PCM Composite Cold Plate Technology Description Thermal storage devices based on phase-change materials (PCMs) have traditionally been box-like structures with robust walls and PCM volume fractions <60%. The usefulness of such devices in aerospace thermal control applications is limited because of the bulkiness and weight. A far more useful configuration are thin (1-5 mm) PCM plates that can be readily integrated into electronic racks, focal planes, panels for radar and photovoltaic arrays, and in laser-hardened radiators. LEO satellites abound with thermal transients driven by periodic environmental and traffic loads, and lightweight thermal inertia in a thin PCM plate format is generally useful. Prior PCM art does not teach how to achieve both PCM containment and structural stability in thin plate structures. This project used an innovative design and non-woven fiber assembly methods to fabricate thin PCM composite plates with high PCM fraction for heat capacity, integral small-gauge heatpipes for high thermal conductivity, and good mechanical strength and stability. Potential Benefits The use of PCM technology can significantly reduce the size and weight of thermal storage components used for thermal management in aircraft and spacecraft. Development Status ESLI performed a Phase 1 SBIR contract with the U.S. Air Force to develop lightweight PCM-based thermal storage components for use in thermal control systems. In Phase 1, plates were fabricated and characterized both thermally and mechanically. Under Phase 2 work, ESLI is currently developing thermal control components based on thin-plate design and scaling-up production capability. Application to spacecraft thermal control, avionics and pulse power electronics is also being pursued and the potential benefits quantified.
U.S. Air Force Phase 1&2 SBIR (F29601-95-C-0098) |
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