Thermoelectric power generator: Field test at Bottle Rock geothermal power plant

“…Figure 1e illustrates a geothermal−TEG configuration containing a six-layer modu-larized design, tested in a geothermal field. 32 This six-layer TEG can generate about 500 W of electricity at a temperature difference of 152 °C. 32 As one of the advanced green and reliable energy technologies, hydrogen fuel production has been attracting great interest.…”

Section: Introductionmentioning

confidence: 99%

“…32 This six-layer TEG can generate about 500 W of electricity at a temperature difference of 152 °C. 32 As one of the advanced green and reliable energy technologies, hydrogen fuel production has been attracting great interest. 33−36 Hydrogen fuel is regarded as a promising energy carrier and may be the cleanest fuel since water alone is produced after its combustion.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, by lifting the heat pipe temperature to 630 °C, the effective thermal conductivity reaches 35 831 W m –1 K –1 , which is almost 100 times that of Cu. Figure e illustrates a geothermal–TEG configuration containing a six-layer modularized design, tested in a geothermal field . This six-layer TEG can generate about 500 W of electricity at a temperature difference of 152 °C …”

Section: Introductionmentioning

confidence: 99%

“…Figure e illustrates a geothermal–TEG configuration containing a six-layer modularized design, tested in a geothermal field . This six-layer TEG can generate about 500 W of electricity at a temperature difference of 152 °C …”

Section: Introductionmentioning

confidence: 99%

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Applications of Thermoelectric Generators To Improve Catalytic-Assisted Hydrogen Production Efficiency: Future Directions

et al. 2022

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Current waste-heat recovery technologies (e.g., heat exchangers) for low-temperature reactor systems are not as efficient as they need to be for high-temperature industrial plants. However, thermoelectric generators (TEGs), enabling the capture of electricity from low-grade waste heat, are regarded as a potential solution. The current research aims to discuss the effectiveness of TEGs in enhancing the efficiency of catalyst-assisted methane conversion by boosting input electrical energy. By applying TEGs to a conventional methane cracking system, the catalytic reactions proceed more effectively as they employ the low-temperature waste heat byproduct of the system. Such an approach has not yet been investigated. The applications of TEGs are discussed and justified according to two mechanisms for activating the performance of catalysts: catalyst heat treatment and electroforming (i.e., the protonic effect). Accordingly, TEG-generated direct-current electrical heating not only reduces the preheating time but also activates the surfaces of catalysts. Furthermore, surface polarization caused by the applied electric field provides the proton conduction to facilitate methane cracking. This new and simple process may potentially capture low-grade waste heat and generate electricity for activating catalyst beds, thereby improving the efficiency of hydrogen production techniques.

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Efficiency Measurement and Modeling of a High‐Performance Mg₂(Si,Sn)‐Based Thermoelectric Generator

et al. 2022

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Mg2(Si,Sn) is an attractive material class due to its excellent thermoelectric (TE) properties, its eco‐friendly constituents, its low mass density, and its low price. A lot of research has been done on optimizing its TE properties; however, works on its use in thermoelectric generators (TEG) are scarce. Herein, the first conversion efficiency measurement of a functional, fully Mg2(Si,Sn)‐based TEG, approaching a maximum value of 4% for an applied ΔT = 375 °C, is shown. A maximum power density of 0.9 W cm−2 (related to the cross‐sectional area of the TE legs) at ΔT=375 °C is also reported, which is among the highest performance of silicide‐based modules reported in literature. Efficiency measurements can be tricky due to the uncertainty of heat flow measurement and parasitic heat losses; therefore, assessing the measurement reliability by confronting it to theoretical calculations is necessary. TEG device simulation in a constant property model is used to compare measured data to expected values and a good match is found (<1% deviation for current at maximum power, <4% difference for maximum power output, deviation within measurement uncertainty range for heat flows and efficiency). The significant discrepancy between measurement and calculations of the inner electrical resistance reveals room for improvement. Cracks form due to thermally induced mechanical stress, which dramatically increase the inner electrical resistance. It is shown that by avoiding those cracks, the maximum power output and conversion efficiency of the TEG could be improved by 30%.

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Thermoelectric power generator: Field test at Bottle Rock geothermal power plant

Cited by 34 publications

References 41 publications

2021 U.S. Geothermal Power Production and District Heating Market Report

2021 U.S. Geothermal Power Production and District Heating Market Report

Applications of Thermoelectric Generators To Improve Catalytic-Assisted Hydrogen Production Efficiency: Future Directions

Efficiency Measurement and Modeling of a High‐Performance Mg₂(Si,Sn)‐Based Thermoelectric Generator

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Thermoelectric power generator: Field test at Bottle Rock geothermal power plant

Cited by 34 publications

References 41 publications

2021 U.S. Geothermal Power Production and District Heating Market Report

2021 U.S. Geothermal Power Production and District Heating Market Report

Applications of Thermoelectric Generators To Improve Catalytic-Assisted Hydrogen Production Efficiency: Future Directions

Efficiency Measurement and Modeling of a High‐Performance Mg2(Si,Sn)‐Based Thermoelectric Generator

Contact Info

Product

Resources

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Efficiency Measurement and Modeling of a High‐Performance Mg₂(Si,Sn)‐Based Thermoelectric Generator