Andritz’s submersible motor technology 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 results.
We are surrounded by gas. From water bottles to the insulation in our houses, natural gasoline is a key ingredient in just about every 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 pattern are manifold, however the IGU determines three primary elements. First, the price competitiveness of fuel in contrast to other energy sources. Secondly, larger security of provide with regard to infrastructure, delivery, and versatile use. Thirdly, gasoline represents a sustainable type of vitality that can mitigate climate change and lower localized pollution. It has 50% fewer CO2 emissions in comparison with coal, for instance.
In order to fulfill this growing demand and use, the eco-friendly potential gasoline must be extracted utilizing a sustainable course of. One of the largest systems is the Åsgard oil and gas area on the Haltenbanken, 200 km off the coast of Norway. It contains fifty two wells combined in 16 gasoline 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 equivalent of oil and 51.1 million normal cubic meters of oil equivalent of fuel.
The system used includes three important areas: Åsgard A, B, and C. Åsgard A is a floating oil production vessel that has been anchored there permanently since extraction started in 1999. Åsgard B is a floating, semi-submersible gas and condensate processing platform for processing and stabilizing of gasoline 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 numerous fuel subject products, techniques, and providers since 2010. In time, the pressure in 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 to have the ability to improve the output to 306 million barrels. These are normally 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 investment and operating costs are decreased. In addition, underwater compression leaves a smaller ecological footprint and is extra dependable than a platform. The Åsgard system consists of modules for two similar units of compressors, pumps, scrubbers, and coolers. The motors needed to drive the pumps come from ANDRITZ.
Small, but essential

In 2010, Ritz Pumpenfabrik GmbH in Schwäbisch-Gmünd, Germany, turned ANDRITZ Ritz GmbH and a half of the ANDRITZ Group, as did the production of submersible motors. Due to the renewable winding, ANDRITZ submersible motors are suitable for driving deep well pumps, backside consumption pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the realm of utility, the motors can be manufactured from cast iron, bronze or totally different kind 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 particular cooling expertise. In designs with interior permanent magnet motor expertise, or IPM for brief, these maintenance-free motors can obtain spectacular outputs, efficiencies and, consequently, value savings.
The efficient and measurable motor cooling system keeps the inside temp- erature as low as potential. 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 delivery is mounted at the decrease shaft finish of the rotor. One of its two major duties is cooling and lubricating the close by thrust bearing. By doing so, เครื่องมือที่ใช้วัดความดันโลหิต ensures there is a fixed flow of cooling liquid in the best direction.
This liquid moves by way of the inside of the motor from the underside to the top. The specifically developed cooling channels define the exact path over all heat sources to discharge the heat effectively and systematically. At the top finish, the warmth from the liquid is then discharged via 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, 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 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 forms the condensate unit along with the pump and conveys these liquids which are removed by the separator upstream of the fuel compressors.
In 2017, due to a failure in part of the system which was not equipped by ANDRITZ, the motor was sent in for repairs, during which an intensive examine was performed. Thermal distribution within the cooling circulate and the new spots have been analyzed in more detail. 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 also utterly overhauled and fitted with a new winding and a model new rotor. This research and the implementation of its findings not solely profit the present customer and future customers in this case, but also strengthen confidence within the ANDRITZ submersible motor know-how.
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