Greetings, Sorry I'm behind again, catching up from being at Pennsic (and living in a collection of connected traditional ger (yurt)) cooled in the traditional style (open roof vent hole, raise the sides a little, and get a pleasant breeze) quite pleasantly.
A few questions, if I may, On Tue, 2011-08-09 at 19:04 -0700, KK wrote: > Ok...part 2 of the video test is up. > > http://youtu.be/bJXd71ZaWls > > Foam board covering. Model on ground. > > Outside Temp - 100 deg. F What was the inside temp? > Windspeed - 7mph > Sun Intensity - Off the chart! > > Same result. No difference. No reverse air flow downwards. > So, if you are one of the "wee people" living in a tiny hexayurt, > Bucky Fuller is not your friend. > Prepare to sweat. What is the temperature of the smoke? That might effect things, if we are expecting it to rise or fall. What was the expected difference in the vent-size for the roof-vent and the side vents? >From my read of the quote, the top vent should be much smaller than the side vents, not that I think it would make much difference, unless the air in the structure started cooler, or the whole system started cooler, and the outside heated up quite a bit faster than the inside, which might (might, mind you, not would) bring the inside air out, but you would be "cooling" with moving warmer air, pulled in from the top, because the coolest air would be being pulled out of the bottom vents. So, even if the reverse flow worked, you would be moving warmer air, and perceiving the moving warmer air as cooler than the static cooler air, simply because of evaporation, and "any breeze is better than none." I'm still much more enamored at the vacuum pull of heated air up a black pipe, you are still moving warmer air than cooler air, but it is probably much easier to arrange for, and still used the Joule-Thompson effect to "cool" or at least speed the air up in its movement similar to the Venturi effect. The Coanda effect could be used for the redirection of the flow, due to the shape of the pipe, causing more suction up through the pipe. Of course, as a side note, the Bernoulli Principal applies to a liquid or a gas, for it's a fluid, and both follow the rules, see also: http://mitchellscience.com/bernoulli_principle_animation Percy -- You received this message because you are subscribed to the Google Groups "hexayurt" group. To post to this group, send email to hexayurt@googlegroups.com. To unsubscribe from this group, send email to hexayurt+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/hexayurt?hl=en.
