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High power output based on watch-strap-shaped body heat harvester using bulk thermoelectric materials

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  • Park, Hwanjoo
  • Eom, Yoomin
  • Lee, Dongkeon
  • Kim, Jiyong
  • Kim, Hoon
  • Park, Gimin
  • Kim, Woochul

Abstract

This paper reports on the high power output of a watch strap-shaped body heat harvester and presents the detailed analysis of its performance. The device is made up of bulk thermoelectric materials and contains an integrated heat sink. When the device is worn on the wrist, it generates an output power of 6.97 μW/cm2 while the subject is walking. Theoretical analysis based on the human thermoregulatory model explains the high power output. Owing to the design of the body heat harvester, which can be adapted to conform to curved surfaces such as the skin and a screwed-down heat sink, an unprecedently low thermal contact resistance was achieved. Furthermore, the finned heat sink and high fill factor augmented the output power level. This research demonstrates the possibility of extracting body heat for operating wearable and/or implantable sensors made of bulk thermoelectric materials.

Suggested Citation

  • Park, Hwanjoo & Eom, Yoomin & Lee, Dongkeon & Kim, Jiyong & Kim, Hoon & Park, Gimin & Kim, Woochul, 2019. "High power output based on watch-strap-shaped body heat harvester using bulk thermoelectric materials," Energy, Elsevier, vol. 187(C).
    • Handle: RePEc:eee:energy:v:187:y:2019:i:c:s0360544219316196
    DOI: 10.1016/j.energy.2019.115935
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    References listed on IDEAS

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    Cited by:

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    3. Wei, Haoxiang & Zhang, Jian & Han, Yang & Xu, Dongyan, 2022. "Soft-covered wearable thermoelectric device for body heat harvesting and on-skin cooling," Applied Energy, Elsevier, vol. 326(C).
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    5. Liang, Jia & Huang, Muzhang & Zhang, Xuefei & Wan, Chunlei, 2022. "Structural design for wearable self-powered thermoelectric modules with efficient temperature difference utilization and high normalized maximum power density," Applied Energy, Elsevier, vol. 327(C).
    6. Chen, Jiangfan & Fang, Zheng & Azam, Ali & Wu, Xiaoping & Zhang, Zutao & Lu, Linhai & Li, Dongyang, 2023. "An energy self-circulation system based on the wearable thermoelectric harvester for ART driver monitoring," Energy, Elsevier, vol. 262(PA).
    7. Nozariasbmarz, Amin & Collins, Henry & Dsouza, Kelvin & Polash, Mobarak Hossain & Hosseini, Mahshid & Hyland, Melissa & Liu, Jie & Malhotra, Abhishek & Ortiz, Francisco Matos & Mohaddes, Farzad & Rame, 2020. "Review of wearable thermoelectric energy harvesting: From body temperature to electronic systems," Applied Energy, Elsevier, vol. 258(C).
    8. Lv, Jin-Ran & Ma, Jin-Lei & Dai, Lu & Yin, Tao & He, Zhi-Zhu, 2022. "A high-performance wearable thermoelectric generator with comprehensive optimization of thermal resistance and voltage boosting conversion," Applied Energy, Elsevier, vol. 312(C).
    9. Tian, Yu & Ren, Guang-Kun & Wei, Zhijie & Zheng, Zhe & Deng, Shunjie & Ma, Li & Li, Yuansen & Zhou, Zhifang & Chen, Xiaohong & Shi, Yan & Lin, Yuan-Hua, 2024. "Advances of thermoelectric power generation for room temperature: Applications, devices, materials and beyond," Renewable Energy, Elsevier, vol. 226(C).
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