Engineers at the University of California, Davis, have created a device capable of producing mechanical energy at night by taking advantage of the warmth near the ground and the extreme cold of outer space. This approach could support practical uses such as moving air through greenhouses or other structures.
The device is based on a Stirling engine, a type of machine that operates using temperature differences. According to Professor Jeremy Munday — co-author of the study — many engines require a large temperature gap to generate power, but a Stirling engine can run with only a small temperature contrast, similar to the difference between a hot cup of coffee and the surrounding air. Read more →
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