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 outcomes.
We are surrounded by gasoline. From water bottles to the insulation in our houses, pure gasoline is a key ingredient in nearly each product we use day by day. According to the most recent report issued by the International Gas Union (IGU) in 2019, the global demand in fuel has been rising by 35% of the past decade alone.
The reasons for this trend are manifold, however the IGU determines three major elements. First, the cost competitiveness of fuel in contrast to other energy sources. Secondly, greater security of provide with regard to infrastructure, delivery, and flexible use. Thirdly, gasoline represents a sustainable type of energy that may mitigate local weather change and decrease localized pollution. It has 50% fewer CO2 emissions in comparability with coal, for example.
In order to fulfill this growing demand and use, the eco-friendly potential gasoline must be extracted using a sustainable process. One of the most important methods is the Åsgard oil and fuel field on the Haltenbanken, 200 km off the coast of Norway. It accommodates 52 wells mixed in 16 fuel fields and linked by 300 km of oil pipelines. As of December 2018, the field has estimated sources of 9.9 million standard cubic meters of oil equivalent of oil and 51.1 million commonplace cubic meters of oil equivalent of gasoline.
The system used comprises three essential areas: Åsgard A, B, and C. Åsgard A is a floating oil manufacturing 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 gas pipeline to the Karsto processing advanced to the north of Stavanger, Norway.
First in the world Aker Solutions ASA has been supporting the Åsgard gas subject with varied gasoline field products, methods, and companies since 2010. In time, the strain within the storage facility in gas-producing fields drops. Compressors are wanted to maintain 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 relies on an underwater system. By utilizing compressors on the seabed the restoration rates are improved and the funding 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 2 similar sets of compressors, pumps, scrubbers, and coolers. digital pressure gauge wanted to drive the pumps come from ANDRITZ.
Small, however important
In 2010, Ritz Pumpenfabrik GmbH in Schwäbisch-Gmünd, Germany, turned 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 suitable for driving deep properly pumps, backside consumption pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the area of utility, the motors may be manufactured from forged iron, bronze or totally 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 particular cooling technology. In designs with inside permanent magnet motor technology, or IPM for brief, these maintenance-free motors can achieve impressive outputs, efficiencies and, as a result, cost financial savings.
The effective and measurable motor cooling system keeps the inside 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 supply is mounted on the decrease shaft finish of the rotor. One of its two major tasks is cooling and lubricating the nearby thrust bearing. By doing so, the impeller ensures there is a fixed flow of cooling liquid in the right path.
This liquid moves via the inside of the motor from the underside to the highest. The specially developed cooling channels outline the precise path over all heat sources to discharge the heat successfully and systematically. At the highest end, the warmth from the liquid is then discharged through the motor’s outer wall. Here, it is transferred via 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, but they are additionally a particularly essential half. The entire underwater station cannot function without 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 forms the condensate unit along with the pump and conveys those liquids which might be removed by the separator upstream of the gasoline compressors.
In 2017, as a result of a failure in a half of the system which was not equipped by ANDRITZ, the motor was sent in for repairs, throughout which an in depth study was performed. Thermal distribution in the cooling circulate and the new 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 additionally fully overhauled and fitted with a new winding and a model new rotor. This examine and the implementation of its findings not only profit the present buyer and future customers in this case, but additionally strengthen confidence in the ANDRITZ submersible motor know-how.
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