1.
A new type of insulating board has been developed by that esteemed
construction company Kaput Ltd. They
warn that at extremely high heat fluxes it could be ignited, but they don’t
think it’s very likely and it would take hours, so there’s no real risk!
As an expert on the ignitability of
materials you are asked to perform a thick/thin calaculation given the
following data on the material:
Density 2300 kg m-3
Thermal conductivity 0.82 W m-1 K-1
Specific
heat capacity 824
J kg-1 K-1
Thickness of
board 7mm
Initial/ambient
laboratory temperature 18°C
Ignition
temperature 410°C
It is considered that
if 20 kW m-2 would be enough to ignite most materials (i.e.
indicative of flashover fires). Perhaps something easy to ignite would only
require 10 kW m-2. Would this
material ignite within ten minutes if exposed to 10 kW m-2?
Useful formulae:
[img width=”99″ height=”44″ src=”file:///C:/Users/adnan/AppData/Local/Temp/msohtmlclip1/01/clip_image010.png” v_shapes=”_x0000_i1029″>
1.
A new type of insulating board has been developed by that esteemed
construction company Kaput Ltd. They
warn that at extremely high heat fluxes it could be ignited, but they don’t
think it’s very likely and it would take hours, so there’s no real risk!
As an expert on the ignitability of
materials you are asked to perform a thick/thin calaculation given the
following data on the material:
Density 2300 kg m-3
Thermal conductivity 0.82 W m-1 K-1
Specific
heat capacity 824
J kg-1 K-1
Thickness of
board 7mm
Initial/ambient
laboratory temperature 18°C
Ignition
temperature 410°C
It is considered that
if 20 kW m-2 would be enough to ignite most materials (i.e.
indicative of flashover fires). Perhaps something easy to ignite would only
require 10 kW m-2. Would this
material ignite within ten minutes if exposed to 10 kW m-2?
Useful formulae:
[img width=”99″ height=”44″ src=”file:///C:/Users/adnan/AppData/Local/Temp/msohtmlclip1/01/clip_image010.png” v_shapes=”_x0000_i1029″>
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