Harvesting electrical energy from torsional thermal actuation driven by natural convection
2019-11-13 17:19:46 조회수171
Shi Hyeong Kim, Hyeon Jun Sim, Jae Sang Hyeon, Dongseok Suh, Geoffrey M. Spinks, Ray H. Baughman & Seon Jeong Kim Shi Hyeong Kim, Hyeon Jun Sim, Jae Sang Hyeon & Seon Jeong Kim: Center for Self-powered actuator and Department of Biomedical Engineering, Hanyang University, Seoul, 133-791, South Korea. Dongseok Suh: Department of Energy Science, Sungkyunkwan University, Suwon, Gyeonggido, 16419, South Korea. Geoffrey M. Spinks: Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong, New South Wales, 2522, Australia. Ray H. Baughman: The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX, 75083, USA. 원문 링크 :


The development of practical, cost-effective systems for the conversion of low-grade waste heat to electrical energy is an important area of renewable energy research. We here demonstrate a thermal energy harvester that is driven by the small temperature fluctuations provided by natural convection. This harvester uses coiled yarn artificial muscles, comprising well-aligned shape memory polyurethane (SMPU) microfibers, to convert thermal energy to torsional mechanical energy, which is then electromagnetically converted to electrical energy. Temperature fluctuations in a yarn muscle, having a maximum hot-to-cold temperature difference of about 13 °C, were used to spin a magnetic rotor to a peak torsional rotation speed of 3,000 rpm. The electromagnetic energy generator converted the torsional energy to electrical energy, thereby producing an oscillating output voltage of up to 0.81 V and peak power of 4 W/kg, based on SMPU mass.

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