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Harvesting temperature fluctuations as electrical energy using torsional and tensile polymer muscles

Title
Harvesting temperature fluctuations as electrical energy using torsional and tensile polymer muscles
Author
김선정
Issue Date
2015-09
Publisher
ROYAL SOC CHEMISTRY
Citation
ENERGY & ENVIRONMENTAL SCIENCE, v. 8, NO 11, Page. 3336-3344
Abstract
Diverse means have been deployed for harvesting electrical energy from mechanical actuation produced by low-grade waste heat, but cycle rate, energy-per-cycle, device size and weight, or cost have limited applications. We report the electromagnetic harvesting of thermal energy as electrical energy using thermally powered torsional and tensile artificial muscles made from inexpensive polymer fibers used for fishing line and sewing thread. We show that a coiled 27 mu m-diameter nylon muscle fiber can be driven by 16.7 degrees C air temperature fluctuations to spin a magnetic rotor to a peak torsional rotation speed of 70000 rpm for over 300000 heating-cooling cycles without performance degradation. By employing resonant fluctuations in air temperature of 19.6 degrees C, an average output electrical power of 124 W per kg of muscle was realized. Using tensile actuation of polyethylene-based coiled muscles and alternating flows of hot and cold water, up to 1.4 J of electrical energy was produced per cycle. The corresponding per cycle electric energy and peak power output, per muscle weight, were 77 J kg(-1) and 28 W kg(-1), respectively.
URI
http://pubs.rsc.org/en/Content/ArticleLanding/2015/EE/C5EE02219C#!divAbstracthttp://hdl.handle.net/20.500.11754/27382
ISSN
1754-5692; 1754-5706
DOI
10.1039/c5ee02219c
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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