عربي English Türkçe اردو فارسى
Logo
Latest News
Varieties

Saudi Research Tests New Energy-Efficient Cooling System

KAUST's new cooling system
KAUST's new cooling system
TT
TT

Saudi Research Tests New Energy-Efficient Cooling System

KAUST's new cooling system
KAUST's new cooling system

The King Abdullah University of Science and Technology (KAUST) has conducted observational experiments in the houses located inside the campus to create a new cooling system that consumes energy less than the currently used systems.

These experiments aim at testing the efficiency of the new system under different weather conditions in Saudi Arabia.

Air conditioning systems in use today typically achieve only 35–40 percent of the cooling possible for the amount of electricity they consume. As well as their principal task of cooling air, they remove moisture from the air by lowering its temperature to the level at which the water in it condenses. But this double step wastes a lot of energy.

A team led by Kim Choon Ng, professor of Environmental Science and Engineering at KAUST, has now devised a way to reduce the amount of energy consumed by decoupling the two processes.

Instead of dehumidifying air by cooling it, the system uses a more efficient process called adsorption. This binds the water in the air to the surface of a specially developed nanomaterial. Made of calcium chloride salt embedded in a silica gel lattice, this material can adsorb up to 20 times as much water as conventional silica gel in proportion to its weight.

Ng is now testing prototypes, and findings to date show an improvement in efficiency of 30–60 percent over conventional air conditioners. “This new type of air conditioner could offer a much-needed mean to slow down the increasing contribution of cooling systems to climate change,” says Kim Choon Ng.

In this new system, the proprietary adsorbent coats the coils of a mechanical vapor compressor, which cools the air the adsorbent has dehumidified in the manner of a conventional AC system. Air flow through the system is reversed and then reversed again in a period cycle to regenerate the saturated adsorbent.

Global consumption of air conditioning electricity, mainly generated from burning fossil fuels, has risen from 600 TWh in 1990 to 2,200 TWh in 2020, and based on current trends, could reach 6,300 TWh in 2050. By then, half of all electricity used by the world’s hottest countries, including Saudi Arabia, would be used just for keeping people cool.

Most Viewed

 
 
Varieties

Storm Dumps Record Rain in Northern California, While US Northeast Deals with Winter Storms

A pedestrian walks along a flooded street during a storm Thursday, Nov. 21, 2024, in Santa Rosa, Calif. (AP Photo/Jeff Chiu)
A pedestrian walks along a flooded street during a storm Thursday, Nov. 21, 2024, in Santa Rosa, Calif. (AP Photo/Jeff Chiu)
TT
TT

Storm Dumps Record Rain in Northern California, While US Northeast Deals with Winter Storms

A pedestrian walks along a flooded street during a storm Thursday, Nov. 21, 2024, in Santa Rosa, Calif. (AP Photo/Jeff Chiu)
A pedestrian walks along a flooded street during a storm Thursday, Nov. 21, 2024, in Santa Rosa, Calif. (AP Photo/Jeff Chiu)

A major storm dropped more snow and record rain in California, causing small landslides and flooding some streets, while on the opposite side of the country blizzard or winter storm warnings were in effect Saturday for areas spanning from the Northeast to central Appalachia.
The storm on the West Coast arrived in the Pacific Northwest earlier this week, killing two people and knocking out power to hundreds of thousands, mostly in the Seattle area, before its strong winds moved through Northern California, The Associated Press reported.
Santa Rosa, California, saw its wettest three-day period on record with about 12.5 inches (32 centimeters) of rain falling by Friday evening, according to the National Weather Service in the Bay Area.
Flooding closed part of scenic Highway 1, also known as the Pacific Coast Highway, in Mendocino County and there was no estimate for when it would reopen, according to the California Department of Transportation.
On the East Coast, another storm brought much-needed rain to New York and New Jersey, where rare wildfires have raged in recent weeks, and heavy snow to northeastern Pennsylvania. Parts of West Virginia were under a blizzard warning through Saturday morning, with up to 2 feet (61 centimeters) of snow and high winds making travel treacherous.
As residents in the Seattle area headed into the weekend, more than 112,000 people were still without power from this season’s strongest atmospheric river — a long plume of moisture that forms over an ocean and flows through the sky over land. Crews worked to clear streets of downed lines, branches and other debris, while cities opened warming centers so people heading into their fourth day without power could get warm food and plug in their cellphones and other devices.
Gale warnings were issued off Washington, Oregon and California, and high wind warnings were in effect across parts of Northern California and Oregon. There were winter storm warnings for parts of the California Cascades and the Sierra Nevada.
Forecasters predicted that both coasts would begin to see a reprieve from the storms as the system in the northeast moves into eastern Canada and the one in the West heads south.
By Friday night, some relief was already being seen in California, where the sheriff’s office in Humboldt County downgraded evacuation orders to warnings for people near the Eel River after forecasters said the waterway would see moderate but not major flooding.
The system roared ashore on the West Coast on Tuesday as a “ bomb cyclone,” which occurs when a cyclone intensifies rapidly. It unleashed fierce winds that toppled trees onto roads, vehicles and homes.
Debra Campbell said she was sitting in the dark with a flashlight that night, unable to sleep as strong winds lashed her house in Crescent City, California. With a massive boom, a 150-foot (46-meter) tree came crashing down on her home and car.
“It was just so incredibly frightening,” AP quoted Campbell as saying. “Once I realized it wasn’t going to come through the ceiling where I was at, I was able to grab my car keys and my purse. ... And I open the front door and it’s just solid tree.”
In the Northeast, which has been hit by drought, more than 2 inches (5 centimeters) of rain was expected by Saturday morning north of New York City, with snow mixed in at higher elevations.
Despite the mess, the precipitation was expected to help ease drought conditions in a state that has seen an exceptionally dry fall.
“It’s not going to be a drought buster, but it’s definitely going to help when all this melts,” said Bryan Greenblatt, a National Weather Service meteorologist in Binghamton, New York.
Heavy snow fell in northeastern Pennsylvania, including the Pocono Mountains, prompting a raft of school closures. Higher elevations reported up to 17 inches (43 centimeters), with lesser accumulations in valley cities like Scranton and Wilkes-Barre. More than 85,000 customers in 10 counties lost power, and the state transportation department imposed speed restrictions on some highways.