Lämpönsäilöntäkyky

Lämpönsäilöntäkyky, often translated as thermal mass or heat retention capacity, refers to a material's ability to absorb, store, and release heat. Materials with high thermal mass can absorb a significant amount of heat energy when the ambient temperature is high and then release it slowly when the ambient temperature drops. This property is crucial in building design and energy efficiency.

Common materials with high thermal mass include concrete, brick, stone, and water. These materials have a high specific heat capacity and density, meaning they can store a large amount of thermal energy per unit volume or mass. Conversely, materials like insulation, wood, and air have low thermal mass. They absorb and release heat quickly, making them effective for preventing heat transfer but not for storing it.

In buildings, thermal mass plays a significant role in moderating indoor temperatures. During the day, materials with high thermal mass can absorb solar heat or heat generated inside, preventing overheating. At night, as temperatures cool, these materials release the stored heat, maintaining a more comfortable indoor environment and reducing the need for artificial heating or cooling. This passive temperature regulation contributes to energy savings and a more stable living or working space. The effectiveness of thermal mass is influenced by factors such as the material's properties, its thickness, and its exposure to the environment.