Harvesting Electrical Energy from Torsional Thermal Actuation Driven by Natural Convection

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dc.contributor.ORCID0000-0001-5845-5137 (Baughman, RH)
dc.contributor.authorKim, Shi Hyeong
dc.contributor.authorSim, Hyeon Jun
dc.contributor.authorHyeon, Jae Sang
dc.contributor.authorSuh, Dongseok
dc.contributor.authorSpinks, Geoffrey M.
dc.contributor.authorBaughman, Ray H.
dc.contributor.authorKim, Seon Jeong
dc.contributor.utdAuthorBaughman, Ray H.
dc.contributor.utdAuthorKim, Seon Jeong
dc.date.accessioned2019-07-26T17:28:33Z
dc.date.available2019-07-26T17:28:33Z
dc.date.created2018-06-07
dc.description.abstractThe 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 ⁰C, 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.
dc.description.departmentSchool of Natural Sciences and Mathematics
dc.description.departmentAlan G. MacDiarmid NanoTech Institute
dc.description.sponsorshipSupport in the USA was from Air Force Grant AOARD-FA2386-13-4119, Air Force Office of Scientific Research grant FA9550-15-1-0089, and Robert A. Welch Foundation grant AT-0029
dc.identifier.bibliographicCitationKim, Shi Hyeong, Hyeon Jun Sim, Jae Sang Hyeon, Dongseok Suh, et al. 2018. "Harvesting electrical energy from torsional thermal actuation driven by natural convection." Scientific Reports 8(1): art. 8712, doi:10.1038/s41598-018-26983-4
dc.identifier.issn2045-2322
dc.identifier.issue1
dc.identifier.urihttps://hdl.handle.net/10735.1/6745
dc.identifier.volume8
dc.language.isoen
dc.publisherNature Publishing Group
dc.relation.urihttp://dx.doi.org/10.1038/s41598-018-26983-4
dc.rightsCC BY 4.0 (Attribution)
dc.rights©2018 The Authors
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.source.journalScientific Reports
dc.subjectNanotubes
dc.subjectMuscles--Artificial
dc.subjectNanofibers
dc.subjectPower resources
dc.subjectGeothermal resources
dc.titleHarvesting Electrical Energy from Torsional Thermal Actuation Driven by Natural Convection
dc.type.genrearticle

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