General solution for cooling personnel in CBR suit ( Chemical, Biological and Radiation)

1. Cooling Solution for CBR Suit
Keeping the soldier cool
in a Chemical-Biological-
Radiation (CBR) suit

2. Major Hotspot on the human body
Implications ...
• Cooling the chest area would have the
maximum impact of lowering overall body
temperature.
• Required cooling capacity would be higher.

3. Contributing Factors to Higher Body Temperature
Close or Open Suit
Individual Metabolism
Body Temperature
Environment Temperature
Physical Activity
Close or Open Suit
Individual Metabolism
Body Temperature
Environment Temperature
Physical Activity

4. Contradiction
Cooling Physical
Capacity Weight
Acceptable Cooling
Weight affe
c ts . Capacity
..
Energy
interdependency
ts .
.. Capacity
af f ec
Battery
Operating
Technology
Duration

5. Current Solution
Passive Cooling Active Cooling
• Coolant gel or liquid • Liquid circulation
• Phase change material • Air circulation
*Activated by soaking in a cold medium, use and
re-soak for continual operation * Electrically-powered device to drive air or liquid
circulation around hot spot.

6. Examples
Rabintex, Israel
Rini Technologies, USA
US Army, USA

7. General Comparative Data
Method Weight Duration
Passive Cooling 250g to 1Kg < 1.5 hrs
(coolant)
Passive Cooling 500g to 1.5Kg < 3 hrs
(Phase Change Material)
Active Cooling 2 to 3 Kg 2 to 4 hrs
(Liquid circulation)
Active Cooling 500g to 1Kg 5 to 8 hrs
(Air circulation)

8. Model of a Active Cooling System

9. New Approaches ...
• Mount the heated side of Peltier cooler on soldier back
serve to dissipate heat + protection from bullets.
Peltier Cooler

10. New Approaches ...
• Use a denser coolant like ferromagnetic liquid
to assist in heat conduction.
• Ferromagnetic liquid = Ferromagnetic powder + oil

11. New Approaches ...
• Foot powered liquid pump instead
of using a electric pump.
• Reduce the electrical loading.

12. New Approaches ...
• Temperature feedback to conserve battery power
• Wireless temperature sensor to monitor body hotspot

13. New Approaches ...
• Externally detachable battery for quick changeover
and continuous operation

14. New Approaches ...
Other Improvement to existing solution
• Inductive charging for battery
• Possibility of using liquid nitrogen or
compressed air capsule as a coolant.

15. Discussion