ArticleScience advances2025
Mechanical power generation using Earth's ambient radiation.
Article in Science advances, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
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Authors and funding
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Radiative cooling can be used to passively cool objects below ambient temperature by exhausting heat toward the sky. The emitted power flux may be used to generate electricity, but devices often require low-bandgap or rare-earth materials that are difficult to scale. Here, we demonstrate an alternative approach that generates mechanical power from Earth's ambient radiation using a Stirling engine. Outdoor experiments performed throughout the year show that temperature differences >10°C are sustained during most months, resulting in the generation of >400 milliwatts per square meter of mechanical power with a potential for >6 watts per square meter. We further apply this technique for air circulation, achieving >0.3 meters per second with a potential volumetric flow rate that exceeds 5 cubic feet per minute (cfm), which is sufficient for CO
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.