Ventilation Systems - Awadukt - Commercial Systems

REHAU AWADUKT THERMO

GROUND TO AIR HEAT EXCHANGER

The ground-air heat exchanger AWADUKT Thermo exploits the energy stored in the ground. At a depth of 1.5 m the ground is a constant 8-12°C. By drawing air through an underground network or pipes, it provides a source of heating in the winter and cooling in the summer.

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REHAU Thermo pipe has an anti-microbial pipe inner layer. In combination with heat recovery devices, it is possible to can save not only money and energy with the free zero carbon energy, but also improve the air quality in their building significantly. 

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BENEFITS

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• Reduction of heating costs by pre-heating air in winter
• COP rating of
• Pleasant cooling effect in summer, reduces need for air-conditioning
• Improvement of the air quality in the building through dust and pollen filters
• No build up of microbes inside the pipe system due to silver pipe lining
• Improved heat conductivity of pipes to ensure optimal heat transfer 
• Individual designs checked with REHAU software, factoring location, soil and use.
• Infinite pipe layouts available.
• Radon proof joints

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COMMERCIAL LAYOUTS

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It is usual to use a Tichelmann layout. This is a self balancing system, balancing the pressure losses. Usually DN200-250mm pipe is used for heat transfer with DN500-1200mm pipe is used as distributor headers. The required air flow dictates the optimum pipe diameters.

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CASE STUDY – TESCO

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• Pipes laid under floor slab to reduce excavation costs.
• 700m of DN200mm Awadukt Thermo pipe, DN500mm distribution pipe.
• Airflow 2,700 m3/h.
• Heat transfer summer 37oC to 19oC, winter -15oC to 7oC.
• Cooefficent of performance of 20 (COP 20).

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send drawings to technical@thegreenbuildingsite.co.uk for an initial design appraisal or quotation.