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 spectacular outcomes.
We are surrounded by gasoline. From water bottles to the insulation in our properties, natural gas is a key ingredient in just about every product we use day by day. According to the newest report 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 pattern are manifold, but the IGU determines three main components. First, the cost competitiveness of gasoline in contrast to other power sources. Secondly, larger safety of supply with regard to infrastructure, supply, and versatile use. Thirdly, fuel represents a sustainable form of vitality that may mitigate local weather change and decrease localized pollution. It has 50% fewer CO2 emissions compared to coal, for example.
In order to meet this growing demand and use, the eco-friendly potential gasoline must be extracted utilizing a sustainable process. One of the largest methods is the Åsgard oil and fuel field on the Haltenbanken, 200 km off the coast of Norway. It incorporates 52 wells combined in sixteen gas fields and related by 300 km of oil pipelines. As of December 2018, the sphere has estimated resources of 9.9 million commonplace cubic meters of oil equal of oil and fifty one.1 million commonplace cubic meters of oil equal of fuel.
The system used includes three essential areas: Åsgard A, B, and C. Åsgard A is a floating oil manufacturing vessel that has been anchored there completely since extraction started in 1999. Åsgard B is a floating, semi-submersible fuel 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 complicated to the north of Stavanger, Norway.
First on the planet Aker Solutions ASA has been supporting the Åsgard gasoline subject with various gasoline area products, techniques, and companies since 2010. In time, the stress within 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 enhance the output to 306 million barrels. These are usually installed on platforms above sea stage.
However, Åsgard is predicated on an underwater system. By utilizing compressors on the seabed the restoration charges are improved and the funding 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 2 similar units 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, became 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 appropriate for driving deep well pumps, backside consumption pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the area of application, the motors can be manufactured from forged iron, bronze or completely different sort 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. เกจอาร์กอน are fitted with MCT, a particular cooling technology. In designs with interior everlasting magnet motor know-how, or IPM for short, these maintenance-free motors can achieve spectacular outputs, efficiencies and, consequently, cost financial savings.
The effective and measurable motor cooling system keeps the inside temp- erature as little as possible. Drinking water is used as a cooling liquid, which is why the motors can operate in media of up to 75° C. An impeller with optimized suction and delivery is mounted on the lower shaft finish of the rotor. One of its two major tasks is cooling and lubricating the close by thrust bearing. By doing so, the impeller ensures there’s a fixed circulate of cooling liquid in the proper path.
This liquid moves through the within of the motor from the underside to the highest. The specially developed cooling channels define the precise path over all heat sources to discharge the warmth successfully and systematically. At the highest end, the heat from the liquid is then discharged through the motor’s outer wall. Here, it’s transferred through the surface 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 additionally an especially important 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 varieties the condensate unit together with the pump and conveys these liquids which might be eliminated by the separator upstream of the gas compressors.
In 2017, due to a failure in a half of the system which was not supplied by ANDRITZ, the motor was despatched in for repairs, during which an intensive examine was carried out. Thermal distribution within the cooling move and the new spots had been analyzed in more element. The outcomes also led to the design of a new plate crosssection for the rotor plates.
Because of this, the motor to be repaired was also fully overhauled and fitted with a model new winding and a new rotor. This research and the implementation of its findings not solely benefit the present buyer and future customers on this case, but also strengthen confidence in the ANDRITZ submersible motor technology.
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