an underwater system. By using compressors on the seabed the recovery rates are improved and the investment and operating costs are decreased. In addition, underwater compression leaves a smaller ecological footprint and is extra reliable than a platform. The Åsgard system consists of modules for two equivalent sets of compressors, pumps, scrubbers, and coolers. The motors wanted to drive the pumps come from ANDRITZ.
Small, but important
In 2010, Ritz Pumpenfabrik GmbH in Schwäbisch-Gmünd, Germany, grew to become ANDRITZ Ritz GmbH and part of the ANDRITZ Group, as did the production of submersible motors. Due to the renewable winding, ANDRITZ submersible motors are suitable for driving deep nicely pumps, backside consumption pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the area of application, the motors could be made of cast iron, bronze or totally different type of stainless-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 particular cooling expertise. In designs with interior everlasting magnet motor expertise, or IPM for brief, these maintenance-free motors can achieve impressive outputs, efficiencies and, consequently, value 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 delivery is mounted at the decrease shaft end of the rotor. One of its two major tasks is cooling and lubricating the close by thrust bearing. By doing so, the impeller ensures there’s a fixed move of cooling liquid in the proper course.
This liquid moves by way of the within of the motor from the bottom to the highest. The specially developed cooling channels outline the precise path over all heat sources to discharge the warmth successfully and systematically. At the top finish, the warmth from the liquid is then discharged by way of the motor’s outer wall. Here, it is transferred via the surface of the motor to the medium to be pumped.
The ANDRITZ submersible motors are only a tiny part of the underwater compressor system, however they are additionally a particularly important part. The entire underwater station cannot function without these motors to drive the pumps. Since first being installed in 2016, these submersible motors have been operating with none faults. All in all, ANDRITZ Ritz delivered three twopole submersible motors with an output of 736 kw. The motor forms the condensate unit along with the pump and conveys these liquids which may be removed by the separator upstream of the gasoline compressors.
In 2017, because of a failure in part of the system which was not provided by ANDRITZ, the motor was sent in for repairs, throughout which an extensive research was performed. Thermal distribution in the cooling move and the recent spots have been analyzed in more detail. The outcomes also led to the design of a model new plate crosssection for the rotor plates.
Because of this, the motor to be repaired was also fully overhauled and fitted with a new winding and a new rotor. This examine and the implementation of its findings not only benefit the present buyer and future customers on this case, but additionally strengthen confidence in the ANDRITZ submersible motor expertise.
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