A Significant Steam Upgrade

Siemens announced it recently signed an agreement with Shanghai Shenergy Energy Technology Co., Ltd. (Shenergy Technology) to implement a high-temperature subcritical upgrade for a 320 MW steam turbine unit at Xuzhou Power Plant, a subsidiary of China Resources Power Holdings Co., Ltd (CR Power) in Jiangsu province.

It is estimated that the upgrade will enhance the unit’s power output efficiency up to 42.9%, reduce its emissions by more than 10% and extend its overhaul interval from six to 12 years. This will increase the generation revenue of the plant while reducing maintenance costs significantly, Siemens said. The project is expected to be concluded in mid-2019.

In this project, Siemens said the main steam and hot reheat steam temperature will be raised from 537º  to 600º. In addition, the project will include adopting control stage, advanced blade designs, such as 3DS and 3DV blades, and additional steam extraction for the A0 high-pressure pre-heater.

Siemens said that over the past 36 years, it has upgraded more than 300 large-scale steam turbines worldwide.