Cold Plate Section
12Pages

In a world of compact designs with increasing power densities, cold plates are satisfying demanding contact cooling requirements in applications as diverse as high-powered electronics, power generation, medical equipment, military and aerospace, and lasers. For high watt densities, when air-cooled heat sinks are inadequate, liquid-cooled cold plates are the ideal high-performance heat transfer solution. Lytron is at the forefront of cold plate innovation, offering three different cold plate technologies . With full custom design and build capabilities, plus over 15 standard product lines, Lytron can solve all your thermal challenges.

Custom Cold Plates Custom Cold Plates Custom Cold Plates for Mission Critical Power Electronics Cooling The drive towards higher power and more compact packages is making liquid cooling a necessity in many applications. Partnering with Original Equipment Manufacturers (OEMs), Lytron supplies custom cold plates for electronics cooling and other applications where high performance and high reliability are essential. Our cold plates, which include vacuum-brazed and Friction Stir Welded (FSW) performance-fin cold plates and chassis, flat tube cold plates, and tubed cold plates, can be found in...

Cold Plates Custom LPM 0 This graph compares the normalized thermal resistances of different cold plate technologies, enabling thermal performances to be compared independently of the part geometries. The better the performance, the lower the thermal resistance. Since many cold plates are customized, a range of typical values is shown for each technology. All performances are compared using water as the cooling fluid. A normalized performance chart for our standard cold plates can be found on page 39. Normalized Thermal Resistance (°C-in2/W) Performance comparison Tubed Technologies Flat...

Cold Plates Cold Plates Performance-fin aluminum and copper cold plates offer nearly unlimited customization opportunities. They can be precisely engineered to match your performance, pressure drop, and dimensional requirements. Since Lytron manufactures its own fin, we can customize the internal fin as well as the cold plate's fluid path, allowing us to engineer a truly optimized cold plate. In addition, Lytron provides surface machining and drilling that meets tight tolerances. Vacuum-brazed aluminum cold plate for power electronics cooling in a military application Performance-fin...

Cold Plates Custom Liquid-Cooled Chassis Liquid-cooled chassis are used in military, aerospace, and other high performance applications because they offer excellent heat transfer in a ruggedized, lightweight package. They are manufactured from aluminum cold plates that have aluminum fin vacuum-brazed or Friction Stir Welded (FSW) into the sidewalls. Since all of Lytron's liquid-cooled chassis are custom designed, we can supply you with the most efficient, compact, and lightweight part possible. The inlet and outlet locations, the fluid path, and the slot widths and configurations are all...

Custom Cold Plates Value-Added Cold Plate Assemblies Custom Cold Plates Our expertise goes well beyond components. We understand what is needed for seamless integration of your component into your system. An assembly can be as simple as a cold plate with hoses, or as complex as a cold plate with a heat exchanger, fans, and more. Value-added components may include: • • • • • • • • • • • Fittings/connectors Hoses/tubing Thermal interface material IGBT integration/bolting Orifices (for tight pressure drop tolerances) Valves Heat exchangers Pumps and reservoirs Drain ports Wiring harnesses...

Aluminum Vacuum-Brazed Cold Plates CP30 Dual-sided mounting Drillable mounting surface Very low thermal resistance due to large internal surface area Excellent thermal uniformity • Excellent performance: The CP30 contains high performance corrugated aluminum fin brazed into the cavity beneath the mounting surface of the cold plate. The fin creates turbulence, which minimizes the fluid boundary layer and reduces thermal resistance. • Ideal for prototyping: The CP30 is a standard part designed for prototyping purposes. The cold plate is flat on both sides to allow dual-sided mounting, and the...

CP20 & CP25 Flat Tube Cold Plates Excellent thermal uniformity as fluid flows beneath the entire cold plate surface Standard Cold Plates Flat tube microchannels, also called “internal fin” Flat tube cold plates are compact cold plates that offer extremely low thermal resistance. They contain internal fin to increase performance and offer excellent thermal uniformity as coolant flows below the entire surface. They are ideal for cooling small, high watt-density components such as thermoelectric modules. We offer both an aluminum solution (the CP20) and a copper solution (the CP25, or...

Press-Lock™ Tubed Cold Plates CP10, CP12 & CP15 Single tube with no joints ensures leak-free operation Available with straight or beaded fittings Press-Lock™ technology locks tube into channeled aluminum extrusion without performance-limiting epoxy Drillable plate for component mounting • Superior thermal performance: Our tubed cold plates are manufactured using Lytron’s proprietary Press-Lock technology, which mechanically locks the tubes into the aluminum plate. Press-Lock technology eliminates the need for performance-limiting epoxy between the tube and the plate, resulting in superior...

Cold Plate Drawings CP30 DRILL SIDE DRILL THRU PERMISSABLE NO DRILLING PERMISSABLE IN HATCHED AREAS IN DOUBLE HATCHED AREA Actual mounting surface 2˝ x 2˝ (50 mm x 50 mm) ALLOWABLE DRILL DEPTH .50 MAX. THIS SIDE ONLY Standard Cold Plates PDFs, IGS files, and eDrawings of standard cold plates are available at www.Lytron.com. Main dimensional label is inches. Dimension in parentheses is mm.

Cold Plate Performance Graphs, Specifications, and Fittings Thermal resistance is normally expressed as °C per Watt. Thermal resistance describes how much hotter the surface of a cold plate is relative to the temperature of the fluid flowing through the cold plate, under a given thermal load. Our performance curves show the local thermal resistance—the surface temperature versus the local liquid temperature. Full details on thermal resistance calculations and how to select a cold plate technology are on page 40. 1. Thermal resistance is inversely proportional to area. To find the thermal...