need perfect work ....

Apr 8th, 2015
KateS
Category:
Biology
Price: $10 USD

Question description

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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