Theoretical and Experimental Evaluation of a Thermoelectric Generator Using Concentration and Thermal Energy Storage

To improve the thermoelectric conversion efficiency of solar thermoelectric power, a concentration solar thermoelectric generator (CTEG) unit based on concentrating and storing energy is designed. A Fresnel lens is used to concentrate thermal energy, and a phase change material (PCM) is used to store thermal energy to increase the temperature difference between the hot and cold ends of thermoelectric (TE) sheets. The heat stored in the PCM container will help to generate continuous solar energy at night and improve the thermal power conversion efficiency of the TEGs. The energy conversion equilibrium equation is established for the CTEG unit. By numerical calculation, we conclude that the absorption rate of the coating surface is reduced by 0.1 and the maximum thermoelectric conversion efficiency is reduced by approximately 0.4%. By selecting different heights of the heat exchanger, the unit supplies 1.025 v, 0.4204 v and 0.299 v open circuit voltages on average for approximately 30, 44 and 53 minutes, respectively. Therefore, the height of the heat exchanger affects the rate of heat energy absorption and release. The reversible operation of the CTEG-PCM unit is conducive to the day and night operation of solar power generation and is more suitable to solving the self-supplying power problem for wireless temperature sensors in forests.

[1]  M. Kalteh,et al.  Investigating the influence of Thomson effect on the performance of a thermoelectric generator in a waste heat recovery system , 2019, International Journal of Green Energy.

[2]  U. Drofenik,et al.  Optimization of Phase Change Material Heat Sinks for Low Duty Cycle High Peak Load Power Supplies , 2012, IEEE Transactions on Components, Packaging and Manufacturing Technology.

[3]  Thomas Becker,et al.  Three-Dimensional Printed Insulation For Dynamic Thermoelectric Harvesters With Encapsulated Phase Change Materials , 2017, IEEE Sensors Letters.

[4]  Ali Akbar Ranjbar,et al.  Experimental investigation of two-stage thermoelectric generator system integrated with phase change materials , 2017 .

[5]  Leland Weiss,et al.  Micro solar energy harvesting using thin film selective absorber coating and thermoelectric generators , 2013 .

[6]  Pendar Samadian,et al.  Cogeneration solar system using thermoelectric module and fresnel lens , 2014 .

[7]  Minking K. Chyu,et al.  Mathematical modeling and numerical characterization of composite thermoelectric devices , 2013 .

[8]  Brendan O'Flynn,et al.  Thermoelectric Energy Harvesting for Building Energy Management Wireless Sensor Networks , 2013, Int. J. Distributed Sens. Networks.

[9]  Wei Zhu,et al.  A novel thermoelectric harvester based on high-performance phase change material for space application , 2017 .

[10]  Tielin Shi,et al.  Novel integration of carbon counter electrode based perovskite solar cell with thermoelectric generator for efficient solar energy conversion , 2017 .

[11]  Mingjie Guan,et al.  Design and experimental investigation of a low-voltage thermoelectric energy harvesting system for wireless sensor nodes , 2017 .

[12]  Francis Agyenim,et al.  A review of materials, heat transfer and phase change problem formulation for latent heat thermal energy storage systems (LHTESS) , 2010 .

[13]  Eric M. Yeatman,et al.  Design and Fabrication of Heat Storage Thermoelectric Harvesting Devices , 2014, IEEE Transactions on Industrial Electronics.

[14]  Qi Zhang,et al.  Solar micro-energy harvesting based on thermoelectric and latent heat effects. Part II: Experimental analysis , 2010 .

[15]  Maciej Jaworski,et al.  Experimental investigation of thermoelectric generator (TEG) with PCM module , 2016 .

[16]  R. Dhanuskodi,et al.  Experimental investigation of solar reversible power generation in Thermoelectric Generator (TEG) using thermal energy storage , 2019, Energy for Sustainable Development.

[17]  C. Lertsatitthanakorn,et al.  Increasing the Efficiency of a Thermoelectric Generator Using an Evaporative Cooling System , 2017, Journal of Electronic Materials.

[18]  Zoran Prijić,et al.  Characterization of commercial thermoelectric modules for application in energy harvesting wireless sensor nodes , 2017 .

[19]  Joseph W. Matiko,et al.  Review of the application of energy harvesting in buildings , 2013 .

[20]  Suat U. Ay,et al.  Alternative power sources for remote sensors: A review , 2014 .

[21]  Qiang Li,et al.  Experimental investigation on potential of a concentrated photovoltaic-thermoelectric system with phase change materials , 2017 .

[22]  Christophe Goupil,et al.  Comparison of different modeling approaches for thermoelectric elements , 2013 .

[23]  P. Li,et al.  Validation of discrete numerical model for thermoelectric generator used in a concentration solar system , 2015 .

[24]  K. Atik,et al.  Numerical Simulation of a Solar Thermoelectric Generator , 2011 .

[25]  Lasse Rosendahl,et al.  Protection and thermal management of thermoelectric generator system using phase change materials: An experimental investigation , 2018, Energy.

[26]  Abraham Kribus.  Thermal Integral Micro-Generation Systems for Solar and Conventional Use , 2002 .

[27]  Zhan-jun Liu,et al.  Modified phase change materials used for thermal management of a novel solar thermoelectric generator , 2020 .

[28]  Lan Xiao,et al.  Theoretical modeling of thermoelectric generator with particular emphasis on the effect of side surface heat transfer , 2016 .

[29]  Wei-Hsin Chen,et al.  Design of heat sink for improving the performance of thermoelectric generator using two-stage optimization , 2012 .

[30]  Dongliang Zhao,et al.  Experimental evaluation of a prototype thermoelectric system integrated with PCM (phase change material) for space cooling , 2014 .