The effect of temperature mismatch on thermoelectric generators electrically connected in series and parallel

Montecucco, Andrea; Siviter, Jonathan; Knox, Andrew R.

doi:10.1016/j.apenergy.2014.02.030

Cited by 184 publications

(94 citation statements)

References 27 publications

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“…Not only the temperature gradient for each single TEG module is significant, 3 but the overall efficiency of the complete TEG-system is depending on the kind of electrical connection of TEG modules at different temperature gradients when connecting them to a single system. Montecucco et al 4 explored the influence on the electrical performance of the system connecting TEG modules at different temperature gradients in series or in parallel. For three TEG modules, each at a different temperature gradient of 100 K, 150 K, and 200 K, respectively, they measured a reduction of electrical power.…”

Section: Introductionmentioning

confidence: 99%

Development of a System for Thermoelectric Heat Recovery from Stationary Industrial Processes

Ebling

Krumm

Pfeiffelmann

et al. 2016

Journal of Elec Materi

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The hot forming process of steel requires temperatures of up to 1300°C. Usually, the invested energy is lost to the environment by the subsequent cooling of the forged parts to room temperature. Thermoelectric systems are able to recover this wasted heat by converting the heat into electrical energy and feeding it into the power grid. The proposed thermoelectric system covers an absorption surface of half a square meter, and it is equipped with 50 Bismuth-Telluride based thermoelectric generators, five cold plates, and five inverters. Measurements were performed under production conditions of the industrial environment of the forging process. The heat distribution and temperature profiles are measured and modeled based on the prevailing production conditions and geometric boundary conditions. Under quasi-stationary conditions, the thermoelectric system absorbs a heat radiation of 14.8 kW and feeds electrical power of 388 W into the power grid. The discussed model predicts the measured values with slight deviations.

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Section: Introductionmentioning

confidence: 99%

Development of a System for Thermoelectric Heat Recovery from Stationary Industrial Processes

Ebling

Krumm

Pfeiffelmann

et al. 2016

Journal of Elec Materi

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show abstract

“…Considering that when TEGs in the same branch are subjected to temperature mismatch, a significantly reduction of the expected performance of each TEG [28] and, consequently, a significant loss of model accuracy can be produced, the interconnection effect has been included into the new model presented in this paper.…”

Section: Model Descriptionmentioning

confidence: 99%

“…In those cases, the effect observed in Refs. [28,29] was not present because TEGs were not electrical interconnected. Hence, electrical series-parallel interconnection of the TEG array was not implemented into the model, as it was the thermal seriesparallel configuration.…”

Section: Introductionmentioning

confidence: 98%

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Modelling and analysis of longitudinal thermoelectric energy harvesters considering series-parallel interconnection effect

Massaguer¹,

Massaguer

Pujol

et al. 2017

Energy

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“…Moreover, studies of TEM characteristics and optimization have become popular. [3][4][5][6] In the thermoelectric field, the maximum power point tracking (MPPT) technique is popular, enabling the power output from the external TEM array to be controlled to obtain the optimum output power. 7,8 The design and optimization of the TEM array, however, must aid in controlling the output power from its interior through the array configuration and a series of circuit parameter values.…”

Section: Introductionmentioning

confidence: 99%

Structure and Output Characteristics of a TEM Array Fitted to a Fin Heat Exchanger

Zhang

Chen

et al. 2015

Journal of Elec Materi

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In the design of a thermoelectric generator, both the heat transfer area and the number of thermoelectric modules (TEMs) should be increased accordingly as the generator power increases; crucially, both aspects need to be coordinated. A kilowatt thermoelectric generator with a fin heat exchanger is proposed for use in a constant-speed diesel generator unit. Interior fins enhance convective heat transfer, whereas an exterior fin segment increases the heat transfer area. The heat transfer surface is double that of a plane heat exchanger, and the temperature field over the exterior fins is constrained to a one-dimensional distribution. Between adjoining exterior fins, there is a cooling water channel with trapezoid cross-section, enabling compact TEMs and cooling them. Hence, more TEMs are built as a series-parallel array of TEMs with lower resistance and more stable output current. Under nonuniform conditions, to prevent circulation and energy loss, bypass diodes and antidiodes are added. Experiments and numerical calculations show that, with matching and optimization of the heat exchanger and TEM array, a stable maximum output power is obtainable from the interior of the thermoelectric generator system, which can be connected to an external maximum power point tracking system.

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The effect of temperature mismatch on thermoelectric generators electrically connected in series and parallel

Cited by 184 publications

References 27 publications

Development of a System for Thermoelectric Heat Recovery from Stationary Industrial Processes

Development of a System for Thermoelectric Heat Recovery from Stationary Industrial Processes

Modelling and analysis of longitudinal thermoelectric energy harvesters considering series-parallel interconnection effect

Structure and Output Characteristics of a TEM Array Fitted to a Fin Heat Exchanger

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