Configuration optimization of the segmented modules in an exhaust-based thermoelectric generator for engine waste heat recovery

Shu, Gequn; Ma, Xiaonan; Tian, Hua; Yang, Haoqi; Chen, Tianyu; Li, Xiaoya

doi:10.1016/j.energy.2018.06.175

Cited by 85 publications

(26 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Numerous studies have investigated energy conversion efficiency and thermal reliability of segmented flat [18][19][20] and segmented annular. [21][22][23][24][25] Optimization of STEG systems has also been considered.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of energy conversion efficiency and thermal reliability of novel, unileg segmented thermoelectric generation systems

Aljaghtham

Çelik

2021

Int J Energy Res

View full text Add to dashboard Cite

Despite their great potential to recover waste heat, thermoelectric generators (TEGs) find limited usage since thermoelectric materials are only efficient within a limited temperature range. Using multiple materials in segmented TEGs can significantly enhance the overall energy conversion efficiency. However, thermal reliability is questionable in these systems especially at elevated temperatures and in annular configurations. This study explores the feasibility of utilizing unileg (single material) segmented TEG configuration as a remedy for the thermal stress problem. This study introduces the concept of unileg, segmented thermoelectric configurations (flat and annular) for the first time, and three-dimensional finite element simulations are conducted to investigate the thermoelectric performance and thermal reliability analysis in comparison with the conventional unicouple (dual material) systems. Results indicate that thermal stresses are significantly lowered in unileg systems compared to the unicouple configuration. In addition to the enhanced thermal reliability, power generation and thermoelectric conversion efficiency are higher in unileg systems since the material with higher performance is used solely eliminating the need of poorly performing, second thermoelectric leg material.

show abstract

Section: Introductionmentioning

confidence: 99%

Numerical analysis of energy conversion efficiency and thermal reliability of novel, unileg segmented thermoelectric generation systems

Aljaghtham

Çelik

2021

Int J Energy Res

View full text Add to dashboard Cite

show abstract

“…Similarly, Potente calculated the principles of design concepts and benefits of mufflers using numerical analysis [10]. In another study Berger., et.al used Fluent environment to investigate the reaction of a silencer in reducing transmission loss [11]. Shu et.…”

Section: Introductionmentioning

confidence: 99%

Effects of Chamber Perforations, Inlet and Outlet Pipe Diameter Variations on Transmission Loss Characteristics of a Muffler Using Comsol Multiphysics

Amuaku¹,

Asante²,

Edward³

et al. 2019

AAS

View full text Add to dashboard Cite

Confronted with noise disturbance during transmission of vehicle exhaust air, several mufflers have been designed to control the noise and improve the transmission characteristics. In order to optimize the noise control and attenuation quality, the internal geometry, inlet and outlet pipe diameters of a designed muffler were varied and the performance evaluated using finite element method (FEM). Furthermore, 2mm diameter equal circular perforations were introduced in the resonator chamber to verify the effect on the transmission loss characteristics. The results show that the performance of the muffler with inlet pipe diameter variation is significantly better (68dB) than the standard muffler (55dB) in controlling and reducing acoustic wave propagation within the same frequency range of (200~580Hz). The performance improved further to 70 dB by the introduction of circular perforations in resonator chamber. However, with the variation in the outlet diameter increase the performance of the muffler was 55dB but within a higher frequency range of 220~680Hz which is not reliable for acoustic wave propagation control. The average transmission loss performance of the designed mufflers were 48.62, 47.77, 39.01 and 37.77dB for the resonator chamber perforation, inlet pipe diameter increase, outlet pipe diameter increase and standard muffler respectively. Therefore, the designed muffler with resonator chamber perforations is the best for optimal acoustic wave control.

show abstract

“…2 The TE module will generate a voltage difference when temperature difference exists across the module, thereby producing electricity in external circuit. 3 Note that commercial thermoelectric modules are widely applied to energy harvesting applications such as photovoltaic power generation system, [4][5][6] vehicle exhaust, [7][8][9][10][11] human body heat recovery, 12 residential heating system, [13][14][15] biomass stove and furnace, 16,17 wireless sensors, 18,19 and processing chips. 20,21 For large-scale applications, Zhang et al 5 evaluated the efficiency of hybrid systems with different photovoltaic (PV) cells including crystalline silicon PV, silicon thin-film PV, polymer PV, and copper indium gallium selenide PV.…”

Section: Introductionmentioning

confidence: 99%

“…The TE module will generate a voltage difference when temperature difference exists across the module, thereby producing electricity in external circuit . Note that commercial thermoelectric modules are widely applied to energy harvesting applications such as photovoltaic power generation system, vehicle exhaust, human body heat recovery, residential heating system, biomass stove and furnace, wireless sensors, and processing chips …”

Section: Introductionmentioning

confidence: 99%

Experimental study on the energy harvesting of a cooktop via thermoelectric module assisted with phase change material

Chu

Chen

Chan³

et al. 2019

Energy Storage

View full text Add to dashboard Cite

This article presents an effective method for harvesting waste heat from a household cooktop. The energy‐harvesting module contains a thermoelectric (TE) module, heat pipe module, and phase change material (PCM). The effects of TE modules, cooling mediums (air, water, and paraffin), and heat sink configuration and arrangement on the overall performance of the energy harvesting module are examined experimentally. It is found that the cooling process on the cold side of TE plays an essential role on the output voltage and system performance. By adding an air‐cooled heat sink, both output voltage and temperature difference can be moderately improved. Yet using a water‐cooled heat sink can improve the output voltage by about four times higher. Furthermore, the output voltage can be further promoted by using more efficient thermoelectric module. It appears that fewer fins incorporated with the PCM container filled with paraffin shows the optimal energy harvesting performance. Additionally, the recharging time for the full, medium, and low flame operation is tested with 3, 4, and 15 minutes, respectively, and the maximum recharging power of 7.25 W can be achieved with the highest energy storage of 523 mAh after operating 30 minutes.

show abstract

Configuration optimization of the segmented modules in an exhaust-based thermoelectric generator for engine waste heat recovery

Cited by 85 publications

References 29 publications

Numerical analysis of energy conversion efficiency and thermal reliability of novel, unileg segmented thermoelectric generation systems

Numerical analysis of energy conversion efficiency and thermal reliability of novel, unileg segmented thermoelectric generation systems

Effects of Chamber Perforations, Inlet and Outlet Pipe Diameter Variations on Transmission Loss Characteristics of a Muffler Using Comsol Multiphysics

Experimental study on the energy harvesting of a cooktop via thermoelectric module assisted with phase change material

Contact Info

Product

Resources

About