Passive Air-Conditioning with DELTA®-COOL

DELTA®-COOL offers new methods of passive indoor climate control using Phase Changing Materials. In comparison to conventional air conditioning systems, the DELTA®-COOL system is a particularly economical and durable alternative designed to achieve significant energy savings. The product can be flexibly integrated into existing ceiling structures without any major changes to the construction design. At the 2004 Roof + Wall Show in Munich, Dörken unveiled new, futuristic methods of passive indoor climate control with PCMs (phase change materials). PCMs alter their physical state and thus can store large amounts of latent heat. This will assist in keeping buildings cool -the product is particularly effective in lightweight construction. Dörken encapsulates PCMs in several ways, including chained bags made of aluminium composite foil, which can be quickly and economically laid on suspended ceilings or drywall ceilings. The ability of DELTA®-COOL to function as a means of passive climate control has been proven in extensive field tests during the summer of 2003. By using PCMs it is possible to achieve a reduction in temperature of up to 6°C.

Using PCMs for storage of latent heat is extremely economical, as the cost for air conditioning systems (installation and running cost) can be significantly reduced. The lifespan of PCM (over 25 years) withoutany loss of efficiency will by far outlast traditional air conditioning systems. What's more, the DELTA®-COOL system is totally maintenance free. As it does not require connection to the mains, it is highly flexible and can be installed almost anywhere. Integration into existing structures, such as suspended ceilings, is particularly practical, as this doesn't require any changes in appearance and there is no loss space within the room. And if you move, you can simply take the system with you!
Lightweight construction methods without thermal storage elements, architects' attraction towards fully glazed facades and the increasing amount of heat generating equipment in offices has led to work- and living spaces becoming uncomfortably hot, particularly during the summer months. Traditionally, this problem has been controlled by installing an air conditioning system. However, air conditioners have the economic and ecological disadvantage of high-energy consumption. Draughts, dry air and the constant background noise create discomfort.

Passive climate control with a PCM-based solution such as DELTA®-COOL puts an end to these drawbacks. By intermediate storage of energy in the PCMs the range of differing temperatures in the building is curtailed, the amplitude of temperature changes is reduced and the temperature of building surfaces is lowered. Empirical studies have shown that there is a direct link between what people perceive the room temperature to be and the temperature of the surfaces around them.

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