Andritz’s submersible motor expertise 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 outcomes.
We are surrounded by gasoline. From water bottles to the insulation in our houses, pure gas is a key ingredient in just about each product we use every day. According to the newest report issued by the International Gas Union (IGU) in 2019, the worldwide demand in fuel has been rising by 35% of the previous decade alone.
The causes for this pattern are manifold, however the IGU determines three main components. First, the price competitiveness of fuel in contrast to other vitality sources. Secondly, higher security of provide with regard to infrastructure, delivery, and versatile use. Thirdly, Whopping represents a sustainable type of power that may mitigate local weather change and decrease localized air pollution. It has 50% fewer CO2 emissions compared to coal, for instance.
In order to fulfill this rising demand and use, the eco-friendly potential gas will have to be extracted using a sustainable course of. One of the largest techniques is the Åsgard oil and gas area on the Haltenbanken, 200 km off the coast of Norway. It contains 52 wells mixed in sixteen gas fields and related by 300 km of oil pipelines. As of December 2018, the sector has estimated resources of 9.9 million standard cubic meters of oil equivalent of oil and 51.1 million standard cubic meters of oil equivalent of fuel.
The system used comprises three important areas: Åsgard A, B, and C. Åsgard A is a floating oil manufacturing vessel that has been anchored there completely 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 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 gasoline subject with various fuel area products, techniques, and services since 2010. In time, the strain in 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 to find a way to enhance the output to 306 million barrels. These are usually installed on platforms above sea level.
However, Åsgard is based on an underwater system. By utilizing compressors on the seabed the restoration charges are improved and the investment and working prices are lowered. In addition, underwater compression leaves a smaller ecological footprint and is extra dependable than a platform. The Åsgard system consists of modules for 2 equivalent sets 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, 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 suitable for driving deep properly pumps, backside consumption pumps, suction pumps, seawater pumps, and underwater machinery.
Depending on the realm of software, the motors can be manufactured from cast iron, bronze or different sort of stainless steel and put in 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 interior everlasting magnet motor technology, or IPM for short, these maintenance-free motors can obtain spectacular outputs, efficiencies and, consequently, value savings.
The effective 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 finish of the rotor. One of its two primary duties is cooling and lubricating the nearby thrust bearing. By doing so, the impeller ensures there is a constant flow of cooling liquid in the best path.
This liquid strikes via the inside 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 successfully and systematically. At the highest end, the warmth from the liquid is then discharged by way of the motor’s outer wall. Here, it is 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, however they’re additionally an extremely necessary part. The whole underwater station can not operate 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 forms the condensate unit along with the pump and conveys those liquids that are eliminated by the separator upstream of the gasoline compressors.
In 2017, because of a failure in part of the system which was not provided by ANDRITZ, the motor was sent in for repairs, throughout which an in depth research was carried out. Thermal distribution in the cooling circulate and the recent spots have been analyzed in more 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 utterly overhauled and fitted with a brand new winding and a model new rotor. This examine and the implementation of its findings not only benefit the current buyer and future customers on this case, but also strengthen confidence in the ANDRITZ submersible motor expertise.
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