Heating, insulation, ventilation, VMC, cooling ...We escaped beautiful, finally, my wife especially!

Heating, insulation, ventilation, VMC, cooling ... short thermal comfort. Insulation, wood energy, heat pumps but also electricity, gas or oil, VMC ... Help in choosing and implementation, problem solving, optimization, tips and tricks ...
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GuyGadebois
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We escaped beautiful, finally, my wife especially!

Unread Messageby GuyGadebois » 23/03/20, 17:53

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My wife had just loaded the stove with nut shells to have some logs taken. It was then that the gas and smoke accumulated in it caught fire, well no, literally exploded in a deafening noise! The door opened on pressure, deforming the lock that closed it. If the latter had been made of hardened steel instead of mild steel, I dare not imagine the result. She was standing right in front. Fortunately, the glass did not break, it would have been minced ...
Like what, heating with wood is not without dangers!
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Re: We escaped beautiful, finally, my wife especially!

Unread Messageby Christophe » 23/03/20, 18:24

This often happens to me when I load cardboard boxes or paper with my stove already hot ... explosion ... after x minutes ... it's not systematic but I must have ten a year ...

Mine is a classic model very heavy cast iron (140 kg jcrois) therefore impossible to open the door ...
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Re: We escaped beautiful, finally, my wife especially!

Unread Messageby Christophe » 23/03/20, 18:25

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Re: We escaped beautiful, finally, my wife especially!

Unread Messageby Janic » 23/03/20, 18:33

Like what, heating with wood is not without dangers!
do not let children play with fire! : Cheesy: : Cheesy:
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Re: We escaped beautiful, finally, my wife especially!

Unread Messageby sicetaitsimple » 23/03/20, 18:34

GuyGadebois wrote:My wife had just loaded the stove with nut shells to have some logs taken. It was then that the gas and smoke accumulated in it caught fire, well no, literally exploded ....


Christophe just mentioned it, but that's the question I wanted to ask: was the stove still hot, possibly with some residual embers, or was it completely cold?
It happened to me once from a "still warm" state, but without major consequences.
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Re: We escaped beautiful, finally, my wife especially!

Unread Messageby GuyGadebois » 23/03/20, 19:02

sicetaitsimple wrote:
GuyGadebois wrote:My wife had just loaded the stove with nut shells to have some logs taken. It was then that the gas and smoke accumulated in it caught fire, well no, literally exploded ....


Christophe just mentioned it, but that's the question I wanted to ask: was the stove still hot, possibly with some residual embers, or was it completely cold?
It happened to me once from a "still warm" state, but without major consequences.

Residual embers, stove not very hot. I think that what was left of the nut pieces in the hulls created a "fatty" gas and that the saturation of the hearth and the duct created a draft of air causing the explosion. But pushpin, it was impressive. The cats did not come back (literally).
The pin on this lock was completely bent!
stuv-30-30in-bolt-glass-door-and-full-14997090-1.jpeg
stuv-30-30in-lock-glass-door-and-full-14997090-1.jpeg (22.17 KB) Viewed 821 times
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Re: We escaped beautiful, finally, my wife especially!

Unread Messageby Adrien (ex-nico239) » 23/03/20, 19:12

I have never had this phenomenon .... but it must be indeed impressive.
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Re: We escaped beautiful, finally, my wife especially!

Unread Messageby sicetaitsimple » 23/03/20, 19:33

GuyGadebois wrote:Residual embers, stove not very hot. I think that what was left of the nut pieces in the hulls created a "fatty" gas and that the saturation of the hearth and the duct created a draft of air causing the explosion. But pushpin, it was impressive. The cats did not come back (literally).


Not sure about leftover nuts, but good.
Your stove went into "gasifier" mode because there was no flame to "ignite" the volatile materials which were released from the fuels under the effect of residual heat.
In industry, this is called a "boiler beanbag". it can be devastating.
The standards (NFPA for example, which although American refer to everywhere) impose a fairly long sweep (1 / 2h of memory) of the boiler in air before restarting a restart following a stop, to be sure that there is no accumulation of unburnt gases.
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Re: We escaped beautiful, finally, my wife especially!

Unread Messageby Ahmed » 23/03/20, 19:59

When I had a reverse combustion wood boiler, if I opened the loading door when the fuel load was not almost completely burned, it was systematic, since I introduced air (therefore oxygen) in a mass of gas at ignition temperature ...
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Re: We escaped beautiful, finally, my wife especially!

Unread Messageby izentrop » 23/03/20, 23:51

Hello,
A bad draft, a counter draft due to a VMC or an insufficient outside air intake? Has your stuv30 been installed correctly? http://www.duvivier.be/medias/documents ... 181658.pdf

page 34: adjustment of a stop to avoid the risk of explosion.
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