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Energy Scavenging (Harvesting) Methods
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VPI is a Electrical Engineer and Computer Scientist, Micro-Electro-Mechanical Systems (MEMS) Specialist, Micro-fuel Cell Technology Consultant, RF and High-Frequency Packaging Technology Consultant with world-class expertise in technology related to micro-fuel cells for portable applications, military research, micromachined silicon pressure diaphragms, RF and high-frequency packaging, diffractive optics for fiber-optic networking, micromirror arrays for projection displays, acoustic imaging for medical diagnostics, and automated package testing of IC's & MEMS.
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Alternative energy sources have become important for energy conservation, environmental preservation, increased energy demands, and low-power electronics, and at scales both large and small. Our recent analysis of energy scavenging (harvesting) methods for driving long-term sensor deployment were used by the federal government to drive initiatives in microtechnology based thermoelectrics, photovoltaics (solar cells), vibration energy, and fuel cells.
Technology selection is driven almost exclusively by the end application and its operating environment, with each approach having advantages or disadvanges in cost, size, weight, and power density. Physics set an ultimate limit to total available energy (TAE) density, which for example in the case of thermoelectrics are limited by the Carnot efficiency, and hence, find the best utility in environments having large thermal gradients, e.g. combustion engines and computer CPU's. Our recommendation was that energy scavenging must incorporate system requirements, and in some case drive them, where focued efforts are placed on decreasing power requirements, especially in telemetry, improving electronics, and reducing quiescent power dissipation in low-duty cycle sensors. Off-the-self scavenging techniques are not widely available and materials improvements will be important to improve efficiency. The government will remain an important catalyst until costs are driven down and electronics find an effective way to integrate with these energy sources.
Read other articles by this KKAI Associate:
FEA and Modeling of Mechanical Microstructures
| Electrical Engineer and Computer Scientist, Micro-Electro-Mechanical Systems (MEMS) Specialist, Micro-fuel Cell Technology Consultant, RF and High-Frequency Packaging Technology Consultant, technology related to micro-fuel cells for portable applications, military research, micromachined silicon pressure diaphragms, RF and high-frequency packaging, diffractive optics for fiber-optic networking, micromirror arrays for projection displays, acoustic imaging for medical diagnostics, and automated package testing of IC's & MEMS. | |
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Kevin Kennedy & Associates, Inc.
Rapid Response Engineering® Solutions
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