Fabrication and Simulation of TE Modules for a Feasibility Study on Harvesting Solar Heat Energy from Roof Tiles
  • Sakorn Inthachai1, Supasit Paengson2, Jindaporn Jamradloedluk1,*, Tosawat Seetawan2,*
1 Solar Energy and Energy Resources Research Unit, Faculty of Engineering, Mahasrakham University, Khamriang, 44150, Thailand
2 Program of Physics, Faculty of Science and Technology, Thermoelectric Research Laboratory, Center of Excellence on Alternative Energy, Research and Development Institution, Sakon Nakhon Rajabhat University, Sakon Nakhon, 47000, Thailand
* Corresponding Authors: Jindaporn Jamradloedluk. Email: jindaporn.msu@gmail.com; Tosawat Seetawan. Email: t_seetawan@snru.ac.th
(This article belongs to this Special Issue:New Trends in Sustainable Materials for Energy Conversion, CO2 Capture and Pollution Control)
Received 26 December 2020; Accepted 26 February 2021 ; Published online 23 April 2021
Abstract
A novel roof tile thermoelectric generator (RT-TEG) was used to harvest electrical energy from a solar heat source. The RT-TEG was fabricated and simulated by flat and curved thermoelectric modules consisting of p-n junctions of p-Sb2Te3 and n-Bi2Te3, with an Al2O3 substrate at the top and bottom for heat absorption and heat rejection. The RT-TEG was installed in a roof tile to act as a generator. The electrical voltage and power values of the curved thermoelectric modules were higher than those of the flat thermoelectric module by 0.44 V and 80 mW, at a temperature difference (ΔT) of 100 K. In field tests, the RT-TEG produced a maximum electrical voltage of 33.70 mV and an electrical power of 46.24 μW at ΔT~7 K under a load resistance of 1 Ω under good sunshine at 13.00 hours. The energy conversion efficiency of RT-TEG was found to be 2.24 × 10−4.
Keywords
Roof tiles micro-generator; alternative energy; thermoelectric module; harvesting energy; conversion energy