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Cold Tube cooling system uses half the energy of traditional air conditioners


Global warming leads to dramatic growththe consumption of energy spent on cooling the premises. As a result, humanity needs more and more energy-generating installations, which exacerbates the problem of climate change. An international team of scientists from the University of British Columbia, Princeton University, UC Berkeley and the ETH Singapore Center have proposed Cold Tube technology, which allows not only to halve the energy consumption needed to create a comfortable environment, but to use the system with open windows or even in open areas.

The principle of operation of modern air conditioners is basedon cooling the entire volume of air while reducing humidity in a closed room. The proposed Cold Tube technology is based on the principle of direct heat extraction directly from the human body, without the need to cool the entire volume of air in the room.


Cold Tube is a rectangular wall systemor ceiling panels cooled by circulating chilled water. Since heat naturally moves due to radiation from a hotter surface to a colder one, when a person is near or under a panel, his body heat is radiated towards a colder plane. This creates a cooling sensation, as if cold air flows around the body, even if the air temperature is high enough.

Demonstration stand built in an outdoorair in Singapore last year showed excellent results: almost all of the 55 members of the public confirmed that they felt “cool” or “comfortable” despite the fact that the average temperature was 30 degrees Celsius. At the same time, the panels remained dry due to a membrane that transmits thermal radiation, but insulates against moisture penetration.


In addition to significantly reducing energy consumption,The Cold Tube system can operate in rooms with open windows, which allows constant ventilation of the room, which is especially important in the context of the ongoing spread of the COVID-19 pandemic. Scientists are currently analyzing the data obtained after the first testing of the technology and by 20222 they plan to release the installation for commercial use.

Source: ubc