Can photovoltaic plus energy storage replace coal

Can solar power replace coal?

If solar power was used to replace a significant amount of coal fed to a power plant (operating in ‘coal saver’ mode), the overall amount could actually decrease, although this would not be the case with plants operating in ‘solar boost’ configuration.

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.

How can a coal-fired power plant improve efficiency?

Coal-fired power operators continue to look for ways to increase the efficiency and extend the working lives of their plants by improving operational flexibility and reducing environmental impact. Two possible options are explored here: combining solar energy with coal-fired power generation, and cofiring natural gas in coal-fired plants.

Can solar energy reduce coal consumption?

During daylight operation, solar energy can be used to reduce coal consumption (coal-reducing mode). As solar radiation decreases during the latter part of the day, the coal contribution can be increased, allowing the plant’s boiler to always operate at full load.

Is a coal-fired power plant profitable?

In economies where electricity demand fluctuates, a power plant that can cycle quickly to meet peaks and troughs, and also ramp down during periods of low demand, is more likely to be profitable. However, most coal-fired units can only operate as low as 30–35% load and still sustain good combustion, restricting the plant’s ability to cycle.

Will natural gas replace coal?

Substituting some coal input with gas is considered to be a low-risk option, allowing utilities to better meet changing market requirements. In the coming years, natural gas is forecast to continue partially replacing coal for power generation in some major economies.