skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: High Power Density Body Heat Energy Harvesting

Abstract

Thermoelectric generators (TEGs) can convert body heat into electricity, thereby providing a continuous power source for wearable and implantable devices. For wearables, the low fill factor (area occupied by legs over the TEG base area) TEG modules are relevant as they provide large thermal gradient across the legs and require less material, which reduces the cost and weight. However, TEGs with a fill factor below 15% suffer from reduced mechanical robustness; consequently, commercial modules are usually fabricated with a fill factor in the range of 25-50%. In this study, TEG modules with a low and high fill factor are demonstrated and their performance is compared in harvesting body heat. Fabricated modules demonstrate ~80% output power enhancement as compared to commercially available designs, resulting in high power density of up to 35 uW/cm2 in a steady state. This enhanced power is achieved by using two-third less thermoelectric materials in comparison to commercial modules. These results will advance the ongoing development of wearable devices by providing a consistent high specific power density source.

Authors:
 [1]; ORCiD logo [2];  [1];  [1];  [1];  [3];  [1]
  1. Pennsylvania State University
  2. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
  3. Virginia Tech
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
U.S. Department of Defense (DOD), Office of Naval Research
OSTI Identifier:
1572269
Report Number(s):
NREL/JA-5500-75265
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Journal Article
Journal Name:
ACS Applied Materials & Interfaces
Additional Journal Information:
Journal Name: ACS Applied Materials & Interfaces
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; thermoelectric generator; body heat; energy harvesting; wearables; fill factor; self-powered; contact resistance

Citation Formats

Nozariasbmarz, Amin, Kishore, Ravi A, Poudel, Bed, Saparamadu, Udara, Li, Wenjie, Cruz, Ricardo, and Priya, Shashank. High Power Density Body Heat Energy Harvesting. United States: N. p., 2019. Web. doi:10.1021/acsami.9b14823.
Nozariasbmarz, Amin, Kishore, Ravi A, Poudel, Bed, Saparamadu, Udara, Li, Wenjie, Cruz, Ricardo, & Priya, Shashank. High Power Density Body Heat Energy Harvesting. United States. doi:10.1021/acsami.9b14823.
Nozariasbmarz, Amin, Kishore, Ravi A, Poudel, Bed, Saparamadu, Udara, Li, Wenjie, Cruz, Ricardo, and Priya, Shashank. Wed . "High Power Density Body Heat Energy Harvesting". United States. doi:10.1021/acsami.9b14823.
@article{osti_1572269,
title = {High Power Density Body Heat Energy Harvesting},
author = {Nozariasbmarz, Amin and Kishore, Ravi A and Poudel, Bed and Saparamadu, Udara and Li, Wenjie and Cruz, Ricardo and Priya, Shashank},
abstractNote = {Thermoelectric generators (TEGs) can convert body heat into electricity, thereby providing a continuous power source for wearable and implantable devices. For wearables, the low fill factor (area occupied by legs over the TEG base area) TEG modules are relevant as they provide large thermal gradient across the legs and require less material, which reduces the cost and weight. However, TEGs with a fill factor below 15% suffer from reduced mechanical robustness; consequently, commercial modules are usually fabricated with a fill factor in the range of 25-50%. In this study, TEG modules with a low and high fill factor are demonstrated and their performance is compared in harvesting body heat. Fabricated modules demonstrate ~80% output power enhancement as compared to commercially available designs, resulting in high power density of up to 35 uW/cm2 in a steady state. This enhanced power is achieved by using two-third less thermoelectric materials in comparison to commercial modules. These results will advance the ongoing development of wearable devices by providing a consistent high specific power density source.},
doi = {10.1021/acsami.9b14823},
journal = {ACS Applied Materials & Interfaces},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {10}
}