Natural Cooling and Ventilation through Diffuse Ceiling supply and thermally activated building
The project aim is to develop a new system solution for naturally cooling and ventilation of office buildings. The solution has potential to eliminate the electricity need for airtransportation and optimize the utilization of naturally airs night cooling potential in the summer months, and utilize the buildings thermally mass without compromises with the acoustics.
The project aim is to develop a new system solution for naturally cooling and ventilation of office buildings. The project will use already existing knowledge and develop a system solution that combines naturally ventilation with diffuse ceiling supply and utilize concrete decks thermally characteristics and can deliver both ventilation and cooling to the office building throughout the year. Mechanical ventilation and cooling with atmospheric air deliver the requisite cooling but the avoid draught the atmospheric air must be heated during the winterperiod either by heat recovery or directly heating which reduces the atmospheric airs cooling output appreciable. The volume of the ventialtion air is therefore 5-10 times bigger than necessary which results in both a higher electricity consumption to transport the air and the fixed asset investment. Aalborg University has developed a solution for diffuse ceiling supply through suspended ceilings that makes it possible to blow in very cold air in rooms without causing draught problems. The solution has a very low drop of pressure, that makes it possible to combine this with naturally ventilation. Aalborg University has also in previous projects developed solutions to increase the utilization of concrete thermally masses. The solution has potential to eliminate the electricity need for airtransportation and optimize the utilization of atmospheric airs night cooling potential in the summer months, and utilize the buildings thermally mass without compromises with the acoustics.
A new system solution for natural cooling and ventilation of low energy office buildings has been developed. The solution can efficiently provide ventilation and cooling both in the winter period, where cold outdoor air can be used directly to cool down office spaces without creating draught, as well as in the summer period, where natura! night cooling and thermal mass activation either passively or actively provides the cooling need.
The solution eliminates the need for electricity for air transport, ootimizes the whole vear cooling potential of outdoor air and utilizes the building thermal mass effectively without sacrificing the acoustic performance of the building.
The project has included both theoretical analysis of application areas and expected performance and well as documentation of energy and indoor environmental performance through full scale experimental lab studies.
The project results include development of system solutions and recommendations on their application areas and energy saving potential, determination of ventilation and cooling capacity and of the influence of key design parameters on system performance. The results are summarized in a design guide for diffuse ceiling ventilation.
Key figures
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Participants
| Partner | Subsidy | Auto financing |
|---|---|---|
| Consolis Spæncom A/S | ||
| WINDOWMASTER A/S | ||
| TROLDTEKT A/S |
