Journal
JOURNAL OF POWER SOURCES
Volume 208, Issue -, Pages 322-327Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2012.02.035
Keywords
Microbial fuel cell (MFC); Energy harvesting; DC/DC converter; Synchronous boost converter
Funding
- University of Colorado Denver College of Engineering and Applied Science
- Office of Naval Research (ONR) [N000140910944]
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Microbial fuel cells (MFCs) convert chemical energy stored in biodegradable substrates into direct electricity, which can be used to power remote sensors or offset the energy used during wastewater treatment. Power electronic converters have been developed to replace external resistors and harvest and store energy from MFCs, which is a significant improvement in MFC studies because external resistors only demonstrate power generation potential without actually capturing usable energy. However, the efficiency of conventional diode based energy harvester is low due to the high power loss of the diode. This study presents a synchronous boost converter based MFC energy harvester using a P-channel MOSFET, which improved the converter efficiency by 73%, from 43.8% to 75.9%. A modified hysteresis controller was developed to provide precise control during energy harvesting and operating and also prevented reverse current flows. (C) 2012 Elsevier B.V. All rights reserved.
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