| |
|
|
|
|
|
|
| |
CLEAN AGENT VOLUME ESTIMATOR
|
|
Symbol
|
Description
|
Equation
|
Source
|
Value
|
Units
|
|
|
|
|
|
|
|
|
Given/Assumed
|
|
|
|
|
|
|
|
| |
-
|
Agent Type
|
-
|
Given
|
|
ft
|
| |
-
|
Hazard Clasification
|
-
|
NFPA 2001 Table A.5.4.2.2(b)
|
|
-
|
| |
l
|
Length of Space
|
-
|
Given
|
|
ft
|
| |
w
|
Width of Space
|
-
|
Given
|
|
ft
|
| |
h
|
Height of Space
|
-
|
Given
|
|
ft
|
| |
t
|
Temperature of Space
|
-
|
Given
|
|
deg F
|
| |
Vfixed
|
Fixed Inpenetrable Volume within
Space
|
-
|
Estimated
|
|
ft3
|
| |
C
|
Design Concentration
|
-
|
NFPA 2001 Table A.5.4.2.2(b)
|
|
%
|
|
|
|
|
|
|
|
|
Solution
|
|
|
|
|
|
|
|
| |
V
|
Net Volume of Space
|
V = l w h - Vfixed
|
Definition of Volume
|
|
ft3
|
| |
|
| |
s
|
Specific volume of the agent
|
|
|
|
ft3/lb
|
| |
W
|
Approximate Agent
Weight
|
W = (V/s) [C/(100-C)]
|
SFPE 5th p1512, NFPA
2001-2015 Table A.5.5.1
|
|
lb
|
| |
|
|
|
|
|
|
|
|
|
Notes
|
|
|
|
|
|
|
|
| |
This tool is used for
preliminary estimating only. Actual agent quantity depends upon incorporating
Design Factors of NFPA 2001 5.5.3, Atmospheric Fcorrection Factors, Duration
of Protection, and Discharge time which accomodates special conditions affecting
extinguishing efficiency.
|
|
|
|
|
|
|
|
|
References
|
|
|
|
|
|
|
|
|
1
|
SFPE
|
SFPE Handbook of Fire
Protection Engineering, 5th Edition
|
|
2
|
NFPA 2001
|
Standard on Clean
Agent Fire Extinguishing Systems, 2015 Edition
|
|
3
|
FPH
|
Fire Protection
Handbook, 20th Edition
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|