ECO DESIGN ARCHITECTS & CONSULTANTS email: [email protected]web site: www.ecodesignarchitects.co.za ENVIRONMENTAL DESIGN Opportunities for economic, ecological & social regeneration in South Africa Talk By Principle Architect: Andy Horn BAS & B. Arch. UCT, Pr. Arch. (SACAP), MIA, CIA Assessors & Graders Annual Conference TOURISM GRADING COUNCIL OF S.A. 29 th November 2011 Mondazur Resort San Lameer - KZN
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BAS & B. Arch. UCT, Pr. Arch. (SACAP), MIA, CIA Assessors ... · COMPARTMENTS . SOCIO-ECONOMIC Promoting social, economic & cultural upliftment - strengthening local economies - building
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Increases building valuation and ROI Reduced operating costs increases building valuation and provides better ROI
Decreases vacancy and improves retention Better indoor environment reduces absenteeism and improves retention
Reduces liability Improves risk management
ECONOMIC BENEFITS
Dangers of the 3 – D’s: - Distraction - Dissociation - Denial
HEADING TOWARDS AN UNCERTAIN FUTURE??? Resource Depletion, Climate Change, Waste & Pollution, Destruction of Eco Systems & Widening Social Inequalities:
Dissociation from cause & effect………sustainably harvested timber?????
CONVENTIONAL DELIVERY Fails to promote environmental, social, economic & cultural upliftment
Concrete Block/Conventional Materials: • Poor thermal comfort – pollution & health issues • Poor acoustic insulation – social issues • Relies on mass transport – resource & pollution issues • Do not promote job creation at a local level – social & economic issues
Reduce dependence on large dams & protect water sources
WATER The protection, conservation, efficiency and re-use of water
Overloaded Water borne sewage systems
Water wise strategy
The proposed strategy for water usage:
This diagram demonstrates a typical scenario of how water is used in a house. (Reference: National Directorate of Water Conservation - 1999 )
- Understand the needs.
- Install visible metering,
- monitor usage
- check on leaks
WATER EFFICIENT TOILETS Multi – flush devices – 60% saving (by Water Rhapsody) Dual flush toilets – 50% saving
Dry Composting Systems
Anaerobic Methane Digesters / Biogas Digesters
Established International Track Record: – By 2006 India had installed over 1 million – By 2006 China had over 10 million’ – Groot Winterhoek for Cape Nature
Conservation, 16 m³ digester, peak use of 56 people i.e. 65 L / day.
85 House Development Proposal: – R 202 000 excl VAT (2006) – Dome radius: 3.1 meters – Dome height: 1.15 meters – Wetland area: 960m² – Polishing pond area: 144m²
– Relies on stable occupancy/input – Viability in holiday house scenario would be
to be supplemented by council’s conservancy tanks.
Methane bio - digester An example at Stanford Valley Farm Conference Venue
Top of Methane/Bio digester system Reed bed system
Cost: R75 000 (2006)
> 22 litres a minute
8 - 10 litres a minute
R200 - R500 per shower head - “RST” – 9-10 L per minute - “Oxegenics” – 8 litres per minute
Water Efficiency • Tap aerators
– “RST” and “Hippo” Tap aerators to be fitted to any tap of your choice – Fitted aerators allow for up to 50 % saving of tap water – R 30 - R 65 per aerator
Typical aerator by RST
Kitchen swivel nozzle
the diverse range of tap aerators
The images are demonstrating how easily a tap is retrofitted with a RST aerator
Water Efficiency • Washing machines AAA rated Bosch “Eco Plus”
– ± R 3000 incl VAT per machine – Front loader washer uses less water and cost less to
operate – Washer to be connected to the cold and hot water
supply – Hot water to be supplied by solar geysers/evacuated
tubes – Using washer on economic setting saves ± 20% of usual
washing cycle
front loading AAA rated washer
All black and grey water to be plumbed separately: • Definition of black water
– Toilet water – Kitchen water (grease trap is an essential)
• Definition of grey water – Shower & bath water – Wash hand basin water – Laundry water
GREY WATER - System design
Only Biodegradable detergents to be used:
SETTLING TANK SYSTEM FOR CLEANING KITCHEN WATER
BRANCHED DRAIN GREYWATER SYSTEM
MINI WETLAND FOR TREATING GREY WATER
BIOLYTIC GREYWATER FILTER
ON-SITE SEWAGE TREATMENT & WATER REUSE – KLOSTERENGA IN OSLO
Increased volumes of storm water into river courses leads to • Substantial erosion of stream beds and river banks
• Increased pollution
• Flooding
• Drought due to starving of aquifers
RAINWATER AS A RESOURCE
RETENTION PONDS AS RIVERS – Form wildlife corridors – Form artificial water feature. – Water cleaned by using natural
ultra violet light and absorption of nutrients by macrophytes.
– River trails connecting to other open across river
– Firebreak & fire fighting back - up
Example:
Jacana Bay – residential estate in Hartebeespoort Dam servicing 48 stands – Completed 2005
Retention pond
Retention ponds in river system
Conservation - Rainwater Harvesting
Natural Pools - “Hanovia” – oxygenation system - Bio pools – uses natural reed bed system
STORMWATER MANAGEMENT & SEWAGE TREATMENT AS A RESOURCE
Reducing Impacts on Global warming and CO2 emissions
ENERGY
The conservation, efficiency, and renewable use of energy.
SOLAR THERMAL ENERGY EFFICIENCY: - Efficient Shower Heads - Insulate geysers - Insulate pipes - Balanced Pressure - Heat Pumps - 1 kWh elect. power = up to 5 kWh useful energy
RENEWABLES: - Solar Water Heaters a) Flat plate collectors b) Evacuated tubes c) use principle of thermo-siphoning e) split systems vs close coupled
Close coupled systems (geyser visible above panel)
Split system (geyser hidden)
ENERGY The conservation, efficiency, and renewable use of
energy.
ENERGY
The conservation, efficiency, and
renewable use of energy.
ENERGY The conservation, efficiency, and renewable use of
energy.
ENERGY The conservation, efficiency, and renewable use of
energy.
ENERGY The conservation, efficiency & renewable use of energy.
PASSIVE DESIGN FOR THERMAL COMFORT
SIMPLICITY OF DESIGN
Sun Control & Passive Solar Design
Use Natural light
HEALTH Non-polluting environments and healthy materials.
Avoid Plastics
PLASTIC BOTTLES Approx 1,5 million tonnes of plastic is created annually to bottle 89 billion litres of water a year! 2 million plastic beverage bottles are used in the US every 5 minutes!!!
ON-SITE BOTTLED PURIFIED BOTTLED WATER SOLUTIONS :
Persistent Organic Pollutants aldicarb, toxaphene, chlordane heptachlor, chlordimeform, chlorobenzilate, DBCP & DDT the "drins" (aldrin, dieldrin and endrin), EDB, HCH and lindane, paraquat, parathion and methyl parathion, Pentachlorophenol PCP 2,4,5-T.
Synthetic exterior Wood varnish from a choice of approx. 15 000 raw materials.
Natural exterior Wood varnish from a choice of approx. 150 ingredients
noted for their longevity, toxicity to humans and animals, and their ability to be transported around the globe through the atmosphere. The Dirty Dozen (UN Environment Program) • The drins - aldrin, endrin, dieldrin, • DDT, • chlordane, • heptachlor, • hexachlorobenzene, • toxaphene and mirex) • dioxins, • furans • PCBs
Methyl Bromide/Bromomethane is an insecticide often used to “doom fog” old buildings infested with borer beetle. While a proven health hazard and a suspected human carcinogen, it is also an ozone destroying substance.
The US EPA ranks Indoor Air Pollution as one of the “top 5 threats to public health”
Industrialized nations spend up to 90% of their lives indoors.
WHO estimates 30% of new & remodelled buildings have Sick Building Syndrome
Non-Toxic: Timber Preservative Treatment
NON TOXIC PAINTS & FINISHES
HEALTHY BUILDINGS & HEALTHY PLANET:
Eco Friendly Finishes: Natural Plasters
NATURAL PLASTERS – Bokaap, Central Cape Town, 2011
HOLISM Holistic and intrinsically recyclable.
Reusing Rubble in Foundations
Adaptive Reuse
Use of salvaged timber
Preventing Careless Demolition & waste separation
HOLISM Holistic and intrinsically recyclable.
Cyclical vs Linear design Waste is a human construct that is unique to our species!
HOLISM Holistic and intrinsically recyclable.
RECYCLING
Rubble trench foundations
Jobs created on site
Use of concrete minimized by 75%
Building rubble recycled reducing landfill at municipal waste sites
URBANITE WALL SLATE STONE WALL
HOLISM Holistic and intrinsically recyclable.
Recycled building elements
HOLISM Holistic and intrinsically recyclable.
Adaptive Re-use of an old grain silo into student residences – Oslo 2003
HOLISM Holistic and intrinsically recyclable.
Adaptive Re-use of an old power station – The Tate Modern, London
HOUSE IVEY PHILLIPS Hout Bay Cape Town - Use of recycled timbers and locally procured alien timbers
The BACK PACK: Alterations & Additions – Cape Town