User's Manual

Design
September 2013 3-42 P/N 81-CO2MAN-001
EXAMPLE 10 - LOCAL APPLICATION: RATE-BY-AREA - Tankside Nozzles
Consider a quench tank with liquid surface dimensions of 3 ft. x 7 ft. . Minimize carbon dioxide
and nozzle requirements while using a tankside nozzle location. Calculate the quantity of nozzles,
minimum flow rate and the minimum carbon dioxide supply for the hazard.
From Equation (21):
Where is the Quantity Of Nozzle Rows and is the Width of the Protected Area.
=  4
= 3  4
= 0.75
 1 row
From Equation (22):
Where is the Width of the Nozzle Coverage Area.
= 3  1
= 3 ft.
From Equation (23):
Where is the Maximum Nozzle Coverage Length and is the Maximum Nozzle Coverage
Area.
From Table 3-7A:
= 11.75
ft.
2
= 11.75  3
= 3.9 ft.
From Equation (24):
Where is the Quantity of Nozzles per Row and is the Length of the Protected Surface.
= 
= 7  3.9
= 1.8
 2 nozzles
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L
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