The thermal actuator delivered a force-to-displacement ratio of 14.5 N/mm, compared with 1.1 N/mm for a commercial electromechanical actuator the researchers used as a reference. The thin films also provide a high surface-to-volume ratio for rapid heat transfer. Under Joule-heated actuation, the integrated device reached a steady 4.0 K temperature span after 20 cycles and a specific cooling power of 4.43 W/g. When driven from the external heat source, those figures fell to 2.2 K and 3.32 W/g, respectively.
This external-heat result is the real proof of concept. While the technology is still an early-stage laboratory experiment, a scaled, perfected version could have interesting implications. Typically, the heat the system needs to operate is generated from electricity or another form of energy. However, an ideal scenario would be to repurpose existing waste heat — a setup already attainable in data centers. Therefore, the technology has the potential to cool processors using the heat they generate!
However, applying it as a data center cooling technology is far from the technology's current state. The prototype produced just 2.09 milliwatts of cooling power at zero temperature lift. That is nowhere near the heat loads of modern processors, much less AI accelerators or data-center racks. The researchers also cite relatively slow actuation, limited strain rate, and the current heat-exchanger geometry among the factors constraining performance. There also needs to be a way to make the heating cyclical.
The team is now working to connect multiple films in parallel to increase cooling capacity. Further progress will require scaling the active material, improving heat transfer and operating frequency, and proving long-term durability. For now, the researchers have demonstrated the underlying energy chain in which heat can be converted into mechanical motion, and that motion can be turned into useful cooling without an electric motor driving the refrigeration cycle.
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Etiido Uko is a news contributor for Tom's Hardware covering the latest updates in big tech and the PC industry. He is a mechanical engineer and senior technical writer with over nine years of experience in documentation and reporting. He is deeply passionate about all things engineering and technology, and is an expert in gadgets, manufacturing, robotics, automotive, and aerospace. ","collapsible":{"enabled":true,"maxHeight":250,"readMoreText":"Read more","readLessText":"Read less"}}), "https://slice.vanilla.futurecdn.net/13-4-25/js/authorBio.js"); } else { console.error('%c FTE ','background: #9306F9; color: #ffffff','no lazy slice hydration function available'); } Etiido Uko Social Links Navigation News Contributor Etiido Uko is a news contributor for Tom's Hardware covering the latest updates in big tech and the PC industry. He is a mechanical engineer and senior technical writer with over nine years of experience in documentation and reporting. He is deeply passionate about all things engineering and technology, and is an expert in gadgets, manufacturing, robotics, automotive, and aerospace.
S58_is_the_goat A team of scientists This is where i stop reading. Reply
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