Power and Electrical Engineering

The power for Hubble’s scientific discoveries comes from solar cells. Designing and constructing Hubble’s first two sets of solar cell arrays constituted a huge technological achievement for the European Space Agency and European industry. After an in-orbit life of more than 8 years, this example of pioneering space technology was this morning (European time) replaced by new, more powerful arrays.

For the last week a dedicated team of engineers, technicians and scientists from the European

European research co-ordinated by TU Delft
Offshore wind technology ready for application

The technology for the construction and operation of offshore windfarms is ready for large-scale application. Companies in the fields of engineering and services are preparing to take part. This can be seen in the conclusions of the project Concerted Action on Offshore Wind Energy in Europe (CA-OWEE) of the European Union, in which seventeen parties from thirteen European countries have brou

The days of fast-fading cellular phone batteries may soon be over. Researchers at the Lawrence Livermore National Laboratory (LLNL) recently developed a working prototype for a portable fuel cell energy source that could power a cellular phone 300 percent longer than existing rechargeable batteries do. Indeed, the new technology would be less expensive, smaller and more powerful than any battery currently in use, according to Jeff Morse of LLNL’s Center for Microtechnology Engineering. He predic

Carbon nanotubes assemble themselves into electronic grids

Tiny electrical circuits with a single molecule for each wire have been created in the United States 1 . These grids could replace silicon chips, making computers and memory devices much more compact and powerful than they are today.

The grids comprise carbon nanotubes – long, hollow cylinders of pure carbon a few millionths of a millimetre (nanometres) across and several thousand nanometres long. Dep

A quantum afterburner extracts laser light from vehicle exhaust.

The hot gases belching out of your car’s exhaust are not just useless waste. They are a laser waiting to happen, says physicist Marlan Scully1.

All you need to harness this potential, suggests Scully, of Texas A&M University in College Station, is a quantum afterburner. This hypothetical modification would use quantum mechanics to boost the engine’s efficiency by clawing back waste heat and turning it

Like silicon, silicon carbide is semiconductor and in some aspects, its characteristics are even better. Electrical strength of silicon carbide is ten times higher than that of silicon, heat conductivity is three times higher. Crystals of silicon carbide are almost perfect for power electronics. They can work at high current density (more than 10 kA per square centimeter) and voltage up to 4.5 kV, unachievable for silicon. Moreover, charge-drift velocity is twice higher in silicon carbide providing b