Thermal Management System developed for aerospace carriers (missile, aircraft, space station), bounds processes of generation and dissipation, transfer and conversion of power, refrigeration, and of bio-metabolism related substances. Local ecosystem of the carrier combines technological and biological subsystems, interacting with internal and outer spaces. The conceptual IETM System performs recovery of waste thermal energy, generation of “free” refrigeration, and recovery of byproducts into safe coolants (ammonia - water). Thermal Management solutions include novel technologies of intensification of the heat transfer and of conversion of the waste resources into refrigeration for extension of cooling capabilities for high heat radars, lasers and microwave generators. The IETM includes Vacuum-Evaporative Refrigeration (VER) utilizing “free natural” vacuum and waste heat-activated refrigeration circuits. VER generates ~1000 Btu of “free” cold per pound of wastewater or ammonia. The introduced high performance microstructure of compound electrohydrodynamic (EHD) boundary microsystems intensifies nucleate boiling, preventing dryout. The coils of the microwires adjoin to the boiling surface and form precision microstructure of heat sink with microchannels between the coils and the surface. The microcavities form the active bubbling nucleation sites along the spiral zones of contacts of the microwires and basic surfaces. The fins-microelectrodes develop additional heat transfer surface and evenly distributed spiral zones of the nucleation sites. Like fibers of a fine wick, the electric forces in EHD capillary structures of the microelectrodes retain the liquid and push out generated vapor bubbles from the surface. Good manufacturability and performance of novel MEMS are based on well-developed materials and common winding technology “borrowed” from electrotechnical industry. Conversion of waste resources into refrigeration and EHD activation of boiling allow meeting strong limitations in weight, reliability and consumption of energy. These conceptual approaches provide diversities in refrigeration capabilities for IETM.

Volume Subject Area:
Advanced Energy Systems
Keywords:
electronics cooling, intensification, boiling, boundary EHD, microstructure, magnet wire, industrial, Vacuum-Evaporative Refrigeration
Topics:
Aerospace industry, Boiling, Refrigeration, Vacuum, Heat, Heat transfer, Microelectromechanical systems, Nucleation (Physics), Thermal management, Aircraft, Bubbles, Circuits, Computer cooling, Coolants, Cooling, Electrohydrodynamics, Energy consumption, Energy conversion, Energy dissipation, Fibers, Fins, Generators, Heat sinks, Lasers, Magnet wire, Microchannels, Microwaves, Missiles, Nucleate boiling, Reliability, Sewage, Space, Space stations, Thermal energy, Vapors, Water, Weight (Mass), Winding (process)
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