In one of the 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 outcomes.
We are surrounded by fuel. From ไดอะแฟรม to the insulation in our houses, natural gasoline is a key ingredient in nearly each product we use day by day. According to the latest 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 pattern are manifold, but the IGU determines three primary elements. First, the cost competitiveness of fuel in distinction to different energy sources. Secondly, larger safety of provide with regard to infrastructure, supply, and flexible use. Thirdly, gas represents a sustainable form of energy that may mitigate climate change and decrease localized pollution. It has 50% fewer CO2 emissions compared to coal, for example.
In order to satisfy this rising demand and use, the eco-friendly potential gasoline will have to be extracted utilizing a sustainable course of. One of the most important systems is the Åsgard oil and gasoline subject on the Haltenbanken, 200 km off the coast of Norway. It incorporates fifty two wells mixed in 16 gas fields and linked by 300 km of oil pipelines. As of December 2018, the sphere has estimated assets of 9.9 million normal cubic meters of oil equivalent of oil and fifty one.1 million commonplace cubic meters of oil equal of gas.
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 gasoline 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 earth Aker Solutions ASA has been supporting the Åsgard gasoline subject with varied gasoline subject merchandise, techniques, and providers since 2010. In time, the stress 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 so as to improve the output to 306 million barrels. These are usually put in on platforms above sea stage.
However, Åsgard is based on an underwater system. By utilizing compressors on the seabed the restoration charges 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 similar sets of compressors, pumps, scrubbers, and coolers. The motors wanted to drive the pumps come from ANDRITZ.
Small, but 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 manufacturing of submersible motors. Due to the renewable winding, ANDRITZ submersible motors are appropriate for driving deep nicely pumps, bottom consumption pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the realm of software, the motors could be made from forged iron, bronze or different type of chrome 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 technology. In designs with interior everlasting magnet motor technology, or IPM for short, these maintenance-free motors can achieve impressive outputs, efficiencies and, in consequence, price 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 as much as 75° C. An impeller with optimized suction and delivery is mounted on the decrease shaft finish of the rotor. One of its two main tasks is cooling and lubricating the close by thrust bearing. By doing so, the impeller ensures there’s a constant circulate of cooling liquid in the proper course.
This liquid strikes through 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 effectively and systematically. At the top finish, the heat from the liquid is then discharged via the motor’s outer wall. Here, it’s transferred by way of the floor of the motor to the medium to be pumped.
The ANDRITZ submersible motors are just a tiny a part of the underwater compressor system, but they’re also an extremely essential part. The entire underwater station can’t function with out 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 varieties the condensate unit along with the pump and conveys these liquids which are eliminated by the separator upstream of the gasoline compressors.
In 2017, as a outcome of a failure in part of the system which was not supplied by ANDRITZ, the motor was despatched in for repairs, during which an extensive examine was carried out. Thermal distribution in the cooling move and the hot spots have been analyzed in additional detail. The outcomes also 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 new winding and a new rotor. This study and the implementation of its findings not solely profit the present customer and future prospects in this case, but additionally strengthen confidence in the ANDRITZ submersible motor expertise.
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