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, pure gas is a key ingredient in virtually each product we use day by day. According to the most recent report issued by the International Gas Union (IGU) in 2019, the worldwide demand in gas has been rising by 35% of the previous decade alone.
The causes for this pattern are manifold, but the IGU determines three primary factors. First, the price competitiveness of fuel in contrast to other vitality sources. Secondly, higher safety of provide with regard to infrastructure, supply, and versatile use. Thirdly, gasoline represents a sustainable type of power that can mitigate local weather change and lower localized air pollution. It has 50% fewer CO2 emissions in comparison with coal, for instance.
In order to meet this rising demand and use, the eco-friendly potential gas will have to be extracted utilizing a sustainable process. One of the largest systems is the Åsgard oil and gasoline subject on the Haltenbanken, 200 km off the coast of Norway. It accommodates fifty two wells mixed in 16 fuel fields and linked by 300 km of oil pipelines. As of December 2018, the sphere has estimated assets of 9.9 million standard cubic meters of oil equal of oil and 51.1 million normal cubic meters of oil equivalent of gas.
ไดอะแฟรม ซีล used comprises 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 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 advanced to the north of Stavanger, Norway.
First in the world Aker Solutions ASA has been supporting the Åsgard gasoline area with varied gasoline area merchandise, systems, and companies since 2010. In time, the pressure 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 increase the output to 306 million barrels. These are usually installed on platforms above sea stage.
However, Åsgard relies on an underwater system. By utilizing compressors on the seabed the restoration rates are improved and the funding and working costs are reduced. 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 sets of compressors, pumps, scrubbers, and coolers. The motors wanted to drive the pumps come from ANDRITZ.
Small, however important
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 nicely pumps, bottom intake pumps, suction pumps, seawater pumps, and underwater machinery.
Depending on the realm of software, the motors may be made of forged iron, bronze or different sort of stainless-steel and installed 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 permanent magnet motor know-how, or IPM for short, these maintenance-free motors can obtain impressive outputs, efficiencies and, in consequence, price 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 much as 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 is a constant move of cooling liquid in the right direction.
This liquid moves by way of the inside of the motor from the underside to the top. The specifically developed cooling channels outline the precise path over all heat sources to discharge the heat successfully and systematically. At the highest finish, the heat from the liquid is then discharged through the motor’s outer wall. Here, it’s 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 are additionally an especially necessary half. The entire underwater station can’t function without these motors to drive the pumps. Since first being put in in 2016, these submersible motors have been operating with none 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 gas compressors.
In 2017, because of a failure in a half of the system which was not provided by ANDRITZ, the motor was sent in for repairs, during which an intensive research was carried out. Thermal distribution in the cooling flow and the recent spots were analyzed in additional detail. The outcomes additionally led to the design of a brand 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 model new rotor. This examine and the implementation of its findings not solely benefit the present customer and future prospects in this case, but additionally strengthen confidence within the ANDRITZ submersible motor technology.
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