Andritz’s submersible motor know-how 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 outcomes.
We are surrounded by gas. From water bottles to the insulation in our properties, pure gasoline is a key ingredient in nearly each product we use every day. According to the newest 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 development are manifold, but the IGU determines three main components. First, the price competitiveness of fuel in distinction to different energy sources. Secondly, greater security of provide with regard to infrastructure, supply, and versatile use. Thirdly, gas represents a sustainable form of energy that may mitigate local weather change and lower localized air pollution. It has 50% fewer CO2 emissions in comparability with coal, for example.
In order to fulfill this rising demand and use, the eco-friendly potential fuel should be extracted using a sustainable course of. One of the biggest methods is the Åsgard oil and fuel field on the Haltenbanken, 200 km off the coast of Norway. It incorporates fifty two wells mixed in 16 gasoline fields and linked by 300 km of oil pipelines. As of December 2018, the sphere has estimated resources of 9.9 million normal cubic meters of oil equivalent of oil and fifty one.1 million commonplace cubic meters of oil equal of fuel.
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 completely since extraction started in 1999. Åsgard B is a floating, semi-submersible gas 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 in the world Aker Solutions ASA has been supporting the Åsgard gasoline subject with numerous gas area merchandise, methods, and providers since 2010. In time, the pressure within the storage facility in gas-producing fields drops. Compressors are needed to maintain the output. Aker delivered the first-ever underwater compressor system worldwide to Åsgard to have the ability to enhance the output to 306 million barrels. These are usually put in on platforms above sea level.
However, Åsgard relies on an underwater system. By utilizing compressors on the seabed the restoration charges are improved and the investment 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 two identical 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, 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 appropriate for driving deep well pumps, bottom consumption pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the area of application, the motors could be manufactured from forged iron, bronze or completely 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 short, these maintenance-free motors can achieve impressive outputs, efficiencies and, as a result, price financial savings.
The effective and measurable motor cooling system retains the inside temp- erature as little as potential. Drinking water is used as a cooling liquid, which is why the motors can operate in media of as a lot as 75° C. An impeller with optimized suction and supply is mounted at the lower shaft end of the rotor. One of its two primary tasks is cooling and lubricating the close by thrust bearing. By doing so, the impeller ensures there is a fixed flow of cooling liquid in the right direction.
เกจวัดแรงดันถังลม via the within of the motor from the bottom to the highest. The specially developed cooling channels outline the exact path over all heat sources to discharge the heat effectively and systematically. At the highest end, the heat from the liquid is then discharged by way of 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 part of the underwater compressor system, but they’re also an especially necessary half. The whole underwater station cannot function with out these motors to drive the pumps. Since first being put in 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 types the condensate unit along with the pump and conveys these liquids which would possibly be removed by the separator upstream of the gas compressors.
In 2017, because 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 research was carried out. Thermal distribution within the cooling flow and the new spots have been analyzed in additional detail. The results additionally led to the design of a new plate crosssection for the rotor plates.
Because of this, the motor to be repaired was additionally completely overhauled and fitted with a new winding and a brand new rotor. This study and the implementation of its findings not only profit the current buyer and future clients in this case, but in addition strengthen confidence in the ANDRITZ submersible motor technology.

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