Teekay Tankers

Alconza supplies generators and motors for 4 state-of-the-art shuttle tanker vessels

In December it was announced that Teekay Tankers had placed a contract with the Samsung Heavy Industries (SHI) yard for four shuttle tankers designed to be the most environmentally friendly shuttle tankers ever built.

Shuttle tankers load crude oil from offshore platforms working under dynamic positioning conditions, transport oil relatively short distances to land-based terminals, discharge the cargo and return to the platform.
Power systems will operate on a combination of liquefied natural gas (LNG), as a primary fuel, and volatile organic compounds (VOC) which is the environmentally harmful gas evaporating from the oil cargo tanks – as a secondary fuel. A recovery plant uses compression and cooling phases to liquefy the heavier hydrocarbons to liquid VOC (LVOC) that is stored in a tank on the deck of the vessel. The LNG and LVOC will be used in combination as the main power source for the Wärtsilä 34DF engines. Methane gas emerging from the crude oil cargo during loading or transit, referred to as surplus VOC, is burnt in a gas turbine for electricity generation.
34DF engines together with 5.5MW Alconza´s generators are the main power source for the full electrical system that energizes the vessel, a hybrid solution which includes 4x 3.8MW propulsion motors designed and manufactured by Alconza and Wärsilä batteries for peak load saving, and added overall system redundancy.
Compared with the current standard of shuttle tankers, the new design will improve fuel economy by 22%, reduce annual emissions of CO2 equivalents by up to 42%*, the reduction equals the emissions from 22.000 cars per vessel per year.
The elimination of VOC emissions to the atmosphere will eliminate 84% of NOx from the engine exhaust, practically eliminate SOx emissions, and reduce particles to less than 4%. (Storage and loading of crude oil onto ships are responsible for more than 50% of Norway’s VOC emissions)
One of the most critical systems on board of a Shuttle Tanker is the Dynamic Positioning System (DP2) that allows the vessel to maintain a fixed position despite external forces, such as wind, waves and current. To achieve that the computer automation system contains a mathematical model that includes information captured from a satellite-based GPS, wind sensors and gyrocompasses to detect positioning deviations, once the information is collected the control system ask for an instant response to the azimuth thrusters and tunnel thruster fabricated by Alconza in complete synchronization with the electric propulsion motors.
Wärtsilä´s Eniram performance management system concept is also included into the technical features of the ship, a data collection platform with the capability to optimize vessel´s operations providing analytics and reporting for a real-time decision making.


* From a typical North Sea platform installation, each crude oil loading of a cargo size of 850.000 bbls, will recover 100 tons of LVOC and 10 tons of SVOC. By avoiding these amounts of VOC escaping into the atmosphere, the yearly reduction of emission goes from 43.000 to 25.000 tons of CO2, i.e., a reduction of 42%, assuming around 32 loadings per year.

With an average of 100 tons of recovered LVOC per loading, the recovered amount could represent up to 30% the total fuel consumption of the Shuttle.

Tenneelva HPP, new contract

Recently we have received an order from Energi Teknikk to provide one generator for Tenneelva HPP. For this project Energi Teknikk has been selected by Tussa Energi to provide the complete electromechanical package.

This time Alconza will design and manufacture one 4 MVA vertical generator at 750 rpm. This new generator increases our presence in the hydropower market in Norway.

Tussa Energi, an important player in the Norwegian market, trusts again in Alconza for this HPP. Alconza has manufactured several generators for Tussa Energi over a period of 20 years working together and we are sure Tenneelva will be also a successful project.

We are really proud to cooperate with this leading companies and to work again in Norway, where we have more than 40 generators installed.

Smakraftdagane 2018

Smakraftdagane 2018

Annual exhibition Smakrafdagane will take place next week in Norway. This exhibition is an important meeting point for all the main players who work in the small hydropower business in Norway. Between 20 and 22 March our Hydro Sales Manager and our Service Manager will be at your service in booth 32 at Quality Hotel Edvard Grieg (Bergen).

Norway has been one of our main business areas during the last years and we are sure it will keep on being for the next years. It will be a pleasure for us to see you at our booth to share ideas and strategy.

Vessel of the year 2018

Maersk Master: Vessel of the year 2018


Maersk Supply Service ´s vessel Maersk Master has been awarded Vessel of the year at the annual Offshore Support Journal Conference in London.
She is equipped with two PTI propulsion motors (Power Take In), five thruster motors and powered by five medium speed main generators from Alconza Berango S.L providing high reliability, fuel economy and dynamic position class 2.

The challenge was to design and build customized motors and generators due to the special requirements of the project. The solution was to develop special design criteria concerning the structural aspect taking also into consideration the interface with the rest of the equipments inside the engine and thruster rooms.  

The vessels will support Quadrant Energy’s Phoenix South and Van Gogh drilling campaign, which will initially cover three wells for a duration of 150 to 200 days. This highly modern and efficient vessel will be supporting Transocean’s semisubmersible rig DD1 with supply and anchor handling duties throughout the campaign.


Maersk Master


Norwegian Gannet

Alconza will supply the electric propulsion system of the first of its kind hybrid vessel destined for aquaculture

Norwegian Gannet, will be the first hybrid vessel dedicated to aquaculture.

We are talking about a Factory-Ship, a new concept in the sector that seeks to reduce operating costs and above all to minimize the environmental impact.

Hav Line commissioned the design of the vessel and the manufacture of the engines to Wärtsilä, which will supply to Balenciaga shipyard with an integrated solution that combines a Wärtsilä 31 10-cylinder diesel main engine together with an electric propulsion system, manufactured by Alconza, capable of providing excess power on demand by reducing fuel consumption and absorbing engine load fluctuations, thus providing high efficiency while minimizing emissions.
Each delivery of the ship is calculated, will replace the use of about 50 trailers (7,000 a year), which will significantly reduce the polluting emissions associated with the entire process.
The ship, which will be launched in the month of April, has all the conditions to be one of the ships with the most technology that has left the Basque shipyards.


Wärtsilä design features the world’s first hybrid propulsion solution for fish farming industry

Balenciaga botará en abril su primer buque impulsado por un motor híbrido