Providing Innovative Thermal Management Solutions

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Providing Innovative ThermalManagement Solutions

• Advanced Liquid Cooling Workshop
• May 13, 2003
• Daniel P. Rini, Ph.D.
• President

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Outline

• RTI history status
• Company Focus
• Spray Cooling
• RTI approach
• High power lasers
• RTI Prototypes
• Micro Climate Cooling

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RTI History Status

• Founded by Dan Rini in the spring of 2000
• SBIR contract in June 00, 1 employee
• Ten employees, plus five UCF grad students and
  four advisors
• RD efforts with MDA, ASMDC, AFRL, DARPA, all the
  major military laser manufacturers
• Delivering spray cooling prototypes to laser
  manufacturers
• Seven patents pending

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Company Focus

• Near term Development of advanced cooling
  solutions for military solid-state lasers
• Long term A product line of cooling solutions
  for lasers other thermal management limited
  technologies

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Evaporative Spray Cooling
High Heat Flux Cooling h 500,000 W/m2K q
1000 W/cm2 1 cc/s water or other coolant
Ultra Fine Spray Vapor Nozzle DP 6 psi to 10
psi
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Spray Cooling Applications
High Energy Lasers
Power Electronics
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Laser Cooling

• DoD High Energy Lasers
• Illuminators and weapons
• Three main parts
• Laser, Power, Cooling

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RTI ESC Goals and Approach

• Complete solution from device cooling to heat
  rejection
• Reduced system weight, size and electrical
  consumption

• Front End
• ESC heat exchanger
• Nozzle array
• Compact, device specific packaging
• Back End
• Heat rejection
• High COP, compact and lightweight
• Integrated with Front End

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Two Phase Spray Cooling

• 1 cc/cm2
• (10 to 40x less)
• mass, volume, power savings
• DP10 psi (1.5 to 5x less)
• Low thermal resistance

Diode Lasers
Nozzle Array
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RTI Prototypes

• Large Area Prototypes
• Current 21 cm2
• 126 cm2 by September 03
• High Heat Flux
• R-134a, 200 W/cm2 _at_ 20 C
• NH3, 500 W/cm2 _at_ 20 C
• H20, 1000 W/cm2 _at_ 125 C
• Cycles
• Closed cycle refrigerated
• 1/2 - 1/3 weight and vol. of standard chillers
• Closed cycle non-refrigerated
• Open cycle, vent vapor to ambient 1/10 weight

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Soldier Cooling

• Army Natick Soldier Center
• 200 W of cooling
• Exterior cooling unit interfaces via liquid suit
• Very small, very light, very low energy
  consumption

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Microclimate Cooling System

• 200 Wc cooling
• 95 F (35 C) air
• 65 We electrical power
• 2 kg total weight
• Pump, 8-12 GPH, 8 psi
• 25 C water temp
• 1500 ml cooling system volume

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Microclimate Cooling System
Compressor
Condenser
Commercial off the shelf items
6 cm
Prototype Development
Missile
Army
Car- A/C
Fire Man
Computer
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• For information on additional technologies and
  programs please contact
• Daniel P. Rini
• [phone]
• Dan_at_RiniTech.com