Andritz’s submersible motor know-how success

In one of many 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 impressive outcomes.
We are surrounded by gasoline. From water bottles to the insulation in our houses, natural gasoline is a key ingredient in nearly every product we use every day. According to the most recent report issued by the International Gas Union (IGU) in 2019, the worldwide demand in gasoline has been rising by 35% of the previous decade alone.
The causes for this pattern are manifold, however the IGU determines three main components. First, the price competitiveness of gas in contrast to different energy sources. Secondly, greater security of provide with regard to infrastructure, delivery, and versatile use. Thirdly, gasoline represents a sustainable type of vitality that may mitigate climate change and decrease localized pollution. It has 50% fewer CO2 emissions compared to coal, for example.
In order to fulfill this growing demand and use, the eco-friendly potential fuel must be extracted using a sustainable course of. One of the largest techniques is the Åsgard oil and gasoline area on the Haltenbanken, 200 km off the coast of Norway. It incorporates 52 wells mixed in 16 gas fields and linked by 300 km of oil pipelines. As of December 2018, the field has estimated resources of 9.9 million standard cubic meters of oil equal of oil and fifty one.1 million commonplace cubic meters of oil equal of fuel.
The system used comprises three important areas: Åsgard A, B, and C. Åsgard A is a floating oil manufacturing vessel that has been anchored there completely 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 gas pipeline to the Karsto processing complicated to the north of Stavanger, Norway.
First on the earth Aker Solutions ASA has been supporting the Åsgard gasoline subject with numerous gasoline area products, systems, and services since 2010. In time, the strain within 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 improve the output to 306 million barrels. These are normally put in on platforms above sea stage.
However, Åsgard relies on an underwater system. By using compressors on the seabed the recovery rates are improved and the investment and working costs are decreased. In addition, underwater compression leaves a smaller ecological footprint and is extra dependable than a platform. The Åsgard system consists of modules for 2 identical units of compressors, pumps, scrubbers, and coolers. The motors needed to drive the pumps come from ANDRITZ.
Small, however 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 consumption pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the world of software, the motors could be made of cast iron, bronze or totally different type of chrome steel and put in 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 interior permanent magnet motor expertise, or IPM for short, these maintenance-free motors can obtain impressive outputs, efficiencies and, as a result, value financial savings.
Wacky and measurable motor cooling system keeps the inside temp- erature as little as potential. Drinking water is used as a cooling liquid, which is why the motors can operate 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 main duties is cooling and lubricating the nearby thrust bearing. By doing so, the impeller ensures there’s a fixed flow of cooling liquid in the proper course.
This liquid moves through the inside of the motor from the bottom to the highest. The specifically developed cooling channels define the exact path over all warmth sources to discharge the heat successfully and systematically. At the highest end, the warmth from the liquid is then discharged via the motor’s outer wall. Here, it’s transferred via the surface of the motor to the medium to be pumped.
The ANDRITZ submersible motors are just a tiny part of the underwater compressor system, but they are also an especially necessary half. The whole underwater station can not operate with out these motors to drive the pumps. Since first being put in in 2016, these submersible motors have been working with none faults. All in all, ANDRITZ Ritz delivered three twopole submersible motors with an output of 736 kw. The motor types the condensate unit together with the pump and conveys those liquids which are removed by the separator upstream of the gas compressors.
In 2017, as a result of a failure in a part of the system which was not provided by ANDRITZ, the motor was despatched in for repairs, during which an extensive study was conducted. Thermal distribution within the cooling move and the hot spots have been analyzed in additional detail. 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 utterly overhauled and fitted with a brand new winding and a new rotor. This research and the implementation of its findings not only benefit the current buyer and future prospects in this case, but additionally strengthen confidence in the ANDRITZ submersible motor expertise.
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