![]() In order to solve this problem, the optical concentrator and the cooling systems have been introduced to maintain the temperature difference across a thermoelectric generator. Although TEG have the potential to be used in a variety of areas and to supply electrical power for low-power components, the relatively low conversion efficiency has become its primary limitation. While they mainly focuses on the photovoltaic-thermoelectric hybrid systems, wearable thermoelectric generators, and the power supply for underwater gliders and wireless sensors. ![]() So far, a mass of studies on thermoelectric generator (TEG) have been carried out because of its many advantages such as no noise, no extra waste and low cost and so on. Waste heat or solar energy could be directly converted into electricity using thermoelectric generator devices that utilize the Seebeck effect. ![]() In recent years, Thermoelectricity has been the core of green energy and sustainable energy application which mainly focus on energy sources, energy transmission and thermodynamic materials conversion. While thermal energy is the most potential alternative because of higher efficiency and lower costs. The replacement of fossil fuels with sustainable energy sources has attracted increasing interest in recent years. Meeting future energy demands using renewable and green technologies is a significant global challenge. Reflectivity of absorbing coating η sys,Įlectrical efficiency of the system η teg,Įlectrical efficiency of the TEG module ρ, Stefan–Boltzmann constant (W m -2 k -4) ε, Temperature of selective absorbing coating surface (K) T w,Ībsorptivity of absorbing coating α teg, Temperature of the hot side of TEG (K) T sac, Temperature of cold side of TEG (K) T ct, Thermal contact resistance between TEG and aluminum plate (K W -1) S 1,Ĭross section area of aluminum plate (m 2) S 2, Thermal contact resistance between selective absorbing coating and aluminum plate (K W -1) R teg− Al, Thermal resistance of the aluminum plate (K W -1) R load, Solar energy absorbed by selective absorbing coating (W) Q rad,Įnergy that passed in hot side of the TEG (W) Q tegl,Įnergy that passed out of cold side of the TEG (W) R Al, Thermal conductivity of TEG (W m -1 k -1) L, Thermal conductivity of aluminum plate (W m -1 k -1) k teg, This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.ĭata Availability: All relevant data are within the manuscript.įunding: National Science Foundation of China (31670716) China Postdoctoral Science Special Foundation (2016T90044) China Postdoctoral Science Foundation (2015M570945) The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.Ĭompeting interests: The authors have declared that no competing interests exist.Īrea of selective absorbing coating A f,Ĭross-sectional area of a p or n leg (m 2) C,Ĭoefficient of convection heat transfer (W/(m 2 k)) h cov− Al,Ĭoefficient of convection heat transfer (W/(m 2 k)) h rad,Ĭoefficient of radiation heat transfer (W/(m 2 k)) I, Received: SeptemAccepted: ApPublished: May 5, 2020Ĭopyright: © 2020 Zhang et al. PLoS ONE 15(5):Įditor: Mauro Villarini, Universita degli Studi della Tuscia, ITALY Besides, this system offers powering solution for self-power miniature devices that are applied in aqueous environment.Ĭitation: Zhang Y, Zhang Z, Wu Y, Ga L, Xu D, Li W (2020) Research on a floating thermoelectric power generator for use in wetland monitoring. The low power wireless networks, used in wetland environments, could be operated by the thermoelectric power generated by the floating device. In addition, compared with the system without wind, the output power was increased by approximately 10.96% in our system. When subjected to solar irradiation of 896.38 W/m 2, the device generated a potential difference of 381.03 mV and a power output of 8.86 mW via thermoelectric generation. The effects of solar irradiation, temperature distribution, load resistance, wind speed, the maximum power and the electrical efficiency of the thermoelectric power generator were analyzed. Meanwhile two vertical axis rotors were used to cool the cold side of the thermoelectric power generator by catching the breeze. Fresnel lenses were applied to concentrate solar irradiation on a selective absorbing coat. Once there is a temperature difference between the upper surface exposed to sunlight and the lower surface in the water, the device is capable of generating power while floating in the wetland environment. A floating power generation device is designed and fabricated to overcome the power supply limitations of wireless sensor networks for environmental monitoring.
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