The technology behind Swerod
PCM with unique properties
Swerod is based on 30 years of research into how energy storage can be enhanced by harnessing the specific characteristics during phase changes in different materials. Phase change is the process that occurs when different substances change from solid to liquid form as their temperature changes, and to accomplish this, energy must be supplied.
PCM (Phase Change Materials) are substances with unique properties that are ideally suited for energy storage – high melting points and vast energy storage capacity. For heat storage, PCMs are available with phase changes between +30 °C and +70 °C and for cold storage there are PCMs with phase changes between +5 °C and +20 °C. Water changes phase at 0 °C, the least optimal temperature in terms of energy storage.
Vast energy storage
If energy in the temperature range 43-52 °C is used to heat water and a PCM, these processes are very different from an energy storage perspective. Water is heated very quickly, thereby storing very little energy. With the PCM however, this energy is transferred at the phase change point and the material undergoes a gradual melting process from solid to liquid form. The result is energy storage that is up to 15 times more effective than water in the same temperature interval, making the PCMs a highly efficient substance for storing energy.