Seems this model need only be viable from a chemistry perspective. Architectural reality is thrown out the ceiling! For the sensor, that really bugs me - there's no sure way to catch rising heat or smoke unless you drape a canopy over the model. The candle will be placed in one of eight rooms, selected at random, right? The hotness and location of the flame is unknown. So the most ingenious trigger fails unless the flame is positioned where you need it.
Well, if the trigger can't function as in a real building (with ceilings), then I suggest a trigger that works just for this demonstration: Rather than tinker room-by-tiny-room, hang a funnel that acts as a chimney, over the entire box. Put an ordinary "hard-wired" (line voltage) heat or smoke detector above the funnel. You can borrow that from any legal dwelling. The detector will have an additional (red) com wire that energizes when fire is detected. This wire can power any old appliance(s) you like for mixing/delivering the suppressant. Like I dunno a coffee grinder, an aquarium pump, anythings.
Sorry if I wasn't clear enough, but there are 8 candles in each of the 8 rooms in the model (so I have to extinguish all eight of them under one minute). I really liked PhDemon's approach to this problem:
In the PM you sent me you say you can't have the acid in the box...
As a cunning plan you could have a conical flask stoppered with a bung and delivery tube outside the box. Now this is the cunning bit
Have the tea bag containing the NaHCO3 in
the flask suspended above the acid, feed the cotton suspending it through the delivery tube and into the box over the candles. If the delivery tube is pointed into the box and you use enough of the reactants you will easily generate enough CO2 to fill the box in under a minute.
I wasn't sure how to start working on my stoichiometry calculations. I feel like I would need to know how much CO2 I'll need to extinguish the flame to get started, but I'm not entirely sure. Ideas?
Also, sorry about using PM. As it was my first post on the forum, I really wasn't sure what to do when I received a response!!
Thanks for everyone's responses!