lämpösäilytys

Lämpösäilytys is a Finnish term that translates to thermal energy storage or heat storage. It refers to the process of storing thermal energy for later use. This stored energy can be in the form of sensible heat, latent heat, or thermochemical heat.

Sensible heat storage involves increasing or decreasing the temperature of a material. Common materials for sensible heat storage include water, concrete, and rocks. For example, heating water in a tank during the day and using it for space heating at night is a form of sensible heat storage.

Latent heat storage utilizes the phase change of a material, such as melting or freezing. Phase change materials (PCMs) absorb or release large amounts of heat at a constant temperature during their phase transition. This allows for a compact storage of thermal energy. Examples of PCMs include paraffin waxes and salt hydrates.

Thermochemical heat storage involves reversible chemical reactions. These reactions absorb heat when they occur, storing energy in chemical bonds, and release heat when reversed. This method can store heat at high energy densities and for long durations, but it is generally more complex and expensive than other methods.

Lämpösäilytys systems are employed in various applications, including building heating and cooling, industrial processes, and renewable energy integration. They play a crucial role in improving energy efficiency, reducing reliance on fossil fuels, and stabilizing energy grids by balancing supply and demand. By storing excess heat generated during peak times, lämpösäilytys systems ensure that energy is available when needed, leading to more sustainable and economical energy management.