NEW MEXICO ENGINEERING RESEARCH INSTITUTE
HALON OPTIONS TECHNICAL WORKING CONFERENCE
David A. Pelton
Ansul Fire Protection
May 4,1994
INERGENm SYSTEM DESIGN AND APPLICATION
lntroduction
In order to help understand the design process, a typical example hazard is
covered in this section. There may be different design approaches that can be
taken for any given hazard. The example is only intended to show what has to
be done to complete the design and hydraulic calculations.
Following is an outline of the example hazard. Each item is listed in the
numerical order in which it should be performed.
31
HAZARD ANALYSIS
HAZARD TYPE
- Describe Type of Hazard Being Protected
HAZARD INTEGRITY SURVEY
- Unenclosable Openings, HVAC Considerations
HAZARD ATMOSPHERE
- Occupied, Non-Occupied, Explosion Proof
TYPE OF FIRE
- Class A, B, C or D
VENTILATION CONSIDERATIONS
- Ventilation Systems - Shutdown, Dampered
ELECTRICAL CONSIDERATION
- Power Sources Shutdown
TEMPERATURE RANGES
Determine Minimum and Maximum Temperatures
Agent Cylinders
DetectionControl System
VOLUME REDUCTIONS
- Moveable, Non-Moveable
OTHER FACTORS
- Handicapped Personnel
- Response Time of Fire Service
- Reserve System
- Cylinder and Accessory Location
Discharge Test
- Authority Having Jurisdiction
ANSUL, UL EX4510
SECTION XI
12-1-93 Page 11-2
Example No. 1 - Control Room
Control rooms are found in all types of industry, housing ITEM NO. 2 -Design Calculation Sheet. Fill out the cab
transformers, motors. switch gear and other types of elec- culation sheet with the information required to determine
tronic devices necessary for energizing the various types total quantity of agent and percent of INERGEN agent c o n
of equipment. centration.
Protection of control rooms can be accomplished by treat- ITEM NO. 3 - Preliminary Drawing. Complete a drawing
ing it as a totai flood hazard in accordance with require- or sketch as accurate as possible to determine pipe
ments of NFPA 2001, "Standard for Clean Agent Fire lengths and number of fittings. Locate and number all
Extinguishing Systems." node points and nozzles.
The design of the INERGEN system should be in accord- ITEM NO. 4- Flow Calculation Input Form. With the in-
ance with NFPA 2001, which states, "the design concen- formation on pipe lengths, fittings, node pomts, and noz-
tration must be achieved within 1 minute. It is important zles, fill in the input form.
that an effective agent concentration not only be achieved, ITEM NO. 5 -Computer Print Out. The computer print.
but shall be maintained for a sufficient period of time to out will compute discharge time. pipe sizes. union orifice
allow effective emergency action by trained personnel." size, and nozzle orifice sizes.
Personnel safety is the first concern. The INERGEN sys- ITEM NO. 6 -Bill of Material. This should be generated
tem should incorporate a discharge alarm andlor pre- to show the complete list of all required hardware.
discharge alarm to warn personnel of a discharge. A time
delay device is not needed due to the life supporting
ITEM NO. 7 -Application Drawing. This typtcal applica-
tion drawing is an example of the type of drawing which
characteristics of INERGEN agent.
is generated from Ansul Application Engineering Depart-
Electrical power and ventilation must be shut down prior ment. This drawing is normally used to secure approval
to system actuation. Common AJC duct may require from the local authority.
dampering to prevent INERGEN agent loss.
Smoke detection is recommended.
The authority having jurisdiction may have additional re-
quirements.
HAZARD
A control room having dimensions of 30 It. x 20 fi. x 10
It. high.
No unclosable openings.
Ventilation to be shut down at system actuation.
ITEM NO. 1 -Sketch of Hazard. Do an accurate sketch
of the hazard area and measure all solid, permanent
objects.
33
SECTION XI
ANSULo UL EX-4510 12-1-93 Page 11-3
Example No. 1 - Control Room
L I
Item No. 1
SKETCH OF HAZARD
SECTION XI
UL EX4510 12-1-93 Page 11-4
Example No. 1 - Control Room
Item No. 2
DESIGN CALCULATION SHEET
INERGEN DESIGN CALCULATION WORKSHEET
DATE 1 2 / 9 / 9 3
OUOTUJOE NUMBER: Example 1
CUSTOMER: Ansul Fire Protection
VOLUME CALCULATIONS: ABEA
Area Name: Control Room
Length (ft.): 30.00
Width (ft.): 20.00
Height (ft.):l
~ ~~
10.00
~
1
Area (sq. ft.): 600.00
Volume (cu. ft.): 6000.00
volume Reductions:
Structural Reductions (cu. ft.):
Reduced Volume:
(Volume - Structural Reductions)
Movable Object Reductions (cu.
]-[:).tf
(IfMore Than25% of Reduced Volume)
Total Reduced Volume (cu. n.):[ 6000.00
(Volume - reductions)
ROOM MINIMUM AMBIENT TEMP.:
DESIGN CONCENTRATION:
FLOODING FACTOR:
(From Table)
INITIAL INERGEN OUANTITY CALC.:
INERGEN Quantity (CU. ft.):l 2876.26
(Total Reduced Volume x Flooding factor) or (Formula from Design Manual)
ALTITUDE CORRECTION:
Height Above or Below Sea Level:
Factor:
(From Design Manual Table)
ACTUAL INERGEN OUANTITY (cu. tt.):l 2559.87 1
ilnilfal Inergen Ouanlity x Altitude Correction Factor)
35
ANSUL. SECTION XI
U L EX-4510 12-1-93 Page 11-4.1
Example No. 1 - Control Room
Item No. 2
DESIGN CALCULATION SHEET12
ACTUAL INERGEN QUANTITY (CU. fi.):l 2559.87
(From Page 1)
CYLINDER REQUIREMENTS: TOTAL CYLINDER CAPACITY:
(INERGEN qty. + cylinder capacity
CYLINDER SIZE SELECTED:
INERGEN AGENT SUPPLIED:
(Cylinder qty. x Cylinder capacitj’)
ACTUAL INERGEN FLOODING FACTOR:( 0.532 I
[(INERGEN Agent Supplied + Alt. Correction Factor) + Total Reduced Volume]
CONCENTRATIONRANGECHECK
-
(Design Conc. Must be Between 37.5% 42.8% For Occupied Spaces)
Room Max. Ambient Temp.:[
Design Concentration at Max. Temp:(
80
4 1.8%
1
I
( Locate Actual INERGEN Conc. at Max. Temp. on Table, or Use CalC. in Design Manual]
DISCHARGE TIME:
Normal Ambient Temperature:
Design Concentralion a1 Ambient Temp.:
( Locate Actual INERGEN Conc. a t Amb. in Design Manual)
90% of Agent Discharge Time (Sec.):
(Time f r o m Table in Design Manual)
90% of Agent Discharge Time (Min):l 1.02 I
(Discharge Time (Sec.)/fiO)
ESTIMATED FLOW RATES:
Estimated System Flow Rate:[ 2512
[(INERGEN Agent Supplied x .9) + Discharge Time (Min.)]
Estimated Orifice Union Pipe Size:( 1
(Refer to Pipe Sizing Chart)
Nozzle Quantity:( 1 I
(length + 32 (Rounded to Next Highest Whole Number)
x width + 32 (Rounded to Next Highest Whole Number)]
Estimated Nozzle Flow Rate:( 2512.36
(System Flow Rate + Nozzle Quantity)
Estimated Nozzle Pipe Size:l 1
(Refer to Pipe Sizing Chart)
36
SECTION XI
UL EX-4510 12-1-93 Page 11-5
Example No. 1 - Control Room
Item No. 3
PRELIMINARY DRAWING
ANSUL, SECTION XI
UL EX-4510 12-1-93 Page 11-6
Example No. 1 - Control Room
Item No. 4
-~
FLOW CALCULATION INPUT FORM
. ~ .
. . ..
....,...
,. . .
38
SECTION XI
UL EX-4510 12-1-93 Page 11-7
Example No. 1 - Control Room
Item No. 5
COMPUTER PRINT OUT - ORIFICE CALCULATION INPUT
Prepared by: ANSUL FIRE PROTECTION
Location: DALE EDLEECK.
ANSUL INERGEN FLOW CALCULATION vl.O
U.L. LISTED EX4510 12/1/93
D a t e : 12-08-1993
DATA INPUT FILE N A M E IS 6:EXAMPLEl.DOC
DATA INPUT FILE
PIPE THRU SIDE CPLG INERGEN
SEC SEC LENGTH ELEV CODE 90’s TEE TEE UNION QTY EQL
1 2 0.0 0 .500-40T 0 0 0 0 501.0 38
2 3 1.0 0 1.00-60T 1 0 0 0 501.0 0
3 4 1.0 0 1.00-80T 0 1 0 0 502.0 0
4 5 1.0 0 1.00-80T 0 1 0 0 503.0 0
5 6 1.0 0 1.00-80T 0 1 0 0 504.0 0
6 7 0.5 0 1.00-80T 0 1 0 0 505.0 0
7 8 1.0 1 1.25-601 1 0 1 0 508.0 0
8 9 0.5 1 1.25-80T 0 0 1 0 508.0 0
9 10 900.0 950 0 0 0 0 0.0 0
10 101 48.0 3 1.25-40T 4 0 0 0 2840.0 0
-. ,
:., ..:
39
SECTION XI
UL EX-4510 12-1.93 Page 11-7.1
Example No. 1 - Control Room
Item No. 5
COMPUTER PRINT OUT - ORIFICE CALCULATION PRESSURE LOSS OUTPUT
Prepared by: ANSUL FIRE PROTECTION
Location: DALE EDLBECK.
ANSUL INERGEN FLOW CALCULATION V1.O
U.L. LISTED E X 4 5 1 0 1 2 / 1 / 9 3
Date: 12-08-1993
DATA I N P U T FILE NAME I S B:EXAMPLEl.DOC
JOB NUMBER 1
CUSTOMER NAME ANSUL FIRE PROTECTION
ADDRESS : 1 STANTON STREET
MARINETTE. WI 54143
REMARKS: CONTROL R O O M
AGENT S T O R A G E CONDITIONS
8 - 355 CU F T CYLINDERS OF I N E R G E N
T O T A L AGENT IN STORAGE I S 2840 C U F T
S T O R A G E PRESSURE I S NOMINAL 2200 P S I at 7 0 DEG F
P R E S S U R E DROP CALCULATION
NOMINAL LEN EQL EL START TERM FLOWRATE
SEC SEC P I P E SIZE [FT) (FT) ( F T ) TEE PSIA PSIA (CFM)
1 2 1/2 40 T 0 38.0 0 MFLD 1033 1003 464
2 3 1 80 T 1 3.4 0 MFLD 1003 1005 464
3 4 1 80 T 1 2.6 0 MFLD 1005 1004 927
4 5 1 80 T 1 2.6 0 MFLD 1004 10B2 1391
5 6 1 80 T 1 2.6 0 MFLD 1002 997 1854
6 7 1 80 T 1 2.1 0 MFLD 997 990 2318
7 8 1 114 80 T 1 10.6 1 MFLD 990 97s 3709
8 9 1 114 80 T 1 6.9 1 MFLD 979 912 3709
9 10 ORIFICE 0.582 INCHES 972 563 3709
10 101 1 1/4 40 T 48 61.8 3 563 584 3709
HIGHEST CALCULATED PRESSURE D O W N S T R E A M OF ORIFICE I S 1089 PSIA
I N I T I A L PIPELINE TEMPERATURE IS 7 0 D E G R E E S F .
::.... ,
..,; . ,..
.:. .
40
__
ANSUL, SECTION XI
UL EX-4510 12-1-93 Page 11-8
Example No. 1 - Control Room
Item No. 6
BILL OF MATERIALS
BILL OF MATERIALS
Quote No.: Example 1 Dale: I t / t 9 / 9 3
Customer Name: Ansul Fire Protection Page: 1 of 1
Customer Address: 1 Stanton Street Produa Line: WMGEN
Marinette. WI 54143
PhoneNo.: 715-735-7411 Project: Design Manual
FaxNo.: 7 1 5 -7 3 2 -3 4 7 9 Control Room
Contact Name: Examole
PART
N3. DESCRIPTION
4 1 6447 350 CU. FT MASTER CYLINDER W/ CV90 VALVE
842424 DISCW\RGEHOSE
8731 i t ELECTRIC SOLENOID VALVE ACTUATOR
870846 LEVER RELEASE, WI HANDLE 8 PIN
4 1 6680-35 1 1 / 4 NPT ORIFICE UNION
840309 HEADERVEMPLUG
846250 PNEUMATIC SWITCH DPST
841 942 NAMEPLATE - "MAIN"
841 943 NAMEPLATE. "RESERVE
41 6265 WARNING PLATE - INSIDE W/ ALARM
41 6266 WARNING PLATE - OUTSIDE W/ ALARM
417365-58 11/4"NPTlNERGENNOZZLE
1 841 549 1.1/4" CHECK VALVE - THREADED
4 879640 BACK FRAME ASSEMBLY (4 CYLINDER)
4 873255 25- CARRIAGE BOLT a NUT (DEL ROW 350)
4 873091 CYLINDER CLAMP (2CYLINDER)
2 879413 CONNECTOR(7ORMORECYL. INAROW)
TOTAL WEIGHT: 3654 Ibs.
TOTALVOLUME: 85 CU. it.
41
I I
42
