Reducing Emissions through Fuel-mix Flexibility and Natural Gas Repowering
In 2019, we launched plans to maximize the flexibility of the three units at the Genesee Generating Station to utilize both natural gas and coal as fuel. Expanding the use of natural gas will result in significantly lower absolute emissions relative to the current configurations of the units. These modifications will provide the Genesee facility with operational flexibility to optimize the fuel-mix at the units between coal and natural gas in response to market conditions and enable the facility to remain as a source of competitive, reliable and responsible baseload power generation for Alberta until all units at Genesee are eventually converted to natural gas.
In 2020, we initiated plans and stakeholder engagement for the repowering of Genesee Units 1 & 2 to natural gas combined cycle (NGCC) generation units. Located entirely within the footprint of the existing Genesee Generating Station, the repowering project would involve installing new gas-fired combustion turbines and heat recovery steam generators, while utilizing the existing steam turbine generators. Each of the two repowered units will increase its gross generation capacity potential to 732 MW from 430 megawatts (MW). The repowered assets will utilize best in class, hydrogen-ready NGCC technology and are expected to set a new standard for gas generation efficiency in Alberta. Based on a successful outcome of the regulatory process for the NGCC repowering project, Genesee 1 would move directly to becoming a dedicated NGCC unit by 2023; Genesee Unit 2 would become a dedicated NGCC unit by 2024.
There are significant environmental benefits expected from the project, including reduction in emissions associated with coal-fired power generation such as carbon dioxide (CO2), sulfur dioxide (SO2), nitrogen oxide (NOx), particulate and mercury emissions. For example, the carbon emissions intensity of using natural gas as a fuel source will decrease CO2 by approximately 60% when compared to emissions when the units are running on coal. In addition, overall water usage for the repowered units will be reduced with the new technology by at least half. Learn more.
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