South Atrium Water Features
Standing an imposing 6 storeys in height, the primary purpose of the mylar ribbon water features located in the building’s south atria is to humidify or dehumidify incoming air before it is distributed through the raised access floor plenums. These water features can also be appreciated as a striking 24m tall kinetic sculpture.
Each strand in the feature is an individual 4mm wide ribbon of mylar, held in tension at the bottom by an individual bronze weight. Small threaded valves at the top of each ribbon are carefully adjusted to control the flow of water down each ribbon. The aggregate surface area provided by the ribbons, (measuring approximately 53 square meters) allows for a maximum amount of air flow through and around the water feature.
During warmer, moist weather, water running down the water feature is cooled by a heat exchanger tied to the building’s geothermal system. Moisture in the humid air condenses against the cool ribbons and the latent moisture in the air is absorbed into the water feature system. In the winter, the process is reversed. Water running down the ribbons is heated and, the moisture is dispersed into the cool, dry incoming air. Water temperature at the heat exchanger interface is regulated by the building management system based on the relative humidity inside the office space.
Water is recirculated through the closed system, with water make-up and overflow provided dependant on the season. Circualting through a single hi-efficiency pump, water is cleaned via a reverse osmosis filtration system to remove particulate, and UV treatment controls bacteria. Water softeners remove minerals from the water to eliminate scale build-up on the ribbon faces.
Each feature consists of 280 individual mylar ribbons, and placed end to end, the ribbons would extend over 23km. All water features in the building were developed and designed by Dan Euser Water Architecture, based in Richmond Hill, Ontario.
Related Performance Goals:
Energy Performance-Sustainable Design
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