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 gas. From water bottles to the insulation in our properties, pure gas is a key ingredient in nearly each product we use every day. According to the latest 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 development are manifold, however the IGU determines three major factors. First, the price competitiveness of gasoline in distinction to different energy sources. Secondly, greater security of provide with regard to infrastructure, delivery, and flexible use. Thirdly, gasoline represents a sustainable type of vitality that can mitigate climate change and decrease localized air pollution. It has 50% fewer CO2 emissions compared to coal, for instance.
In order to meet this growing demand and use, the eco-friendly potential gas must 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 accommodates fifty two wells combined in sixteen fuel fields and linked by 300 km of oil pipelines. As of เกวัดแรงดัน , the sphere has estimated sources of 9.9 million commonplace cubic meters of oil equal of oil and fifty one.1 million standard cubic meters of oil equal of fuel.
The system used comprises three important areas: Åsgard A, B, and C. Åsgard A is a floating oil production vessel that has been anchored there permanently since extraction began in 1999. Åsgard B is a floating, semi-submersible gasoline 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 complex to the north of Stavanger, Norway.
First on the planet Aker Solutions ASA has been supporting the Åsgard fuel area with various fuel subject products, systems, and companies since 2010. In time, the strain 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 so as to increase the output to 306 million barrels. These are usually installed on platforms above sea level.
However, Åsgard is based on an underwater system. By using compressors on the seabed the recovery charges are improved and the funding and working costs are lowered. In addition, underwater compression leaves a smaller ecological footprint and is extra dependable than a platform. The Åsgard system consists of modules for 2 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, became ANDRITZ Ritz GmbH and a half of the ANDRITZ Group, as did the manufacturing of submersible motors. Due to the renewable winding, ANDRITZ submersible motors are appropriate for driving deep properly pumps, backside intake 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 sort of stainless-steel and put in 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 special cooling expertise. In designs with interior permanent magnet motor technology, or IPM for brief, these maintenance-free motors can obtain impressive outputs, efficiencies and, in consequence, cost savings.
The effective and measurable motor cooling system retains the inside temp- erature as little as attainable. Drinking water is used as a cooling liquid, which is why the motors can function in media of up to 75° C. An impeller with optimized suction and supply is mounted on the decrease shaft finish of the rotor. One of its two major duties is cooling and lubricating the nearby thrust bearing. By doing so, the impeller ensures there’s a fixed flow of cooling liquid in the best path.
This liquid moves by way of the within of the motor from the underside to the top. The specifically developed cooling channels outline the precise path over all warmth sources to discharge the heat successfully and systematically. At the highest end, the heat from the liquid is then discharged by way of 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 only a tiny a part of the underwater compressor system, however they are also an especially necessary part. The whole underwater station can not function with out these motors to drive the pumps. Since first being put in in 2016, these submersible motors have been operating 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 along with the pump and conveys those liquids which are eliminated by the separator upstream of the gasoline compressors.
In 2017, because of a failure in part of the system which was not supplied by ANDRITZ, the motor was despatched in for repairs, during which an intensive examine was performed. Thermal distribution in the cooling move and the hot spots have been analyzed in more element. 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 model new winding and a model new rotor. This examine and the implementation of its findings not only benefit the current customer and future clients in this case, but additionally strengthen confidence in the ANDRITZ submersible motor know-how.
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