Sorry for the double post again. When I mistakenly double click the reply box it automatically sends before I get to write anything.
Even if the .5 psi differential is real, the losses due to friction in 250 miles of duct would be overwhelming. Decades ago I was doing draft calcs for fossil fueled power stations. Typically you would need a set of forced draft fans and a set of induced draft fans to get a flow thru the boiler with the boiler operating at a slight negative pressure to prevent smoke and dust from polluting the inside of the building. This amounted to a few hundred feet of ductwork with velocities in the 50 to 60 mph range. Typical pressures developed by these fans were over 20 inches of water. Since one psi is approximately equal to two feet of water, it follows that the FD and ID fans in series are developing two psi to produce 60 mph air velocity thru perhaps 500 feet of ductwork and boiler equipment. Some of these fans are the size of small houses and consume tremendous amounts of power to perform their function. Although I have not done calculations, I estimate that .5 psi pushing air thru 250 mi of 10 ft dia pipe would produce a velocity so low that you may need a feather to detect any air motion. Further consideration of this differential scheme does not seem warrented. Jeff ----- Original Message ----- From: "OrionWorks" <[EMAIL PROTECTED]> To: <vortex-l@eskimo.com> Cc: <[EMAIL PROTECTED]> Sent: Friday, October 28, 2005 10:06 AM Subject: Re; deriving Power from Atmospheric PD > From: RC Macaulay > > > John Coviello wrote.. > > > For example, studying five years of atmospheric readings from > > Flagstaff and Tucson, Arizona, with an elevation difference of > > 3,700 feet, separated by 250 miles, they found the pressure > > difference to be in the range of 0.5 to 0.7 psi (pounds per > > square inch) on a daily basis, never going below 0.5 psi. > > ... > > > Terminal velocity of standard air can be reached at near 5 psid. > > Calculating an air flow through a 2.5 meter diameter pipe, 250 > > mile long at a flow of 2500 miles per hour give me a headache > > and a big question mark??? Anyone at the patent office notice > > what the head loss would be ?? How about the weight of air at > > respective elevations ?? Hmmm. Rube Goldberg would love it. > > > > Richard > > Wait a minute! > > Unless I've completely misread something critical (The technology page is extreemly sparse) it seems to me that a key point completely missing from the equation is the fact that the pressure difference between Flagstaff and Tucson is (I suspect) primarily DUE to the fact that there is a 3,700 feet difference in altitude between the two cities. Lower elevation will naturally have a denser atmosphere, translating to higher pressure. If my some magic both cities could be stacked vertically one on top of the other where one remained 3,700 feet higher in elevation the psi pressure difference between the two cities would likely STILL be, I would imagine, around 0.5 psi. > > So what. That doesn't mean energy can be extracted from the psi difference. > > There is no way to take advantage of an altitude difference in pressure differences. The combination of accumulated atmospheric mass and gravity generate the atmospheric pressures between the different altitudes as a way to EQUALIZE stored energy in the form of atmospheric pressure. There is no (stored) inherent energy that can be extracted from such a scenario. Said differently: Seems to me that the only way one could take advantage of different psi atmospheric values would be if both city locations were situated at the exact same ALTITUDE while still maintaining a diference in psi levels. They clearly are not! > > If this scenario were possible it seems to me that a long time ago there would have been generators constructed up on top of high elevation mountains with wind pipes traveling all the way down to the base to take advantagea of the difference in psi pressures. > > The web site, at first glance looks very professional. I think it's a clever joke. > > If anyone knows more on this subject please speak up! > > Regards, > Steven Vincent Johnson > www.OrionWorks.com > >
