scsr presentation

CDC/NIOSH & Technical Products Inc.

Self Contained Self Rescuer

8 August 2007

8 August, 2007 Technical Products Inc. 2

Self Contained Self Rescuer

OUTLINE• Rebreather SCBAs• Self Contained Self Rescuer• CO Filter Self Rescuer • Breathing Air Monitor• System Functional Concept• Q&A• Demo/Test


Rebreather SCBA


Why A Rebreather?

Open Loop SCBA• Uses air – 20% O2• Expired breath still contains 15% O2 – vented to

atmosphere & wasted

Closed Loop SCBA (Rebreather)• Recycles expired air to use all O2 (4 x efficiency)• Adds O2 as needed to extend breathability of trapped

volume• Problem is what to do with CO2 produced by respiration• Chemical scrubber strips out CO2


Closed Loop SCBA (Rebreather)

• Pendulum or loop configuration

• Uses scrubber to strip CO2

• Uses gas bottle(s) or solid state chemical (KO2) to maintain O2 concentration & gas volume

• Uses aural/nasal mask or mouthpiece/nose clip


Self Contained Self Rescuer (SCSR)


Self Contained Self-Rescuer (SCSR)

• O2 Pendulum Rebreather• O2 flow demand regulated

automatically• LiOH CO2 Scrubber• When rebreather is spent

SCSR ‘docks’ to any other breathing air supply

• 1-hr breathing unit• Weighs 5.7-lb.


Self Contained Self-Rescuer (SCSR)

• When needed uses opens container and deploys breathing hose

• First exhale purges lungs to atmosphere

• First inhale starts O2 at full flow

• Second exhale inflates counterlung

• O2 flow demand regulated automatically


CO2 Scrubber

• LiOH scrubber absorbs CO2 from respiration

• 50% more efficient than CaOH

• Micropore Inc. configuration fixes LiOH in polyethylene matrix– Rigid structure– Controlled airflow– No settling– No channelization– 1-hr scrubber weighs 1.2-lb


Docking Device

Allows user to change or exchange air supplies without breaking seal

• Allows selection of air supply in real time

• Multiple mechanical safeties– Can’t ‘select’ to vent to

atmosphere– Can’t detach ‘live’ air

supply


Gas Bottle

• Demo system uses Al bottle (46-l) of O2 at 3,000-psi

• Production system will use SS bottle (110-l) for 4,500-psi O2

• US DOT will not certify carbon wrapped Al for high pressure O2.

• European agencies approved carbon wrapped Al 4,500-psi O2 with savings of >2-lb


SCSR ComparisonOcenco M-20 Ocenco EBA 6.5 CSE SR-100 TPI SCSR

MSHA/NIOSH Duration 10 minutes 60 minutes 60 minutes 60 minutesTotal Weight 3.3 lbs 9.2 lbs Al cylinder 5.7 lbs 5.7 lbs SS cylinder

8.2 lbs Fiber wrapped cylinder

3.5 lbs Fiber wrapped cylinder

Dimensions 7.2" x 6.5" x 3.1" 8.5" x 11.8" x 4.5" 7.75" x 4" x 5.5" 10" x 4.5"Volume 145-cu.in. 450-cu.in. 170-cu.in. 160-cu.in. KO2 N/A N/A Yes N/A

O2 Cylinder pressure 3,850 PSI 3,000 PSI N/A 4,500 PSI

SCSR Advantages

•O2 on-demand only – most efficient approach since there is no ‘lost’ O2 (c.f. constant flow)

•Pressurized gas – just check the gauge to see if the system is serviceable (c.f. solid state KO2 systems)

•Pressurized gas – simple response to high demand (c.f. solid state KO2 systems)

•Dockable – unlimited air supply without breaking seal

•Dockable – seamless interface to other FSR & air sources

•Minimized counterlung with 100% air exchange prevents N2 hypoxia


CO Filter SR


CO Filter Self Rescuer

Current ‘standard’ is the W-65• Breathes hot (65-deg C)• Susceptible to moisture• Short duration


CO Filter Self RescuerTIME (Min)

UP-STREAM TEMP (Deg C)

UP-STREAM R.H. (%)

DOWN-STREAM TEMP (Deg C)

DOWN-STREAM CO CONC (PPM)

0 24.6 95.2 27.7

5 24.3 97.2 40.2 2.7

10 24.7 93.8 43.0 2.7

15 24.3 96.9 43.7 2.8

20 24.3 96.9 44.1 2.8

25 24.3 96.7 44.3 2.8

30 24.3 97.2 44.5 2.9

35 24.3 97.2 44.4 2.9

40 24.5 93.8 44.7 2.8

45 24.4 96.1 44.7 2.9

50 24.2 96.2 44.4 2.9

55 24.3 95.7 44.6 3.0

60 24.1 97.7 44.4 2.965 24.4 94.0 44.6 2.9

New configuration• Breathes less hot (45-deg c vs 65-deg c)• Not susceptible to moisture• Long, long duration or small, small size

CO inflow at 3,000-ppm


CO Filter Self Rescuer

New configuration• Configured as stand alone complete FSR• Configured as dockable module for SCSR• Configured with NATO 40-mm thread• Possibly integrated into SCSR


Breathing Air Monitor



Current devices are too smart, complex and expensive for ‘global’ use• Digital displays• Data logging• PC connectivity

Current devices are too short lived for economic application in ‘global’ use• 2-yr sensor life• 2-yr battery life



New devices is simple, application specific and in-expensive • LED ‘idiot’ lights (plus siren and vibrator)• Monitors O2 and Co levels simultaneously (go/no-go)• Stand-alone monitoring device• Will be IS (Tridelphia certified)

New device has sufficient life to make economic sense• 5-yr sensor life• 2-yr battery life (rechargeable battery, field servicable)


SCSR System

•An integrated system of survival devices

•Seamless interface to other air supplies

•Maximizes survival chances in multiple scenarios

•Responds to work load (sedentary to extreme)

•Easily scalable from short to long duration

•Simple add-ons for new capability (comms?)


Q&A


Feed-back On User Needs & Wants

• Concept of BAM and miner selection of air source?• Scalable duration unit?• Selectable protection?• Combined SCSR/CO-FSR?• Miner communications?


SCSR Lab Demo


TPI Contact Information

Technical Products, Inc.31 Willow RoadAyer, MA 01432

Paul Chambers

(v) 978 772-4980(f) 978 772-4981

(e) [email protected]

mailto:[email protected]


Miner-Talk• Let miners communicate without

breaking seal. • Support face-to-face and line-of-

sight comms– Use bone-induction mouthpiece

(combo microphone/speaker)– Combination short range RF

transceiver and voice amplifier– Possible link to surface/rescue

teams– Press to talk maximizes battery

life– Configure as ‘dockable’ add-on to

SCSR


Tactical Rebreather

(TACR)• Closed loop surface

SCBA

• Developed for TSWG & first responder user groups

• 2-hr capacity with 30-min reserve @ 20-lb

• Positive Pressure Mask

• O2 sensor with system status indicator

• Currently under test at NPPTL

scsr presentation

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