We can compare ClimSel with a battery. The difference is that a battery stores electricity while ClimSel stores energy. This energy storage comes courtesy of the phase change properties of ClimSel and PCM. Nature’s most common PCM – phase change material – is water which, as we know, goes from solid to liquid, i.e., makes a phase change at around 0°C. The characteristic aspect of this phase change is that it is highly energy-intensive. The energy provided is primarily used to change the material’s phase (from solid to liquid or vice versa), and not to change its temperature during the phase change, thereby providing a virtually constant temperature.

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The illustration shows how the material is affected during the phase change from the solid to liquid state. When the material is in a solid state, there is an increase in temperature as energy is provided. In contrast, when the material enters the phase change zone, the energy provided is used for the phase change, i.e., the gradual transition from solid to liquid form. During this phase, there is no increase in the temperature of the material. Once the phase change has been completed and the material is completely liquid, the energy provided results in the temperature of the material starting to rise again.

By making use of the properties of the phase change, ClimSel can actually move energy in time and create a temperature range at the required temperature level. The phase change takes place at different energy levels for different ClimSel products – from approximately - 21°C/-5.8°F to + 70°C / 158°F. The choice of specific ClimSel product can, therefore, be based on the temperature levels that apply for each application.
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