The Impact of FAÇADES on Energy Efficiency of Buildings
U.S. Energy Consumption by Sector. A reorganization of existing data - combining the energy required to run residential, commercial, and industrial buildings along with the embodied energy of industry-produced materials like carpet, tile, and hardware - exposes architecture as the hidden polluter Source : Architecture 2030 architecture is the hidden polluter
What shall we do? DESIGN STRATEGIES TECHNOLOGIES AND SYSTEMS OFF-SITE RENEWABLE ENERGY
Source : UK Energy Efficiency Best Practice Program Energy Consumption Guide 19: Energy Use in Offices ENERGY USE IN OFFICES
Air conditioning load is due to lighting, equipment, people and heat gained through the facade
Sound insulation does not work when the air gap is small, say 6 mm Increase air gap = 20 - 100 mm DGU double glazed unit
Low- Emissivity Glass Type of GlassR Value Single Pane regular glass0.85 Clear Insulated Glass 7/8 inch overall thickness2.08 Hard Coat Low-E insulated glass2.45 Hard Coat Low-E insulated glass with argon2.75 Soft Coat Low-E insulated Glass3.50 Soft Coat Low-E insulated glass with argon4.35
Soft Coat Low-E glass Silver, zinc, or tin are sputtered onto the surface of the glass where they stick. Coating is not strong and easily scratched Hard Coat Low-E glass Molten tin is heat welded to the glass. Coating is very strong and difficult to scratch or remove
NRNC EE CRITERA Points DESIGN EE1 : Minimum EE Performance EE2 : Lighting Zoning EE3 : Electrical Sub-Metering EE4 : Renewable Energy EE5 : Advanced EE Performance 1 3 1 5 15 COMMISSIONING EE6 : Enhanced Commissioning EE7 : Post Occupancy Commissioning 3232 VERIFICATION & MAINTENANCE EE8 : EE Verification EE9 : Sustainable Maintenance 2323
NRNC EE1 : MINIMUM EE PERFORMANCE INTENT Establishing minimum EE performance to reduce energy consumption in buildings, thus reducing carbon dioxide emission to the atmosphere. REQUIREMENT Points Meet MS 1525:2007 specifications : OTTV ≤ 50 W/m 2 RTTV ≤ 25 W/m 2 AND Provision of EMS where air-conditioned space ≥ 4,000m 2 1
NRNC EE5 : ADVANCED EE PERFORMANCE INTENT Exceed EE performance and achieve Building Energy Intensity ≤150 kWh/m 2 yr REQUIREMENT Points Achieve BEI ≤ 150 kWh/m 2 yr Achieve BEI ≤ 140 kWh/m 2 yr Achieve BEI ≤ 130 kWh/m 2 yr Achieve BEI ≤ 120 kWh/m 2 yr Achieve BEI ≤ 110 kWh/m 2 yr Achieve BEI ≤ 100 kWh/m 2 yr Achieve BEI ≤ 90 kWh/m 2 yr Values above are for Office buildings only 2 3 5 8 10 12 15
NRNC EE5 : ADVANCED EE PERFORMANCE BEI of office buildings in Malaysia Source : PTM
What's on the Horizon? Source : Reliant Energy Retail Holdings LLC Using refractive and reflective optics allows direct daylight to be distributed deeper into a building's core.
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