Journal
APPLIED ENERGY
Volume 283, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.apenergy.2020.116240
Keywords
Thermoelectric; Energy harvesting; Seebeck; Modeling; Peltier; Non-dimensional; Thermoelectric Generator (TEG)
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Funding
- Israel Ministry of Trade and Industry [Nofar]
- MECOROT LTD. - Israel water company
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This study presents the stages of modeling, development, optimization, assembling, and experimental validation of a thermoelectric harvester for powering low power-consuming nodes of a wireless sensor network. The experiments confirmed the energy output of the thermoelectric harvester under specific temperature difference conditions.
Low-temperature gradients between massive solids and ambient air are ubiquitous due to a diurnal temperature cycle. The use of these gradients as a source of renewable energy to power the low power-consuming nodes of a wireless sensor network instead of batteries can solve the problem of periodic replacement of batteries with their subsequent recycling. This study successively presents the stages of modeling, development, optimization, assembling, and experimental validation of a thermoelectric harvester for replacement of a 20 Ah battery for a wireless water quality sensor located on a water pipe. The experiments confirmed that the thermoelectric harvester produces more than 0.5-2 mW at a temperature difference of about 1-2 K between the pipe surface and the surrounding air at the calm wind speed of about 1 m/s. The original dimensionless model of thermoelectric harvester is presented herein. The key role of convective heat transfer in the harvesting process is demonstrated.
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