Pilsen (26/10/2020) – To keep Doosan Škoda Power steam turbines running smoothly over the long-term, they need due care through regular inspections. This is the case with the steam turbine in the Sandvik 3 power plant in the Swedish city of Vaxjö, which Doosan Škoda Power engineers from Pilsen examined during an annual inspection visit. Following the inspection recommendations, the engineers and the power plant operator, Växjö Energi AB, agreed to implement an overhaul of the DST-G20 steam turbine. The turbine has an output of 39 MW and produces electricity and heat at the biomass incinerator for approximately 100,000 residents in the city and environs.

“Parts wear out on practically every generating unit that is used daily and regularly exposed to high temperatures and pressure. With proper maintenance, the turbine can serve for many years, which is why we offer long post-warranty service with the option of overhauls and replacement of worn parts,” says Jan Houdek, Project Manager at Doosan Škoda Power.

After the turbine is inspected and required spare parts are supplied, the next step is to disassemble the machinery, which is handled by teams of 5–8 which include designers, welders, electricians and fitters. The team is supervised by two chief head fitters, each of whom is in charge of a different part of the unit – one oversees the turbine, while the other is in charge of the steam control system. While technicians at Vaxjö were completing the dismantling, components that could not be repaired on-site, such as the rotor, the inner casing and the stator guide wheels, arrived in Pilsen. The opposite procedure awaited the team in Sweden during September, when the unit was re-assembled and subsequently commissioned, which was scheduled for the 18th of October.

In cases where the turbine needs to be replaced by a newer model to increase efficiency or capacity, Doosan Škoda Power also offers retrofit and modernization services for steam turbines of its own or third-party production. Steam turbine servicing mainly means overhauls with replacement of worn components as well as long-term post-warranty service. “We offer specialized 3D scanning services, reverse engineering, a remote monitoring system, as well as technical consultancy, repair and replacement of spare parts. These services can be provided directly at the power plant including on-site machining,” adds Adam Bajer, Sales & Service Manager at Doosan Škoda Power. 

Doosan Škoda Power is part of a strong group of companies united under the Doosan Group, which supplies leading technologies and services of the highest quality and value to customers all over the world.

Doosan Škoda Power is a leading global manufacturer and supplier of power plant equipment, especially steam turbine/generator sets with outputs between 3 and 1,200 MW. The company has extensive experience and references in applications for steam-driven and fossil-fuel-fired power plants, CHPs, nuclear and solar power plants (CSPs), biomass plants, energy-from-waste plants and in industrial applications for oil and gas, pulp and paper, and many more. As regards services, the company offers retrofits and modernization (R&M) of installed OEM and non-OEM equipment, overhauls and long-term service including spare parts delivery. Annual research and development investments guarantee high quality products that meet specific customer requirements.