The study of a thermoelectric generator with various thermal conditions of exhaust gas from a diesel engine

Abstract:Thermoelectric (TE) technology is regarded as alternative and environmentally friendly technology for harvesting and recovering heat which is directly converted into electrical energy using thermoelectric generators (TEG). Conversely, Peltier coolers and heaters are utilized to convert electrical energy into heat energy for cooling and heating purposes The main challenge lying behind the TE technology is the low efficiency of these devices mainly due to low figure of merit (ZT) of the materials used in making them as well as improper setting of the TE systems. The objective of this work is to carry out a comprehensive review of TE technology encompassing the materials, applications, modelling techniques and performance improvement. The paper has covered a wide range of topics related to TE technology subject area including the output power conditioning techniques. The review reveals some important critical aspects regarding TE device application and performance improvement. It is observed that the intensified research into TE technology has led to an outstanding increase in ZT, rendering the use TE devices in diversified application a reality. Not only does the TE material research and TE device geometrical adjustment contributed to TE device performance improvement, but also the use of advanced TE mathematical models which have facilitated appropriate segmentation TE modules using different materials and design of integrated TE devices. TE devices are observed to have booming applications in cooling, heating, electric power generation as well as hybrid applications. With the generation of electric energy using TEG, not only does the waste heat provide heat source but also other energy sources like solar, geothermal, biomass, infra-red radiation have gained increased utilization in TE based systems.However, the main challenge remains in striking the balance between the conflicting parameters; ZT and power factor, when designing and optimizing advanced TE materials.Hence more research is necessary to overcome this and other challenge so that the performance TE device can be improved further.

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“…The optimizations of the configuration and layout of TEGs heated by exhaust gas are carried out [30]. Fig.…”

Section: Progress Of Teg System Improvementmentioning

confidence: 99%

A comprehensive review of thermoelectric technology: Materials, applications, modelling and performance improvement

Twaha

Zhu

Yan

et al. 2016

Renewable and Sustainable Energy Reviews

487

208

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“…Diesel exhaust is a mixture of coarsely dispersed aerosol with a particle size of 0.5-1.0 microns 14,[17][18][19] . The disperse phase of the same mixed aerosol has complex composition and consists of liquid and resinous and solid unburned products.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Study of Catalysts on Metal blocks for Neutralization of Exhaust Gases of the Stationary Diesel Generator

Sassykova¹,

Nalibayeva²,

Aubakirov³

et al. 2017

Orient. J. Chem

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The work aim was preparation of catalysts with various active phase on metal block carriers and test their effectiveness on exhaust gases of the stationary diesel generator at various loadings. The active phase was prepared on the basis of the platinum group metals, oxides of nickel, manganese. The catalyst on the basis of 0.1% of Pt kept the activity during 100 h. test on the diesel generator. The most effective catalyst at all engine operating conditions was the sample containing 5% of nickel oxide and manganese and activated of 0.1% Pt. The catalytic samples on the basis of Ni and Mn promoted by Pd (0.1%, 0.25%) and Pt (0.1%), provide high degree of conversion of CO to CO 2 , C x H y to CO 2 and H 2 O, NO to N 2 .

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“…A TEG is a solid component that provides direct energy due to the variation of the surrounding thermal behavior, and electrical power can then be generated based on the “Seebeck effect” and temperature gradient [ 6 , 7 , 8 ]. Thermoelectric technology had become popular in heat recovery applications and it was implemented with various sources such as internal combustion engines [ 9 , 10 , 11 , 12 ], stoves [ 13 , 14 , 15 ], vehicles [ 16 , 17 , 18 , 19 ], biomass gasifiers [ 20 ], chimneys [ 21 , 22 ], diesel engines [ 23 , 24 , 25 , 26 ], and fuel cells [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

New Concept of Power Generation Using TEGs: Thermal Modeling, Parametric Analysis, and Case Study

Faraj

Jaber

Chahine

et al. 2020

Entropy

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In this manuscript, an innovative concept of producing power from a thermoelectric generator (TEG) is evaluated. This concept takes advantage of using the exhaust airflow of all-air heating, ventilating, and air-conditioning (HVAC) systems, and sun irradiation. For the first step, a parametric analysis of power generation from TEGs for different practical configurations is performed. Based on the results of the parametric analysis, recommendations associated with practical applications are presented. Therefore, a one-dimensional steady-state solution for the heat diffusion equation is considered with various boundary conditions (representing applied configurations). It is revealed that the most promising configuration corresponds to the TEG module exposed to a hot fluid at one face and a cold fluid at the other face. Then, based on the parametric analysis, the innovative concept is recognized and analyzed using appropriate thermal modeling. It is shown that for solar radiation of 2000 W/m2 and a space cooling load of 20 kW, a 40 × 40 cm2 flat plate is capable of generating 3.8 W of electrical power. Finally, an economic study shows that this system saves about $6 monthly with a 3-year payback period at 2000 W/m2 solar radiation. Environmentally, the system is also capable of reducing about 1 ton of CO2 emissions yearly.

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The study of a thermoelectric generator with various thermal conditions of exhaust gas from a diesel engine

Cited by 45 publications

References 7 publications

A comprehensive review of thermoelectric technology: Materials, applications, modelling and performance improvement

A comprehensive review of thermoelectric technology: Materials, applications, modelling and performance improvement

Preparation and Study of Catalysts on Metal blocks for Neutralization of Exhaust Gases of the Stationary Diesel Generator

New Concept of Power Generation Using TEGs: Thermal Modeling, Parametric Analysis, and Case Study

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