Dear David and all Typically there is a flare in parallel with the engine, a valve choosing which. On startup the poor gas, getting better is flared. When the gas turns to a nice lilac color, it's time to turn the valve to engine which typically has been warming up on gasoline/diesel.
Tom Reed Thomas B Reed 280 Hardwick Rd Barre, MA 01005 508 353 7841 On Dec 10, 2012, at 4:57 PM, "David G. LeVine" <[email protected]> wrote: > On 12/10/2012 02:44 PM, jim mason wrote: >> the problem is typical operation is variable. during start up you always go >> through a stoich point as you move air out of the system and progressively >> make gas. even if you leave the system full of gas on shut down, start up >> in the reactor can pass lots of air until things get up to temp again. this >> can easily result in a combustible mixture in the system. >> >> we've found this to be a fairly significant operational reality that needs >> to be addressed for regular users. similar for the impact of backfires from >> the engine igniting the intake stream. while things are "usually" ok, the >> marginal events can be quite, umm, compelling . . . we've started adding >> more pressure relief points where typically not needed to cover these >> outliers. we're also looking to add a flame arrestor right at the manifold >> to prevent backfires propagating. > > Would a flame arrestor (basically a couple of layers of copper screen or a > layer of copper wool) just before the ESP be sufficient to prevent > propagation into the rest of the system? All that needs is a pressure relief > in the ESP for when there is a "marginal event". If the throttle is before > the ESP, not even a pop-off would be needed, but the volume sounds like it > would be a bit too large that way. > > Dave 8{) > > -- > > "The first method for estimating the intelligence of a ruler is to look at > the men he has around him." > Niccolo Machiavelli > > NOTE TO ALL: > > When forwarding emails, please use only "Blind Carbon Copy" or "Bcc" for all > recipients. Please "delete" or "highlight & cut" any forwarding history which > includes my email address! It is a courtesy to me and others who may not wish > to have their email addresses sent all over the world! Erasing the history > helps prevent Spammers from mining addresses and viruses from being > propagated. > > THANK YOU! > _______________________________________________ > 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/ _______________________________________________ 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/
