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Current issue

ELEKTRO 10/2016 was released on September 27th 2016. Its digital version will be available on October 27th 2016.


Topic: 22nd International trade fair ELO SYS 2016; Electrical Power Engineering; RES; Emergency Power Units


Main Article

Power system management under utilization of Smart Grid system

Printed edition of SVĚTLO (Light) 5/2016 was released on September 19th 2016. Its digital version will be available immediately.


Standards, regulations and recommendations

Regulation No 10/2016 (Prague building code) from the view of building lighting technology


Lighting installations

PROLICHT CZECH – supplier of lighting for new SAP offices

Hold up the light to see in work your work

Modern and saving LED lifting of swimming pool hall

Thermoelectric silicon material reaches record-low thermal conductivity

05.10.2016 | Phys.org | www.phys.org

Researchers have theoretically demonstrated the lowest rate of heat transfer, or thermal conductivity, in any silicon-based material developed so far.

The new material, which is a polycrystalline silicon nanowire, breaks two limits: the Casimir limit and the amorphous limit. The Casimir limit is a theory that describes the thermal conductivity of nanostructures, and breaking it means that the thermal conductivity of the new material is lower than the value predicted by Casimir limit theory.

New thermoelectric material

The amorphous limit is regarded as the lowest thermal conductivity of a material, since amorphous structures strongly scatter heat carriers. However, due to its unique nanoscale design, the polycrystalline silicon nanowire has a thermal conductivity that is three times lower than that of amorphous silicon materials.

The researchers expect that the new material could be especially useful for thermoelectric applications. By converting heat energy into electricity, thermoelectric materials provide a way to capture some of the waste heat emitted by vehicle tailpipes, power plants, and manufacturing facilities, and then convert the heat into useful energy.

Read more at Phys.org

Image Credit: Adobe Stock