Doosan Škoda Power Supplies Back-Pressure Turbines for Plock Plant

The ORLEN Group awarded Doosan Škoda Power (Doosan) €125 million to supply two 55-MW back-pressure steam turbines, a two-pole generator, and conduct project execution for its heat-and-power plant in Plock, Poland. The project’s civil works phase will modernize two turbine sets, units TG4 and TG5, with full completion scheduled for 2029. Previously, Doosan completed the 70-MW Orlen Plock TG7 project in 2017.

“This investment is being realized as an EPC contract, which means a turnkey delivery of technology—from the design of the turboset through manufacturing, installation, and commissioning,” said Tomáš Winkler, Head of Project Management Department at Doosan Škoda Power. “The newly supplied turbosets and associated technology will have 9% higher efficiency compared to the original technology, which will significantly contribute to more efficient electricity and heat generation and reduced operating costs as well as environmental footprint.”

Specifically, the order includes two single-casing extraction DST-S10 back-pressure steam turbines and a two-pole generator, with the first turboset component deliveries taking place in early 2025. Doosan will also supply transformers, bus ducts, and install two underground 30-kV high-voltage cable interconnections between the existing and new switch gear. Lastly, the company will execute foundation construction using micropiles.

DST-S10 steam turbine set | Image Credit: Doosan Skoda Power

“The newly supplied units are significantly more complex in terms of layout and redundancy and must be integrated into available existing layout,” said Winkler. “To ensure maximum precision and minimize risks, we utilized 3D-scanning technology, which formed the basis for detailed design preparation.”

Doosan must complete reconstruction while six existing units, boilers, and technological equipment remain in full operation, presenting a significant challenge that requires extensive coordination. The company has been on the Plock construction site for eight months, nearly completing its civil works phase before following phases. TG4 assembly may be fully completed by year-end 2025, with operational handover scheduled for October 2026. In order to maintain continuous and safe operation, the project is divided into two stages:

• Following a six-month break, in which the owner shuts down and disassembles TG5, work will resume
• Doosan begins work on TG5’s second unit, with operational handover scheduled for mid-2029

The contract also includes a 10-year service agreement for each modernized turboset.

LNG Storage Tanks

This week, the Korea Gas Corp. (KOGAS) awarded Doosan Enerbility KRW 560 billion to build three LNG storage tanks and ancillary facilities, each with 270,000-kiloleter capacity, for the Dangjin LNG Terminal Phase 2 project in South Chungcheong, South Korea. Construction will begin in September 2025, with completion anticipated by December 2029.

Building out the Dangjin LNG storage tank infrastructure falls under the broader LNG Production Base Project at the Dangjin Seokmun National Industrial Complex, which intends to improve South Korea’s LNG supply-demand balance. During Phase 1 in 2021, Doosan Enerbility completed roof air-raising work for four LNG tanks and is currently executing internal construction work.

Doosan & HD Hyundai

In early May 2025, Doosan Enerbility and HD Hyundai Marine Engine signed a two-part memorandum of understanding to develop precision-casting manufacturing technologies for gas turbines and prototype blade materials, i.e., rotating airfoils connected to the rotor.