Numerical and Experimental Study on Performance of a Low-Backpressure Polyhedral Thermoelectric Generator for Waste Heat Recovery

Quan, Rui; Li, Yangxin; Li, Tao; Chang, Yufang; Yan, Hao

doi:10.1007/s11630-022-1698-2

Cited by 12 publications

(5 citation statements)

References 33 publications

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“…The flowchart (refer Fig. 7 ) gives the equations to calculate various variable for the three different cases possible while using a TEG 23 , 24 . where —Temperature on hot side, —Temperature on cold side, —the average seeback coefficient in volts/kelvin, —the difference in temperature across the couple in K, —Voltage generated, —the input heat in Watts, —the thermal conductance of the couple in Watts / K, —the generator output current in Ampere, —the average internal resistance of the thermoelectric couple in Ohms, —the load resistance in Ohms.…”

Section: Methodsmentioning

confidence: 99%

Thermoelectric generator powered timepiece circuit for rechargeable battery operation

Penumala,

Karmel,

Kanimozhi

et al. 2024

Sci Rep

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The advent of digital technology has revolutionized the way we keep track of time. Digital watches have become an essential part of our daily lives and provide us with accurate and reliable time measurement. However, battery reliability is a long-standing issue in the digital watch industry. Batteries require frequent replacement and are a major source of waste. To solve this problem, a digital watch that runs on a lithium-polymer battery that is recharged by a voltage generated by a thermoelectric generator (TEG) placed on the hand. The proposed model uses TEG1-19913 that generates power in the range of 11.5 W to 14.5 W with hot end basking at 250 °C and a cold end between 30 °C and 50 °C. The TEG voltage is used to charge the lithium polymer battery, eliminating the need for conventional charging methods. The watch is designed to be compact and lightweight, so it can be worn comfortably for extended periods of time. The TEG is integrated into the watch strap and ensures that it is constantly in contact with the skin. The lithium-polymer battery used in the watch is a high-performance rechargeable battery that has high energy density and long life. In summary, the proposed digital watch is an innovative ecological solution to the problems associated with traditional battery-powered watches. The compact and light design of the watch combined with the energy-efficient display makes it a convenient and efficient timekeeping device.

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Section: Methodsmentioning

confidence: 99%

Thermoelectric generator powered timepiece circuit for rechargeable battery operation

Penumala,

Karmel,

Kanimozhi

et al. 2024

Sci Rep

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show abstract

“…2 shows the specific internal structure and fins parameters, length, width, angle, and spacing of fins are labeled L f , W f , A f , and S f , respectively. Considering the little influence of fin thickness on the heat exchanger, 39 it is fixed at 2 mm, which is equal to that of the heat exchanger.…”

Section: Teg Systemmentioning

confidence: 99%

“…16,17 Usually, the heat exchangers used in TEGs can be divided into plat-plate, 18 cylindrical, 19 and polyhedral ones. 20 Even though the rst one has more TEMs layout than the last two under the same external surface area conditions, it will lead to terrible surface temperature distribution and higher backpressure, which inevitably reduces the conversion efficiency of TEG. 21 For the second one, it has the best surface temperature distribution uniformity and satisfactory backpressure, but its TEM arrangement is inconvenient and the manufacturing cost is high.…”

Section: Introductionmentioning

confidence: 99%

Performance optimization of a thermoelectric generator for automotive application using an improved whale optimization algorithm

Quan,

Guo,

Liu

et al. 2023

Sustainable Energy Fuels

Self Cite

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“…Heat exchange with a symmetrical dimple arrangement in the upper and lower surfaces of the heat exchanger was developed by Yiping Wang et al [25] to improve the rate of heat transfer with low drop in pressure. Te inserted fns deteriorate the emission performance, fuel economy, and performance of the internal combustion engine [26]. Tis is useful for the enhancement of the hot side temperature of thermoelectric modules and the increment of output power of the automobile exhaust thermoelectric generator [27,28].…”

Section: Introductionmentioning

confidence: 99%

Effect of an Exhaust Heat Exchanger with Inserts on the Performance of Thermoelectric Generators

Patil,

Majumder

2024

Journal of Engineering

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A thermoelectric generator is used as a waste heat recovery system for generating electric power. The thermoelectric generator system consists of an exhaust heat exchanger, a thermoelectric module, and a water heat exchanger. The aim of the current work is to explore different types of inserts used in the test section of the exhaust heat exchanger and power generation of thermoelectric generators at different operating conditions. An experimental setup has been developed for conducting experimental investigation on thermoelectric generators to find the effect of the exhaust heat exchanger (EHE) with inserts on the performance of thermoelectric generators. The cone (G-type test section) and cone-cylinder (H-type test section) type inserts were introduced to enhance the performance of the thermoelectric generator. Compared with an insert-free (empty, F-type) thermoelectric generator with cone and cone-cylinder type inserts in terms of the output power, the average heat transfer rate and convection heat transfer coefficient of F-type, G-type, and H-type test sections of the EHE are 358, 468, and 459 W and 76, 100, and 97 W/m2K, respectively. It shows that the G-type test section of EHE exchanges more heat from engine exhaust to the hot surface of the thermoelectric module through the wall of the EHE. The G-type test section created more temperature difference; obviously, it generated more power output. It was observed that the G-type and H-type test sections of exhaust heat exchangers improved average maximum output power by 29.49% and 26.11% than that by the F-type test section of heat exchanger, respectively. The F-type, G-type, and H-type test sections of exhaust heat exchangers showed a maximum average efficiency of 0.80, 0.78, and 0.70%, respectively.

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Numerical and Experimental Study on Performance of a Low-Backpressure Polyhedral Thermoelectric Generator for Waste Heat Recovery

Cited by 12 publications

References 33 publications

Thermoelectric generator powered timepiece circuit for rechargeable battery operation

Thermoelectric generator powered timepiece circuit for rechargeable battery operation

Performance optimization of a thermoelectric generator for automotive application using an improved whale optimization algorithm

Effect of an Exhaust Heat Exchanger with Inserts on the Performance of Thermoelectric Generators

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