Andritz’s submersible motor know-how success

In one of the 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 spectacular outcomes.
We are surrounded by gas. From water bottles to the insulation in our homes, pure gasoline is a key ingredient in just about 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 previous decade alone.
The causes for this trend are manifold, however the IGU determines three primary components. First, the fee competitiveness of fuel in distinction to different energy sources. Secondly, greater safety of supply with regard to infrastructure, supply, and flexible use. Thirdly, gas represents a sustainable form of power that may mitigate climate change and lower localized pollution. It has 50% fewer CO2 emissions compared to coal, for instance.
In order to meet this rising demand and use, the eco-friendly potential gas must be extracted utilizing a sustainable course of. One of the largest methods is the Åsgard oil and gasoline area on the Haltenbanken, 200 km off the coast of Norway. It accommodates fifty two wells mixed in 16 gas fields and connected by 300 km of oil pipelines. As of December 2018, the sphere has estimated assets of 9.9 million standard cubic meters of oil equivalent of oil and fifty one.1 million standard cubic meters of oil equal of gasoline.
The system used includes three important areas: Åsgard A, B, and C. Åsgard A is a floating oil production vessel that has been anchored there permanently since extraction began in 1999. Åsgard B is a floating, semi-submersible gasoline 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 complex to the north of Stavanger, Norway.
First in the world Aker Solutions ASA has been supporting the Åsgard fuel field with numerous fuel area merchandise, systems, and providers since 2010. In time, the strain within the storage facility in gas-producing fields drops. Compressors are wanted to maintain 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 usually installed on platforms above sea degree.
However, Åsgard is predicated on an underwater system. By utilizing compressors on the seabed the restoration charges are improved and the investment and operating prices are reduced. In addition, underwater compression leaves a smaller ecological footprint and is extra dependable than a platform. The Åsgard system consists of modules for two equivalent units of compressors, pumps, scrubbers, and coolers. The motors needed to drive the pumps come from ANDRITZ.
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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, backside intake pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the realm of application, the motors may be made from cast iron, bronze or totally different sort of stainless steel and put in 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 know-how. In designs with inside everlasting 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 retains the inside temp- erature as low 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 decrease shaft finish 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 constant move of cooling liquid in the right course.
This liquid moves by way of the within of the motor from the underside to the highest. The specially developed cooling channels outline the precise path over all warmth sources to discharge the heat effectively and systematically. At the top finish, the warmth from the liquid is then discharged via the motor’s outer wall. Here, it is transferred by way of the surface 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’re also a particularly necessary half. The whole underwater station can not operate without 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, due to a failure in part of the system which was not supplied by ANDRITZ, the motor was despatched in for repairs, during which an intensive examine was carried out. Thermal distribution within the cooling move and the new spots have been analyzed in additional detail. 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 also fully overhauled and fitted with a model new winding and a model new rotor. This research and the implementation of its findings not solely profit the current buyer and future customers on this case, but in addition strengthen confidence in the ANDRITZ submersible motor technology.

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