AIRCON,AIR MOVEMENT & VENTILATION 1 STORAGE
CHANGE M
A thermal energy storage system is claimed to be an energy efficient alternative to air conditioning. Andrew Brister takes a look at this CIBSE award- winning product
onodraught’s Cool-Phase technology is a thermal energy storage system that uses phase change material
(PCM), in combination with controlled ventilation, to ventilate and cool buildings as an alternative to air conditioning. Monodraught claims that the system – which was the Energy-using Product of the Year in the CIBSE Building Performance Awards 2102 – can reduce energy consumption by up to 90% compared with conventional cooling systems. At the heart of Cool-Phase are what the
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company calls ‘thermal batteries’ that store energy when it is freely available and release it when it is needed. The thermal battery uses the latent heat property of PCMs to store energy as they change phase from solid to liquid. The main material inside the Cool-Phase system is a combination of water and a number of salts. The resulting material is non-toxic, non-flammable, and changes from liquid to solid at room temperature. Monodraught estimates that 1kg of this material stores the same amount of energy as it takes to heat up 200kg of concrete by one degree.
May 2012 CIBSE Journal 45
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