EDITT Tower.pdf - Alive2green

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Vegetation placements within the tower at different heights respond to the microclimates of each individual sub-zone at the tower. • Water-Recycling Water self-sufficiency (by rainwater-collection and grey-water reuse) in the tower is at 55.1%: • Total gross area = 6,032 sq.m. • Water requirements = 20 gallons/day/10 sq.m. gross area + 10% wastage • Total requirements = (6,032 ÷ 10 x 110%) x 20 gallons = 13,270 per gallon/day = 60.3 m3 per day x 365 days = 22,019 m3 annum • Total rain-fall catchment area = 518 sq.m. • Singapore average rainfall / annum = 23.439m • Total rain-water collection = 12,141 m3 per annum • Water self sufficiency = 12,141 ÷ 22,019 x 100 = 55.1% • Water-Purification Rainwater-collection system comprises of ‘roof-catchment-pan’ and layers of ‘scallops’ located at the building’s facade to catch rain-water running off its sides. Water flows through gravity-fed waterpurification system, using soil-bed filters. The filtered-water accumulates in a basement storage-tank, and is pumped to the upper-level storage-tank for reuse (e.g. for plant-irrigation and toilet-flushing). Mains water is only here for potable needs. • Sewage Recycling The design optimises recovery and recycling of sewage waste: • Estimated sludge = 230/P.E. / day @ 3. P.E. per 100 m2 GFA. • Building GFA = 6,032 sq.m. • Sewage sludge collected/day = 230 litres x 6,032 ÷ 100 x 3 = 41,620.8 litres or 41.62 m3/day = 15,190 m3/ annum Sewage is treated to create compost (fertilizer for use elsewhere) or bio-gas fuel. • Solar Energy Use Photovoltaics are used for greater energy self-sufficiency. • Average photovoltaic-cell energy output = c. 0.17 kWh sq.m. • Total sunlight hours per day = 12 hours • Daily energy output = 0.17 x 12 =2.04 kWh sq.m. • Area of photovoltaic = 855.25 sq.m. Total daily energy output = 1,744 kWh • Estimated energy consumption @ 0.097 kWh /sq.m. enclosed & 0.038 kWh/sq.m. unenclosed = (0.097 x 3,567 sq.m.) + (0.038 x 2,465 sq.m.) = 439.7 kWh • Estimated daily energy consumption = 10 hrs x 439.7 = 4,397 kWh • % self sufficiency is 1,744 ÷ 4,397 = 39.7% • Building Materials Recycling and Reuse Design has an in-built waste-management system. Recycleable materials are separated at source by hoppers at every floor. These drop-down to the basement waste-separators, then taken elsewhere by recycling garbage collection for recycling. Expected recycleable waste collected /annum: • paper / cardboard = 41.5 metric-tonnes
• glass / ceramic = 7.0 metric-tonnes • metal = 10.4 metric-tonnes The building is designed to have mechanically-joined connections of materials and its structural connections to facilitate future reuse and recycling at the end of building’s useful-life. • Natural Ventilation & “Mixed-Mode” Servicing The options for the M&E servicing modes for any ecological building are: • passive mode • background (mixed) mode • full (specialised) mode The design here optimises on the locality’s bioclimatic responses using ‘mixed mode” M&E servicing. Mechanical air-conditioning and artificial-lighting systems are reduced. Ceiling-fans with de-misters are used for low-energy comfort-cooling. Wind is used to create internal conditions of comfort by “wind-walls” that a placed parallel to the prevailing wind to direct wind to internal spaces and skycourts for comfort cooling. • Embodied Energy and CO2 Embodied-energy studies of the building are useful to indicate the building’s environmental impacts. Subsequently, estimates of CO2 emissions arising from building materials production may be made. Design’s embodied-energy (prepared by our expert) is: Element GJ/sq.m. GFA Structural System • Excavation • Steel and concrete • Formwork 764.0 43,850.2 3,113.10 Floor • Steel • Timber & other material • Staircases & railings • Floor finishes 13,013.10 22,648.00 1,752.50 7,793.00 External wall • Curtain wall and bricks • Aluminium cladding • Solar panels 5,550.30 2,864.50 12,435.70 External wall and partitions • Bricks • Other materials 5,482.20
Page 1 and 2: EDITT Tower Volume: 3 Issue 9 | Sat
Page 3: inorganicness of this urban site. T

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