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SRT257- BUILDING ENVIRONMENTAL STUDIES
Transcript of SRT257- BUILDING ENVIRONMENTAL STUDIES
1 X 40,000L Underground Water Tank Total Water Stored: 49,000L Reductions Shower: 98L Toilet: 0L Washing Machine: 56L Tap Use: 35L Outdoor Use: 0L 'A & A Worm Farm' toilet- Decomposition of Blackwater as Fertilizer 'Perfectflow Ultimate Shower Head':
7L of Water per minute http://www.savewater.com.au/products/Perfectflow_Ultimate_Showerhead_Model_No_6560 http://www.wormfarm.com.au/ Use of recycled water from laundry, shower and tap usage 'Pacific 2000 Series 6 Star Mixer Tap': http://www.savewater.com.au/products/Pacific_2000_Series_6_Star_Mixing_Taps Aerated tap- 5L of water per minute 5 star- Water reduction by half -88,355L collected Total water collected per year:
0.4873m (rainfall) x 181.317m2 (roof area) = 88.356m3 Water needed for half year storage: 180 (days) x 4 (people) x 49L Water Needed: 35,280L 487.3MM AVERAGE YEARLY RAINFALL: 'Tanket' 40,000L Underground Concrete Tank Diameter: 3350mm Height: 4370mm REDESIGN WATER TANK: Class D lid: Car and truck traffic http://www.tanket.com.au/Gallery/Underground-Water-Tanks.aspx BUILDING PROBLEMS: Over-Glazing Thermal Properties of Cement Sheeting Thermal Properties of Garage Wall ORIGINAL BUILDING COOLING LOAD: ORIGINAL DESIGN The northerly winds for the site are relatively warm ranging from 15 to 25 degrees. These winds would be ideally used for natural ventilation over the warmer months. However when the winds reach a considerably warm temperature and the warm winds become unwanted, the windows should be closed to ensure the warm winds don’t enter the house. REDESIGN ORIGINAL The north westerly winds are cooler than the northerly winds, ranging from 10 to 15 degrees. Like the northerly winds these winds can be used for optimal natural ventilation. North westerly winds are strongest in autumn and spring and should be ideally used as ventilation during these months. REDESIGN ORIGINAL The southerly are considerably cool winds as they would be coming directly from Bass Strait. These winds are strongest during summer which can be used to naturally ventilate and cool the house. REDESIGN REDESIGN N FIRST FLOOR SECOND FLOOR N FIRST FLOOR SECOND FLOOR N FIRST FLOOR SECOND FLOOR N FIRST FLOOR SECOND FLOOR N N FIRST FLOOR SECOND FLOOR FIRST FLOOR SECOND FLOOR N FIRST FLOOR SECOND FLOOR REDESIGN SECTION N REDESIGN SECTION N ESTIMATED WINDOW COSTS - =15.474kW REDESIGN= U-VALUES REDESIGN= GLAZING ORIGINAL REDESIGN REDESIGN= COOLING LOAD =12.197kW ORIGINAL REDESIGN ORIGINAL DESIGN
22nd June @ 11am, 1pm & 3pm As the footprint of the building has not been altered, just mirrored, the external shadows cast by the building have not changed in area. The shadow diagrams of the original design have been calculated using the natural ground level and show the percentage of exterior solar access ranges from 65% to nearly 85% The internal area of the original design that would receive full solar access ranged between 11% and 14%. REDESIGN
Internal Solar Access
22nd June @ 11am, 1pm & 3pm REDESIGN
22nd June @ 11am, 1pm & 3pm ORIGINAL DESIGN
Internal Solar Access
22nd June @ 11am, 1pm & 3pm Due to the increased glazing to the east and reduced glazing to the west the redesign provides an internal solar access range being between 8% and 16% which is an improvement on the original design.
The proposed redesign indicates a positive result in potentially providing a more thermally comfortable living space for the occupants. North -East Elevation
22nd June @ 11am North -East Elevation
22nd June @ 3pm REDESIGN North Elevation
22nd June @ 1pm Taliesen 1.1
Kelly Russell SRT 257 OPPENHEIM ANALYSIS In our redesign rather than reducing the amount of north facing windows we have increased the thermal mass in the heated zone.
This is in the form of an insulated reverse brick veneer wall, which separates the garage from the dining and living areas.
The thermal mass in the redesigned heated zone is now 96.41m² compared to 58.96m² of the original design. While this still falls slightly short of the minimum recommended minimum thermal mass area of 180.12 m² it will assist in significantly reducing the possibility of the area over heating. The Oppenheim assessment method requires the rooms of a building to be grouped into temperature zones.
Zone 1 - Heated Zones
Ground floor: Living, Kitchen and Dining rooms = 58.96m2
First floor:Bridge = 6.0m2
Total = 64.96m2
Sitting room & study area
would normally be nominated as a heated zone but as they do not have any north orientated windows they have not been included in the area for zone 1. REDESIGN
Temperature zones As our redesign has mainly involved just mirroring the floor plan and not changing locations of rooms the zones remain the same. ORIGINAL DESIGN
Temperature zones The section above shows the location of the heated zone with north facing windows. It enables us to visualise the void and bridge areas, The window sizes on this elevation are the same as the original design. We have just increased the amount of openings per glazed area. These areas originally amounted to 64.96m² = 27.74%
The acceptable range for north facing glass in a heated zone ranges between 15% and 25% of the zone floor area.
This calculation indicates the area of glazing to thermal mass is higher than what is acceptable therefore the area would be likely to overheat in summer. W06 W21 W20 D03 W19 W22 W03 W04 REDESIGN
North Elevation REDESIGN
Thermal Mass Summer Maximum Temperature - Comparison Winter Minimum Temperature Average Summer Rainfall Average Winter Rainfall Level of Income level 1= <1000
level 2= 1000-3000
level 3 =>3000 Ownership Level
level 3=>75% Suitability for Rebuilding level 0-3= unsuitable
level 4= Suitable
level 5-9=Highly Suitable Land Use around Rippleside March and November were found to be the two point where the temperature dropped out of the comfort zone Mahoney Table Final Design Suggestions Eaves Calculation Initial Eaves
Calculations Further Eaves Calculations It can be seen through the calculations and the diagram that to eliminate all direct sunlight through the north facing side of the building, the eaves would need to extend further than 2 metres.
This value is quite unrealistic, as the need for extra support beams and the lack of aesthetic quality would also hinder the design. Exploring the current eaves and some of the windows which face north within the building is would be suggested that the eaves are extended or the inclusion of awnings are used. Design Solutions Melbourne Climactic data:
Average temperature. Melbourne Climactic data:
Average humidity. Melbourne Climactic data:
Prevailing winds. Geelong Climactic data:
Average rainfall. Building Fabric Loss Total heat loss and heating load ORIGINAL EMBODIED ENERGY RE-DESIGN EMBODIED