Andritz’s submersible motor technology success

In one of many world’s largest oil and gas 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 properties, pure gasoline is a key ingredient in just about each product we use daily. According to the newest report issued by the International Gas Union (IGU) in 2019, the global 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 main components. First, the fee competitiveness of fuel in contrast to other power sources. Secondly, higher security of provide with regard to infrastructure, delivery, and versatile use. Thirdly, gas represents a sustainable form of energy that may mitigate climate change and decrease localized air pollution. It has 50% fewer CO2 emissions in comparison with coal, for example.
In order to fulfill this growing demand and use, the eco-friendly potential gasoline will have to be extracted using a sustainable process. One of the largest systems is the Åsgard oil and gasoline field on the Haltenbanken, 200 km off the coast of Norway. It contains fifty two wells combined in 16 fuel fields and linked by 300 km of oil pipelines. As of December 2018, the sector has estimated resources of 9.9 million standard cubic meters of oil equal of oil and 51.1 million standard cubic meters of oil equivalent of gasoline.
The system used includes three essential 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 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 on the planet Aker Solutions ASA has been supporting the Åsgard fuel area with numerous gas area merchandise, methods, and providers since 2010. In time, the stress 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 in order to improve the output to 306 million barrels. These are usually put in on platforms above sea degree.
However, Åsgard is predicated on an underwater system. By utilizing compressors on the seabed the restoration rates are improved and the investment and working prices are decreased. In addition, underwater compression leaves a smaller ecological footprint and is more reliable than a platform. The Åsgard system consists of modules for 2 identical units of compressors, pumps, scrubbers, and coolers. The motors wanted to drive the pumps come from ANDRITZ.
Small, but essential
In 2010, Ritz Pumpenfabrik GmbH in Schwäbisch-Gmünd, Germany, grew to become 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 properly pumps, bottom intake pumps, suction pumps, seawater pumps, and underwater machinery.
Depending on the realm of application, the motors may be manufactured from cast iron, bronze or completely different kind 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 particular cooling expertise. In designs with inside permanent magnet motor technology, or IPM for brief, these maintenance-free motors can obtain spectacular outputs, efficiencies and, as a result, cost financial savings.
The efficient and measurable motor cooling system retains the interior temp- erature as low as possible. 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 delivery is mounted at the lower shaft end of the rotor. One of its two major duties is cooling and lubricating the close by thrust bearing. By doing so, the impeller ensures there’s a constant flow of cooling liquid in the proper course.
This liquid strikes by way of the within of the motor from the bottom to the top. The specially developed cooling channels outline the precise path over all heat sources to discharge the heat effectively and systematically. At the top end, the heat from the liquid is then discharged by way of the motor’s outer wall. Here, it’s transferred through the floor of the motor to the medium to be pumped.
The ANDRITZ submersible motors are just a tiny part of the underwater compressor system, but they are also an extremely important half. The whole underwater station cannot operate with out these motors to drive the pumps. Since first being installed 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 types the condensate unit along with the pump and conveys these liquids that are eliminated by the separator upstream of the fuel compressors.
In Luxurious , because of a failure in part of the system which was not supplied by ANDRITZ, the motor was sent in for repairs, during which an extensive research was conducted. Thermal distribution within the cooling circulate and the hot spots were analyzed in additional 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 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 on this case, but additionally strengthen confidence within the ANDRITZ submersible motor technology.
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