Glossary
Molten salt storage
Molten salt storage is a thermal technology found predominantly in the renewable energy sector. This technology employs very high heat-resistant salts, commonly a mixture of sodium and potassium nitrate, which retain thermal energy (heat) that can be stored and later converted back into electrical energy on demand.
This technology has garnered significant attention as part of large-scale solar thermal energy projects. In this setting, sunlight concentrated by mirrors heats the molten salts. The stored heat is used to create steam by heating water, which then drives a traditional steam turbine to generate electricity. This process essentially produces a renewable source of thermal energy that is not susceptible to the intermittency associated with renewable energy sources such as wind and solar.
A key attribute of molten salt storage technology is the ability to store energy for use during periods of low-electricity demand and then dispatch this stored power to the grid during peak demand periods. This capacity for energy storage is what makes molten salt storage a significant innovation in the journey towards a reliable, renewable energy future.
Moreover, molten salt storage brings stability to power grids dependent on unpredictable and fluctuating sources of renewable energy without adding environmental pollutants. Furthermore, this technology aligns well with carbon accounting goals as it represents a clear reduction in carbon emissions when compared to fossil fuel-based energy production mechanisms.
Although the expansion of this technology remains dependent on advancements in research and a decrease in manufacturing costs, molten salt storage undeniably holds promise as a solution to the global quest for a sustainable, zero-emissions energy landscape. The adoption and further development of this technology is crucial for the reduction of greenhouse gas emissions and advancing the renewable energy transition.