scholarly journals Prototypical thermoelectric generator for waste heat conversion from combustion engines

2013 ◽  
Vol 154 (3) ◽  
pp. 60-71
Author(s):  
Krzysztof WOJCIECHOWSKI ◽  
Jerzy MERKISZ ◽  
Paweł FUĆ ◽  
Joanna TOMANKIEWICZ ◽  
Rafał ZYBAŁA ◽  
...  
Keyword(s):  
Flow Resistance ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Theoretical Calculations ◽  
Exhaust System ◽  
Combustion Engines ◽  
Performance Tests ◽  
System Efficiency ◽  
Maximal Power ◽  
Powertrain System

The work presents experimental results of performance tests and theoretical calculations for the thermoelectric generator TEG fitted in the exhaust system of a 1.3 dm3 JTD engine. Benchmark studies were carried out to analyze the performance of the thermoelectric modules and total TEG efficiency. Additionally the investigation of combustion engine’s power drop casued by exhaust gasesflow resistance is presented. The detailed studies were performed using a new prototype of the thermoelectric generator TEG equipped with 24 BiTe/SbTe modules with the total nominal power of 168 W. The prototypical device generates maximal power of200 Wfor the exhaus gases massflow rate of 170 kg-h-1 and temperature of280 oC. Power drop caused by the flow resistance of gases ranges between 15 and 35 mbarfor mass flow rate 100-180 kg-h-1. We predict that the application of the new thermoelectric materials recently developed at AGH would increase the TEG power by up to 1 kW, would allow the increase of the powertrain system efficiency by about 5 %, and a corresponding reduction of C02 emission.

An experimental investigation of exhaust waste heat recycling by thermoelectric generators under different thermal conditions for internal combustion engines

2017 ◽  
Vol 232 (12) ◽  
pp. 1648-1653 ◽  
Author(s):  
M Akif Kunt
Keyword(s):  
Internal Combustion Engines ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Thermal Conditions ◽  
Internal Combustion ◽  
Load Resistance ◽  
Heating Process ◽  
Combustion Engines ◽  
Exhaust Waste Heat ◽  
Exhaust Systems

Almost 70% of heat power produced by pistons in internal combustion engines is lost due to exhaust and cooling. In the course of the heating process, 25% of useful energy transfers to the exit shaft. There have been a lot of studies on recycling waste heat of internal combustion engines, especially on cooling and exhaust systems. A thermoelectric generator is an important way to recycle waste energy in exhaust systems of internal combustion engines. In this study, an air-cooled thermoelectric generator was designed to recycle waste heat energy in exhaust systems of internal combustion engines and its performance was tested. Waste heat recycling tests were conducted by measuring voltage, current, and power values under different thermal conditions depending on the change in load resistance. The results obtained were compared with the results of analyses and experiments. Maximum voltage value at RI = 45Ω load resistance was obtained as 11.03 V (experiment) and 11.22 V (analysis), and maximum current value at RI = 5Ω load resistance as 0.42 A (experiment) at Th = 250°C, Δ T = 40°C.

Research on Integration Design of Automobile Waste Heat Thermoelectric Generation Exchanger and Engine Muffler

2014 ◽  
Vol 494-495 ◽  
pp. 51-54
Author(s):  
Jiao Long Xie
Keyword(s):  
Large Scale ◽  
Thermoelectric Generator ◽  
High Efficiency ◽  
Waste Heat ◽  
Thermoelectric Module ◽  
Structural Complexity ◽  
Exhaust System ◽  
Thermoelectric Generation ◽  
Technical Issue ◽  
Structural Integration

The thermoelectric generator (TEG) recovering waste heat from the exhaust has became a potential technical issue, due to its characters of pollution-free, no moving parts, reliability and high efficiency. There exist arrangement on the chassis and the exhaust backpressure of whole system will increase of these two problems, when integrating TEG in the car of TEG and the muffler is to integrate the thermoelectric module on the surface muffler, it can effectively reduce the size of TEG, also reduce its weight and structural complexity. It also reduced the backpressure of TEG, meanwhile solved the compatibility issues with other components of exhaust system. The structural integration laid the foundation to achieve the large-scale use of thermoelectric materials in the car.

A Study on Generating Electricity by Using Exhaust Waste Heat in a Diesel Engine

2013 ◽  
Vol 446-447 ◽  
pp. 858-862
Author(s):  
Hasan Aydogan ◽  
A. Engin Ozcelik ◽  
Mustafa Acaroglu ◽  
Hakan Işik
Keyword(s):  
Diesel Engine ◽  
Internal Combustion Engines ◽  
Waste Heat ◽  
Mechanical Energy ◽  
Exhaust System ◽  
Internal Combustion ◽  
Heat Energy ◽  
Combustion Engines ◽  
Exhaust Temperature ◽  
Exhaust Waste Heat

Internal combustion engines are widely used in our day. Internal combustion engines first transform fuel energy into heat energy. Afterwards, approximately 30% of this heat energy is transformed into mechanical energy. Approximately 5% of the heat energy is expelled through friction and radiation, 30% through cooling and 35% through the exhaust system. In the present study, electricity was generated by using thermoelectric equipment and the waste heat expelled from the exhaust system. It was observed that as the exhaust temperature increased, the amount of electricity generated also increased.

scholarly journals Automobile Waste Heat Recovery System Using Thermoelectric Generator

2020 ◽  
Vol 5 (3) ◽  
pp. 58-61
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Exhaust System ◽  
Electrical Energy ◽  
Heat Energy ◽  
Waste Heat Recovery System ◽  
Recovery System ◽  
Heat Recovery System

Energy crisis is major problem in this era. Thermoelectric generator is a promising solution for this problem. This research aims to recover waste heat energy from automobile by converting it into electrical energy using thermoelectric generator. Thermoelectric generator is applied at automobile exhaust system to produce electrical energy from heat energy directly with a phenomenon called see-beck effect. This work develops a heat exchanger model with thermoelectric generator for automobile waste heat recovery in which heat source and cold sink are actually modeled. Main emphasis is put on effective temperature difference across the TEGs to get better performance of the exhaust waste heat recovery system. This research shows that the model is able to produce up to 2.67 W energy using 3 Numbers of TEGs in this design.

scholarly journals Analysis of car waste heat recovery system utilizing thermoelectric generator

2018 ◽  
Vol 19 (6) ◽  
pp. 619-626
Author(s):  
Artur Nemś ◽  
Mikołaj Simiński ◽  
Magdalena Nemś ◽  
Tomasz Magiera
Keyword(s):  
Thermoelectric Generator ◽  
Waste Heat ◽  
Combustion Engine ◽  
Electric Energy ◽  
Thermoelectric Module ◽  
Exhaust System ◽  
Calculation Algorithm ◽  
Exhaust Gases ◽  
Waste Heat Recovery System ◽  
Generator Design

This paper presents a calculation algorithm for a thermoelectric generator fitted in the exhaust system of a combustion engine. The viability of the presented calculation method was verified on an actual combustion engine. The calculations were performed for a BMW engine, and the generator design was based on a prototype from the same manufacturer. The paper includes calculations of the thermal cycle and of the parameters of exhaust gases from the engine. Subsequent calculations cover heat transfer from exhaust gases to the thermoelectric module and the amount of electric energy obtained from a series of modules. In the last part, the focus is on the influence of engine speed on the performance of the thermoelectric generator.

scholarly journals Topology optimized thermoelectric generator: a parametric study

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
John Mativo ◽  
Kevin Hallinan ◽  
Uduak George ◽  
Greg Reich ◽  
Robin Steininger
Keyword(s):  
Topology Optimization ◽  
Thermoelectric Generator ◽  
Volume Fraction ◽  
Power Conversion ◽  
Power Production ◽  
Power Reduction ◽  
Void Volume Fraction ◽  
Thermoelectric Generators ◽  
Maximal Power ◽  
Design Yield

Abstract Typical thermoelectric generator legs are brittle which limits their application in vibratory and shear environments. Research is conducted to develop compliant thermoelectric generators (TEGs) capable of converting thermal loads to power, while also supporting shear and vibratory loads. Mathematical structural, thermal, and power conversion models are developed. Topology optimization is employed to tailor the TEG design yield maximal power production while sustaining the applied shear and vibratory loads. As a specific example, results are presented for optimized TEG legs with a void volume fraction of 0.2 that achieve compliance shear displacement of 0.0636 (from a range of 0.0504 to 0.6079). In order to achieve the necessary compliance to support the load, the power reduction is reduced by 20% relative to similarly sized void free TEG legs.

scholarly journals Development of a Pattern Recognition Methodology with Thermography and Implementation in an Experimental Study of a Boiler for a WHRS-ORC

2019 ◽  
Author(s):  
Concepción Paz ◽  
Eduardo Suarez ◽  
Miguel Concheiro ◽  
Antonio Diaz
Keyword(s):  
Pattern Recognition ◽  
Wall Temperature ◽  
Waste Heat ◽  
Combustion Engine ◽  
Organic Rankine Cycle ◽  
Exhaust System ◽  
Rankine Cycle ◽  
Operating Conditions ◽  
Cycle Performance ◽  
Working Fluid

Waste heat dissipated in the exhaust system in a combustion engine represents a major source of energy to be recovered and converted into useful work. A waste heat recovery system (WHRS) based on an Organic Rankine Cycle (ORC) is a promising approach, and has gained interest in the last few years in an automotive industry interested in reducing fuel consumption and exhaust emissions. Understanding the thermodynamic response of the boiler employed in an ORC plays an important role in steam cycle performance prediction and control system design. The aim of this study is therefore to present a methodology to study these devices by means of pattern recognition with infrared thermography. In addition, the experimental test bench and its operating conditions are described. The methodology proposed identifies the wall coordinates, traces paths, and tracks wall temperature along them in a way that can be exported for subsequent post-processing and analysis. As for the results, through the wall temperature paths on both sides (exhaust gas and working fluid) it was possible to quantitatively estimate the temperature evolution along the boiler and, in particular, the beginning and end of evaporation.

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