CU Boulder and University of Wyoming engineers have successfully scaled up an innovative water-cooling system capable of providing continuous day-and-night radiative cooling for structures. The advance could increase the efficiency of power generation plants in summer and lead to more efficient, environmentally-friendly temperature control for homes, businesses, utilities and industries.
The new research demonstrates how the low-cost hybrid organic-inorganic radiative cooling metamaterial, which debuted in 2017, can be scaled into a roughly 140-square-foot array—small enough to fit on most rooftops—and act as a kind of natural air conditioner with almost no consumption of electricity.
“You could place these panels on the roof of a single-family home and satisfy its cooling requirements,” said Dongliang Zhao, lead author of the study and a postdoctoral researcher in CU Boulder’s Department of Mechanical Engineering.
The technology, which takes advantage of natural radiative cooling principles, is described today in the journal Joule.
“As Earth’s temperature warms due to the absorbed heat from the sunlight during the day, it continuously emits infrared light to the cold universe all the time,” said Professor Ronggui Yang of Mechanical Engineering and lead author of the study. “During the night, Earth cools down due to the emission without the sunshine.”
The researchers’ film-like material reflects incoming almost all sunlight while still allowing an object’s stored heat to escape as much as possible, keeping it cooler than ambient air even in the midday sun.
“The material, which we can now produce at low cost using the current roll-to-roll manufacturing techniques, offers significant advantages.” said Associate Professor Xiaobo Yin of Mechanical Engineering and CU Boulder’s Materials Science and Engineering Program.
“We can now apply these materials on building roof tops, and even build large-scale water cooling systems like this one with significant advantages over the conventional air conditioning systems, which require high amounts of electricity to function,” said Associate Professor Gang Tan of the University of Wyoming’s Department of Civil and Architectural Engineering.
The researchers tested their system outdoors in a variety of weather conditions, including wind, precipitation and humidity. In experiments conducted in August and September 2017, their proprietary RadiCold module kept a container of water covered by the metamaterial 20 degrees Fahrenheit cooler than the ambient air between 12:30 p.m. and 3 p.m., the most intense summer sunlight of the day.
The researchers also introduced an element of dynamic scheduling to their technology, anticipating that structures such as offices may have limited or no cooling demand at night. In a building-integrated system, however, a cold storage unit could be added to capture the cold through heat transfer fluid such as water in this system and allow it to be retrieved during the subsequent day to reduce the cooling strain during peak demand periods.
“We have built a module that performs in real-world, practical situations,” said Yang. “We have moved quite far and fast from a materials level to a system level.”
The RadiCold module could become a viable solution for supplemental cooling for single-family homes, businesses, power plants, municipal utilities and data center facilities among other potential applications, Yang said.
Receive an email update when we add a new RADIATIVE COOLING TECHNOLOGY article.
The Latest on: Radiative cooling technology
via Google News
The Latest on: Radiative cooling technology
New solar panels can heat during the day and cool at night
on November 12, 2018 at 8:12 am
Radiative cooling is the process by which a body loses heat by thermal ... although the initial results are promising. The implications of the technology on energy use could be significant, especially ... […]
Stanford researchers develop a rooftop device that can make solar power and cool buildings
on November 12, 2018 at 2:04 am
In radiative cooling, objects – including our own bodies ... ultimately into the vast coldness of space. Fan’s cooling technology takes advantage of the fact that this thick atmospheric blanket essent... […]
New Air-Conditioner Absorbs Solar Energy and Blasts Radiation Into Space
on November 9, 2018 at 2:00 pm
But some of it can escape into space. But this new technology, known as “radiative cooling,” capitalizes on this process and uses infrared light to cool its surrounding area, essentially ... […]
The Forecast on Energy-Efficient Cooling Just Got a Bit Sunnier
on November 8, 2018 at 2:44 pm
The cooling half of this new technology, pioneered by electrical engineer Shanhui Fan of Stanford University, takes advantage of the natural ability of all objects and organisms to emanate heat throug... […]
Global Radiant Heating and Cooling Systems Industry 2018 Market Report; Launched via MarketResearchReports.com
on November 6, 2018 at 6:13 pm
Industry Chain Analysis of Radiant Heating and Cooling Systems, Manufacturing Technology of Radiant Heating and Cooling Systems, Major Manufacturers Analysis of Radiant Heating and Cooling Systems, Gl... […]
New technology set to revolutionise staying cool
on November 3, 2018 at 4:53 am
Known as radiative cooling, it’s a phenomenon with the potential to do ... once said that “any sufficiently advanced technology is indistinguishable from magic”. So far, the promise of metamaterials l... […]
Passive Radiative Cooling Moves Out Of The Lab & Into The Real World
on October 29, 2018 at 3:19 pm
In August of 2017, we brought you news of a new hybrid material that can lower the temperature of a building without the use of electricity, using a process known as passive radiative cooling. […]
Engineers scale up a low-cost, energy saving cooling system
on October 29, 2018 at 6:43 am
The technology, which takes advantage of natural radiative cooling principles, is described today in the journal Joule. “As Earth’s temperature warms due to the absorbed heat from the sunlight during ... […]
Low cost, energy-saving radiative cooling system ready for real-world applications
on October 26, 2018 at 9:32 am
The new research demonstrates how the low-cost hybrid organic-inorganic radiative cooling metamaterial ... of dynamic scheduling to their technology, anticipating that structures such as offices may h... […]
via Bing News