Efficiency enhancement of an industrial-scale thermoelectric generator system by periodically inputting thermal power

Chen, Leisheng; Lee, Jae-Young

doi:10.1016/j.enconman.2016.04.032

Cited by 25 publications

(3 citation statements)

References 29 publications

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“…At a hot end temperature of 350 • C, electricity generation can reach up to 1.47 kW per square meter with a thermoelectric conversion efficiency of 4.5%. The industrial waste heat is usually from high-temperature gas [20][21][22] or the surfaces of high-temperature equipment [23]. The plate-type [15][16][17][18] and tubular-type [19] are the most used TEG constructions for the foresaid heat sources.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric Generator Design and Characterization for Industrial Pipe Waste Heat Recovery

Xiao

Sun

Wu³

et al. 2023

Processes

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Thermoelectric technology is an effective strategy to convert low–grade waste heat to electrical energy directly. Thermoelectric generators (TEGs) have been extensively studied in various waste heat scenarios, such as vehicle exhaust, metal casting processes and more. However, industrial pipelines also possess high levels of heat and wide distribution, yet there is limited research on TEGs for use in these pipes. The challenge in designing a TEG lies in the heat collector, which is complicated by the distinct structural differences between pipe and plate–shaped TEMs. Ultimately, we propose an arch bridge–shaped heat collector for the pipe to recover wasted thermal energy. The effects of some key factors, such as topology of TEMs, heat source temperature, cooling water temperature and velocity, on the generating performance are studied. The TEG achieved a temperature difference of 65.98 °C across the two ends of the TEM, resulting in an output power of 17.89 W at an open–circuit voltage of 133.35 V. This provides evidence that the designed heat collector is a feasible solution for recovering waste heat from pipes using TEG technology. This work provides reliable experimental data and efficient design for the application of TEGs in industrial pipes.

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Section: Introductionmentioning

confidence: 99%

Thermoelectric Generator Design and Characterization for Industrial Pipe Waste Heat Recovery

Xiao

Sun

Wu³

et al. 2023

Processes

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“…Thermoelectric generators (TEG) are devices that convert thermal energy into electricity based on the Seebeck effect. That TEGs do not have moving parts helps to expand the application area, and waste heat recovery utilizing TEGs has attracted much attention from researchers in recent years [1][2], but their thermal-to-electricity conversion efficiency is still relatively low and therefore needs to be improved. Compared to a flat-type TEG, a tubular thermoelectric generator (TTEG) has a structural advantage that enables it to be stuck to a pipe-like heat source or heat sink more closely, then the interfacial thermal resistance is reduced and thermal energy is transferred more efficiently.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Electrical Performance Optimization of a Tubular Thermoelectric Generator for Waste Heat Recovery

Chen

Zhang

et al. 2021

E3S Web Conf.

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In the waste heat utilization of automobile exhaust, the tubular thermoelectric generator (TTEG) has structural advantages compared with the flat-plate thermoelectric generator. A kind of TTEG that is composed of Bi0.5Sb1.5Te3 and Ni conical rings alternately attracts researchers' attention, and it generates electrical power based on the transverse thermoelectric effect. However, the electrical performance of such TTEG still needs to be improved for industrial utilization. In this study, the performance of TTEG was optimized through numerical simulation by changing its related structural parameters, including the tilt angle, the thickness of the conical ring, and the relative content of Ni. It is confirmed that the optimal tilt angle with maximum open-circuit voltage (OCV) is 27.3°; on this basis, it is found that a thinner thickness corresponds to a larger OCV; furthermore, when using a conical rings’ thickness of 0.75 mm and increasing the relative content of Ni in the Bi0.5Sb1.5Te3/Ni layered pair from 10% to 90%, the OCV decreases from 198mV to 105mV while the power density increases from 413W/m2 to 1350W/m2. It is believed that these findings can help to develop TTEGs with better electrical performance.

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“…24 Outside of cooling applications, it has been shown that heat pulses can improve the thermal to electric conversion efficiency of thermoelectric generators. [56][57][58][59][60][61] Equation 1, sometimes called the "Ideal equation", 62 determines the amount of cooling that can be achieved during steady state operation. The equation holds for transient conditions with the exception that T c , T and I are time dependent.…”

mentioning

confidence: 99%

Peltier Supercooling with Isosceles Current Pulses: Cooling an Object with Internal Heat Generation

Piggott

Allen

2017

ECS J. Solid State Sci. Technol.

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Applying a current pulse enables a short-term transitory state where the cold junction of a Peltier couple reaches temperatures below that obtainable via maximum temperature delta steady-state current. Short-term cooling applications like on-chip hot spot and pulsed laser sensor cooling have been studied using pulsed cooling. Some studies have proposed applications that utilize consecutive repeating pulses for longer term cooling applications. These studies have found or theorized increased cooling and coefficient of performance (C O P). Considering these studies, it is desirable to have a more detailed analysis of how the additional cooling and C O P are achieved. The objective herein is to provide a detailed analysis of cooling rate and C O P during pulses using a realistically modeled system simulated in SPICE. It was found that cooling rate for long term consecutive pulse cooling applications can be increased over steady-state but C O P in most cases is reduced during current pulses. The reasons why this happens are studied in depth.

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Efficiency enhancement of an industrial-scale thermoelectric generator system by periodically inputting thermal power

Cited by 25 publications

References 29 publications

Thermoelectric Generator Design and Characterization for Industrial Pipe Waste Heat Recovery

Thermoelectric Generator Design and Characterization for Industrial Pipe Waste Heat Recovery

Numerical Investigation on the Electrical Performance Optimization of a Tubular Thermoelectric Generator for Waste Heat Recovery

Peltier Supercooling with Isosceles Current Pulses: Cooling an Object with Internal Heat Generation

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