Solar energy and wind energy seem well on their way to making a substantial contribution to our energy supply. The main problem is that apparently wind and sun can only be converted into electricity, which is difficult to store: batteries are expensive, wear out quickly and are very bulky. A nice solution would be the following: converting the solar or wind energy into “artificial oil” or some other substance that can be easily transported and stored and also efficiently converted into heat, light, movement or electricity. For some reason this apparently does not work in an energy-efficient and cost-efficient way. Is there a fundamental reason for that?
Answer
Dear Koen
There are two other options: converting electricity into hydrogen via electrolysis or pumping up water. Hydrogen can be distributed via the existing gas pipeline network and pumped up water can be used to drive turbines (this is hydroelectricity). Electrolysis does not have a great efficiency, the hydroelectric way has a better efficiency. Hydra-electricity is limited in Belgium, but international cooperation would be required for this.
Answered by
Prof Lambert Stals
Physics
Agoralaan University Campus Building D BE-3590 Diepenbeek
http://www.uhasselt.be/
.