http://www.engineeringnews.co.za
  SEARCH
Login
R/€ = 14.49Change: 0.10
R/$ = 10.50Change: 0.05
Au 1294.90 $/ozChange: -0.67
Pt 1407.50 $/ozChange: -21.00
 
 
Note: Search is limited to the most recent 250 articles. Set date range to access earlier articles.
Where? With... When?








Start
 
End
 
 
And must exclude these words...
Close Main Search
Close Main Login
My Profile News Alerts Newsletters Logout Close Main Profile
 
Nelson Mandela 1918 - 2013   Agriculture   Automotive   Chemicals   Competition Policy   Construction   Defence   Economy   Electricity   Energy   Environment   ICT   Metals   Mining   Science & Technology   Services   Trade   Transport & Logistics   Water  
What's On Press Office Suppliers Directory Research Jobs Announcements Contact Us
 
 
 
RSS Feed
Article   Comments   Other News   Research   Magazine  
 
 
Aug 10, 2012

Climatic understanding key to informing green design

Back
Pretoria|South Africa|Energy Efficient Buildings|Green Building|Rainwater Harvesting Systems|Simulation Software|Dirk Conradie|Radiation|Simulation
pretoria|south-africa|energy-efficient-buildings|green-building-industry-term|rainwater-harvesting-systems|simulation-software|dirk-conradie|radiation-technology|simulation
© Reuse this



A thorough understanding of domestic climatic conditions and a detailed set of quantified climatic data are essential prerequisites for the development of suitable passive design strategies in construction and the subsequent performance analysis.

Council for Scientific and Industrial Research (CSIR) built environment senior researcher Dr Dirk Conradie asserts that wide-scale research on local weather patterns has confirmed that South Africa’s position as a water-stressed region will worsen in the near future, and will dictate the need for water- saving techniques to be included in contemporary building design.

“Climate-change patterns suggest that water will become far scarcer, and the result is that designers will have to seriously consider the incorporation of rainwater harvesting systems and the use of permeable surfaces in reducing runoff and ensuring that underground sources are replenished,” he maintains.

In the CSIR’s Green Building Handbook, Conradie states that sun protection measures should also be considered in areas such as Pretoria, which have high-quality sunshine and solar radiation as well as a mild climate.

These conditions present opportunities for the exploitation of the sun in the design of energy efficient buildings using a combination of accumulated knowledge and modern simulation software.

“Architects are aware of sun protection measures, but in many cases are informed by fashion rather than reason, which is often observed in their infatuation with the overglazing of windows. This could lead to both overheating in summer and under-cooling in winter,” Conradie explains.

He adds that designers can go much further by incorporating thermal mass, insulation, ventilation and solar penetration considerations into the design phase of building projects.

Advanced software products make it far easier to qualify and quantify the effect of a particular building design prior to construction and Conradie advocates that this may lead to a far greater understanding of the basic principles of environmentally conscious, energy efficient architecture.

One such method is the use of a bioclimatic chart to define potential building designs that employ natural energy resources and minimise conventional energy use.

While South African building legislation SANS 204-2 does currently recognise six major climatic regions in the country, in an attempt to introduce a quantified view of climate into the national building standards, Conradie warns that this is a coarse oversimplification of existing conditions.

“If this classification is compared with more detailed research work, it becomes clear that a greater degree of refinement is required to support designs within the built environment,” he claims.

The standard provides solar exposure factors as well as coefficients of various overhang and height factors for each of the six identified climatic zones. It is used most often for initial calculations, but should be quantified with more detailed calculations using simulation software.

He warns that indications point to a substantial degree of climate change in South Africa, which will have a profound impact on both the existing built environment and the manner in which future buildings will be designed.

Edited by: Martin Zhuwakinyu
© Reuse this Comment Guidelines
 
 
 
 
 
 
 
 
Other News This Week News
The Electronic Systems Laboratory (ESL) of the Department of Electrical and Electronic Engineering at Stellenbosch University is strongly reaffirming its position as one of South Africa’s leading centres for satellite technology and expertise. It is currently...
MORE IN SA Phase 2 should see local content on the mainline locomotive increase from 65% to 80% by the end of 2014
The world’s lowest-cost diesel-electric locomotive is not made in China, but in Pretoria, at RRL Grindrod Locomotives’ newly upgraded 30 000 m2 plant. The company’s locomotive pricing is “more competitive than any other original-equipment manufacturer (OEM)...
The South African Defence Review 2012, released to the public at the end of last month (despite the year given in its title) recommends the creation of the post of Chief Defence Scientist. This official would be responsible for the management of defence technology...
More
 
 
Latest News
Few would argue with the notion that unemployment, which stands at around 25% on the narrow definition as reported by Statistics South Africa, remains one of the country’s most pressing challenges. Fewer still could contest the view that South Africa’s education...
Renewable-energy projects, such as this Northern Cape solar farm, seen as key to low‐carbon energy supply.
Upfront investment costs will and should remain a critical consideration as South Africa moves to upscale and accelerate its infrastructure programmes. But one of the lead authors of the latest Intergovernmental Panel on Climate Change (IPCC) argues that the...
The barrier to efficient water service delivery in South Africa was not of a technological nature but rather related to legal and Constitutional challenges, Water Research Commission (WRC) CEO Dhesigen Naidoo said on Thursday. Opening a WRC debate under the theme...
More
 
 
Recent Research Reports
Steel 2014: A review of South Africa's steel sector (PDF Report)
Creamer Media’s Steel 2014 report provides an overview of the global steel industry and particularly of South Africa’s steel sector over the past year, including details of production and consumption, as well as the country's primary carbon steel and stainless...
Projects in Progress 2014 - First Edition (PDF Report)
This publication contains insight into progress at the delayed Medupi and Kusile coal-fired projects, in Mpumalanga and Limpopo respectively, as well as at the Ingula pumped-storage scheme, which is under construction on the border between the Free State and...
Automotive 2014: A review of South Africa's automotive sector (PDF Report)
The report provides insight into the business environment, the key participants in the sector, local construction demand, geographic diversification, competition within the sector, corporate activity, skills, safety, environmental considerations and the challenges...
Construction 2014: A review of South Africa's construction sector (PDF Report)
Construction data released during 2013 hints at a halt to the decline in the industry during the last few years, with some commentators averring that the industry could be poised for recovery. However, others have urged caution, noting that the prospects for a...
Electricity 2014: A Review of South Africa's Electricity Sector (PDF Report)
This report provides an overview of the state of electricity generation and transmission in South Africa and examines electricity planning, investment in generation capacity, electricity tariffs, the role of independent power producers and demand-focused initiatives,...
Defence 2013: A review of South Africa's defence industry (PDF Report)
Creamer Media’s 2013 Defence Report examines South Africa’s defence industry, with particular focus on the key players in the sector, the innovations that have come out of the defence sector, local and export demand, South Africa’s controversial...
 
 
 
 
 
This Week's Magazine
The Electronic Systems Laboratory (ESL) of the Department of Electrical and Electronic Engineering at Stellenbosch University is strongly reaffirming its position as one of South Africa’s leading centres for satellite technology and expertise. It is currently...
MORE IN SA Phase 2 should see local content on the mainline locomotive increase from 65% to 80% by the end of 2014
The world’s lowest-cost diesel-electric locomotive is not made in China, but in Pretoria, at RRL Grindrod Locomotives’ newly upgraded 30 000 m2 plant. The company’s locomotive pricing is “more competitive than any other original-equipment manufacturer (OEM)...
The South African Defence Review 2012, released to the public at the end of last month (despite the year given in its title) recommends the creation of the post of Chief Defence Scientist. This official would be responsible for the management of defence technology...
AltX-listed engineering technology company Ansys has been awarded an R188-million contract by Transnet to supply integrated dashboard display systems to the freight rail utility’s locomotives. Black-owned and controlled Ansys developed the bespoke integrated system...
South Africa’s sole nuclear power station Koeberg, which is located in the Western Cape, breached a major operations milestone on April 4, which marked the thirtieth anniversary of Unit 1 having been connected to the grid. Eskom, which operates the two-unit plant,...
 
 
 
 
 
 
 
 
 
Alert Close
Embed Code Close
content
Research Reports Close
Research Reports are a product of the
Research Channel Africa. Reports can be bought individually or you can gain full access to all reports as part of a Research Channel Africa subscription.
Find Out More Buy Report
 
 
Close
Engineering News
Completely Re-Engineered
Experience it now. Click here
*website to launch in a few weeks