OC Autarkis: the products

PCM: changing the world

Phase change materials are materials in which the change from solid to liquid and vice versa is used to store or release heat or cold. OC Autarkis has chosen for an application which uses macro-encapsulated inorganic salts that are non-flammable. PCMs store energy for later use. PCM behave like thermal batteries and are thus very suitable for use as a heat/cold buffer.

As a result of its thermal battery characteristics, a correctly applied PCM can reduce variations in indoor temperature with respect to conditions of daily variation like outside temperature, solar radiation and indoor loading. The principle of phase change materials functioning as heat accumulating materials is as follows: The material absorbs heat from its surroundings and melts, cooling its environment. When the temperature drops the material solidifies by emitting heat into the environment, which is then heated. The result is a more constant temperature inside the building with significant reduction of the need (and in some cases no need) to install additional cooling and heating capability. This results directly in reduction of the use of cooling and central heating installations and delivers substantial energy savings and reduced CO2 emissions.

The best-known PCM is water. Water freezes at 0 degrees Celsius and can then store energy. This energy can be released later, for cooling. This technique was used as early as around 1865 for cooling warehouses and buildings ( ASHRAE - A History of Comfort Cooling Using Ice). Many modern situations do not require cooling at 0ยบ Celsius. Today we are able develop PCMs that solidify and melt at a selected temperature. These phase changes take place at a constant temperature and the melting and solidification process can be repeated through an infinite number of cycles without affecting the physical or chemical properties.

Some unique features of our PCM solutions:

- Any solidification or melting point can be constructed.

- Non-toxic, non-combustible, inorganic salt hydrates are used.

- Using macro-encapsulation the PCM is packed in HDPE panels which form the basis of

modular PCM heat exchangers.

- 1 Kg of PCM has a heat storage capacity comparable to 30 Kg of concrete and is fully


- PCM has a heat transfer rate that is 2.5 times higher than that of concrete and can

transfer stored energy extremely rapidly.

- Thermal accumulators can be integrated into existing solutions.

- Correct application of PCM results in reduced power requirements (for cooling and

heating), energy saving and reduction of periodic maintenance.

- PCM is self-regulating with cyclical charging and discharging.

- Autarkis PCM solutions meet the 10,000 cycle ZAE test requirement.

- Application of PCM simplifies and increases the sustainability of the installation concept.

- PCM is fully recyclable and complements a "cradle to cradle" environmental policy.

- Phase change materials fall under the Dutch EIA no. 210405 subsidy scheme.

- Our solutions are 100% Dutch innovations, produced in Holten, the Netherlands.

Interested? Please don't hesitate to contact us for further, obligation-free information.

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