In most of the MENA and the Gulf region, we reach for the A/C control when entering any living or working space. But as we casually flip a switch, we tend not to consider all those carbon emissions caused by machines.
After years of indulgence and as witnessed by all of the end results, climate change is forcing all to go green by trying to keep buildings cool as it gets hotter. Greening the Global Construction Industry has already engaged in developing new techniques, tools, products and technologies – such as heat pumps, better windows, more vital insulation, energy-efficient appliances, renewable energy and more imaginative design – has enabled emissions to stabilize the past few years.
The above image is of I Love Qatar
Keep buildings cool as it gets hotter by resurrecting traditional architectural techniques – podcast
The Conversation Weekly podcast is now back after a short break. Every Thursday, we explore the fascinating discoveries researchers are using to make sense of the world and the big questions they’re still trying to answer.
In this episode we find out how “modern” styles of architecture using concrete and glass have often usurped local building techniques better suited to parts of the world with hotter climates. Now some architects are resurrecting traditional techniques to help keep buildings cool.
From western Europe to China, North Africa and the US, severe heatwaves brought drought, fire and death to the summer of 2022. The heatwaves also raised serious questions about the ability of existing infrastructure to cope with extreme heat, which is projected to become more common due to climate change.
Yet, for thousands of years, people living in parts of the world used to high temperatures have deployed traditional passive cooling techniques in the way they designed their buildings. In Nigeria, for example, people have long used biomimicry to copy the style of local flora and fauna as they design their homes, according to Anthony Ogbuokiri, a senior lecturer in architectural design at Nottingham Trent University in the UK.
But in the 20th century, cities even in very hot climates began following an international template for building design that meant cities around the world, regardless of where they were, often had similar looking skylines. Ogbuokiri calls this “duplitecture”, and says it “ramped up the cooling load” due to an in-built reliance on air conditioners.
Alongside this, there was a massive boom in the use of concrete, particularly after the second world war when the Soviet Union and the US started gifting their cold war allies concrete technology. “It was a competition both to discover who actually mastered concrete and who was better at gathering the materials, the people and the energy to make concrete,” explains Vyta Pivo, assistant professor of architecture at the University of Michigan in the US. But too much concrete can contribute to the phenomenon of urban heat islands, where heat is concentrated in cities. Concrete is also a considerable contributor to global carbon emissions.
Some architects and researchers are working to rehabilitate and improve traditional passive techniques that help keep buildings cool without using energy. Susan Abed Hassan, a professor of architectural engineering at Al-Nahrain University in Baghdad, Iraq, focuses a lot on windcatchers in her work, a type of chimney which funnels air through houses to keep them cooler in hot climates. She’s now looking at how to combining underground water pipes with windcatchers to enhance their cooling effects.
Listen to the full episode to find out about other techniques being used to keep buildings cool without relying on air conditioning.
This episode was produced by Mend Mariwany, with sound design by Eloise Stevens. The executive producer was Gemma Ware. Our theme music is by Neeta Sarl. You can find us on Twitter @TC_Audio, on Instagram at theconversationdotcom or via email. You can also sign up to The Conversation’s free daily email here. A transcript of this episode is available here.
Read the original article.
It’s an essential component of the design process, where spatial ideations are translated into built form – the design of the prototype. Architectural projects, throughout history and in contemporary practice, have been prototyped to carry out both technical and aesthetic tests, where further insight is gained into the integrity of the design. It’s the blurred line between the experimental and the practical.
Antoni Gaudí’s 1:25 and 1:10 scale plaster models of Sagrada Família can be defined as architectural prototypes, and so can the wooden model of Filippo Brunelleschi’s Florence Cathedral dome. But these are investigations conducted on a smaller scale. It can be argued that architectural prototypes are most effective when built out 1:1, from which further architectural interventions based on the prototype have the security of a design attempt that is not a scaled-down version of the finished product.
But the making of these prototypes is a protracted endeavor – necessitating the complex maneuvering of resources, labor, and capital – for a structure that aims to merely lay the foundations for how similar designs should be approached in the future.
When scrutinized from the perspective of the Global South, this dialogue is complicated further – in countries that have been historically over-exploited and are currently under-resourced, are full-scale architectural prototypes wasteful if they don’t immediately function as a working building? Is it right for these prototypes to simply exist as say, explorations of new materials without serving as a structure that will be in constant use from its inception?
In colonial Africa, architectural experimentation was commonplace, from Fry and Drew in West Africa to Guido Ferrazza in Libya. This experimentation included that of French industrial designer and architect Jean Prouvé, who in 1949 developed Maison Tropicales – prefabricated, modular housing prototypes constructed out of aluminum designed to be easily transported, assembled, and disassembled.
The design problem that the Maison Tropicales had to solve was climatic – as France’s African colonies faced a shortage of housing and civic buildings. The prototype was designed for the equatorial climate, including a veranda with an adjustable aluminum sun-screen. Internally, walls were made of a combination of sliding and fixed metal panels – as glass portholes provided protection against UV rays.
But despite this resourceful, ingenious response to the tropical climate, the Maison Tropicale as a prototype failed. It was no less expensive than locally constructed buildings, and the French colonial bureaucrats did not warm to the industrial appearance of the house. The prototype, ultimately, was a colonial project built for French administrators. A prototype built for the colonial class that proved unpopular with them, and that instead of being widely adopted, was resigned to be a traveling object, making frequent appearances in design exhibitions. This prototype of the African Tropics became a design object that to most, was known outside of its intended context.
But contemporary practice in the Global South has offered up more substantial prototypes, where investigations into materials are coupled with substantial usage. Senegalese firm Worofila’s Ecopavillon in Diamniadio, constructed in 2019, is one such example. Commissioned by the Ministry of the Environment of Senegal, it is built with earth and typha – a type of water reed found in the Senegal River. Woven typha panels provide sound insulation, and when mixed with adobe bricks, provide thermal insulation.
As the prototype is part of the Senegalese government’s initiative to build a new city to ease congestion in Dakar, its usage is still in its early stages. The intention, though, is clear. The Ecopavillon will allow the monitoring of how the building’s materials behave, and performance can be assessed. the behavior of materials and to measure the performance of buildings. Furthermore, it can act as a training venue for craftspeople, where local knowledge of energy-efficient materials can be further developed.
The most tangible example of a living prototype in the Global South, however, is arguably found in Bangladesh, in Marina Tabassum Architects’ Khudi Bari. It is a modular mobile housing unit, with an area of 128 square feet. Its light footprint and elevated form mimic the architectural vernacular of the Bengal delta, but more pressingly, it responds to climate change.
In an area with high instances of flash flooding, the raised second level acts as shelter for occupants as they await the receding of the water. In the Chars of Bangladesh – low-lying islands naturally formed by silt from rivers – the spaceframe structure is a crucial response, low cost, durable, and easily assembled and disassembled with minimum labor.
The true success of the Khudi Bari project can only be measured by what happens after the housing modules are built. A pilot project initiated by a non-profit organization affiliated with Marina Tabassum Architects in conjunction with private and governmental donors aims to establish at least 80 to 100 “Khudi Bari” modules in the flood-prone communities of Bangladesh by May 2023.
More crucially, March 2021 saw the first three homes built in collaboration with families, with some adapting their modules, with the vision for the future being that people involved in this pilot project will then become part of the training collective as the modules are initiated in other areas.
Perhaps this is how architectural prototypes built in the Global South should function – as bold, inventive assemblages, that are not only for observation and display, but instead examples of architecture that is dynamic, in use, and living.
Read related Article: Why Bamboo is the Future of Asian Construction
GULF BUSINESS in this interview with one of AUTODESK’s directors in the Gulf on how it is helping its customers towards a sustainable future and eventually go through their transition to sustainable construction.
How Autodesk is helping its customers in creating a sustainable future
Louay Dahmash, senior director at Autodesk, talks about the company’s vision to create real, meaningful impact with its technology and accelerate industry transformation
Energy efficiency: Rome was not built in a day, or so the saying goes. In November 2021, the UAE pledged to achieve net-zero emissions by 2050 and, in doing so, became the first Gulf state to commit to a timeline to decarbonise its economy and fully reach net-zero greenhouse gas emissions.
Not that this happened out of the blue; the UAE has been heavily financing clean energy projects such as Masdar, Sustainable City, and the Barakah nuclear plant for over 15 years, inexorably pushing the sustainability envelope in the region and worldwide.
The country has always been known for its sky-high ambitions and impressive success rate, of that there is little doubt. However, the net-zero target marks a real turning point in the way things are done in the UAE and, more importantly, sets up a challenging and exciting target. It requires an exact drive for the future, challenged only by the limitations of sustainable development.
The previously held reliance on oil is changing, and the region is shifting towards alternative options. Shifting towards an ecological mindset remains at the core of any decisions that need to be made moving forward. The UAE is proudly leading the way in the region alongside the Kingdom of Saudi Arabia.
Following the pledge to reduce emissions at the 2015 Paris agreement, many countries fell through on the promise to achieve short-term goals, but structurally altering the policies of a nation takes time, and changes are slowly and surely being made across the globe. In the UAE, winning the bid to host the COP28 global climate talks in 2023 further cements the seriousness and gravity of the 2050 target and, amongst other things, the future of green buildings and the built environment in the region.
Energy efficiencies and net-zero goals
Net-zero emissions are essentially focused on maintaining a balance between the greenhouse gases created and the amount that are taken out. In addition to reducing carbon emissions, there is also reliance on carbon offsetting or carbon removal.
Internationally recognised guidelines require most companies to decarbonise 90-95% of all CO2 emissions through internal abatement options to reach net-zero. For the remaining 5-10% of emissions, qualifying neutralisation activities can be used. Those neutralisation activities are not referred to as offsets, but instead include only activities that directly pull carbon out of the atmosphere, which can be done through Direct Air Capture, bioenergy with carbon capture and storage, improved soil and forest management, and land restoration. This is a contrast to the term ‘zero carbon,’ which concentrates on reducing existing carbon emissions to zero.
It is a well-known fact that the construction industry is a leading cause of C02 emissions, with 39% of global CO2 emissions attributed to building and construction. This means that any small changes within the industry can enormously impact the environment and climate change.
So, how can buildings reduce their impact on the environment? The immediate answer to these questions lies within the innovation of Low and net-zero Energy and Carbon Strategies. A net-zero building produces as much energy as it consumes on an annual basis. This energy balance is propped up by maintaining energy efficiency by the effective design of building operations.