Andritz’s submersible motor technology success

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 impressive results.
We are surrounded by fuel. From water bottles to the insulation in our properties, natural gasoline is a key ingredient in nearly 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 previous decade alone.
The reasons for this trend are manifold, but the IGU determines three primary elements. First, the price competitiveness of gas in contrast to different power sources. Secondly, higher safety of supply with regard to infrastructure, supply, and flexible use. Thirdly, gas represents a sustainable type of energy that can mitigate climate change and decrease localized pollution. It has 50% fewer CO2 emissions compared to coal, for example.
In order to meet this rising demand and use, the eco-friendly potential gas should be extracted using a sustainable course of. One of the largest techniques is the Åsgard oil and fuel area on the Haltenbanken, 200 km off the coast of Norway. It accommodates fifty two wells mixed in sixteen fuel fields and related by 300 km of oil pipelines. As of December 2018, the field has estimated sources of 9.9 million standard cubic meters of oil equivalent of oil and 51.1 million normal cubic meters of oil equal 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 began in 1999. Åsgard B is a floating, semi-submersible gas 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 on the planet Aker Solutions ASA has been supporting the Åsgard fuel subject with numerous gasoline field merchandise, systems, and services since 2010. In time, the stress in 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 to find a way to increase the output to 306 million barrels. These are normally installed on platforms above sea degree.
However, เกจ์วัดแรงดันน้ำ is based on an underwater system. By utilizing compressors on the seabed the restoration rates are improved and the investment and operating prices are lowered. In addition, underwater compression leaves a smaller ecological footprint and is more reliable than a platform. The Åsgard system consists of modules for 2 identical units of compressors, pumps, scrubbers, and coolers. The motors wanted to drive the pumps come from ANDRITZ.
Small, however essential
In 2010, Ritz Pumpenfabrik GmbH in Schwäbisch-Gmünd, Germany, became 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 well pumps, bottom consumption pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the world of utility, the motors can be made from cast iron, bronze or totally different type of stainless-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 technology. In designs with interior permanent magnet motor technology, or IPM for short, these maintenance-free motors can obtain spectacular outputs, efficiencies and, as a result, value financial savings.
The effective and measurable motor cooling system keeps the inside temp- erature as little as attainable. 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 lower shaft end of the rotor. One of its two main tasks is cooling and lubricating the close by thrust bearing. By doing so, the impeller ensures there’s a constant flow of cooling liquid in the proper path.
This liquid strikes via the within of the motor from the bottom to the top. The specially developed cooling channels define the precise path over all heat sources to discharge the heat successfully and systematically. At the top finish, the warmth from the liquid is then discharged through the motor’s outer wall. Here, it is transferred by way of the floor of the motor to the medium to be pumped.
The ANDRITZ submersible motors are only a tiny part of the underwater compressor system, but they’re also an extremely important part. The whole underwater station cannot function with out these motors to drive the pumps. Since first being installed 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 forms the condensate unit together with the pump and conveys those liquids which are eliminated by the separator upstream of the gasoline compressors.
In 2017, as a outcome of a failure in a part of the system which was not equipped by ANDRITZ, the motor was despatched in for repairs, throughout which an extensive study was carried out. Thermal distribution in the cooling circulate and the recent spots were analyzed in more detail. The outcomes also 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 new winding and a new rotor. This study and the implementation of its findings not solely profit the present customer and future clients in this case, but also strengthen confidence within the ANDRITZ submersible motor expertise.

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