Jones; Yes hope someone will offer a good and acceptable method that can be dome in a small lab, but I have some 'Don't' for those that might not have yet suffered an accident.
1) A bubbler is not sufficient and should be followed by dryers. 2) The flame front of H2 is so fast that flame arrestors are critical (ones certified for H2). 2b) Problem is that you will have to run at a pressure to get the gas through the arrestor. 2c) Some YouTubes claim to use check valves, ;-) 3) The gas should be buffered by an interim (albeit) small (depending of L/min output) storage that is arrestor protected. 4) Small nozzle (orifice) size able to withstand the heat. 5) Care must be taken in the flame is hard to see (if clean gas) is used. 6) Don't mix plumbing metals. I have had the common duct gas catalyzed by stainless screens mounted in brass fittings. 7) Stainless screens are not enough to act as a flame arrestor, many amateurs place random screens at different location within the plumbing system to feel fuzzy. It only bites back. I'm sure you and most vorts know these givens, but I learn quickly through tough love. -----Original Message----- From: Jones Beene [mailto:[EMAIL PROTECTED] Sent: Friday, August 31, 2007 8:52 AM To: [email protected] Subject: Re: [Vo]:interesting developments Stiffler Scientific wrote: .... gas burning in calorimeter to determine actual output/input. Speaking of burning a "common manifold" potentially explosive gas (BG or equivalent), does anyone have, or care to expound-on, an accurate protocol for such a setup? Obviously, one must use care to avoid pre-ignition. A "bubbler" is often used. But, assuming a safe steady flame is obtainable, what is the most accurate method from there on? Is there a method that skeptics cannot reasonably fault? The obvious reason that an accurate protocol needs to be in place is that there are literally dozens of "aqua-fuel" generators, "Brown's Gas" welders, and "hydrogen-booster" devices, vocal proponents and add-on kits, and so forth on the internet. Many of these will produce lots of gas in the form of super-saturated steam (75% water vapor) which will not even ignite. ERGO - there needs to be a totally accurate (bullet-proof) gas burning calorimetry protocol out there to use as a yardstick, correct ? Jones
