Andritz’s submersible motor technology success

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 gas. From water bottles to the insulation in our houses, natural gas is a key ingredient in just about each product we use every day. According to the most recent report issued by the International Gas Union (IGU) in 2019, the worldwide demand in gasoline has been rising by 35% of the past decade alone.
The causes for this development are manifold, however the IGU determines three major elements. First, the price competitiveness of gas in distinction to different power sources. Secondly, greater safety of supply with regard to infrastructure, supply, and flexible use. Thirdly, gas represents a sustainable form of power that may mitigate local weather change and decrease localized air pollution. It has 50% fewer CO2 emissions in comparability with coal, for example.
In order to satisfy this rising demand and use, the eco-friendly potential gasoline must 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 contains 52 wells combined in sixteen fuel fields and related by 300 km of oil pipelines. As of December 2018, the field has estimated resources of 9.9 million commonplace cubic meters of oil equal of oil and 51.1 million commonplace cubic meters of oil equal of gasoline.
The system used contains three important areas: Åsgard A, B, and C. Åsgard A is a floating oil manufacturing vessel that has been anchored there completely since extraction began 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 fuel pipeline to the Karsto processing complex to the north of Stavanger, Norway.
First in the world Aker Solutions ASA has been supporting the Åsgard fuel field with numerous gas field merchandise, techniques, and services since 2010. In time, the strain within the storage facility in gas-producing fields drops. Compressors are needed to sustain the output. Aker delivered the first-ever underwater compressor system worldwide to Åsgard in order to increase 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 recovery rates are improved and the funding and operating costs are reduced. In addition, underwater compression leaves a smaller ecological footprint and is extra reliable than a platform. The Åsgard system consists of modules for two similar sets of compressors, pumps, scrubbers, and coolers. The motors wanted to drive the pumps come from ANDRITZ.
Small, however essential
In 2010, Ritz Pumpenfabrik GmbH in Schwäbisch-Gmünd, Germany, grew to become 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 properly pumps, bottom intake pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the world of application, the motors can be made of forged iron, bronze or totally different type of chrome 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 know-how. In designs with interior everlasting magnet motor expertise, or IPM for short, these maintenance-free motors can obtain impressive outputs, efficiencies and, as a result, value savings.
The effective and measurable motor cooling system retains the inside temp- erature as little as attainable. 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 nearby thrust bearing. By doing so, the impeller ensures there’s a constant circulate of cooling liquid in the proper path.
This liquid moves through the inside of the motor from the bottom to the highest. The specifically developed cooling channels define the exact path over all heat sources to discharge the heat successfully and systematically. At the top end, the warmth from the liquid is then discharged via the motor’s outer wall. Here, it’s transferred via the surface 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 are also an especially necessary half. The complete 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 with none faults. เกจวัดแรงดันไอน้ำ 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 these liquids that are eliminated by the separator upstream of the gas compressors.
In 2017, because of a failure in a half of the system which was not equipped by ANDRITZ, the motor was despatched in for repairs, throughout which an extensive study was conducted. Thermal distribution within the cooling flow 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 also completely overhauled and fitted with a new winding and a model new rotor. This study and the implementation of its findings not solely profit the present buyer and future clients in this case, but also strengthen confidence in the ANDRITZ submersible motor technology.

Scroll to Top