This webcast looks at this demonstration project (at the International Building Exhibition IBA 2013 in Hamburg, Germany) using algae filled window panes to provide passive solar and active solar. Passive solar is achieved as the algae grow quickly under direct sunlight and thereby produce share for the building. Active solar is achieved by using the biomass of the algae for energy.
The algae use photo synthesis to grow and create biomass. The water also is heated up by the sun and that heat energy is captured to be used also. The algae window panes are moveable in order to provide shade and better capture sunlight.
This is a speculative project. It is interesting to see the various alternatives to reducing our use of un-renewable energy and using design to create livable spaces.
The building currently reduces overall energy needs by 50%, and Wurm says 100% is achievable. Combined with solar panels to power the pumps and heat exchangers, the building could be completely self-sufficient.
Wurm says we’re likely to see the first full-blown commercial applications on data centers, which of course are particularly energy hungry, and require a lot of cooling. That’s another advantage of algae: it provides natural shading as it absorbs sunlight.
It seems up front costs may mean this isn’t economically viable yet. But we need to keep experimenting to find solutions that work. Also, the current failure to properly count for the negative externalities of fossil fuel is something that must change.