In a region where summer temperatures can push survival itself to the edge, researchers in Saudi Arabia are testing something that sounds almost counterintuitive.
A cooling system that does not need electricity.
Scientists at King Abdullah University of Science and Technology (KAUST) have developed a system called NESCOD, short for No Electricity and Sustainable Cooling on Demand, designed to reduce temperatures without relying on conventional air conditioning.
At the core of the system is a chemical process that absorbs heat during operation, creating a cooling effect without compressors, fans, or continuous electrical power. In simple terms, the cooling happens through a reaction rather than a machine running on electricity.
According to the report, early tests showed the system can drop temperatures from around 25°C to as low as 3.6°C within about 20 minutes under controlled conditions.
The researchers say NESCOD works through a cycle that can be regenerated using solar energy, allowing the system to be reused repeatedly without being plugged into the grid.
One of the KAUST researchers described the goal as building cooling that can work “on demand” in places where electricity is limited or too expensive to rely on constantly. That focus is especially important in regions facing extreme heat and weak infrastructure.
The system uses a salt based reaction involving ammonium nitrate and water, which absorbs heat as it dissolves, lowering surrounding temperatures in the process.
What makes this development stand out is not just the chemistry, but the context around it.
Global cooling demand is rising sharply as heatwaves become more frequent and longer lasting, putting pressure on electricity grids and increasing energy costs in many countries.
In rural or off grid communities, the problem is even more direct. Cooling is not just comfort, it can be critical for food storage, medicine preservation, and basic living conditions.
Still, researchers caution that the system is at an early stage. It is not yet a commercial product, and details about large scale deployment remain unclear.
There are also practical questions that remain open, including how long cooling can be sustained in real world environments and how the system performs outside controlled laboratory settings.
But the direction of research is clear.
Instead of relying only on machines that consume electricity, scientists are now exploring ways to make cooling itself part of the chemistry of materials and natural energy cycles.
If scaled successfully, systems like NESCOD could reduce dependence on traditional air conditioning in some environments and reshape how cooling is approached in regions facing extreme heat.
For now, it remains an experimental step forward, but one that points to a different kind of future for thermal comfort, especially in places where electricity is not always guaranteed.
About the Author
Marcel Chidozie is a tech analyst and writer covering foreign news, fintech, and emerging technologies at TechRegard. Based in Nigeria, He's passionate about translating complex tech developments into compelling, accessible stories for diverse audiences. His work focuses on how technology shapes innovation across Africa and globally.
