Can solar power be combined with coal-fired power plants?

Two possible options are explored here: combining solar energy with coal-fired power generation, and cofiring natural gas in coal-fired plants. Both techniques show potential. Depending on the individual circumstances, both can increase the flexibility of a power plant whilst reducing its emissions. In some cases, plant costs could also be reduced.

Can solar power be used in a coal-fired power station?

The incorporation of solar energy into an existing coal-fired power station has the potential to increase overall plant efficiency, reduce coal demand and CO2 emissions, plus minimise the problem of solar power’s variability.

How much solar power can a coal-fired power plant absorb?

believes that a large coal-fired power plant would be capable of absorbing between 200 and 400 MW of solar thermal power. This would significantly increase plant efficiency and reduce environmental impact (Fairley, 2009).

Can solar power save coal?

If the solar potential exceeds the turbine’s extra capacity, coal-saving is possible. On current coal-solar hybrid plants, solar steam feeds only the highest-pressure preheater, but other hybridisation concepts could be adopted and combined to increase the solar share, especially on greenfield projects (Siros and others, 2012).

Is solar power a viable alternative to coal?

Additionally, the advancement in solar technology and the decrease in solar panel costs have made solar power more accessible and a viable alternative to coal. Coal-based power systems require substantial capital investment to establish large power plants and the associated infrastructure.

Can solar power boost a coal plant?

When adequate solar intensity resumes, the coal plant can be ramped down once again. Alternatively, the increased steam flow produced by the solar boiler can be fed through the existing steam turbine, boosting output (so-called ‘solar boost’).