Low Energy Building Design 2010

Low Energy Building Design 2010Presentation 2TEAM ZEROArnaud GibertBintou OuedraogoDanny TangNaeema HafeezPaul Dupuy

AimIs to design 3 housing types which will form a 20 dwelling net zero carbon community, located in rural Ayrshire

Designed to Code Level 5 or better

To be an exemplar of sustainable, low energy design for the future developmentsTasks

Passive House StandardExterior shell insulated to achieve a u-value not exceeding 0.15W/m2U-value between 0.11-0.15 W/m2Making full use of solar energySouthern orientation and shade considerationsEnergy Efficient window glazing and framesU-value should not exceed 0.80W/m2 for both the glazing and frame of windowTotal energy demand for space heating and cooling should be less than 15kWh/m2/yr Study of MaterialsStructural Frame of BuildingSteelHigh in embodied energyRarely ever used in construction of homesOmitted from selectionConcreteHigh in embodied energy Heavyweight materialUsed mainly for larger buildingsShould be avoidedTimber-final choiceLow in embodied energyCan be locally sourced from siteEnergy efficient material

Study of MaterialsInsulation materialsRecycled newspaperHempStraw BalesSheeps woolIn the end it was decided that insulation will not be required because the material we are using are straw bales and therefore act as a load bearing wall and provide insulationWallsTimber claddingThermoPlan Ziegel BlocksExcellent thermal performanceFinished construction airtightLow wastageVery low in embodied energy- However, they have to be transported from Germany- increase the embodied energy of the materialRammed Earth

Straw Bales-Final choice450mm thick can be 300mmVery Low in embodied energy- 0.24MJ/kg (University of Bath)Low u-value 0.13W/m2Very high level of insulation Windows and FrameTriple-glazing windows with Timber frameImproved energy efficiencyExterior noise reducedU-value for triple glazing is 2.0W/m2U-value for triple-glazing with multiple low emissivity coatings and Xenon filled = 0.4W/m2

2 Bedroom Design

3 Bedroom Design

4 Bedroom Design

Energy DemandsPassive house standards : Space heating : 15 kWh/m/yearHot water : 9 kWh/m/yearAppliances : 16 kWh/m/yearVentilation : 2 kWh/m/yearTotal habitable surface : 2640 mTotal thermal requirements : 9.7 kW (average)Total electrical requirements : 7 kW (average)

SolarSurface available : 524 m for the community.Power density : 152 W/m

ThermalSchuco Sol Premium lineThermal output : 2kWSurface : 2.69 mTotal surface for the community : 60 mUsing power density for calculationTotal output (Community): 10kWPhotovoltaicSolar century C21eElectrical output : 143 W/mModule efficiency : 14.9 %Surface for the community :450 mUsing power density for calculationTotal output : 10kW

CHPYanmar : CP10VB1Electrical output : 9.9 kWThermal output : 16.8 kW

Ventilation Ventilation system:Mechanical Ventilation mixed with passive natural ventilationDisplacement ventilationHeat recovery systemHeat loss 7kWh/m2 per yearVentilationVentilation requirement:Excellent outdoor air quality -> 0 decipolIndoor air quality B (20% PD) -> 1.4 decipolPollution level from materials 0.1 olf/m2Pollution from occupant 1olf/persExpected ventilation effectiveness 1.5Required Ventilation10 x Pollution load/(( Indoor AQ Outdoor AQ)x effectiveness)-> 0.67 l/s per m2 or 78l/s, 84 l/s and 112l/s for the 3 houses

VentilationVentilation- Energy consumption:120W for the 2 Bedrooms , 150W for the 3 and 200W for the 412h/ days, 250 days per year

-> 360kWh/year for the 2 bedrooms house-> 450kWh/year for the 3 bedrooms house-> 600kWh/year for the 4 bedrooms house

LightingLighting Requirement:Kitchen, Bedrooms, Study, Bathroom 300 luxLiving room, Dinning Room 200 luxCorridors 100 luxRequired lighting = Required illuminance x Area / lamp lumen output x utilization factor

LightingLighting System:Natural LightingWindows on the southSolar tubes on the north Luminaries for the night or cloudy days Fluorescent LampCompact

LightingLighting- Energy Consumption:350W for the 2 bedrooms420W for the 3 bedrooms500W for the 4 bedrooms10h/days in winter8h/days in spring and autumn6h/days in summer-> 650kWh/year for the 2 bedrooms house-> 850kWh/year for the 3 bedrooms house-> 1,000kWh/year for the 4 bedrooms house

WaterWater requirement:100l/day per personWater systemGrey water recycling system

TransportationAlternative for carsCycling, rollerblading and walkingPublic TransportsBus stop

Electric CarsAdvantages:Price of electricityLittle noiseSolar ParkingSolar Panel

Electric Ca23TransportationBlue CarBats cap Lithium Metal polymer batteryLife span 10 yearsEntirely recyclableRecharging time: 4 hours Average autonomy: 25o km

Plan of WorkUse ESP-r modelMore details drawingsModel ventilation and Lighting in more detailHomer Calculate embodied energy of materialsCostTransportation- more detail

Any Questions??