Yale engineer to build 'hot' solar cells

Associate professor of electrical engineering Minjoo Larry Lee has been awarded $2,540,000 to develop dual-junction solar cells that can operate efficiently at extreme temperatures above 750 degrees Fahrenheit. In addition ...

Recuperating waste heat under the hood

For his semester project in mechanical engineering, Eliott Guenat studied the best way to recuperate waste heat from a car's engine. The challenge is figuring out how to incorporate the heat exchangers micro-turbomachines.

Clean power from waste heat

Siemens has developed a technology to use waste heat, which previously had gone unused, to generate electricity. The solution employs silicone oils, which have a lower enthalpy of vaporization than water, and is needed because ...

Steam of hot flue gases saves energy at steel mills

A new solution from Siemens takes advantage of hot flue gases from arc furnaces to generate steam. This steam can then be used for other steel mill processes or for generating electricity. In the past, flue gases were usually ...

Whither the teakettle whistle: Breakthrough in breakfast musings

Despite decades of brewing tea in a whistling kettle, the source and mechanism of this siren sound of comfort has never been fully described scientifically. Acknowledging the vibrations made by the build-up of steam escaping ...

How the kettle got its whistle

(Phys.org) —Researchers have finally worked out where the noise that makes kettles whistle actually comes from – a problem which has puzzled scientists for more than 100 years.

Yahoo Japan develops 3D search engine-printer

Yahoo Japan Corp. has developed a voice-activated Internet search that links to a 3D printer, letting users look online for blueprints to deliver solid objects in a few minutes, the company said.

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