Harvesting temperature fluctuations as electrical energy using torsional and tensile polymer muscles
2016-10-24 17:47:35 조회수1207
Shi Hyeong Kim(a), Ma ´rcio D. Lima(b), Mikhail E. Kozlov(b), Carter S. Haines(b), Geoffrey M. Spinks(c), Shazed Aziz(c), Changsoon Choi(a), Hyeon Jun Sim(a), Xuemin Wang(d), Hongbing Lu(d), Dong Qian(d), John D. W. Madden(e), Ray H. Baughman(b)*, and Seon Jeong Kim(a)* (a)Center for Bio-Artificial Muscle and Department of Biomedical Engineering, Hanyang University, Seoul 133-791, South Korea. E-mail: (b)Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX 75083, USA. E-mail: (c)Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong, New South Wales 2522, Australia (d)Department of Mechanical Engineering, University of Texas at Dallas, Richardson, TX 75080, USA (e)Department of Electrical and Computer Engineering and Advanced Material and Process Engineering Laboratory, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada 원문 링크 :!divAbstract


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 mm-diameter nylon muscle fiber can be driven by 16.7 1C 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 1C, 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 kg1 and 28 W kg1, respectively.

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