Multinary Salt System for Storing and Transferring Thermal Energy

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This invention describes a multinary salt composition and its aqueous liquid solution that can effectively store and transfer thermal energy. The salt mixture contains significant proportions of potassium nitrite (KNO2), sodium nitrite (NaNO2), and lithium nitrate (LiNO3), with potential for additional components. The innovation achieves low melting points (often below 100°C), high thermal stability up to about 400°C, and low viscosity, making it suitable for industrial heat storage and transfer applications, such as in solar power plants.

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• Thermal energy storage in solar power plants, especially for storing and transferring heat collected during the day for use at night or during cloudy periods.
• Heat transfer fluid in power generation plants, including nuclear, biomass, or waste-to-energy facilities.
• Thermal management and heat transfer in chemical reactors and other industrial processes requiring controlled heating or cooling.
• Use in vulcanization processes and machinery requiring high-temperature heat transfer fluids.
• As a coolant or heating medium in various industrial systems.
• Potential use as a working medium in machinery for lubricating, transmitting force, or other technical applications involving movement.

BenefitsContent extracted from patent full text and abstract with AI.

• Lower melting point compared to conventional salt mixtures, allowing operation at lower temperatures and reducing energy needed for heating.
• High thermal stability up to about 400°C, enabling safe and long-term storage of thermal energy.
• Low viscosity, which improves flow characteristics and efficiency for heat transfer, and minimizes risks of blockage in piping systems.
• Reduced corrosion due to absence of corrosive halides, enhancing longevity and reliability of equipment.
• Simple handling and low cost of materials; easily producible salt mixtures.
• Non-toxic and non-flammable, improving safety and environmental compatibility.
• Allows easy maintenance; the salt can be dissolved in water and fully removed from systems as needed.
• Adaptable formulation that can be tuned for specific industrial needs by adjusting salt composition.

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Patent Abstract

Salt composition containing an amount of at least 10% by weight KNO2, an amount of at least 15% by weight NaNO2, and an amount of at least 10% by weight LiNO3. Salt aqueous liquid solution containing the salt composition. Use of a salt composition or salt aqueous liquid solution for storing and/or transferring thermal energy.