"Jason" <[EMAIL PROTECTED]> posted: <snip> > P.S. for a look at another of my ideas to fight air pollution go here > http://homepage.urbanet.ch/scaf/pages/flat_tab_medium_indexpag.html >
Fascinating. You have even built a concrete prototype - marvellous! I have found solar towers / chimneys fascinating for some time myself. Interesting application. I trust the filters are at the base to facilitate changing them, and they are a consumable. Are re-usable types available, feasible? They look a bit like HEPA filters, but it sounds like the ones you are using have even more filtering capabilities than those. Why not go with a pure passive design, rather than dealing with the expense of conventional PV or the titanium paste type you describe? If the heated air creates enough draw (convection air flow) to pull air across the filters, isn't that sufficient? Can you increase the solar heating effect by using a matte black bottom surface, and possibly some reflective material on the side of the units away from the sun? Or is the aesthetic of being able to see through the glass more important? What are you using for the glazing? Tempered glass? Will there be acceptance issues with a device that creates additional heat (even from solar gain) in urban environments on hot days? (Potential for increasing air conditioning demand in the local area?) I do appreciate the research you have done on thermal degradation of conventional PV, and your solution for the issue. I'll tuck that away for future reference. How big do these units need to be to be practical? I gather the prototype is smaller than what you intend in real use. How aabout the potential for using this sort of structure as a roof for kiosks or open-air cafés, providing shade for people while also cleaning the air. I wonder about the placement in urban areas, where unobstructed views of the sun at ground level or near ground level are rare. No doubt you have already considered that - just wondering how you have resolved the issue. Neat. Darryl McMahon -- Darryl McMahon http://www.econogics.com/ It's your planet. If you won't look after it, who will? _______________________________________________ Biofuel mailing list Biofuel@sustainablelists.org http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): http://www.mail-archive.com/biofuel@sustainablelists.org/
