Problem with some definitions for Flare stacks and total pressure drop

[Saver2008]

Hi everybody!!!

Can anyone tell me the real meaning of these concepts:

-Double Dual Thermocouple (it is for Pilot)(It means that it is "2" thermocouple or what????
-Noise Maps
These correspond to flare topics.

And how can I calculate "Total Pressure Drop" on a flare stack?, I have total height and diameter but I need to calculate total pressure drop.

Thank you so much.
Saver

 

[BigInch]

probably 2 x thermocouples packaged together.
Noise maps are plots of dB sound levels eminating from the burning flare jet.
You'll also need to get a similar radient energy map.
To get the pressure drop, you'll need the maximum flowrate and pressure losses factors across all components.

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