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Thermoelectric Waste Heat Recovery in Notebook Computers - Optimization and Limitation
Keywords: Waste heat recovery, Thermoelectric power generation, System optimization
A decade ago, the interest of saving power in a notebook computer was to extend the battery operation time by the self-contained-system which converts the waste heat energy back into the electricity driving cooling fan for CPU thermal management. Now, power recovery from waste heat takes more attention as a renewable and clean source in the electronics equipments. However, there is a significant limitation of using the waste heat from any device which has the maximum allowable temperature. Also, power harvesting performance is quite depends on how the output power is used in the system. The output is maximized at electrical impedance match as well as thermal impedance match. These are explained by the developed analytic model. Finally, the optimum output is determined by simple formula. The talk will go over the development of the thermoelectric power generation model, introduction of previous research on a notebook computer and the comparison with theoretical optimum.
Kazuaki Yazawa,
University of California Santa Cruz
Santa Cruz, CA

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