cooling solution for cbr suit
DESCRIPTION
General solution for cooling personnel in CBR suit ( Chemical, Biological and Radiation)TRANSCRIPT
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Keeping the soldier cool in a Chemical-Biological-Radiation (CBR) suit
Cooling Solution for CBR Suit
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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.
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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
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Contradiction
CoolingCapacity
PhysicalWeight
AcceptableWeight
BatteryTechnology
EnergyCapacity
OperatingDuration
CoolingCapacityaffects ...
affects ...interdependency
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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.
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Rini Technologies, USA
Rabintex, Israel
US Army, USA
Examples
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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
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Model of a Active Cooling System
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• Mount the heated side of Peltier cooler on soldier backserve to dissipate heat + protection from bullets.
Peltier Cooler
New Approaches ...
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New Approaches ...
• Use a denser coolant like ferromagnetic liquidto assist in heat conduction.• Ferromagnetic liquid = Ferromagnetic powder + oil
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New Approaches ...
• Foot powered liquid pump instead of using a electric pump.
• Reduce the electrical loading.
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• Temperature feedback to conserve battery power• Wireless temperature sensor to monitor body hotspot
New Approaches ...
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• Externally detachable battery for quick changeoverand continuous operation
New Approaches ...
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• Inductive charging for battery
• Possibility of using liquid nitrogen or compressed air capsule as a coolant.
New Approaches ...
Other Improvement to existing solution
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Discussion