While reading through the eleventh edition of the Automatic Sprinkler System Handbook, I stumbled upon Section A.3.6.1 which talks about general sprinkler characteristics.
In this section, the following paragraph was of interest to me:
"For modelling purposes, concealed sprinklers can be considered equivalent to pendent sprinklers having a similar thermal response sensitivity installed 12 in. (305 mm) below smooth unobstructed ceilings, and recessed sprinklers
can be considered equivalent to pendent sprinklers having a similar thermal response sensitivity installed 8 in. (203 mm) below smooth unobstructed ceilings."
As the above claim did not have a reference which I could review for validation purposes, I would like to know if anyone else has tried using the above method to model the behaviour of concealed sprinklers using FDS. Are there any studies carried out to verify the above?
Has anyone tried alternative methods of modelling concealed sprinklers to accurately represent its activation?