Environmental News for a Healthier Planet and Life

Help Support EcoWatch

New Cooling Technology Protects Against Severe Heat and Viral Spread

New Cooling Technology Protects Against Severe Heat and Viral Spread
Exterior of Cold Tube demonstration pavilion. Lea Ruefenacht

By Gloria Oladipo

In the face of dangerous heat waves this summer, Americans have taken shelter in air conditioned cooling centers. Normally, that would be a wise choice, but during a pandemic, indoor shelters present new risks. The same air conditioning systems that keep us cool recirculate air around us, potentially spreading the coronavirus.

"Air conditioners look like they're bringing in air from the outside because they go through the window, but it is 100 percent recirculated air," said Forrest Meggers, an assistant professor of architecture at Princeton University. "If you had a system that could cool without being focused solely on cooling air, then you could actually open your windows."

Meggers and an international team of researchers have developed a safer way for people to beat the heat — a highly efficient cooling system that doesn't move air around.

Scientists lined door-sized panels with tiny tubes that circulate cold water. Stand next to a panel, and you can feel it drawing heat away from your body. Unlike air conditioners, these panels can be used with the window open — or even outdoors — making it possible to cool off while also getting some fresh air. This reduces the risk of spreading airborne viruses, like the coronavirus.

"If you look at what the health authorities and governments are saying, the safest place to be during this pandemic is outside," said Adam Rysanek, an assistant professor of environmental systems at the University of British Columbia, who was part of the research effort. "We're trying to find a way to keep you cool in a heat wave with the windows wide open, because the air is fresh. It's just that it's hot."

Cooling panels have been around for a while, but in limited use, because scientists haven't found a good way to deal with condensation. Like a cold can of Coke on a hot summer day, cooling panels collect drops of water, so they have to be paired with dehumidifiers indoors to stay dry. Otherwise, overhead panels might drip water on people standing underneath.

Meggers and his colleagues got around this problem by developing a thin, transparent membrane that repels condensation. This is the key breakthrough behind their cooling technology. Because it stays dry, it can be used in humid conditions, even outdoors.

In air conditioners, a dehumidifier dries out the air to prevent condensation. This component uses an enormous amount of energy, around half of the total power consumed by the air conditioner, researchers said. The new membrane they developed eliminates condensation with no energy cost, making the cooling panels significantly more efficient than a typical AC unit.

The research team involved scientists from the University of British Columbia, Princeton, UC Berkeley and the Singapore-ETH Centre. They published their findings in the Proceedings of the National Academy of Sciences.

"This study demonstrates that we can maintain comfortable conditions for people without cooling all the air around them," said Zoltan Nagy, an assistant professor of civil engineering at the University of Texas, who was not affiliated with the study. "Probably the most significant demonstration of this study is that humans can be provided with comfort in a very challenging thermal environment using a very efficient method."

Researchers developed their technology for use in the persistently hot, muggy climate of Singapore, where avoiding condensation would be particularly difficult.

To test their design, they assembled a set of cooling panels into a small tunnel, roughly the size of a school bus. The tunnel, dubbed the "Cold Tube," sat in a plaza in the United World College of South East Asia in Singapore. Scientists surveyed dozens of people about how they felt after walking through the tunnel. Even as the temperature neared 90 degrees F outside, most participants reported feeling comfortable in the Cold Tube.

Scientists said they want to make their technology available to consumers as quickly as possible, for use in homes and offices, or outdoors. Climate change is producing more severe heat, which is driving demand for air conditioners. Researchers hope their cooling panel will offer a more energy-efficient alternative to AC units. If consumers can use less power, that will help cut down on the pollution that is driving climate change.

Before they can sell the panels, researchers said they need to make them hardy enough to survive outdoors. The anti-condensation membrane is currently so thin that you could tear it with a pencil, so it must be made stronger. Scientists also need to demonstrate that the panels work efficiently indoors. Hospitals and schools in Singapore have already shown interest in the cooling system.

"We know the physics works. Now we need to do one more test so we have a bit more of a commercially viable product," Rysanek said. "It's really about trying to get this into people's hands as quickly as possible."

Reposted with permission from Nexus Media.

Sun Cable hopes to start construction of the world's largest solar farm in 2023. Sun Cable
A large expanse of Australia's deserted Outback will house the world's largest solar farm and generate enough energy to export power to Singapore, as The Guardian reported.
Read More Show Less

EcoWatch Daily Newsletter

Construction on the Muskrat Falls hydroelectric station in 2015. Government of Newfoundland and Labrador / CC BY-NC-ND 2.0

By Tara Lohan

In 1999 a cheering crowd watched as a backhoe breached a hydroelectric dam on Maine's Kennebec River. The effort to help restore native fish populations and the river's health was hailed as a success and ignited a nationwide movement that spurred 1,200 dam removals in two decades.

Read More Show Less


We pet owners know how much you love your pooch. It's your best friend. It gives you pure happiness and comfort when you're together. But there are times that dogs can be very challenging, especially if they are suffering from a certain ailment. As a dog owner, all you want to do is ease whatever pain or discomfort your best friend is feeling.

Read More Show Less
A new study has revealed that Earth's biggest mass extinction was triggered by volcanic activity that led to ocean acidification. Illustration by Dawid Adam Iurino (PaleoFactory, Sapienza University of Rome) for Jurikova et al (2020)

The excess carbon dioxide emitted by human activity since the start of the industrial revolution has already raised the Earth's temperature by more than one degree Celsius, increased the risk of extreme hurricanes and wildfires and killed off more than half of the corals in the Great Barrier Reef. But geologic history shows that the impacts of greenhouse gases could be much worse.

Read More Show Less
Coronavirus-sniffing dogs Miina and Kössi (R) are seen in Vantaa, Finland on September 2, 2020. Antti Aimo-Koivisto / Lehtikuva / AFP/ Getty Images

By Teri Schultz

Europe is in a panic over the second wave of COVID-19, with infection rates sky-rocketing and GDP plummeting. Belgium has just announced it will no longer test asymptomatic people, even if they've been in contact with someone who has the disease, because the backlog in processing is overwhelming. Other European countries are also struggling to keep up testing and tracing.

Meanwhile in a small cabin in Helsinki airport, for his preferred payment of a morsel of cat food, rescue dog Kossi needs just a few seconds to tell whether someone has coronavirus.

Read More Show Less

Support Ecowatch