The Aquatics Centre was initially constructed in Olympic Games mode to enable full testing and commissioning of the systems
environment. A series of microclimates has been created within the hall to achieve the right comfort conditions while minimising energy consumption. This microclimate solution also uses temporary systems when the centre is expanded for the Olympic and Paralympics Games. The building was initially constructed
in Olympic Games mode to enable full testing and commissioning of the systems. A temporary screen was then installed to reduce the volume of the space, to minimise energy use while accommodating test events and training. Following the Games, the temporary stands will be removed and new façades installed to complete the legacy building. The heating, cooling and ventilation systems are designed to accommodate these changes in operation, without compromising the permanent installations.
Ventilation Early design options included the use of high velocity jet nozzles, a conventional approach to condition large venues. Modelling analysis showed that, while it was possible to achieve the temperatures required at poolside with this system, there was an inherent instability in the air flow
28 CIBSE Journal July 2012
Architectural grille
Displacement diffuser Builders work plenum
patterns, which gave rise to draughts and ultimately discomfort. There was also risk of interference with other systems in the hall.
Plinth Thus, the chosen solution is a low-
Multi-services dry duct
Volume control damper to diffuser
The low energy pool ventilation system is integrated with the architectural design. Services such as pool water pipework, the movable floors and booms equipment are located within the ventilation ducts to allow accessibility for maintenance
velocity supply system at poolside level relying on natural convection within the hall. As the pool water surface absorbs heat, it draws supply air down, which is then extracted via the pool drainage channels along the pool edge. This also helps keep contaminated air at the pool surface and limits migration to other areas. Four high-performance specialist air handing units (AHUs) supply conditioned air via the pool surround ventilation grilles, and air is extracted through air slots integrated within overflow water channels. The majority of air distribution is within services ducts on each side of the pool tanks. Services such as pool water pipework, the moveable floors and booms equipment are located within the ducts to allow accessibility for maintenance. All four air handling units feature double-pass plate heat exchangers to achieve a heat recovery efficiency of up to 84%. The AHU control adjusts the fresh air ratio into the air system to control the space humidity level.
www.cibsejournal.com
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64