Andritz’s submersible motor expertise 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 outcomes.
We are surrounded by gasoline. From water bottles to the insulation in our homes, natural fuel 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 worldwide demand in gasoline has been rising by 35% of the past decade alone.
The causes for this trend are manifold, but the IGU determines three primary elements. First, the fee competitiveness of gasoline in distinction to different energy sources. Secondly, higher safety of provide with regard to infrastructure, delivery, and versatile use. Thirdly, fuel represents a sustainable type 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 fulfill this growing demand and use, the eco-friendly potential gasoline will have to be extracted utilizing a sustainable process. One of the most important techniques is the Åsgard oil and gasoline subject on the Haltenbanken, 200 km off the coast of Norway. It incorporates 52 wells combined in sixteen gas fields and connected by 300 km of oil pipelines. As of December 2018, the sector has estimated resources of 9.9 million standard cubic meters of oil equivalent 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 production vessel that has been anchored there completely since extraction began 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 gasoline pipeline to the Karsto processing complex to the north of Stavanger, Norway.
First on the earth Aker Solutions ASA has been supporting the Åsgard gas subject with varied fuel subject merchandise, methods, and providers since 2010. In time, the pressure within the storage facility in gas-producing fields drops. Compressors are wanted 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 normally put in on platforms above sea degree.
However, Åsgard is based on an underwater system. By utilizing compressors on the seabed the recovery charges are improved and the investment and working costs are lowered. In addition, underwater compression leaves a smaller ecological footprint and is more dependable than a platform. The Åsgard system consists of modules for two similar sets of compressors, pumps, scrubbers, and coolers. The motors wanted to drive the pumps come from ANDRITZ.
Small, however essential
In 2010, Ritz Pumpenfabrik GmbH in Schwäbisch-Gmünd, Germany, grew to become 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 suitable for driving deep properly pumps, bottom intake pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the area of utility, the motors could 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 expertise. In designs with inside everlasting magnet motor know-how, or IPM for brief, these maintenance-free motors can obtain spectacular outputs, efficiencies and, in consequence, value savings.
The efficient 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 supply is mounted at the lower shaft finish of the rotor. One of its two major tasks 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 path.
This liquid moves via the inside 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 successfully and systematically. At the top finish, the warmth from the liquid is then discharged via the motor’s outer wall. Here, it’s transferred via the floor of the motor to the medium to be pumped.
Billion are only a tiny a half of the underwater compressor system, however they’re also an especially essential part. The entire underwater station cannot operate 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 varieties the condensate unit along with the pump and conveys these liquids which are eliminated by the separator upstream of the fuel compressors.
In 2017, because of a failure in a half of the system which was not supplied by ANDRITZ, the motor was sent in for repairs, throughout which an extensive study was conducted. Thermal distribution within the cooling move and the recent spots were analyzed in additional detail. The outcomes 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 completely overhauled and fitted with a brand new winding and a new rotor. This study and the implementation of its findings not solely profit the present buyer and future clients in this case, but in addition strengthen confidence in the ANDRITZ submersible motor technology.
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