The main advantages of using thermal energy storage (TES) in solar power plants, particularly concentrating solar power (CSP) plants, are as follows:
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Enables Energy Dispatchability and Flexibility
TES allows solar thermal power plants to store heat generated during sunny periods and use it later to generate electricity when the sun is not shining (e.g., at night or during cloudy weather). This overcomes the intermittency challenge of solar energy and provides a reliable, dispatchable power supply. -
Enhances Grid Stability and Integration
By storing thermal energy and producing electricity on demand, CSP plants with TES can better match electricity supply with demand, reducing curtailment and stabilizing the grid. -
High Efficiency in Energy Conversion and Storage
Solar thermal systems combined with TES achieve high efficiencies in converting sunlight to usable heat and storing it with relatively low losses compared to some other storage methods. -
Cost Savings and Economic Benefits
TES enables the use of solar energy beyond daylight hours, reducing reliance on fossil fuels and lowering energy costs. It also helps industries and power producers hedge against price volatility in gas and electricity markets by storing surplus energy when prices are low for later use. -
Rapid Implementation and Scalability
TES technologies, such as two-tank or thermocline systems, have been tested and implemented since the 1980s, providing proven, scalable options that can be integrated into existing solar thermal plants with relative ease. -
Supports the Transition to Renewable Energy
TES plays a crucial role in making renewable energy sources more economically viable and dependable, thus supporting broader adoption and helping reduce carbon emissions.
In summary, thermal energy storage enables solar power plants to deliver clean electricity on demand, improve economic returns, increase system efficiency, and aid in the transition to a sustainable energy future.
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