It works well on curved surfaces.
Researchers have been trying to figure out how to use temperature variations to generate power for a long time. Now, a team of scientists from Penn State and the National Renewable Energy Laboratory has invented a new flexible thermoelectric generator that wraps around hot surfaces like exhaust pipes to transform waste heat into power.
"A huge portion of the heat generated by the energy we consume is effectively wasted, typically distributed directly into the atmosphere. We haven't found a cost-effective solution to trap and transform that heat into usable energy using conformal forms. Shashank Priya, associate vice president for research and professor of materials science and engineering at Penn State, said, "This finding unlocks that door."
These adaptable devices, on the other hand, are extremely compatible with waste heat sources such pipes in industrial and residential structures, as well as vehicle exhaust pipes. Furthermore, unlike earlier rigid devices, they do not need to be fastened to surfaces, and as a result, these qualifications highlight the flexibility of the flexible device. When the thermoelectric generator is put near a heat source, electrons travelling from the hot to the cold side produce an electric current. The gadget is flat and square in design, and it is made up of small two-leg string pairs that are connected to each other. There are gaps between the strips, allowing them to fit around curved structures like pipelines. The gaps also allow the device to change its fill factor, which can be utilized to optimize thermoelectric devices for various heat sources.
According to the experts' reports, the device passed its testing stage with a 150 percent higher power density than other state-of-the-art units. A scaled-up version that was little over 3-inches squared, on the other hand, retained a power density advantage of 115 percent. When placed on the heated surface, this version produced a total power output of 56.6 watts, according to the researchers.
"Imagine an industrial power facility with hundreds of feet of pipelines. If you can wrap these devices around a large enough area, you could generate kilowatts of energy from heat that would otherwise be squandered. "You might be able to turn squandered heat into something beneficial," Priya added. Of course, there are benefits to the design. For starters, it makes it easier to make optimal use of heat that might otherwise be wasted. Second, the device's structure makes it compatible with difficult-to-apply surfaces like pipelines, which is impressive. As a result, this idea holds promise for generating electricity from hitherto inaccessible places.
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