Site Location: Site Location: Gap Site at Bath Street and Pitt Street Plot: Plot: 50m x 50m Building Area: Building Area: 4000m 2 maximum Building Height:

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Presentation transcript:

Site Location: Site Location: Gap Site at Bath Street and Pitt Street Plot: Plot: 50m x 50m Building Area: Building Area: 4000m 2 maximum Building Height: Building Height: 25m maximum Occupancy: Occupancy: 400 People maximum Office Requirement: › General Office Purpose › 70% Open Plan and 30% Cellular Full Disabled Access Materials and Energy should be produced locally

High levels of insulation  Walls < 0.15 W/m 2 K 'Thermal bridge free' construction Airtight building fabric  Maximum of 0.6 air changes per hour at 50 Pa High performance windows with insulated frames  Glazing < 0.8 W/m 2 K Space Heating/Cooling Energy  <15kWh/m 2 /annum Primary Energy Demand  <120kWh/m 2 /annum

-Dimensions : 28x28m -Glazed surface oriented South East -Atrium in order to bring maximum light inside the building -Shading in order to avoid over illumination and overheating

N

Air Supplied Air extracted Ground Heat Exchanger Mechanical Ventilation Heat Recovery (MVHR) : -Maximum flow rate : m 3 /hour -Air change per hour per person : from 8 to 30 l/s/person -Fan consumption : 2W/l/s

Ceiling Smart LED : 43W 36 fittings in the open area 2 fittings in the each cellular office Occupancy sensors for cellular and toilets

300 lux on the working plan Variable intensity depending on the incoming light thanks to daylight sensors

To heat => hot water, to cool => cold water More cost effective and energy efficient than air conditioning

Total annual electricity demand = kWh 50% demand to be met by renewables = kWh

Rooftop PV flat 432.6m2 11.8% efficiency = 44395kWh Overhang PV flat 132m2 11.8% efficiency = 6433kWh (30% Shaded) Overhang PV vertical 132m2 11.8% efficiency = 9482kWh (30% Shaded) Rooftop PVT system flat 104.4m2 13% efficiency =11785kWh Increased efficiency as thermal system reduces operating temperature Total electricity generated = 72096kWh

Hot water demand 3150litres/day PVT thermal efficiency = 0.7 Absorption 85% as PV rather than glass 100 litres per panel 45 panels required Panel area 2.32m2 Total system size 104.4m2 Additional hot water heating required during winter months kWh 0.29kWh/m2/a Electrical emersion heater

WallsGround Floor SlabRoofGlazing Materials LCC GGBS Insitu Concrete Frame British Gypsum® Plaster Low Conductivity Teplo4 ™ Wall Ties SVP Insulation ECO Smart™ Sandstone Cladding LCC GGBS Insitu Concrete Slab Kingspan® Therma floor™ TF70 Insulation Damp Proof Membrane (Waterproofing) LCC GGBS Insitu Concrete Slab Kingspan® Therma roof™ TR26 LPC/FM Insulation Damp Proof Membrane (Waterproofing) Gypsum Plaster Atrium: A98 Atrium Glazing Units Office: Low Emissivity Triple Glazing Fully Insulated Frame Passive Standard U-Value Achieved (W/m 2 K)

Typical PracticeBest PracticePassive StandardOur Office Overall Energy (kWh/m 2 /annum) Cooling & Heating (kWh/m 2 /annum) Lighting (kWh/m 2 /annum) Office Equipment (kWh/m 2 /annum)

Our OfficeEnergon Passive Office Overall Energy Cooling & Heating U-Value (W/m 2 K) Ground Floor Slab Roof Glass Roof Atrium Typical Office Windows Wall Construction GF, 0.13 Office

Size increased from 25m x 25m to 28m x 28m -increase atrium size and allow more natural light to enter Pitch of roof – changed from angled to flat pitch was not feasible by exceeding the maximum height not enough light entering the atrium Overhangs designed to create shading Solar gains and low u-values of materials creating internal overheating PV installed on to overhangs Electrical demand exceeded 50% onsite generated requirement Change Ventilation Flow Rate Cooling was not sufficient so ac/h increased

Apply what was learned in the first semester How to use new software (i.e. Dialux, Dreamweaver, etc) How to present our ideas Work as a team

All details available on the website:  Project detailed per section  Presentations and calculations downloadable  Pictures  …

Area of Glazing = 660m 2 Transmittance = 0.57 South facing vertical Total Solar Heat Gain = kWh January February March AprilMayJune July August September October November December

Green Building Store energy-efficient-glazing.html External shading overhangs/louvres Light shelf