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[16469] Low Energy Building Design

[16469] Low Energy Building Design. Critique 4. Adam Boney , Fraser Cassels , Marc Breslin , Nicolas Burns. Our Design. 1 st Floor. Life Cycle Analysis. There are 6 main processes involved in the LCA. Raw Material extraction Manufacturing of materials Transportation Material Use

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[16469] Low Energy Building Design

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  1. [16469] Low Energy Building Design Critique 4 Adam Boney, Fraser Cassels, Marc Breslin, Nicolas Burns

  2. Our Design 1st Floor

  3. Life Cycle Analysis • There are 6 main processes involved in the LCA • Raw Material extraction • Manufacturing of materials • Transportation • Material Use • Maintenance • Disposal/recycling • Inputs: • Material input • Water use • Energy use • Outputs: • Products • Carbon emissions • Emissions to rain, land

  4. Life Cycle Analysis • Cradle to gate Sourced from inventory of carbon and energy and greenspec website

  5. Life Cycle Analysis • Tables show the fuel used during cradle to gate process for materials: Glass Concrete Sawn Timber

  6. Material cost • Glazing 28m2 – £250 per m2 = £7000 • Doors 6m2 – £320 per m2 = £1920 • Timber cladding - 250m2 - £35 per m2 = £8750 • Timber Battens – 500 battens - £7 = £3500 • Slates for roof – 132m2 - £ 18 per m2 = £2376 • Sheep’s wool insulation – 375m2 - £55 per 6m2 = £3437 • Cellulose insulation – 375m2 - £11 per 8Kg bag = £4432 Approximate costing

  7. Ventilation • Fabric Heat Loss = Area (m²) x U-value (W/ m²K) x ΔTemperature

  8. Ventilation • Ventilation Heat loss PV = CV x N x ΔT 3600

  9. Appliances Weekday total = 19.455kWh Weekend total = 20.913kWh

  10. Heat Pump • Is required to heat the water for the house • And it is also used to heat the house when the MVHR systems can’t

  11. Gains • Solar: 4881.338 kWh/yr • Passive: 6499.92 kWh/yr

  12. Gains - Losses

  13. Adding the values calculated in the Gain – Loss column to the heat pump • Total Demand require from the Turbine • Heat pump = 6189.46 kWh/yr • Appliances = 7101.06 kWh/yr • Total = 13440.65 kWh/yr

  14. Energy Savings - Appliances Total appliance demand = [(5x7254.19)+(2x2195.903)]x52= 211,446kWh/year – Low Energy Total appliance demand = [(5x8844.39)+(2x2895.692)]x52= 2,600,693kWh/year – Average House Energy SavingAppliances = 2,389,247kWh/year

  15. Energy Savings – Water heating Average house: Water heating = 6210kWh/yr Energy saving waterheating= 6210 – 3688.431 = 2521.6kWh/yr

  16. Recalculated total demand data: Total dwelling demand- 13440.65Kwh

  17. Turbine Power calculation: • P=ρAV³xCp http://www.raeng.org.uk Nb=0.97 Ng=0.36 MechanicalEfficiency Coefficients. Cp=0.47

  18. Turbine options:

  19. Turbine selection: • Having revised the potential total annual demand for our building we can select a more suitable size of turbine to meet the demand. • We have opted for : - Proven 35-2 - 8.5m rotor diameter - Producing 23794.96Kwh/year (taken from www.provenenergy.co.uk)

  20. Turbine energy production per month: As you can see each for each month the selected turbine is meeting the demand except for July where there is a shortfall.

  21. Electricity storage: • Opted for batteries as a clean renewable energy source. • Chose deep cycle renewable batteries as they are long-lasting, clean most importantly reliable. • For the Month of July there is an energy deficit of 18.46Kwh • To counter this we will use an off grid remote residential Trojan deep battery.

  22. Electricity storage: There are a variety of Trojan batteries to choose from, opting for a 12v battery from possible deep cycle options below- (http://www.trojanbatteryre.com/PDF/datasheets/24TMX_Trojan_Data_Sheets.pdf)

  23. Electricity storage:

  24. Final Thoughts • Energy demands met by turbines • House is an autonomous, zero-carbon dwelling • In theory building meets requirements set out in brief

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