User's Manual

Design
September 2013 3-58 P/N 81-CO2MAN-001
EXAMPLE 15 - AGENT SUPPLY - Supplied Quantity
Consider a local application that requires 448 lb.of carbon dioxide. A Pressure Operated Siren will
be located near the protected equipment. Determine the actual quantity of agent to be provided.
From Equation (33):
Where is the Minimum Agent Supply for the System, is the Minimum Agent
Quantity for the Total Flooding Portion(s), is the Minimum Agent Quantity for the Local
Application Portion(s), and is the Quantity of Agent Discharged Through the Pressure
Operated Siren(s).
= 0 lb.
= 448 lb.
From Equation (32):
Where is the Quantity of Pressure Operated Sirens, td is the Discharge Time, and is the
Pneumatic Delay Time.
= 1
From Equation (31):
Where is the Duration of Liquid Discharge of the Local Application Portion.
From Paragraph 3-6.1.3:
= 30 s
= 0.5 min.
= 1.4 x
= 1.4 x 0.5
= 0.7 min
= 30 s
= 0.5 min
= 20.4 x n x ( + )
= 20.4 x 1 x (0.7 + 0.5)
= 24.48
 25 lb.
= + +
= 0 + 448 + 25
= 473 lb.
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min,sys
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min,TF
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min,LA
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++=
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