Our directory of things of interest

University Directory

Cold sweat: the high cost of aircon

There are currently 1.6 billion aircon units in use around the world There are currently 1.6 billion aircon units in use around the world
14 Jul
2018
Soaring sales of air conditioning units over the next thirty years are set to rapidly escalate global levels of energy demand

As the temperature rises, sweaty and flustered humans are kickstarting a feedback loop that is further exacerbating the problem of climate change. At present, the world has 1.6 billion air conditioning units, which collectively use a staggering ten per cent of all global electricity demand. While less than a third of households globally are so equipped, the most AC-addicted countries are Japan (in 91 per cent of households), the US (90 per cent) and South Korea (86 per cent).

New research by the International Energy Agency (IEA) estimates that the total number of units is set to more than triple to 5.6 billion by 2050 – equal to ten new units being sold every second for more than 30 years – with sales driven particularly by India, China and Indonesia. This will make the use of air conditioning one of the world’s largest demands for energy, equivalent to adding the entirety of the EU, the US and Japan’s current energy capacity to the global grid.

‘Growing electricity demand for air conditioning is one of the most critical blind spots in today’s energy debate,’ argues Fatih Birol, executive director of the IEA. ‘With rising incomes, air conditioner ownership will skyrocket, especially in the emerging world. While this will bring improve daily lives, it is essential that efficiency performance be prioritised.’

Birol and the IEA emphasise the need for new efficiency standards to ensure that consumers are at least buying units that require significantly less power to function, therefore mitigating the overall energy demand. Variations on the traditional ‘vapour compression’ technology which has formed the basis for AC units for more than a century, may figure prominently. A water-based system was recently developed by researchers at the National University of Singapore (NUS) which, by using a de-humidifying membrane instead of chemical refrigerants such as chlorofluorocarbon and hydrochlorofluorocarbon, uses 40 per cent less electricity, and produces only one by-product: potable drinking water.

‘Our cooling technology can be tailored for all types of weather conditions, from humid climate in the tropics to arid climate in the deserts,’ says associate professor Ernest Chua from the Department of Mechanical Engineering at NUS. ‘While it can be used for indoor living and commercial spaces, it can also be easily scaled up to provide air-conditioning for clusters of buildings in an energy-efficient manner.’

This was published in the July 2018 edition of Geographical magazine

geo line break v3

Free eBooks - Geographical Newsletter

Get the best of Geographical delivered straight to your inbox by signing up to our weekly newsletter and get a free collection of eBooks!

geo line break v3

Related items

Subscribe and Save!

geo line break v3

Free eBooks - Geographical Newsletter

Sign up for our weekly newsletter today and get a FREE eBook collection!

geo line break v3

University of Winchester

geo line break v3

EDUCATION PARTNERS

Aberystwyth University University of Greenwich The University of Derby

TRAVEL PARTNERS

Ponant

Silversea

Travel the Unknown

NEVER MISS A STORY - Follow Geographical on Social

Want to stay up to date with breaking Geographical stories? Join the thousands following us on Twitter, Facebook and Instagram and stay informed about the world.

More articles in NATURE...

Climate

Parkesine, celluloid and Bakelite – the first three kinds of…

Geophoto

Flat and level landscapes might not have much to offer…

Geophoto

Winning entries include meerkats, zebra sharks and courting nudibranches

Oceans

The UN’s World Ocean Day is a day to celebrate…

Nature

Breathe easier this World Environment day with this collection of…

Climate

A 50-year look at the activity of aphids, moths, butterflies…

Geophoto

The British Isles are packed with natural landmarks that serve…

Geophoto

The prestigious photography awards to go on display in some…

Tectonics

The discovery of a slow-motion earthquake near Istanbul, which took…

Oceans

The 2014 to 2016 marine heatwave, which took place off…

Climate

Marco Magrini discovers that hydrogen is back, but hopefully not…

Wildlife

 A ten-year analysis of chimpanzees has revealed that the presence…

Wildlife

The return of the pine marten to UK forests has…

Energy

A project in Orkney is converting excess wind energy into…

Geophoto

Mountains provide a dramatic sight at the best of times,…

Wildlife

A surge in reports of dead hares has resulted in…

Oceans

Four scientists have banded together to make the case against the farming of octopuses, arguing…

Climate

As planetary oil consumption hits the 100-million-barrel mark Marco Magrini…

Oceans

A ship that ran aground early in February has been…

Wildlife

Two whale populations on either side of the African continent…