Cidetec Technology Centre’s Energy Department has designed a prototype for a motorised bicycle that works off fuel cells. The project, financed by the Gipuzkoa Provincial Government, involved using a bicycle kindly provided by the ORBEA bicycle manufacturing company and the pedalling action of which is assisted by a motor. The novelty lies in that the battery power source for the motor is substituted by a fuel cell which, for its operation, only needs oxygen from the air and hydrogen contained under pressure in a small tank.
The fuel cell employed is of the PEMFC (polymer electrolyte membrane fuel cell) type, a technology considered to be cutting edge in this field. The fuel cell is, in reality, a series of numerous MEAs (membrane-electrode assembly) layered one on top of each other in order to reach useful power values, given that the voltage generated by each MEA is less than 1 V.
Each MEA is made up of an anodic electrode, where hydrogen molecules break up into protons and electrons. The membrane used enables the passage of protons, but not electrons, thus obliging the latter to travel around an exterior electric circuit made up of the equipment itself that is being supplied with power. Finally, at the cathodic electrode, the electrons recombine with oxygen from air, thus producing water. This involves an electrochemical reaction that does not generate any contaminating waste; there is, thus, no combustion.
Irati Kortabitarte | alfa
System draws power from daily temperature swings
16.02.2018 | Massachusetts Institute of Technology
Researchers at Kiel University develop extremely sensitive sensor system for magnetic fields
15.02.2018 | Christian-Albrechts-Universität zu Kiel
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters
Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...
Let’s say the armrest is broken in your vintage car. As things stand, you would need a lot of luck and persistence to find the right spare part. But in the world of Industrie 4.0 and production with batch sizes of one, you can simply scan the armrest and print it out. This is made possible by the first ever 3D scanner capable of working autonomously and in real time. The autonomous scanning system will be on display at the Hannover Messe Preview on February 6 and at the Hannover Messe proper from April 23 to 27, 2018 (Hall 6, Booth A30).
Part of the charm of vintage cars is that they stopped making them long ago, so it is special when you do see one out on the roads. If something breaks or...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
16.02.2018 | Information Technology
16.02.2018 | Health and Medicine
16.02.2018 | Physics and Astronomy