How it works - Phase Change Material (PCM) At the heart of the system is the PCM, a micro-encapsulated wax held within a robust polymer shell.  As the wax core changes state from solid to liquid and vice-versa, the wax stores and releases thermal energy. However, due to the nature of the PCM, the thermal storage capacity far exceeds that of materials of a similar volume. To put it into context, a 1cm thick layer of PCM will have the same thermal mass as a 15cm layer of concrete. Each PCM capsule is roughly 2 – 5 microns in diameter, and is suspended in an aqueous solution (PCM slurry). When required, the slurry can be pumped to and from the insulated tank through the heat exchangers. Unlike AC, the COOL-PHASE® passive ventilation system is not designed to maintain a specific temperature, but rather air quality within a designated temperature range. When in its automatic control strategy, COOL-PHASE will seek to maintain a comfortable temperature range. Dependant on the operating conditions, the COOL-PHASE system will try to increase or decrease the temperature of the air. However, the integrated CO₂ sensor will always override the temperature control if the level exceeds 1200ppm, allowing for the ingress of fresh air. ©2010Monodraught Ltd Terms | Privacy | Copyright | Contact