Derek, Bruce, and list. Derek, yes, sorry, the inference is of resonant frequencies, and yes, the short vs. longer wavelengths of light, however, resonance, is still resonance, surface or full finger (board, what have-you. What changes the properties of our body compared to say a drumstick or a coup of coffee, is that short spectrum (fast) waves need to be focused to have an impact on a said mass (laser light for example), even a microwave is "focused" to some extent (it heats better in the middle of the chamber, than say the edges or corners).
Short wavelengths pass AROUND mass much easier than longer wavelengths (bass notes of the neighborhood teen's cars, boom, boom, boom) these tend to cause the entire car to shake, simply because the blocking effect of the cars mass, where-as the high notes, do NOT need a lot of power to be deafening to us (this is EAR issues of sensitivity, NOT that the high notes are more powerful or anything). HOWEVER, because higher wavelengths pass in air very easy, we use this effect to our advantage, (cell phones, radio, wireless internet, etc.) these waves however, do NOT pass solids well, but lower note have more energy (watt for watt) Example, one watt of say, 80 Hz will excite a board, much more intently than one watt of 3000 Hz. This same effect happens with "red" (IR) heat, vs, "blue" (UV) the red heat has the ability to excite our body mass (and most other forms of mass) much easier than UV heat. the effect is NOT limited to just water content, but I do agree that shinny tinfoil reflects IR heat MUCH better than dull tin. In fact, I am using tinfoil in an above grade (bottom open to air) radiant floor heating system in our guest house, the tinfoil is sandwiched between to layers of insulation below the floor (in the joists) and trust me.... it made a HUGE difference. Greg Greg -----Original Message----- From: [email protected] [mailto:[email protected]]on Behalf Of derek schulze Sent: Friday, December 17, 2010 7:47 AM To: Discussion of biomass pyrolysis and gasification Subject: Re: [Gasification] heat transfer properties.... I doubt very much that iron could act as a catalyst (in the pure sense of the word) as a catalyst is not supposed to participate in the reaction only facilitate it. Iron will quickly oxidize (give up electrons) and in the words of Harry Potter "Disapparate". As for different wavelengths and I presume resonance frequencies is what was being referred to, our bodies as we should all know have a rather large component of water in them (yes even in skin). What is likely more applicable with regard to your superhero hand is that shorter wavelengths (blue) are more likely to reflect (scatter) from the surface of your skin while longer wavelengths are more likely to penetrate the surface (perhaps only a millimeter). What you feel is quite different from what energy might be present. The trick is in absorbing that energy - enter the debate of shinny side tinfoil - sorry I'm kidding... As for iron and its effect - although not technically catalytic it might have a desired effect of thermal storage in the reactive zone (red hot) which could enhance conversion, but I would suspect material blockage etc... Just how much it would help I'm not sure. -Derek Schulze On Wed, Dec 15, 2010 at 9:36 PM, Bruce Jackson <[email protected]> wrote: > Before I forget this yet again... > > Is it possible that the zone that produces heat, needs a catalyst like > iron? > My uninformed opinon (without reviewing my heat transfer tomes) would be > that > the gas is invisible to the infrared component. I suspect the gas is only > picking up heat from conduction. I don't know the percentages of which > components are domainant (thats the home work part), but if the IR > component is > significant, then its being lost on the gas. This especially if the ash is > what > the gas impinges on. > This idea occurs to me from watching the fires. I can hold my hand in the > flames but I can't hold it near the coals because I am picking up too much > IR. > BPJ > > > > _______________________________________________ > The Gasification list has moved to > [email protected] - please update your email contacts to > reflect the change. > Please visit http://info.bioenergylists.org for more news on the list > move. > Thank you, > Gasification Administrator > _______________________________________________ The Gasification list has moved to [email protected] - please update your email contacts to reflect the change. Please visit http://info.bioenergylists.org for more news on the list move. Thank you, Gasification Administrator ----- No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1170 / Virus Database: 426/3320 - Release Date: 12/16/10 _______________________________________________ The Gasification list has moved to [email protected] - please update your email contacts to reflect the change. Please visit http://info.bioenergylists.org for more news on the list move. Thank you, Gasification Administrator
