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30 April 2007 Water cooling system using a piezoelectrically actuated flow pump for a medical headlight system
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The microchips inside modern electronic equipment generate heat and demand, each day, the use of more advanced cooling techniques as water cooling systems, for instance. These systems combined with piezoelectric flow pumps present some advantages such as higher thermal capacity, lower noise generation and miniaturization potential. The present work aims at the development of a water cooling system based on a piezoelectric flow pump for a head light system based on LEDs. The cooling system development consists in design, manufacturing and experimental characterization steps. In the design step, computational models of the pump, as well as the heat exchanger were built to perform sensitivity studies using ANSYS finite element software. This allowed us to achieve desired flow and heat exchange rates by varying the frequency and amplitude of the applied voltage. Other activities included the design of the heat exchanger and the dissipation module. The experimental tests of the cooling system consisted in measuring the temperature difference between the heat exchanger inlet and outlet to evaluate its thermal cooling capacity for different values of the flow rate. Comparisons between numerical and experimental results were also made.
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Rogério F. Pires, Sandro L. Vatanabe, Amaury R. de Oliveira, Paulo H. Nakasone, and Emílio C.N. Silva "Water cooling system using a piezoelectrically actuated flow pump for a medical headlight system", Proc. SPIE 6527, Industrial and Commercial Applications of Smart Structures Technologies 2007, 65270P (30 April 2007);

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