Engineers have developed a passive evaporative cooling membrane that dramatically improves warmth removing for electronics and knowledge facilities
Engineers on the College of California San Diego have created an modern cooling system designed to vastly improve the power effectivity of knowledge facilities and high-performance digital units. This new method depends on a specifically engineered fiber membrane that naturally removes warmth by way of evaporation. It offers an efficient and energy-saving various to traditional cooling strategies comparable to followers, warmth sinks, and liquid pumps, whereas additionally doubtlessly lowering the big quantities of water utilized by many present techniques.
The breakthrough is described intimately in a research printed within the journal Joule.
As synthetic intelligence (AI) and cloud computing proceed to develop, so does the demand for knowledge processing, and the warmth that accompanies it. Cooling now represents as a lot as 40% of an information heart’s complete power consumption. If present development continues, world power demand for cooling might greater than double by 2030.
The newly developed evaporative cooling system could assist gradual this pattern. It operates utilizing a cheap fiber membrane made up of numerous interconnected microscopic pores that draw cooling liquid throughout its floor by way of capillary motion. When the liquid evaporates, it removes warmth from the underlying electronics with out the necessity for extra power. The membrane is positioned above microchannels that offer the liquid, permitting warmth to dissipate effectively from the parts under.
Harnessing Evaporation for Environment friendly Warmth Dissipation
“In comparison with conventional air or liquid cooling, evaporation can dissipate greater warmth flux whereas utilizing much less power,” mentioned Renkun Chen, professor within the Division of Mechanical and Aerospace Engineering on the UC San Diego Jacobs College of Engineering, who co-led the undertaking with professors Shengqiang Cai and Abhishek Saha, each from the identical division. Mechanical and aerospace engineering Ph.D. scholar Tianshi Feng and postdoctoral researcher Yu Pei, each members of Chen’s analysis group, are co-first authors on the research.
Many purposes presently depend on evaporation for cooling. Warmth pipes in laptops and evaporators in air conditioners are some examples, defined Chen. However making use of it successfully to high-power electronics has been a problem.
Earlier makes an attempt utilizing porous membranes—which have massive floor areas preferrred for evaporation—failed as a result of the pores have been typically both too small, inflicting clogging, or too massive, resulting in undesirable boiling.
“Right here, we use porous fiber membranes with interconnected pores with the suitable measurement,” mentioned Chen. This design achieves environment friendly evaporation with out these downsides.
Report-Breaking Efficiency and Future Potential
When examined throughout variable warmth fluxes, the membrane achieved record-breaking efficiency. It managed warmth fluxes exceeding 800 watts of warmth per sq. centimeter—one of many highest ranges ever recorded for this sort of cooling system. It additionally proved secure over a number of hours of operation.
“This success showcases the potential of reimagining supplies for fully new purposes,” mentioned Chen. “These fiber membranes have been initially designed for filtration, and nobody had beforehand explored their use in evaporation. We acknowledged that their distinctive structural traits—interconnected pores and simply the suitable pore measurement—might make them preferrred for environment friendly evaporative cooling. What stunned us was that, with the suitable mechanical reinforcement, they not solely withstood the excessive warmth flux–they carried out extraordinarily properly beneath it.”
Whereas the present outcomes are promising, Chen says the know-how continues to be working properly under its theoretical restrict. The workforce is now working to refine the membrane and optimize efficiency. Subsequent steps embody integrating it into prototypes of chilly plates, that are flat parts that connect to chips like CPUs and GPUs to dissipate warmth. The workforce can be launching a startup firm to commercialize the know-how.
Reference: “Excessive-flux and secure thin-film evaporation from fiber membranes with interconnected pores” by Tianshi Feng, Yu Pei, Haowen Zhang, Brooklyn Asai, Gaoweiang Dong, Atharva Joshi, Abhishek Saha, Shengqiang Cai and Renkun Chen, 13 June 2025, Joule.
DOI: 10.1016/j.joule.2025.101975
This analysis was supported by the Nationwide Science Basis (grants CMMI-1762560 and DMR-2005181). The work was carried out partially on the San Diego Nanotechnology Infrastructure (SDNI) at UC San Diego, a member of the Nationwide Nanotechnology Coordinated Infrastructure, which is supported by the Nationwide Science Basis (grant ECCS-2025752).
Disclosures: A patent associated to this work was filed by the Regents of the College of California (PCT Software No. PCT/US24/46923.). The authors declare that they haven’t any different competing pursuits.
