Andritz’s submersible motor know-how 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 spectacular results.
We are surrounded by fuel. From water bottles to the insulation in our homes, natural fuel is a key ingredient in nearly every product we use every day. 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 previous decade alone.
The causes for this pattern are manifold, however the IGU determines three major components. First, the price competitiveness of gas in contrast to different energy sources. Secondly, higher security of provide with regard to infrastructure, delivery, and versatile use. Thirdly, gasoline represents a sustainable form of power that can mitigate local weather change and decrease localized air pollution. It has 50% fewer CO2 emissions compared to coal, for example.
In order to fulfill this growing demand and use, the eco-friendly potential fuel should be extracted using a sustainable process. One of the largest methods is the Åsgard oil and gas field on the Haltenbanken, 200 km off the coast of Norway. It incorporates 52 wells mixed in sixteen fuel fields and connected by 300 km of oil pipelines. As of December 2018, the sphere has estimated resources of 9.9 million standard cubic meters of oil equivalent of oil and fifty one.1 million standard cubic meters of oil equal of fuel.
The system used contains 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 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 on the earth Aker Solutions ASA has been supporting the Åsgard fuel subject with varied gas field merchandise, methods, and companies since 2010. In time, the strain within 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 based on an underwater system. By utilizing compressors on the seabed the recovery rates are improved and the investment and working prices 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 units of compressors, pumps, scrubbers, and coolers. The motors needed to drive the pumps come from ANDRITZ.
Small, however important
In 2010, Ritz Pumpenfabrik GmbH in Schwäbisch-Gmünd, Germany, turned 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 well pumps, backside consumption pumps, suction pumps, seawater pumps, and underwater machinery.
Depending on the world of utility, the motors can be manufactured from forged iron, bronze or 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 special cooling expertise. In designs with inside permanent magnet motor technology, or IPM for short, these maintenance-free motors can obtain impressive outputs, efficiencies and, as a result, value financial savings.
The effective and measurable motor cooling system retains 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 up to 75° C. An impeller with optimized suction and delivery is mounted at the decrease shaft finish of the rotor. One of its two primary duties is cooling and lubricating the close by thrust bearing. By doing so, the impeller ensures there is a fixed flow of cooling liquid in the proper course.
This liquid moves by way of the within of the motor from the underside to the highest. The specifically developed cooling channels outline the exact path over all heat sources to discharge the heat effectively and systematically. At the highest end, the heat from the liquid is then discharged via the motor’s outer wall. Here, เกจวัดแรงดันถังแก๊ส is transferred by way of the surface of the motor to the medium to be pumped.
The ANDRITZ submersible motors are just a tiny part of the underwater compressor system, however they’re additionally a particularly important part. The whole underwater station cannot function with out these motors to drive the pumps. Since first being put in 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 types the condensate unit together with the pump and conveys those liquids that are removed by the separator upstream of the fuel compressors.
In 2017, due to a failure in a part of the system which was not equipped by ANDRITZ, the motor was despatched in for repairs, throughout which an extensive study was carried out. Thermal distribution in the cooling flow 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 also completely overhauled and fitted with a new winding and a new rotor. This examine and the implementation of its findings not solely profit the current buyer and future customers in this case, but in addition strengthen confidence in the ANDRITZ submersible motor expertise.
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