Incorporating shading, improving ventilation and taking other actions to reduce the warming effect of the UAE’s hot climate can cut air conditioning demand in buildings by 40 per cent or more, a new study has found.
The research highlights the importance of passive cooling measures, which can keep temperatures down without using electricity.
Air conditioning accounts for as much as 70 per cent of the UAE’s electricity consumption, so reductions in usage could have a significant effect on the country’s power demand and carbon emissions.
The new study looked at the energy consumption of a two-storey villa with three bedrooms, plus living areas, with space for eight people.
Cooling designs
“By adding some passive design strategies like thermal insulation material (including green roofing), shading devices, and ventilation, we could minimise the demand for energy load cooling,” researchers from the University of Sharjah wrote in the study.
“[The UAE] should always consider passive cooling design in all residential, commercial and industrial buildings as a developing country.”
A green roof is one covered with vegetation to reduce heat in urban areas.
The General Services Administration, a US government agency, says green roofing can cut the amount of heat transferred to a building from the roof by up to 72 per cent.
Shading devices, meanwhile, refer to physical shades - either horizontal or vertical - that are attached to a building or put near to it to block out the sun.
The new study, Applying Passive Cooling Strategies to Improve Energy Consumption of Governmental Housing in the UAE, was presented at a conference in Iraq and published online by the American Institute of Physics Publishing last month.
In a separate study released in Cleaner Energy Systems last year, scientists in Qatar and Canada wrote that the growth in energy demand in buildings because of “excessive use of air conditioning” was an “alarming concern in hot and humid climates”.
Analysts have previously said that the low price of electricity in the UAE means that relying on air conditioning is often the default approach when buildings are designed.
The villa at the centre of the new study was chosen as an example of the type of housing provided by the UAE government, although the outcomes apply equally to private sector properties.
Without passive cooling features, the building’s energy demand was estimated to be about 8,000 kilowatt hours in January and 11,000 kilowatt hours in August, when energy demand increased due to higher temperatures.
Using computer modelling techniques that have been shown to give similar results to real-world studies, the researchers looked at what effect adding insulation to the walls, windows and roof could have.
They found a marked reduction in the electricity demand, with a fall to 4,200 kilowatt hours in January and 8,300 kilowatt hours in August. This represents a reduction in electricity consumption of 47.5 per cent in January and about 25 per cent in August.
Simple solutions
While its effects were smaller, shading also resulted in a fall in electricity consumption, to 7,000 kilowatt hours in January and 11,000 kilowatt hours in August.
A traditional way to achieve passive cooling in the UAE has been to incorporate a wind tower into a building, as this promotes airflow. Researchers found that adding one to their villa cut electricity use to 6,000 kilowatt hours and 8,000 kilowatt hours in January and August.
Ensuring that the building and its openings, such as windows, were orientated also helped to reduce heating cut demand.
If all measures were used together, consumption was 4,000 kilowatt hours in January – about half what it was with no passive cooling features – and 7,000 kilowatt hours in August, a reduction of about 42 per cent compared to the original villa.
“Overall, there is a possibility of reducing the cooling load by more than 40 per cent after applying these passive cooling strategies and saving up to 10 metric tonnes [of carbon dioxide] per year, which helps reduce global warming,” the researchers wrote.
Prof Emad Mushtaha, who chairs the Architectural Engineering Department at the University of Sharjah, said all the measures outlined in the study could be incorporated into buildings in the UAE, either at the design stage or after construction.
“All the proposed strategies are doable and can be implemented in the new design and retrofitted,” he said.
He said that while passive cooling measures could reduce the demand for air conditioning, they do not eliminate the need for it.
“The issue here is that in the UAE, passive design can only reduce a certain amount of energy consumption, but cannot achieve thermal comfort alone due to extreme temperatures. So the active system is important to achieve thermal comfort,” he said.
Globally, the number of air conditioning units is expected to triple by 2050, according to World Bank figures, as countries develop and demand increases amid rising average temperatures.
Over time, air conditioning units are likely to become more efficient, so the expected tripling in the number of installations is expected to result in a doubling of electricity consumption for air conditioning by the middle of the century.
The UAE is heavily involved in efforts to reduce electricity consumption by air conditioning units. In 2022, Strata, the aerospace unit of Mubadala, Abu Dhabi’s sovereign investor, signed a partnership with an AI company and an industrial 3D printing firm to develop an air conditioner 10 times as efficient as current models.
WOMAN AND CHILD
Director: Saeed Roustaee
Starring: Parinaz Izadyar, Payman Maadi
Rating: 4/5
THE BIO
Mr Al Qassimi is 37 and lives in Dubai
He is a keen drummer and loves gardening
His favourite way to unwind is spending time with his two children and cooking
AI traffic lights to ease congestion at seven points to Sheikh Zayed bin Sultan Street
The seven points are:
Shakhbout bin Sultan Street
Dhafeer Street
Hadbat Al Ghubainah Street (outbound)
Salama bint Butti Street
Al Dhafra Street
Rabdan Street
Umm Yifina Street exit (inbound)
GAC GS8 Specs
Engine: 2.0-litre 4cyl turbo
Power: 248hp at 5,200rpm
Torque: 400Nm at 1,750-4,000rpm
Transmission: 8-speed auto
Fuel consumption: 9.1L/100km
On sale: Now
Price: From Dh149,900
Lexus LX700h specs
Engine: 3.4-litre twin-turbo V6 plus supplementary electric motor
Power: 464hp at 5,200rpm
Torque: 790Nm from 2,000-3,600rpm
Transmission: 10-speed auto
Fuel consumption: 11.7L/100km
On sale: Now
Price: From Dh590,000
The specs
Engine: 3.9-litre twin-turbo V8
Transmission: seven-speed
Power: 720hp
Torque: 770Nm
Price: Dh1,100,000
On sale: now
Brief scoreline:
Liverpool 2
Mane 51', Salah 53'
Chelsea 0
Man of the Match: Mohamed Salah (Liverpool)
UAE squad
Esha Oza (captain), Al Maseera Jahangir, Emily Thomas, Heena Hotchandani, Indhuja Nandakumar, Katie Thompson, Lavanya Keny, Mehak Thakur, Michelle Botha, Rinitha Rajith, Samaira Dharnidharka, Siya Gokhale, Sashikala Silva, Suraksha Kotte, Theertha Satish (wicketkeeper) Udeni Kuruppuarachchige, Vaishnave Mahesh.
UAE tour of Zimbabwe
All matches in Bulawayo
Friday, Sept 26 – First ODI
Sunday, Sept 28 – Second ODI
Tuesday, Sept 30 – Third ODI
Thursday, Oct 2 – Fourth ODI
Sunday, Oct 5 – First T20I
Monday, Oct 6 – Second T20I
Our family matters legal consultant
Name: Hassan Mohsen Elhais
Position: legal consultant with Al Rowaad Advocates and Legal Consultants.
Credits
Produced by: Colour Yellow Productions and Eros Now
Director: Mudassar Aziz
Cast: Sonakshi Sinha, Jimmy Sheirgill, Jassi Gill, Piyush Mishra, Diana Penty, Aparshakti Khurrana
Star rating: 2.5/5
Brief scoreline:
Crystal Palace 2
Milivojevic 76' (pen), Van Aanholt 88'
Huddersfield Town 0
The specs
Engine: Four electric motors, one at each wheel
Power: 579hp
Torque: 859Nm
Transmission: Single-speed automatic
Price: From Dh825,900
On sale: Now
More on Quran memorisation:
COMPANY%20PROFILE
%3Cp%3E%0D%3Cbr%3E%3Cstrong%3ECompany%20name%3A%20%3C%2Fstrong%3EClara%0D%3Cbr%3E%3Cstrong%3EStarted%3A%20%3C%2Fstrong%3E2019%0D%3Cbr%3E%3Cstrong%3EFounders%3A%20%3C%2Fstrong%3EPatrick%20Rogers%2C%20Lee%20McMahon%2C%20Arthur%20Guest%2C%20Ahmed%20Arif%0D%3Cbr%3E%3Cstrong%3EBased%3A%20%3C%2Fstrong%3EDubai%0D%3Cbr%3E%3Cstrong%3EIndustry%3A%20%3C%2Fstrong%3ELegalTech%0D%3Cbr%3E%3Cstrong%3EFunding%20size%3A%3C%2Fstrong%3E%20%244%20million%20of%20seed%20financing%0D%3Cbr%3E%3Cstrong%3EInvestors%3A%20%3C%2Fstrong%3EWamda%20Capital%2C%20Shorooq%20Partners%2C%20Techstars%2C%20500%20Global%2C%20OTF%2C%20Venture%20Souq%2C%20Knuru%20Capital%2C%20Plug%20and%20Play%20and%20The%20LegalTech%20Fund%3C%2Fp%3E%0A
The specs
Engine: 2.0-litre 4cyl turbo
Power: 261hp at 5,500rpm
Torque: 405Nm at 1,750-3,500rpm
Transmission: 9-speed auto
Fuel consumption: 6.9L/100km
On sale: Now
Price: From Dh117,059
Women%E2%80%99s%20T20%20World%20Cup%20Qualifier
%3Cp%3EFrom%20September%2018-25%2C%20Abu%20Dhabi%0D.%20The%20two%20finalists%20advance%20to%20the%20main%20event%20in%20South%20Africa%20in%20February%202023%0D%3Cbr%3E%20%0D%3Cbr%3EGroup%20A%3A%20United%20States%2C%20Ireland%2C%20Scotland%2C%20Bangladesh%0D%3Cbr%3EGroup%20B%3A%20UAE%2C%20Thailand%2C%20Zimbabwe%2C%20Papua%20New%20Guinea%0D%3Cbr%3E%20%0D%3Cbr%3EUAE%20group%20fixtures%3A%0D%3Cbr%3ESept%2018%2C%203pm%2C%20Zayed%20Cricket%20Stadium%20%E2%80%93%20UAE%20v%20Thailand%0D%3Cbr%3ESept%2019%2C%203pm%2C%20Tolerance%20Oval%20-%20PNG%20v%20UAE%0D%3Cbr%3ESept%2021%2C%207pm%2C%20Tolerance%20Oval%20%E2%80%93%20UAE%20v%20Zimbabwe%0D%3Cbr%3E%20%0D%3Cbr%3EUAE%20squad%3A%20Chaya%20Mughal%20(captain)%2C%20Esha%20Oza%2C%20Kavisha%20Kumari%2C%20Rinitha%20Rajith%2C%20Rithika%20Rajith%2C%20Khushi%20Sharma%2C%20Theertha%20Satish%2C%20Lavanya%20Keny%2C%20Priyanjali%20Jain%2C%20Suraksha%20Kotte%2C%20Natasha%20Cherriath%2C%20Indhuja%20Nandakumar%2C%20Vaishnave%20Mahesh%2C%20Siya%20Gokhale%2C%20Samaira%20Dharnidharka%0D%3C%2Fp%3E%0A
'The Last Days of Ptolemy Grey'
Rating: 3/5
Directors: Ramin Bahrani, Debbie Allen, Hanelle Culpepper, Guillermo Navarro
Writers: Walter Mosley
Stars: Samuel L Jackson, Dominique Fishback, Walton Goggins
Results:
Men's 100m T34: 1. Walid Ktila (TUN) 15 sec; 2. Rheed McCracken (AUS) 15.40; 3. Mohammed Al Hammadi (UAE) 15.75. Men's 400m T34: 1. Walid Ktila (TUN) 50.56; 2. Mohammed Al Hammadi (UAE) 50.94; 3. Henry Manni (FIN) 52.24.
VEZEETA PROFILE
Date started: 2012
Founder: Amir Barsoum
Based: Dubai, UAE
Sector: HealthTech / MedTech
Size: 300 employees
Funding: $22.6 million (as of September 2018)
Investors: Technology Development Fund, Silicon Badia, Beco Capital, Vostok New Ventures, Endeavour Catalyst, Crescent Enterprises’ CE-Ventures, Saudi Technology Ventures and IFC
Tiger%20Stripes%20
%3Cp%3E%3Cstrong%3EDirector%3A%3C%2Fstrong%3E%20Amanda%20Nell%20Eu%C2%A0%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EStars%3A%3C%2Fstrong%3E%20Zafreen%20Zairizal%2C%20Deena%20Ezral%20and%20Piqa%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3ERating%3A%3C%2Fstrong%3E%204.5%3C%2Fp%3E%0A
Chatham House Rule
A mark of Chatham House’s influence 100 years on since its founding, was Moscow’s formal declaration last month that it was an “undesirable
organisation”.
The depth of knowledge and academics that it drew on
following the Ukraine invasion had broadcast Mr Putin’s chicanery.
The institute is more used to accommodating world leaders,
with Nelson Mandela, Margaret Thatcher among those helping it provide
authoritative commentary on world events.
Chatham House was formally founded as the Royal Institute of
International Affairs following the peace conferences of World War One. Its
founder, Lionel Curtis, wanted a more scientific examination of international affairs
with a transparent exchange of information and ideas.
That arena of debate and analysis was enhanced by the “Chatham
House Rule” states that the contents of any meeting can be discussed outside Chatham
House but no mention can be made identifying individuals who commented.
This has enabled some candid exchanges on difficult subjects
allowing a greater degree of free speech from high-ranking figures.
These meetings are highly valued, so much so that
ambassadors reported them in secret diplomatic cables that – when they were
revealed in the Wikileaks reporting – were thus found to have broken the rule. However,
most speeches are held on the record.
Its research and debate has offered fresh ideas to
policymakers enabling them to more coherently address troubling issues from climate
change to health and food security.
Results
Ashraf Ghani 50.64 per cent
Abdullah Abdullah 39.52 per cent
Gulbuddin Hekmatyar 3.85 per cent
Rahmatullah Nabil 1.8 per cent
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RESULTS
5pm: Handicap (PA) Dh80,000 (Turf) 2,200m
Winner: Jawal Al Reef, Fernando Jara (jockey), Ahmed Al Mehairbi (trainer)
5.30pm: Handicap (PA) Dh80,000 (T) 1,600m
Winner: AF Seven Skies, Bernardo Pinheiro, Qais Aboud
6pm: Maiden (PA) Dh80,000 (T) 1,200m
Winner: Almahroosa, Fabrice Veron, Eric Lemartinel
6.30pm: Maiden (PA) Dh80,000 (T) 1,200m
Winner: AF Sumoud, Tadhg O’Shea, Ernst Oertel
7pm: Wathba Stallions Cup Handicap (PA) Dh70,000 (T) 1,200m
Winner: AF Majalis, Tadhg O’Shea, Ernst Oertel
7.30pm: Handicap (TB) Dh90,000 (T) 1,400m
Winner: Adventurous, Sandro Paiva, Ali Rashid Al Raihe
Moving%20Out%202
%3Cp%3E%3Cstrong%3EDeveloper%3A%3C%2Fstrong%3E%20SMG%20Studio%3Cbr%3E%3Cstrong%3EPublisher%3A%3C%2Fstrong%3E%20Team17%3Cbr%3E%3Cstrong%3EConsoles%3A%3C%2Fstrong%3E%20Nintendo%20Switch%2C%20PlayStation%204%26amp%3B5%2C%20PC%20and%20Xbox%20One%3Cbr%3E%3Cstrong%3ERating%3A%3C%2Fstrong%3E%204%2F5%3C%2Fp%3E%0A
The specs
Engine: 6.2-litre supercharged V8
Power: 712hp at 6,100rpm
Torque: 881Nm at 4,800rpm
Transmission: 8-speed auto
Fuel consumption: 19.6 l/100km
Price: Dh380,000
On sale: now
Uefa Nations League: How it works
The Uefa Nations League, introduced last year, has reached its final stage, to be played over five days in northern Portugal. The format of its closing tournament is compact, spread over two semi-finals, with the first, Portugal versus Switzerland in Porto on Wednesday evening, and the second, England against the Netherlands, in Guimaraes, on Thursday.
The winners of each semi will then meet at Porto’s Dragao stadium on Sunday, with the losing semi-finalists contesting a third-place play-off in Guimaraes earlier that day.
Qualifying for the final stage was via League A of the inaugural Nations League, in which the top 12 European countries according to Uefa's co-efficient seeding system were divided into four groups, the teams playing each other twice between September and November. Portugal, who finished above Italy and Poland, successfully bid to host the finals.
Results
%3Cp%3E%3Cstrong%3EStage%207%3A%3C%2Fstrong%3E%3Cbr%3E1.%20Adam%20Yates%20(GBR)%20UAE%20Team%20Emirates%20%E2%80%93%203hrs%2029min%2042ses%3Cbr%3E2.%20Remco%20Evenepoel%20(BEL)%20Soudal%20Quick-Step%20%E2%80%93%2010sec%3Cbr%3E3.%20Geoffrey%20Bouchard%20(FRA)%20AG2R%20Citroen%20Team%20%E2%80%93%2042sec%3Cbr%3E%3Cstrong%3EGeneral%20Classification%3A%3C%2Fstrong%3E%3Cbr%3E1.%20Remco%20Evenepoel%20(BEL)%20Soudal%20Quick-Step%3Cbr%3E2.%20Lucas%20Plapp%20(AUS)%20Ineos%20Grenaders%20%E2%80%93%2059se%3Cbr%3E3.%20Adam%20Yates%20(GBR)%20UAE%20Team%20Emirates%20%E2%80%9360sec%3Cbr%3ERed%20Jersey%20(General%20Classification)%3A%20Remco%20Evenepoel%20(BEL)%20Soudal%20Quick-Step%3Cbr%3EGreen%20Jersey%20(Points%20Classification)%3A%20Tim%20Merlier%20(BEL)%20Soudal%20Quick-Step%3Cbr%3EWhite%20Jersey%20(Young%20Rider%20Classification)%3A%20Remco%20Evenepoel%20(BEL)%20Soudal%20Quick-Step%3Cbr%3EBlack%20Jersey%20(Intermediate%20Sprint%20Classification)%3A%20Edward%20Planckaert%20(FRA)%20Alpecin-Deceuninck%3C%2Fp%3E%0A
LOS ANGELES GALAXY 2 MANCHESTER UNITED 5
Galaxy: Dos Santos (79', 88')
United: Rashford (2', 20'), Fellaini (26'), Mkhitaryan (67'), Martial (72')
