Tag Archives: Electrical generator

Optimizing Thermoelectric Energy Generation

By Elizabeth Montalbano – Deriving energy from the heat electronic devices emit so they can provide their own sustainable sources of power is a Holy Grail for scientists developing power sources for sensors that will drive the future of healthcare devices as well as the Internet of Things.

Researchers in Japan now have come up with a new thermoelectric generator that can convert temperature differences to electricity can be used to power small, flexible devices.

Scientists at Osaka University developed the device in the form of a bismuth telluride semiconductor on a thin, polymer film that weighs less than a paperclip and smaller than the size of an adult fingernail.

However, packed in the tiny device is a maximum output power density of 185 milliwatts per square centimeter, which “meets standard specifications for portable and wearable sensors,” Tohru Sugahara, an associate professor at the university’s Institute of Scientific and Industrial Research, in a press statement. more>

Building Your Own 20kW Hydroelectric Power Plant

By Joel Froese – The only requirement to generate electricity is access to a stream with a two-foot drop in water level and two gallons of flow per minute. A hydroelectric system isn’t overly complicated, isn’t difficult to operate and maintain, has longevity, and is often more cost-effective than any other form of renewable power.

The hydroelectric system is powered by water draining from the lake that flows through a turbine, which drives three generators via a belt and pulley system. The generators are three Baldor Electric model L1177T 15hp single-phase induction motors. Driving an induction motor at higher than normal speed generates electricity. more> http://twurl.nl/y7gyb8