Coal Power Plants Could Support Cleaner Energy

12/20/2013 |

Coal power plants may be able to contribute to a cleaner energy system.

Can coal power plants cut it when it comes to efficient, clean energy? A new study shows that coal generation plants can be modified to fit within a cleaner energy system.

The report, Flexible Coal: Evolution from Baseload to Peaking Plant, summarizes the findings from a coal generating station that has been modified to operate more flexibly, with the ability to cycle on and off daily and run at low generation levels. The report was prepared by analysts from the Energy Department's National Renewable Energy Laboratory (NREL) and Intertek for 21st Century Power Partnership.

"This study proves that coal can be part of a power system with high levels of renewable energy," said NREL's Jaquelin Cochran, a lead author of the report. "Coal plants can be modified to respond to the changing output of renewable energy and run at low levels when renewable electricity generation is high but demand is low, such as at night. There is a cost to this flexibility, but these costs can be minimized with strategic modifications and maintenance."

The power sector's transition to greater levels of renewable energy, demand response, and other emerging technologies requires flexibility in terms of power generation. It will favor plants that can cycle on and off multiple times per day and be turned down to low levels. The ability of other coal plant operators to replicate the flexibility of the studied plant will be instrumental in valuing coal in an increasingly low-carbon energy system, according to the study.

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