Tag Archives: Cool

Researchers develop a new, more efficient way to keep cool — the ‘Cold Tube’

With the world getting hotter, finding energy-efficient ways to cool down is more important than ever. A team of researchers from the University of British Columbia, Princeton University, the University of California, Berkeley and the Singapore-ETH Centre plan to help us do just that with the ‘Cool Tube’.

The experimental pavilion setup in Singapore.
Image credits Lea Ruefenacht.

Air conditioning can be a blessing in the hot summer months, but they also consume a lot of power. Added up on a city- or country-wide scale this translates to a huge drain on our grids and vast quantities of CO2 emissions. Air conditioning can also contribute to respiratory complications by keeping germs in suspension in the air (by keeping it in constant motion).

The team behind Cold Tube wanted to change how we manage our personal temperature during such times, and their approach doesn’t involve cooling or moving air at all.

Cool cooling ideas

“Air conditioners work by cooling down and dehumidifying the air around us—an expensive and not particularly environmentally friendly proposition,” explains co-lead author Adam Rysanek, assistant professor of environmental systems at UBC’s school of architecture and landscape architecture.

“The Cold Tube works by absorbing the heat directly emitted by radiation from a person without having to cool the air passing over their skin. This achieves a significant amount of energy savings.”

The system consists of a series of rectangular panels that can be fitted to walls or ceilings. These elements are kept cool by chilled water being circulated through them.

The idea behind the Cold Tube is that heat naturally radiates from hot surfaces to colder ones — that’s how heat from the Sun makes it to Earth. When you sit under or near one of these elements, your body heat will radiate towards it. The team describes this effect as similar to the sensation of cold air flowing over your body, even when ambient temperatures are high.

It’s not a new concept — in fact, it’s been in use in industrial settings for several decades now. What Cold Tube does differently, however, is to use a special coating that does away with the need to dehumidify air.

A look inside a pavilion incorporating the Cold Tube system
A look inside the pavilion.
Image credits Lea Ruefenacht.

Humidity in the air condenses on cold surfaces, which can cause hygiene issues and damage surfaces and materials. The team developed an airtight, water-repellent membrane that encases their panels, and prevents condensation from forming (but still allows the system to function as intended).

The researchers tested their system in an outdoor setting in Singapore last year. The temperature outside during the test was 30 degrees Celsius (86 degrees Fahrenheit) on average. Yet, participants reported feeling ‘cool’ and ‘comfortable’ despite the heat, and the panels remained dry throughout the day.

“Because the Cold Tube can make people feel cool without dehumidifying the air around them, we can look towards shaving off up to 50 percent of typical air conditioning energy consumption in applicable spaces,” said Eric Teitelbaum, a senior engineer who oversaw the demonstration project while working at the Singapore-ETH Centre.

“This design is ready. It can obviously be used in many outdoor spaces—think open-air summer fairs, concerts, bus stops, and public markets. But the mission is to adapt the design for indoor spaces that would typically use central air conditioning.”

The system doesn’t rely on cooling air, like a traditional air conditioner, so it can even be used with an open window, or in open spaces. The team hopes that its low operating cost will make the Cold Tube an attractive option for both developed and developing countries. A commercially viable version of the system is expected for 2022.

The paper “Membrane-assisted radiant cooling for expanding thermal comfort zones globally without air conditioning” has been published in the journal PNAS.

Designer Oscar Lhermitte brings the moon to your fingertips

We love art that not only thrills your senses but also makes you think, and this project does just that. Oscar Lhermitte’s MOON brings the stunning beauty of the lunar globe on your desk — 100% topographically accurate.


There are few sights as captivating the full moon on a clear night’s sky. There’s something very tranquil and beautiful in seeing the white aster transiting the sky. Probably driven by similar emotions, product designer Oscar Lhermitte took the feeling down from the sky and brought it to our fingertips — at a 1:20 million scale.

Teaming up with design studio Kudu, he spent 4 years constructing a topographically accurate lunar globe from data recorded by NASA’s Lunar Reconnaissance Orbiter.

In order to create the lunar globe, Oscar first reached out to the team at the Institute of Planetary Research. They gave him access to their database, which he used to design the MOON. The data used are DTM (Digital Terrain Model) and are constructed from stereo images.

The images were then developed to achieve the correct scale of terrain and make it spherical. One full Moon was 3D printed in order to become the MOON Master (the one the molds are then made from).

All images provided by Oscar Lhemitte

The globe is dotted with all of the moon’s craters in precise detail, so you can get an exquisite feel of our planet’s favorite satellite.



A ring of LEDs follows the path of the Moon in real time, keeping its correct face constantly lit. You either set the moon to the position you desire, see all of its phases in 30 seconds in demo mode or switch it to live to have it synchronize with the current position of the actual moon.

MOON has 3 modes of operation:

  1. Manual – allowing you to rotate the sun yourself, setting the lunar phase that you would like to see.
  2. Demo – letting you observe a synodic month in just 30 seconds.
  3. Live – Synchronising itself with the current position of the real moon. All MOONs are manufactured in London, England.


Also, MOON’s system has the exact same memory capacity as the Apollo 11 computers that brought the first people to the moon. You can’t get any more lunar than this without leaving the planet.

MOON was available £500 on Kickstarter with a discounted price of £450 for early backers. Now, the retail price price is £700. MOON was successfully launched on Kickstarter in May 2016 and raised more than £140K.

All image credits go to Oscar Lehrmitte.