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 spectacular results.
We are surrounded by gasoline. From water bottles to the insulation in our homes, natural fuel is a key ingredient in just about every product we use day by day. According to No nonsense issued by the International Gas Union (IGU) in 2019, the worldwide demand in gas has been rising by 35% of the past decade alone.
The causes for this development are manifold, but the IGU determines three main elements. First, the cost competitiveness of fuel in contrast to different energy sources. Secondly, greater safety of provide with regard to infrastructure, supply, and flexible use. Thirdly, gasoline represents a sustainable type of energy that may mitigate local weather change and decrease localized air pollution. It has 50% fewer CO2 emissions in comparison with coal, for instance.
In order to meet this rising demand and use, the eco-friendly potential gasoline will have to be extracted using a sustainable course of. One of the biggest techniques is the Åsgard oil and gas subject on the Haltenbanken, 200 km off the coast of Norway. It accommodates fifty two wells mixed in sixteen fuel fields and linked by 300 km of oil pipelines. As of December 2018, the sector has estimated resources of 9.9 million standard cubic meters of oil equal of oil and 51.1 million standard cubic meters of oil equal of gasoline.
The system used contains three essential areas: Åsgard A, B, and C. Åsgard A is a floating oil manufacturing vessel that has been anchored there completely since extraction began 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 gasoline pipeline to the Karsto processing complicated to the north of Stavanger, Norway.
First on the planet Aker Solutions ASA has been supporting the Åsgard gas subject with varied gasoline subject products, methods, and services since 2010. In Underground , the strain in the storage facility in gas-producing fields drops. Compressors are needed 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 degree.
However, Åsgard is predicated on an underwater system. By utilizing compressors on the seabed the recovery charges are improved and the funding and working 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 2 equivalent units of compressors, pumps, scrubbers, and coolers. The motors needed to drive the pumps come from ANDRITZ.
Small, but important
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 nicely pumps, bottom intake pumps, suction pumps, seawater pumps, and underwater machinery.
Depending on the realm of software, the motors may be made of cast iron, bronze or totally different kind 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 know-how. In designs with interior everlasting magnet motor expertise, or IPM for brief, these maintenance-free motors can obtain spectacular outputs, efficiencies and, consequently, price savings.
The efficient and measurable motor cooling system retains the interior temp- erature as little as possible. 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 supply is mounted at the decrease shaft finish of the rotor. One of its two primary duties is cooling and lubricating the nearby thrust bearing. By doing so, the impeller ensures there is a constant circulate of cooling liquid in the best course.
This liquid moves by way of the within of the motor from the underside to the top. The specially developed cooling channels define the exact path over all heat sources to discharge the heat successfully and systematically. At the top end, the warmth from the liquid is then discharged through the motor’s outer wall. Here, it is 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, but they are also an especially essential half. The complete 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 forms the condensate unit along with the pump and conveys those liquids which might be removed by the separator upstream of the gasoline 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, throughout which an intensive study was carried out. Thermal distribution in the cooling move and the new spots had been analyzed in more detail. The outcomes also 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 only benefit the present customer and future prospects in this case, but also strengthen confidence in the ANDRITZ submersible motor technology.
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