General Presentation 2012
MicroCool is a division of Wolverine Tube Inc. • A Rich History, A Solid Foundation, A Bold Future Wolverine has 90+ years history with decades long customer partnerships In 1935, Wolverine invented the first high performance heat transfer tubes and revolutionized the HVAC commercial chiller industry Wolverine is the premier heat transfer design partner for OEM’s Metal Joining and Brazing Products Global core markets served: HVAC, Refrigeration & Appliance, Water Heater/Boiler, Process & Chemical, Electronics Cooling Wolverine - MicroCool Confidential 2012
Wolverine Global Customer Partnerships Wolverine - MicroCool Confidential 2012
Wolverine Locations Wolverine - MicroCool Confidential 2012
MicroCool’s MDT technology originated from Wolverine’s tube surface enhancing technology Wolverine MDT MicroCool MDT Enhanced Enhanced Tube Flat Surface Wolverine - MicroCool Confidential 2012
MDT – Micro Deformation Technology • Patented tooling and process. • Work piece is cut, deformed and stretched by up to 150%. • No loss of material during the fining operation. • Fining is done without the addition of heat and can be done without lubrication if needed. • Little tooling or setup required, similar to CNC machining. Wolverine - MicroCool Confidential 2012
MDT Flexibility Fins per inch: 650-8 (255-3 Fins/Centimeter) Fin thickness to fin gap ratio: 1:1 – 1:3 Thk Gap Fin height to fin thickness ratio up to 15:1 Max fin gap: 1.2mm + Pins can be formed in either an in-line or staggered pattern. Pin diameter and gap vary from 1mm to 0.5mm Pin height to diameter ratio up to 8:1 Fins or pins can be applied over large surfaces up to 1X1 meter Fins or pins can be added in specific “island” locations or on across entire surface All of these options can be varied with little to no setup or tooling (a customer could easily try multiples of different fin or pin geometries with one fixture) 12 fins per inch (5 f/cm) Example 150 fins per inch (60 f/cm) 5 mm tall Pin array 1mm tall Wolverine - MicroCool Confidential 2012
MDT Geometry Options - Fins 4mm tall 4mm tall 50 fpi 25 fpi .25mm thk .5 mm thk .25 mm gap .5 mm gap Common Fin Pitches Design Flexibility • Fins can be created in both copper and aluminum 200 fpi = 0.0625mm thk • Fins can have knife edge or be flat (see above) 100 fpi = 0.125mm thk • Fins can be straight or slightly curved (see above) 50 fpi = 0.25mm thk • Back-wall minimum thickness 1mm 25 fpi = 0.5mm thk • Fin thickness to gap normally 1:1 but can vary 12 fpi = 1.0mm thk Wolverine - MicroCool Confidential 2012
MDT Geometry Options – Pins Staggered Pin In-line Pin ~1mm gap ~1mm gap • Pins can be staggered or in-line • Pins can be created from 12 FPI to 200fpi, [20fpi (0.5mm) shown to the left)] • Pins can be created on both aluminum and copper. • Pins can have pointed or flat tops (see above) Wolverine - MicroCool Confidential 2012
MDT Material Options Copper Aluminum Other 1000 series CuNi C110 3000 series Steel* C101 6000 series* Titanium* Most copper 7000 series* Plastics alloys Brass CTE materials** * More difficult **Limited success with current materials but open to R&D of new materials Wolverine - MicroCool Confidential 2012
MicroCool Products High Performance Full Cooling Loops IGBT Base Plates Cold plates Wolverine - MicroCool Confidential 2012
Thermal, Leak and Pressure Testing Wolverine - MicroCool Confidential 2012
CFD Simulation and Optimization • Flow Balancing • Fin and Pin Optimization Wolverine - MicroCool Confidential 2012
Future use of MDT Liquid cooling at IGBT substrate level Wolverine - MicroCool Confidential 2012
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