CBR CBR 207: Writing Effective Community-Based Research Proposals.
Cooling Solution for CBR Suit
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Keeping the soldier cool in a Chemical-Biological-Radiation (CBR) suit
Cooling Solution for CBR Suit
Major Hotspot on the human body
Implications ...• Cooling the chest area would have the
maximum impact of lowering overall bodytemperature.
• Required cooling capacity would be higher.
Individual Metabolism
Close or Open Suit
Environment Temperature
Physical Activity
Body Temperature
Contributing Factors to Higher Body Temperature
Individual Metabolism
Close or Open Suit
Environment Temperature
Physical Activity
Body Temperature
Contradiction
CoolingCapacity
PhysicalWeight
AcceptableWeight
BatteryTechnology
EnergyCapacity
OperatingDuration
CoolingCapacityaffects ...
affects ...interdependency
Passive Cooling• Coolant gel or liquid• Phase change material
Active Cooling• Liquid circulation• Air circulation
Current Solution
*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.
Rini Technologies, USA
Rabintex, Israel
US Army, USA
Examples
Method Weight DurationPassive Cooling(coolant)
250g to 1Kg < 1.5 hrs
Passive Cooling(Phase Change Material)
500g to 1.5Kg < 3 hrs
Active Cooling(Liquid circulation)
2 to 3 Kg 2 to 4 hrs
Active Cooling(Air circulation)
500g to 1Kg 5 to 8 hrs
General Comparative Data
Model of a Active Cooling System
• Mount the heated side of Peltier cooler on soldier backserve to dissipate heat + protection from bullets.
Peltier Cooler
New Approaches ...
New Approaches ...
• Use a denser coolant like ferromagnetic liquidto assist in heat conduction.• Ferromagnetic liquid = Ferromagnetic powder + oil
New Approaches ...
• Foot powered liquid pump instead of using a electric pump.
• Reduce the electrical loading.
• Temperature feedback to conserve battery power• Wireless temperature sensor to monitor body hotspot
New Approaches ...
• Externally detachable battery for quick changeoverand continuous operation
New Approaches ...
• Inductive charging for battery
• Possibility of using liquid nitrogen or compressed air capsule as a coolant.
New Approaches ...
Other Improvement to existing solution
Discussion