[16469] Low Energy Building Design critique 1 Adam Boney, Fraser Cassels, Marc Breslin and Nick Burns

Location

Case studies Considered a number of similar projects Focused on layout, technologies and locations Found there is no set, prescribed approach

Case studies Kingspan Lighthouse, Watford Zero carbon house – ‘Light on the world’s resources’ 40° mono-pitch roof accommodating solar PV panels Passive ventilation and cooling with wind catcher Grey water recycling Low energy LED lighting

Case studies Passivhaus project, Galway Timber frame construction, 235m2 Balanced ventilation system with heat recovery Large amounts of rock wool insulation Water-saving WCs

Case studies Batavia, Unst Zero carbon, detached house Timber frame construction 2 micro wind turbines Air-to-water heat pump Strong links with local, national and international organisations

Climate Consistent levels of strong wind all year round Variable sunshine levels – low amount in winter, higher in the summer Source: http://www.shetland.gov.uk/documents/SinStatsBinder1.pdf

Energy usage Average four bedroom house consumes approx. 29,000kWh of gas and 6,000kWh of electricity Energy use: Heating: 61% Hot water: 23% Lighting/electrical: 13% Cooking: 3%

Technology Wind technologies: Cost: £ 500-£1,200 Size: Range from a few watts to a few hundred watts. Output: 700kWh-2,500kWh depending upon wind speed. Payback period: 4-5years. Small micro wind turbine

Technology Cost: £4,000 -£10,000 Size: Few hundred watts to a few hundred kilowatts. Output: 50,000kWh-800,000kWh depending on wind speed. Payback period: 5-6years. Stand-alone wind turbine

Technology Average site wind speed in m/s From our climate investigation it is apparent that the average wind speed for the location is in the region of 7 m/s. Average site wind speed in m/s Yearly output in kWh for turbines rated at:   4 5 6 7 8 600W 794 1354 1948 2504 2969 2.5kW 2473 4282 6333 8404 10251 6kW 6765 11622 16900 21944 26216 15kW 16912 29045 42250 54860 65541 80kW 51980 122560 175200 210240 245280 250kW 141229 383000 547500 657000 766500 Our site will install a 2.5kW wind turbine to satisfy the electrical needs of the building

Technology From electricity generated via wind power: Ground-source heat pump HVAC Direct heating system

Additional Technology PV cells Rainwater harvesting Clean source Effective in summer Low maintenance Generation 180KWh per square metre Collected water can be used for: Drainage Washing (post antibacterial treatment) Drinking (post mineralization)

Possible Technologies Sprung floor

Possible layouts Based on initial thoughts and findings… Materials Orientation Size

Possible layouts