Solar hybrid systems with thermoelectric generators

Chávez-Urbiola, Edgar Arturo; Vorobiev, Yu. V.; Булат, Л. П.

doi:10.1016/j.solener.2011.10.020

Cited by 187 publications

(68 citation statements)

References 17 publications

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“…Composite electrode materials were also studied from the point of view of maximizing thermionic emission and thermotunneling [8]. Practical realization of energy converters and coolers based on thermotunneling has been discussed in the works [9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Electroplating of Conformal Electrodes for Vacuum Nanogap Tunnel Junction

Jangidze¹,

Tavkhelidze²,

Blagidze³

et al. 2012

J. Electrochem. Soc.

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In this study, we electroplate Cu electrode on Si substrate to realize a large-area vacuum nanogap for electron tunneling. We used cathode coating, cathode rotation, asymmetric current regime, and electrolyte temperature stabilization to obtain the regular geometry of the Cu electrode and reduce its internal tension. Subsequently, internal tension was altered to achieve the predefined surface curvature (concave or convex). For 12-mm diameter Ag/Cu electrode, we achieve the curvature of 40 nm/mm from the Ag side. Reduction of the electrode diameter to 3 mm allowed curvature as low as of 2.5 nm/mm. It also allowed fabrication of two conformal electrodes having a nanogap of less than 5 nm wide, over the area of 7 mm 2 . Such electrodes can be used for efficient energy conversion and cooling in the mixed thermionic and thermotunneling regime.

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Section: Introductionmentioning

confidence: 99%

Electroplating of Conformal Electrodes for Vacuum Nanogap Tunnel Junction

Jangidze¹,

Tavkhelidze²,

Blagidze³

et al. 2012

J. Electrochem. Soc.

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“…ф cold = SI TEG T cold + 0.5I TEG 2 R TEG + TEG (T hot − T cold ) (12) ф hot = SI TEG T cold − 0.5I TEG 2 R TEG + TEG (T hot − T cold )…”

Section: Comsol Finite Element Modelunclassified

“…The heat input фhot and output фcold of TEG are determined by Equations (12) and (13), where kTEG, RTEG and ITEG are, respectively, the thermal conductivity, total resistance, and generated current of the thermoelectric generator module: ф cold = SI TEG T cold + 0.5I TEG R TEG + TEG (T hot − T cold ) (12) ф hot = SI TEG T cold − 0.5I TEG R TEG + TEG (T hot − T cold )…”

Section: Q Cold = Si Tec T Cold − 05i Tec R Tec − Tec (T Hot − T Colmentioning

confidence: 99%

“…Similar to TEC, TEG is a compact device with a noiseless simple design that has no moving organs [11]; it has been used generally in the industry as waste heat remedy [9], in vehicles [5][6][7][8][9][10], buildings (houses, restaurants, etc. ), and concentrated photovoltaic systems [12][13][14]. The electric power generation efficiency of the thermoelectric generators is governed by Equation (2) as follows [8]:…”

Section: Introductionmentioning

confidence: 99%

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Modeling and Experimentation of New Thermoelectric Cooler–Thermoelectric Generator Module

2018

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Abstract:In this work, a modeling and experimental study of a new thermoelectric cooler-thermoelectric generator (TEC-TEG) module is investigated. The studied module is composed of TEC, TEG and total system heatsink, all connected thermally in series. An input voltage (1-5 V) passes through the TEC where the electrons by means of Peltier effect entrain the heat from the upper side of the module to the lower one creating temperature difference; TEG plays the role of a partial heatsink for the TEC by transferring this waste heat to the total system heatsink and converting an amount of this heat into electricity by a phenomenon called Seebeck effect, of the thermoelectric modules. The performance of the TEG as partial heatsink of TEC at different input voltages is demonstrated theoretically using the modeling software COMSOL Multiphysics. Moreover, the experiment validates the simulation result which smooths the path for a new manufacturing thermoelectric cascade model for the cooling and the immediate electric power generation.

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“…In some cases, heat is recovered as such, through the co-generation of warm water [1][2][3]. Other approaches focus instead on the conversion of heat into electricity with the implementation of thermoelectric generators (TEGs) [4][5][6][7] through hybrid thermoelectric-photovoltaic systems (HTEPV).…”

Section: Introductionmentioning

confidence: 99%

Suitability of Electrical Coupling in Solar Cell Thermoelectric Hybridization

Lorenzi

Acciarri

Narducci

2018

Designs

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Abstract:It is well known that the major constraints to the efficiency of photovoltaic devices come from the generation of heat. In this context, thermoelectric generators have been proposed as a viable heat recovery solution, leading to an increase of the overall efficiency. Within this kind of hybrid solution, the photovoltaic and thermoelectric parts can be either electrically separated or connected in the same circuit. In the latter case, the presence of the thermoelectric generator in series to the solar cell may lead to electrical losses. In this work, we analyze the effect of several parameters on the output power of electrically hybridized thermoelectric-photovoltaic systems. Both electrical measurements and simulations are used. The results show that while an electrical lossless condition exists (as also reported in previous works), it does not necessarily lead to significant power gains compared to the sole photovoltaic case. In addition, the strong temperature sensitivity of the lossless condition makes electrical hybridization difficult to implement. Since solar irradiation varies over time, such sensitivity would make the system work mostly in a suboptimal regime. Therefore, this study provides clues on the actual applicability of electrically hybridized devices.

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Solar hybrid systems with thermoelectric generators

Cited by 187 publications

References 17 publications

Electroplating of Conformal Electrodes for Vacuum Nanogap Tunnel Junction

Electroplating of Conformal Electrodes for Vacuum Nanogap Tunnel Junction

Modeling and Experimentation of New Thermoelectric Cooler–Thermoelectric Generator Module

Suitability of Electrical Coupling in Solar Cell Thermoelectric Hybridization

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