In one of many world’s largest oil and gasoline fields, the firstever underwater compressor system employs ANDRITZ submersible motors. With their renewable winding these maintenance-free designed pumps have achieved impressive results.
We are surrounded by gasoline. From water bottles to the insulation in our homes, natural fuel is a key ingredient in virtually every product we use daily. According to the newest 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 development are manifold, but the IGU determines three major components. First, the price competitiveness of fuel in distinction to different power sources. Secondly, greater safety of supply with regard to infrastructure, delivery, and flexible use. Thirdly, fuel represents a sustainable type of energy that may mitigate climate change and lower localized air pollution. It has 50% fewer CO2 emissions in comparability with coal, for instance.
In order to fulfill this rising demand and use, the eco-friendly potential gas will have to be extracted utilizing a sustainable course of. One of the most important techniques is the Åsgard oil and gas subject on the Haltenbanken, 200 km off the coast of Norway. It contains 52 wells combined in 16 gas fields and related by 300 km of oil pipelines. As of December 2018, the sector has estimated assets of 9.9 million normal cubic meters of oil equal of oil and 51.1 million normal cubic meters of oil equal of fuel.
The system used comprises three essential areas: Åsgard A, B, and C. Åsgard A is a floating oil manufacturing 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 gas and condensate. This platform is supplemented by the condensate storage facility Åsgard C and the 707 km-long Åsgard fuel pipeline to the Karsto processing complicated to the north of Stavanger, Norway.
First in the world Aker Solutions ASA has been supporting the Åsgard gas area with numerous gasoline subject merchandise, systems, and companies since 2010. In time, the strain in 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 improve the output to 306 million barrels. These are usually installed on platforms above sea degree.
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 extra dependable than a platform. The Åsgard system consists of modules for 2 equivalent units of compressors, pumps, scrubbers, and coolers. The motors needed to drive the pumps come from ANDRITZ.
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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 consumption pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the area of application, the motors can be made from cast iron, bronze or totally different type 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 technology. In designs with inside permanent magnet motor know-how, or IPM for brief, these maintenance-free motors can obtain impressive outputs, efficiencies and, consequently, value savings.
The efficient and measurable motor cooling system retains the interior 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 delivery is mounted at the lower shaft finish of the rotor. One of its two main duties is cooling and lubricating the nearby thrust bearing. By doing so, the impeller ensures there is a fixed flow of cooling liquid in the right path.
This liquid strikes via the inside 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 warmth successfully and systematically. At the highest finish, the warmth from the liquid is then discharged by way of the motor’s outer wall. Here, it is transferred by way of 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, however they are additionally an especially essential half. The complete underwater station can not operate without these motors to drive the pumps. Since first being installed 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 together with the pump and conveys these liquids which are removed by the separator upstream of the gasoline compressors.
In 2017, due to a failure in a part of the system which was not supplied by ANDRITZ, the motor was sent in for repairs, during which an extensive research was carried out. Thermal distribution in the cooling move and the recent spots were 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 fully overhauled and fitted with a brand new winding and a brand new rotor. This examine and the implementation of its findings not solely profit the current buyer and future prospects on this case, but additionally strengthen confidence within the ANDRITZ submersible motor technology.
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