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 spectacular results.
We are surrounded by gas. From water bottles to the insulation in our properties, pure fuel is a key ingredient in nearly every product we use daily. 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 reasons for this pattern are manifold, but the IGU determines three primary factors. First, the cost competitiveness of gasoline in distinction to other vitality sources. Secondly, larger safety of supply with regard to infrastructure, supply, and versatile use. Thirdly, fuel represents a sustainable type of energy that may mitigate local weather change and decrease localized pollution. It has 50% fewer CO2 emissions compared to coal, for example.
In order to meet this growing demand and use, the eco-friendly potential gasoline will have to be extracted utilizing a sustainable course of. One of the biggest systems is the Åsgard oil and gas field on the Haltenbanken, 200 km off the coast of Norway. It accommodates fifty two wells mixed in 16 gas fields and linked by 300 km of oil pipelines. As of December 2018, the field has estimated sources of 9.9 million normal cubic meters of oil equivalent of oil and fifty one.1 million standard cubic meters of oil equivalent of fuel.
The system used comprises three essential areas: Åsgard A, B, and C. Åsgard A is a floating oil production vessel that has been anchored there completely since extraction started in 1999. Åsgard B is a floating, semi-submersible fuel 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 gasoline pipeline to the Karsto processing advanced to the north of Stavanger, Norway.
First in the world Aker Solutions ASA has been supporting the Åsgard gasoline subject with various fuel subject merchandise, methods, and services 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 increase the output to 306 million barrels. These are normally installed on platforms above sea degree.
However, Åsgard relies on an underwater system. By using compressors on the seabed the recovery charges are improved and the investment and operating costs are lowered. In addition, underwater compression leaves a smaller ecological footprint and is more reliable than a platform. The Åsgard system consists of modules for two similar units 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, turned 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 appropriate for driving deep nicely pumps, bottom intake pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the realm of utility, the motors could be manufactured from cast iron, bronze or 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 special cooling know-how. In designs with inside permanent magnet motor know-how, or IPM for short, these maintenance-free motors can obtain impressive outputs, efficiencies and, in consequence, value savings.
The efficient and measurable motor cooling system keeps the inside temp- erature as little as attainable. Drinking water is used as a cooling liquid, which is why the motors can operate in media of as a lot as 75° C. An impeller with optimized suction and supply is mounted on the decrease shaft finish of the rotor. One of its two major duties is cooling and lubricating the nearby thrust bearing. By doing so, the impeller ensures there’s a fixed move of cooling liquid in the right path.
This liquid moves via the within of the motor from the underside to the highest. The specially developed cooling channels outline the precise path over all warmth sources to discharge the heat successfully and systematically. At the top finish, the warmth from the liquid is then discharged through 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 only a tiny part of the underwater compressor system, but they’re additionally an especially important half. The whole underwater station can not function without 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 those liquids that are removed by the separator upstream of the gas compressors.
In 2017, because of a failure in part of the system which was not equipped by ANDRITZ, the motor was despatched in for repairs, throughout which an extensive study was performed. เพรสเชอร์เกจดิจิตอล in the cooling circulate and the new spots had been analyzed in additional element. The outcomes also led to the design of a brand 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 research and the implementation of its findings not only benefit the present buyer and future customers on this case, but additionally strengthen confidence within the ANDRITZ submersible motor know-how.
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