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{)
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