Enabling the transformation to a low-carbon society

Fully committed to being part of the solution for a better tomorrow, we have set science-based targets to reduce greenhouse gas emissions in line with the goals of the Paris Agreement.
Thumbnail image for a video introducing our science-based targets

Are you up for a challenge?

Join us on an interactive journey to learn more about our culture.
Atlas Copco colleagues in discussion.

Innovation stories

Do you want to learn about our innovations? How operators benefit from our ergonomic equipment or how we secure a minimal impact on the environment?
Corporate people observing parts of products in the field, cover image, ideas, backlight, touch screen

Our annual Industrial Ideas magazine

features stories about how we innovate for a sustainable future and push technology and society forward together with our customers.
Atlas Copco's Industrial Ideas magazine
Close

Atlas Copco nitrogen generators help eliminate corrosion at major Portuguese power plant

June 11, 2015

Geography:
Europe

Situated in Gondomar, in the north area of Portugal, Tapada do Outeiro combine cycle power station produces 15-20 percent of the country’s electrical needs. The company relies on an NG 81 generator from Atlas Copco Rental to supply pure nitrogen to replace the air in the steam generator’s tubes when they are not in use, eliminating corrosion.

Carlos Carqueja

The power plant at Tapada do Outeiro represents a new era in the production of electrical energy in Portugal. Using combined cycle gas turbine (CCGT) technology to generate power, the CCGT power station has three groups of turbo generators, producing electric power from natural gas. The gas is burned in a gas turbine, which is similar in operation to an airplane turbine. The gas from the exhaust, which is extremely hot, goes into the steam generator like a steam boiler, heating the water and transforming it into superheated vapor. The vapor is then used to engage another turbine similar to the ones used in coal thermoplants. An alternator is then driven by both turbines, gas and vapor, creating power. Carlos Carqueja, engineering manager of the company, explains the fundamental role Atlas Copco Rental’s NG 81 generator has in the operation of the plant. “Nitrogen is used to preserve the steam generators. When they are not in use, air goes into the tubes, so the steam generators can suffer corrosion. The replacement of air by high-quality nitrogen eliminates the corrosive effect on the steam generator.”

He also adds that “the rental option, allow us, at a very reasonable cost, to test the technical viability of keeping a very poor oxygen atmosphere with the nitrogen generators for long periods.

After two months, Tapada do Outeiro is very satisfied with the quality and reliability of the equipment, which has required no maintenance since it has been in operation. The company is also pleased with the technical team supporting the equipment.

I would not hesitate to recommend a rental solution from Atlas Copco to other plants with the same needs.

states Carqueja

Written by Olivia Gambin

Nitrogen generator NG 81 nitrogen generator Portugal Europe Reliability Quality