H-class combined cycle plants to replace German coal power plants

7 November 2023

GE Vernova’s Gas Power business has secured two orders from EnBW to provide H-Class natural gas-fired combined cycle power generation equipment for EnBW’s combined heat and power plants in Heilbronn and Altbach/Deizisau, near Stuttgart, the capital of the German state of Baden-Württemberg. The orders include the equipment, construction of the plants as well as software solutions, maintenance and services for ten years.

GE Vernova will lead an international consortium for the projects, including the engineering, procurement and construction companies Bonatti and SENER. The new plant will replace existing coal-fired plants with more efficient natural gas fired units while enabling future fuel mix combustion of up to 100% by volume hydrogen in the 2030s.

Heilbronn and Altbach/Deizisau efficient CHP plants are expected to deliver in total nearly approximately 1340 MW to the national grid, as well as steam for district heating for the householders, commerce and industry of Heilbronn and the larger Stuttgart area.

Each 680 MW power plant will replace existing coal-fired units at Heilbronn and Altbach/Deizisau, with the new plants targeted to begin operation by the end of 2026. Switching from a coal plant to its gas equivalent can alone reduce carbon emissions by as much 60%, and lower emissions levels for other pollutants such as mercury, NOx, SOx and particulate matter.

In conjunction with this announcement, EnBW has commenced commencement of construction work at the Altbach site – the project is aligned to the European and national regulations in the decarbonisation path towards 2050 to promote district heating in achieving the goals of efficiency, energy sustainability, use of renewables, and reduction of fossil fuel use.

Each plant will be powered by a GE 9HA.01 gas turbine, an STF-D650 steam turbine, a W88 generator, a triple pressure with reheat heat recovery steam generator and GE Vernova's integrated Mark VIe distributed control system (DCS) software solution designed to improve asset visibility, reliability, and availability while reducing operating and maintenance costs. The 9HA.01 gas turbine to be fuelled initially by natural gas, with the target of switching to 100% by volume of hydrogen in the 2030s.

The agreement includes services and maintenance for ten years, as well as GE Vernova’s Digital business’ Asset Performance Management (APM) software. Using APM Reliability in the cloud, EnBW can gain access to Digital Twin technology that allows, says GE,  for the use of predictive analytics to help reduce costs, achieve higher availability, and increase reliability and efficiency by amplifying the performance of the 9HA.01 once the power plants are operational.

Image: GE Heilbronn power plant

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