Andritz’s submersible motor technology success

In one of the 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 outcomes.
We are surrounded by gasoline. From water bottles to the insulation in our homes, pure gas is a key ingredient in nearly every product we use every day. According to the most recent report issued by the International Gas Union (IGU) in 2019, the global demand in fuel has been rising by 35% of the past decade alone.
The reasons for this development are manifold, but the IGU determines three primary components. First, the price competitiveness of gasoline in contrast to different vitality sources. Secondly, larger security of provide with regard to infrastructure, supply, and versatile use. Thirdly, gas represents a sustainable form of energy that may mitigate climate change and decrease localized pollution. It has 50% fewer CO2 emissions in comparison with coal, for example.
In order to fulfill this growing demand and use, the eco-friendly potential gas should be extracted utilizing a sustainable course of. One of the most important systems is the Åsgard oil and gasoline area on the Haltenbanken, 200 km off the coast of Norway. It accommodates fifty two wells combined in sixteen fuel fields and related by 300 km of oil pipelines. As of December 2018, the sphere has estimated sources of 9.9 million standard cubic meters of oil equal of oil and 51.1 million commonplace 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 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 gas 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 fuel field with various gasoline area products, methods, and providers since 2010. In time, the stress 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 in order to improve the output to 306 million barrels. These are normally put in on platforms above sea level.
However, Åsgard is based on an underwater system. By utilizing pressure gauge หน้าปัด 2 นิ้ว on the seabed the restoration rates are improved and the investment and operating costs are reduced. In addition, underwater compression leaves a smaller ecological footprint and is extra reliable than a platform. The Åsgard system consists of modules for 2 identical sets of compressors, pumps, scrubbers, and coolers. The motors needed to drive the pumps come from ANDRITZ.
Small, but essential
In 2010, Ritz Pumpenfabrik GmbH in Schwäbisch-Gmünd, Germany, became ANDRITZ Ritz GmbH and a half of the ANDRITZ Group, as did the production 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 equipment.
Depending on the world of application, the motors could be manufactured from cast iron, bronze or totally different kind 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 special cooling know-how. In designs with interior everlasting magnet motor technology, or IPM for short, these maintenance-free motors can achieve impressive outputs, efficiencies and, as a result, price financial savings.
The efficient 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 function in media of as a lot as 75° C. An impeller with optimized suction and supply is mounted on the decrease shaft end 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 right course.
This liquid strikes via the within of the motor from the bottom to the highest. The specifically developed cooling channels define the exact path over all warmth sources to discharge the warmth effectively and systematically. At the highest finish, the heat 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 just a tiny a part of the underwater compressor system, but they are also a particularly necessary half. The complete underwater station cannot operate with out 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 types the condensate unit along with the pump and conveys those liquids that are removed by the separator upstream of the fuel compressors.
In 2017, as a end result of a failure in a part of the system which was not equipped by ANDRITZ, the motor was sent in for repairs, throughout which an intensive examine was performed. Thermal distribution within the cooling circulate and the recent spots have been analyzed in more element. The outcomes also led to the design of a brand new plate crosssection for the rotor plates.
Because of this, the motor to be repaired was additionally utterly overhauled and fitted with a brand new winding and a new rotor. This research and the implementation of its findings not only benefit the current buyer and future clients on this case, but also strengthen confidence within the ANDRITZ submersible motor technology.

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