Andritz’s submersible motor expertise success

In one of the world’s largest oil and gasoline fields, the firstever underwater compressor system employs ANDRITZ submersible motors. With เพรสเชอร์เกจลม winding these maintenance-free designed pumps have achieved impressive outcomes.
We are surrounded by gasoline. From water bottles to the insulation in our houses, pure gasoline is a key ingredient in nearly each product we use day by day. According to the newest report issued by the International Gas Union (IGU) in 2019, the worldwide demand in fuel has been rising by 35% of the previous decade alone.
The causes for this trend are manifold, however the IGU determines three primary elements. First, the price competitiveness of gas in distinction to other power sources. Secondly, higher security of supply with regard to infrastructure, delivery, and versatile use. Thirdly, gasoline represents a sustainable type of vitality that may mitigate climate change and lower 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 must be extracted using a sustainable process. One of the most important techniques is the Åsgard oil and gas field on the Haltenbanken, 200 km off the coast of Norway. It contains 52 wells mixed in sixteen gas fields and connected 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 51.1 million standard cubic meters of oil equal of gasoline.
The system used comprises 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 fuel 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 field with varied gasoline area products, methods, and providers since 2010. In time, the strain within the storage facility in gas-producing fields drops. Compressors are wanted to sustain the output. Aker delivered the first-ever underwater compressor system worldwide to Åsgard so as to increase the output to 306 million barrels. These are usually put in on platforms above sea stage.
However, Åsgard relies on an underwater system. By using compressors on the seabed the restoration 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 needed 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 production of submersible motors. Due to the renewable winding, ANDRITZ submersible motors are appropriate for driving deep nicely pumps, backside intake pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the world of application, the motors can be made of forged iron, bronze or different kind 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 particular cooling know-how. In designs with inside permanent magnet motor know-how, or IPM for brief, these maintenance-free motors can achieve spectacular outputs, efficiencies and, as a result, value financial savings.
The efficient and measurable motor cooling system keeps the interior temp- erature as little as possible. 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 supply is mounted at the lower shaft end of the rotor. One of its two primary duties is cooling and lubricating the close by thrust bearing. By doing so, the impeller ensures there is a fixed circulate of cooling liquid in the right path.
This liquid moves by way of the within of the motor from the bottom to the top. The specifically developed cooling channels define the precise path over all warmth sources to discharge the warmth 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 through 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 are additionally an especially important half. The complete underwater station cannot function with out these motors to drive the pumps. Since first being installed in 2016, these submersible motors have been working without any faults. All in all, ANDRITZ Ritz delivered three twopole submersible motors with an output of 736 kw. The motor varieties the condensate unit along with the pump and conveys those liquids which may be removed by the separator upstream of the gasoline compressors.
In 2017, as a result of a failure in a half of the system which was not provided by ANDRITZ, the motor was sent in for repairs, throughout which an intensive research was performed. Thermal distribution within the cooling circulate and the recent spots have been analyzed in more element. The results additionally led to the design of a model new plate crosssection for the rotor plates.
Because of this, the motor to be repaired was additionally fully overhauled and fitted with a new winding and a new rotor. This research and the implementation of its findings not solely profit the current buyer and future prospects on this case, but also strengthen confidence in the ANDRITZ submersible motor know-how.

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