Category: Renewable Energy

Hydrogen in the Gas Tank

As the lightest element, hydrogen has a high mass-specific energy storage density of 120 MJ/kg. This corresponds to about three times the storage density of diesel fuel, at 43 MJ/kg, referred to the so-called lower heating value. How­ever, this physically favorable property of hydrogen cannot readily be applied in a technological setting. While an automobile […]

Electric Automobiles

by Andrea Vezzini Electric cars indeed operate emission-free when the pow­er for charging their batteries comes from renewable sources (Figure 1). Even when their power is generated from fossil sources, they show a good C02 balance, since they utilize the electrical energy very efficiently. Our mea­surements at the Bern University of Applied Sciences in Biel, […]

Existing OWC Projects

Between 1978 and 1986, in an international experiment ini­tiated by Japan, an OWC system was tested for the first time on a large scale: The ship Kamai’ carried out three series of tests in the Japan Sea in which turbines with up to a megawatt of power output were installed. Only in 1998 was the […]

And Where will the Hydrogen Come From?

Hydrogen can be produced from a variety of sources. The environmental-political requirement that it be produced from renewable sources limits the choice, and eliminates the current industrial production methods. Possible re- FIG. 2 A FUTURE PIPELINE NETWORK newable energy sources for hydrogen production are wind power and photovoltaics; they would provide power for the production […]