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Driver Recert 2012 Topics Update on Fire Hose Friction Loss Coefficients Fire Flow Through Long LDH Supply Lines Rural Water Supply Flow Rates Booster.

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Presentation on theme: "Driver Recert 2012 Topics Update on Fire Hose Friction Loss Coefficients Fire Flow Through Long LDH Supply Lines Rural Water Supply Flow Rates Booster."— Presentation transcript:

1 Driver Recert 2012 Topics Update on Fire Hose Friction Loss Coefficients Fire Flow Through Long LDH Supply Lines Rural Water Supply Flow Rates Booster Tank Fill Rate Data Engine Deck Gun Flow Rate Data Tower Monitor Flow Rate Data Rescue 351 Topics Other Stuff in General 1

2 Fire Hose Friction Loss Calculation Changes Are On the Way 2

3 Overall objective of research project was to develop friction loss char of modern fire hose and use new FL data to support the revision of the FL coefficients Current FL coefs based on old hose mfg technology are considered to be outdated and overly conservative Tests conducted at 3 different test sites from Oct 2010 thru Sep 2011, final report was issued in Apr 2012 Six hose manufacturers participated in tests: Key, Angus-UTC, All American/Snap-tite, Mercedes, and North American Test results indicated that the majority of the FL coefs for today’s fire hose fall significantly below current values Conclusion: A fairly large degree of variability was observed in the test data. A more thorough statistical analysis is necessary for identifying statistically significant trends. Additional testing may be required to support the analysis. 3

4 Friction Loss Coefficients 4

5 Example of Reduced Friction Loss in Modern Fire Hose Recent rural water supply test conducted in Rincon, GA to support ISO Determined how much water flow can be provided through a very long 5” LDH supply line Several engines laid a 6,000 ft. 5” supply line What is the maximum water flow (GPM) that can realistically be supplied through this supply line? 5

6 Hydrant Location Hydrant Static Pressure Hydrant Residual Pressure Pump Intake Valve Used Pump In Gear Tank Fill Rate Enterprise Ct. (Box 313) 45 psi 35 psi2-1/2” AuxNO215 GPM 20 psi2-1/2” AuxYES375 GPM 35 psi2-1/2” DTF-375 GPM Selvin Dr. (Box 321) 90 psi 70 psi2-1/2” AuxNO300 GPM 70 psi2-1/2” AuxYES375 GPM 70 psi2-1/2” DTF-575 GPM KEY COMPARISON: Filling the tank with 3” line into the Direct Tank Fill intake at 100 psi intake pressure takes about 1 min 15 sec for a fill rate of 600 GPM Filling the tank using the regular Tank Fill valve with pump discharge pressure at 100 psi takes about 2 min for a fill rate of 375 GPM Booster Tank Fill Rate Test 6

7 Intake Pressure (Master Gauge) Discharge Pressure (Master Gauge) Deck Gun Gauge Pressure Deck Gun Pressure (Gauge on Gun) Nozzle Pressure (Pitot Gauge) Nozzle Size (Smooth bore) Deck Gun Flow (Table Reading) Deck Gun Flowmeter 40 psi85 psi68 psi75 psi56 psi1-1/2”500 GPM580 GPM 35 psi100 psi72 psi 60 psi1-3/4”700 GPM750 GPM 30 psi110 psi80 psi 68 psi1-3/4”750 GPM800 GPM 30 psi120 psi90 psi 78 psi1-3/4”800 GPM820 GPM 28 psi130 psi100 psi 88 psi1-3/4”850 GPM880 GPM 22 psi145 psi115 psi110 psi98 psi1-3/4”900 GPM950 GPM 12 psi170 psi135 psi130 psi120 psi1-3/4”1000 GPM1110 GPM Deck Gun Flow Test – E313 7

8 Intake Pressure (Master Gauge) Discharge Pressure (Master Gauge) Deck Gun Gauge Pressure Deck Gun Pressure (Gauge on Gun) Nozzle Pressure (Pitot Gauge) Nozzle Size (Smooth bore) Deck Gun Flow (Table Reading) Deck Gun Flowmeter 80 psi110 psi88 psiInoperative64 psi1-3/4”727 GPM Very High, Inaccurate Readings 80 psi128 psi100 psi80 psi1-3/4”813 GPM 78 psi125 psi110 psi86 psi1-3/4”843 GPM 75 psi150 psi125 psi98 psi1-3/4”900 GPM 72 psi182 psi150 psi120 psi1-3/4”1000 GPM 70 psi140 psi100 psi70 psi2”994 GPM 68 psi160 psi120 psi80 psi2”1063 GPM Deck Gun Flow Test – E314 8

9 Engine Pressure (Master Discharge Gauge) Deck Gun Flow (Smoothbore Nozzles) 85 psi500 GPM 90 psi600 GPM 100 psi700 GPM 125 psi800 GPM 145 psi900 GPM 160 psi1000 GPM Deck Gun Flow – Smoothbore Nozzles 9

10 DETERMINING FLOW WITH PRE-PIPED MONITORS The simplest procedure to determine flow with automatic nozzles is with a flow meter. If a flow meter is unavailable, then the flow may be estimated using pressure loss data between the nozzle and an in-line pressure gauge at the pump or considerably upstream from the nozzle. Data is taken with a smooth bore nozzle and handheld pitot gauge. Note: Equations assume no substantial change in elevation between in-line pressure gauge and nozzle. Step1: Determine flow of smooth bore nozzle. Flow water with a smooth bore nozzle and record the nozzle’s size, pitot pressure and in-line pressure gauge reading. The smooth bore nozzle’s flow is calculated from the Freeman formula: Where: F = for English units (GPM, INCHES, PSI) Q smooth = F x D 2 Q smooth = flow in GPM D = exit diameter in INCHES Step 2: Find pressure loss constant. Using the results from step 1, use the following equation to calculate the pressure loss constant between the in-line pressure gauge and the nozzle: Where: C = piping pressure loss constant in GPM2/PSI P inline = in-line pressure gauge reading in PSI P pitot = pitot pressure in PSI Step 3: Calculate flow with automatic nozzle. Using the pressure loss constant from step 2 and the following equation, the flow with an automatic nozzle can be calculated for your particular installation. Where: Q auto = automatic nozzle flow in GPM P auto = nominal nozzle operating pressure in PSI Q smooth = F x D 2 Q auto = C =C = Q 2 smooth P inline - P pitot 10

11 Engine Pressure (Master Discharge Gauge) Deck Gun Flow TFT Auto Nozzle 135 psi400 GPM 140 psi575 GPM 145 psi700 GPM 150 psi800 GPM 155 psi900 GPM 160 psi1000 GPM Deck Gun Flow – TFT Auto Nozzle 11

12 Engine Pressure (Master Discharge Gauge) Deck Gun Flow (Smoothbore Nozzles) 85 psi500 GPM 90 psi600 GPM 100 psi700 GPM 125 psi800 GPM 145 psi900 GPM 160 psi1000 GPM Engine Pressure (Master Discharge Gauge) Deck Gun Flow (TFT Auto Nozzle) 135 psi400 GPM 140 psi575 GPM 145 psi700 GPM 150 psi800 GPM 155 psi900 GPM 160 psi1000 GPM Deck Gun Flow – Nozzle Comparison TFT Automatic NozzleSmoothbore Nozzles 12

13 Intake Pressure (Tower Intake Valve) Monitor Flow (Single Monitor) 120 psi600 GPM 135 psi800 GPM 175 psi1000 GPM 195 psi1250 GPM 220 psi1500 GPM 250 psi*1600 GPM Intake Pressure (Tower Intake Valve) Monitor Flow (Two Monitors Flowing) 105 psi1000 GPM 140 psi1200 GPM 185 psi1600 GPM 200 psi1800 GPM 250 psi*2000 GPM Single Monitor Flowing Both Monitors Flowing *Pressure relief valves on Tower intake valve and waterway opening Tower Monitor Flow Rates 13

14 Monitor Flow Intake Pressure No. Monitors Flowing 600 GPM120 psi1 800 GPM135 psi GPM 175 psi1 105 psi GPM 195 psi1 140 psi GPM 250 psi*1 185 psi GPM200 psi GPM250 psi*2 *Pressure relief valves on Tower intake valve and waterway opening Tower Monitor Flow Rates 14

15 Chicago FD – Hydrant Heavy Water Hook-Up 15

16 Chicago FD – Hydrant Heavy Water Hook-Up 16

17 New Special Tool on Rescue 351 Modified hydraulic fitting designed to relieve the hydraulic pressure on an Amkus HRT line that had become pressure locked in the field. This condition is caused by the charging of a hydraulic line without an HRT being hooked to the line. Without the use of the new special tool, the pressure in the locked line could only be relieved (bled off) back at the station and not in the field. 17

18 New Special Tool on Rescue 351 New Special Tool Coupling Tool Stowed in LR Compartment 18

19 Pressure Relieved on E314 LinePressure Relieved on R351 Line 19

20 R351 Foam System Controls 20

21 ???? 21

22 Other Stuff in General What’s unique about the Siren Brake on TW331? What’s different about the Transmission Mode control on TW331 and R351 compared to all of the other apparatus? If you turn OFF the Auxiliary Braking Device (Jake Brake or Trans Retarder) in rainy weather, what should you also do regarding your driving? What should a good EVD always do immediately following each run? 22


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