On Tue, 17 Jul 2012 05:49:17 -0500, Greg wrote in message <CAH4eSNoqVwAv+sFiF4=SBtjJaNBP0=ueb4ujt_2enzc92fq...@mail.gmail.com>:
> Greetings Thomas, and all. > > Here truly is the question, > > "Heating value" compared to "engine value". > > I don't own fancy test equipment (other than a digital K type > thermometer and pitot tube, hand full of In/WC gauges and a flow > gauge), so this is based on speculation and observation. > > .It's my understanding that the "real" heating value is in the > charcoal, and not the "flames" ..assuming e.g. wood in a wood stove, roughly 3/4 of the heat comes from the IR portion of those visibly yellow tar vapor flames burning, and the remainder 1/6 or so comes from the IR portion of the charcoal burning. _Very_ little heat in the visible or UV part of the spectrum. > I'm speaking from the standpoint of > "warming you to the core" the way a wood stove does, even though you > cannot see the flames, the infrared portion of the heating value from > the glowing charcoal, passes through the walls of the stove, where as > the flames lower light (slower light frequencies) in the visible > portion of the spectrum are less energetic and only heat the air > inside the wood stove itself (causing the chimney effect within the > chimney, through stratification of the said air). > > With that said, does anyone know if my assumption is even somewhat > correct ? or am I off on my normal "tangent" of thinking ? ..get 2 cheap web cameras, unscrew the lens of one, remove the IR blocking filter from the lens (and optionally fit a "black" IR pass filter to block visible light), refit the lens, and refocus it to get a sharp image. ..leave the other web cam as is, plug in both and _compare_. ;o) ..if you have an IR thermometer handy, you can "calibrate" your IR camera's IR light response, most web camera sensors will see IR heat glow down to 1000nm-1200nm or down into the 350-250 degrees Celsius range. ..another thing you'll find, is IR cameras are _easily_ blinded by the IR light from normal gasifier operations, so test with e.g. common wood stoves first. ;o) -- ..med vennlig hilsen = with Kind Regards from Arnt Karlsen ...with a number of polar bear hunters in his ancestry... Scenarios always come in sets of three: best case, worst case, and just in case. _______________________________________________ Gasification mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org for more Gasifiers, News and Information see our web site: http://gasifiers.bioenergylists.org/
