Piezoelectric Fan Cooling for Enhancement of LED #39;s
Piezoelectric Fan Cooling for Enhancement of LED #39;s This is an i4Energy Seminar Speaker: Alic Chen, UC Berkeley Sponsors: CITRIS (Ctr for Info Technology Research in the Interest of Society), i4Energy Center With the increasing global demand for more efficient lighting solutions, light emitting diodes (LED #39;s) have gained widespread adoption in both consumer and industrial lighting markets. While LED #39;s have proven efficiency and longevity, such performance enhancements are highly correlated to their operating temperatures. While LED #39;s do not produce infrared (IR) radiation, more than 60% of the input power is lost as heat. In order to maximize LED brightness (lumen output) and lifetime, it is essential to reduce the junction temperature through effective thermal management. Typical thermal management methods include passive heat-sinking and conventional fan cooling. While passive heat-sinks provide a noise-less solution to excess heat, natural convection does not provide sufficient cooling for higher powered LED systems. Fan cooling provides forced convection for effective cooling while taking advantage of well-established heat-sink design guidelines developed by the electronic industry. However, the improvement from fan cooling comes at a trade-off between acoustic noise and fan speed. Piezoelectric fans can potentially provide low-noise and long-term cooling solutions for modern LED systems. A piezoelectric fan consists of a piezoelectric cantilever beam with a longer ...From:citrisucViews:13 0ratingsTime:28:51More inScience Technology<\/p>\n
Excerpt from: Piezoelectric Fan Cooling for Enhancement of LED's Piezoelectric Fan Cooling for Enhancement of LED's This is an i4Energy Seminar Speaker: Alic Chen, UC Berkeley Sponsors: CITRIS (Ctr for Info Technology Research in the Interest of Society), i4Energy Center With the increasing global demand for more efficient lighting solutions, light emitting diodes (LED's) have gained widespread adoption in both consumer and industrial lighting markets. While LED's have proven efficiency and longevity, such performance enhancements are highly correlated to their operating temperatures Continue reading
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