Andritz’s submersible motor technology success

In one of many world’s largest oil and fuel 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 gasoline. From water bottles to the insulation in our homes, pure gasoline is a key ingredient in nearly each product we use day by day. According to เกจวัดแรง issued by the International Gas Union (IGU) in 2019, the global demand in gasoline has been rising by 35% of the past decade alone.
The causes for this development are manifold, however the IGU determines three primary components. First, the fee competitiveness of gas in contrast to other vitality sources. Secondly, greater security of supply with regard to infrastructure, delivery, and flexible use. Thirdly, gas represents a sustainable form of vitality that may mitigate climate change and decrease localized air 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 should be extracted utilizing a sustainable course of. One of the most important techniques is the Åsgard oil and gas area on the Haltenbanken, 200 km off the coast of Norway. It accommodates 52 wells combined in sixteen fuel fields and related by 300 km of oil pipelines. As of December 2018, the sphere has estimated resources of 9.9 million normal cubic meters of oil equal of oil and fifty one.1 million standard cubic meters of oil equal of fuel.
The system used contains three important areas: Åsgard A, B, and C. Åsgard A is a floating oil manufacturing vessel that has been anchored there permanently since extraction started in 1999. Åsgard B is a floating, semi-submersible gasoline 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 complex to the north of Stavanger, Norway.
First on the planet Aker Solutions ASA has been supporting the Åsgard gasoline field with various fuel field products, systems, and companies since 2010. In time, the pressure in 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 increase the output to 306 million barrels. These are usually installed on platforms above sea stage.
However, Åsgard is based on an underwater system. By using compressors on the seabed the restoration charges are improved and the investment and operating prices are lowered. 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 units of compressors, pumps, scrubbers, and coolers. The motors wanted to drive the pumps come from ANDRITZ.
Small, but essential
In 2010, Ritz Pumpenfabrik GmbH in Schwäbisch-Gmünd, Germany, turned 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 consumption pumps, suction pumps, seawater pumps, and underwater machinery.
Depending on the area of application, the motors may be made of cast iron, bronze or totally different sort of chrome 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 special cooling expertise. In designs with interior everlasting magnet motor expertise, or IPM for short, these maintenance-free motors can achieve impressive outputs, efficiencies and, as a result, cost financial savings.
The effective and measurable motor cooling system keeps the interior temp- erature as little as attainable. Drinking water is used as a cooling liquid, which is why the motors can function in media of as a lot as 75° C. An impeller with optimized suction and delivery is mounted at the decrease 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 constant circulate of cooling liquid in the proper path.
This liquid strikes by way of the inside of the motor from the bottom to the highest. The specifically developed cooling channels outline the precise path over all warmth sources to discharge the warmth effectively and systematically. At the top end, the heat from the liquid is then discharged by way of the motor’s outer wall. Here, it’s transferred by way of the surface 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’re also an especially essential part. The complete underwater station can not 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 along with the pump and conveys those liquids that are removed by the separator upstream of the gas compressors.
In 2017, as a end result of a failure in part of the system which was not equipped by ANDRITZ, the motor was despatched in for repairs, during which an extensive research was performed. Thermal distribution in the cooling flow and the recent spots have been analyzed in more element. The results additionally led to the design of a brand 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 examine and the implementation of its findings not solely profit the present buyer and future prospects in this case, but in addition strengthen confidence in the ANDRITZ submersible motor expertise.

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