Siemens has received a fourth order for its most efficient power plant technology from South Korea. The company is to deliver three power islands in single shaft configuration to POSCO Energy each consisting of one H-class gas turbine, one steam turbine, one generator and one heat recovery steam generator, and I&C equipment. Siemens has also been awarded the long term service contract.

The natural-gas-fired plant will have an installed capacity over 420 MW each and will reach a gross efficiency of over 61 percent. The new power units are designed for 250 starts per year, and will be capable of ramping up from a hot start to full load in only 30 minutes. Start of commercial operation is scheduled for summer 2014. The order volume including the LTP contract is approximately EUR400 million.

The new POSCO Power units will be built on the already existing site in the Metropolitan City of Incheon approximately 30 km west of Seoul. This order from South Korea following orders for the Bugok III, Ansan and Andong combined cycle power plants (CCPP) is the fourth order for the H-class technology within 18 months. In total Siemens has so far sold seven of these high-performance machines in the country.

“We opted for the Siemens H-class technology particularly because it is associated with very high efficiency and short start-up times together with a high level of operational flexibility and availability. Due to the very limited space at our site we are pleased that Siemens found the right solution to integrate and optimise the new units according to our needs. We are looking forward to execute this important project with such an experienced and reliable partner as Siemens,” said Jin-Won Park, vice president of the Construction Division of POSCO Energy. As an answer to space limitations Siemens designed the new plant in such a way that the three units will be erected in one building.

Scope of supply comprises three SGT6-8000H gas turbines, three SST6-5000 steam turbines, three hydrogen cooled SGen6-2000H generators, the SPPA-T3000 instrumentation and control system for the power plant, parts of the BoP-equipment, as well as the basic design. Siemens is also responsible for the installation and commissioning. The power plants will be of a single-shaft design. A synchronous self-shifting (SSS) clutch is installed between the generator and the steam turbine .Steam supply will be from three Benson heat recovery steam generators.