scholarly journals Analysis of the use of thermoelectric generator and heat pipe for waste heat utilization

2018 ◽  
Vol 67 ◽  
pp. 02057
Author(s):  
Imansyah Ibnu Hakim ◽  
Nandy Putra ◽  
Mohammad Usman
Keyword(s):  
Output Voltage ◽  
Fossil Fuels ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Electrical Power ◽  
Heat Pipes ◽  
Hot Water ◽  
Peltier Effect ◽  
Cold Side ◽  
Working Principle

Waste heat recovery is one way to reduce the use of fossil fuels, one of them is by using thermoelectric generator to convert waste heat into Thermoelectric Generator (TEGs) is a module that can convert heat into electrical power directly, using Seebeck effect and Peltier effect as its working principle, so it can increase efficiency of energy consumption by utilizing waste heat from an instrument that generate waste heat. The focus of this research is to find the output voltage of TEG by utilizing the temperature difference on the cold side and the heat side of the TEGs. The heat side of the module will be given heat from the heater as a simulation of the heat from hot water, and on the cold side heat pipes will be used to remove the heat on the cold side of TEGs. The result, output voltage that generated by using 4 module TEGs that arranged to Thermal Series - Series Circuit and using 2 heat pipes is 2.1-volt, and then it is possible to use for phone charger.

Harvesting Waste Heat Energy from Automobile Engine Exhaust Using Teg with Heat Pipes

2018 ◽  
Vol 7 (4.35) ◽  
pp. 85
Author(s):  
Arun Seeralan Balakrishnan ◽  
Farrukh Nagi ◽  
Khairul Salleh ◽  
Prem A/L Gunnasegaran
Keyword(s):  
Finite Element ◽  
Waste Heat ◽  
Heat Removal ◽  
Heat Pipes ◽  
Heat Energy ◽  
Exhaust Pipe ◽  
Cold Side ◽  
Exhaust Heat ◽  
Pipe Line ◽  
Nano Fluids

This research investigates how the heat from car exhaust pipe line can be recovered as power using passive Thermo electric generator (TEG) using heat pipes. In this research the heat pipes are place on the cold side of TEG to remove the rising temperature and hot side of TEG is placed on the circumference of exhaust pipe line of car engine. The heat pipes with and without nano-fluids were placed on cold side of TEGs to investigate heat removal from increasing temperature and too maintain constant temperature on cold side. On the basis of results from 3D finite element simulations and experiments in the setup, the heat flow, voltage, and current were measured. The method presented in this paper gives detailed insight into how TEG modules perform in general, and also enables prediction of potential improvement in module performance by using different nano-fluids as coolants and Preliminary results were obtained. The results of Finite Element Analysis are analogous with the experimental results of TEG with water filled heat pipes with minimal possible errors. Therefore, the performance of nano-fluids in heat pipes are numerically evaluated and proposal are made for the enhancement of Module power outputs in Harnessing exhaust heat energy.

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

2021 ◽  
Vol 321 ◽  
pp. 02003
Author(s):  
Leisheng Chen ◽  
Zuyi Yu ◽  
Jingwen Zhang ◽  
Jaeyoung Lee
Keyword(s):  
Tilt Angle ◽  
Performance Optimization ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Structural Parameters ◽  
Electrical Power ◽  
Open Circuit ◽  
Relative Content ◽  
Electrical Performance ◽  
Tubular Thermoelectric Generator

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.

scholarly journals Performance Analysis of (Bi2Te3-PbTe) Hybrid Thermoelectric Generator

2016 ◽  
Vol 5 (1) ◽  
pp. 32
Author(s):  
Anitha Angeline A ◽  
Jayakumar J
Keyword(s):  
Power Output ◽  
Power Efficiency ◽  
Figure Of Merit ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Maximum Power ◽  
Superior Performance ◽  
Cold Side ◽  
Current Output ◽  
Maximum Power Output

The performance of (Bi<sub>2</sub>Te<sub>3</sub>-PbTe) hybrid thermoelectric generator (TEG)<strong> </strong>composed of n-type Bismuth Telluride and p-type Lead Telluride semiconductor materials is presented in this paper. <strong> </strong>The effect of different performance parameters such as output voltage, output current, output power, maximum power output, open circuit voltage, Seebeck co-efficient, electrical resistance, thermal conductance, figure of merit, efficiency, heat absorbed and heat removed based on maximum conversion and power efficiency have been theoretically analyzed by varying the hot side temperature of the hybrid thermoelectric generator up to 350<sup>o</sup>C and by varying the cold side temperature from 30<sup>o</sup>C to 150<sup>o</sup>C. The results showed that a maximum power output of 21.7 W has been obtained with the use of one hybrid thermoelectric module for a temperature difference of 320<sup>o</sup>C between the hot and cold side of the thermoelectric generator at matched load resistance. The figure of merit was found to be around 1.28 which makes its usage possible in the intermediate temperature (250<sup>o</sup>C to 350<sup>o</sup>C) applications such as heating of Biomass waste, heat from Biomass cook stoves or waste heat recovery etc. It is also observed that the hybrid thermoelectric generator offers superior performance over 250<sup>o</sup>C of the hot side temperature, compared to standard Bi<sub>2</sub>Te<sub>3 </sub>modules.

scholarly journals Regeneration of Electrical Energy from Waste Geothermal Fluid in Geothermal Power Plants

2019 ◽  
Vol 2 (3) ◽  
pp. 525-531
Author(s):  
Mahmut Hekim ◽  
Engin Cetin
Keyword(s):  
Power Plants ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Electrical Energy ◽  
Heat Energy ◽  
Hot Water ◽  
Geothermal Resources ◽  
Geothermal Fluid ◽  
Geothermal Power ◽  
Electrical Energy Production

Geothermal power plants are the plants that provide the conversion of thermal energy in geothermal fluid to electrical energy as a result of the extraction of underground hot water resources to the earth by drilling. The total installed power of geothermal power plants in the field of geothermal resources in Turkey has reached 1,336 MW. The geothermal fluid, which is used for electric power generation in geothermal power plants, is re-injected into the underground wells after electrical energy production. For efficient generation of electrical energy in geothermal power plants, it is aimed to reuse the waste heat energy within the geothermal fluid before it is sent to the re-injection well. To achieve this aim, thermoelectric generator modules which convert waste heat energy to electrical energy can be used. In this study, a thermoelectric generator-based geothermal power plant simulator that converts geothermal fluid waste heat into electrical energy is installed and commissioned in the laboratory conditions.

scholarly journals Thermoelectric Generator with Passive Biphasic Thermosyphon Heat Exchanger for Waste Heat Recovery: Design and Experimentation

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5815
Author(s):  
Miguel Araiz ◽  
Álvaro Casi ◽  
Leyre Catalán ◽  
Patricia Aranguren ◽  
David Astrain
Keyword(s):  
Heat Exchanger ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Experimental Studies ◽  
Industrial Process ◽  
Net Generation ◽  
Cold Side ◽  
Proper Design ◽  
Recovery Design ◽  
Current Energy

One of the measures to fight against the current energy situation and reduce the energy consumption at an industrial process is to recover waste heat and transform it into electric power. Thermoelectric generators can be used for that purpose but there is a lack of experimental studies that can bring this technology closer to reality. This work presents the design, optimizations and development of two devices that are experimented and compared under the same working conditions. The hot side heat exchanger of both generators has been designed using a computational fluid dynamics software and for the cold side of the generators two technologies have been analysed: a finned dissipater that uses a fan and free convection biphasic thermosyphon. The results obtained show a maximum net generation of 6.9W in the thermoelectric generator with the finned dissipater; and 10.6W of power output in the generator with the biphasic thermosyphon. These results remark the importance of a proper design of the heat exchangers, trying to get low thermal resistances at both sides of the thermoelectric modules, as well as, the necessity of considering the auxiliary consumption of the equipment employed.

scholarly journals Output voltage characteristic in system lighting road based on heat pipe and thermoelectric

2018 ◽  
Vol 67 ◽  
pp. 02058
Author(s):  
Wayan Nata Septiadi ◽  
Made Ricki Murti ◽  
Arliyandi ◽  
I.G.A. Pristha Arvikadewi ◽  
I Putu Yuda Pramana Putra
Keyword(s):  
Solar Radiation ◽  
Heat Pipe ◽  
Output Voltage ◽  
Waste Heat ◽  
Asphalt Pavement ◽  
Field Testing ◽  
Cold Side ◽  
Analysis Process ◽  
System Output ◽  
Novel Design

A novel design of a thermal management pavement system is introduced in this paper. The basic concept behind this design is a utilize of waste heat from asphalt pavement have as a base a heat pipe and thermoelectric for energy of street lighting. In this system, output voltage is influenced by difference in temperature between hot side and cold side of thermoelectric. The intensity of solar radiation at hourly is variant, so the resulting of output voltage fluctuated. The research method by field testing direct exposed solar radiation on the variation time at 09.00; 10.00; 11.00; 12.00; 13.00; 14.00; 15.00; 16.00 Indonesia Central Standard Time. The data of this research are surface temperature of asphalt pavement, difference in temperature between hot side and cold side of thermoelectric, and output voltage of system. The analysis process by quantitative experimental. In this research, the output voltage increased from 09.00 until 13.00, and after that time the output voltage decreased.

Waste Heat Recovery From Generators in the Deployed Army

2014 ◽  
Author(s):  
Gunnar Tamm ◽  
J. Ledlie Klosky ◽  
Jacob Baxter ◽  
Luke Grant ◽  
Isaac Melnick ◽  
...  
Keyword(s):  
Waste Heat ◽  
Mechanical Energy ◽  
Electrical Power ◽  
Electrical Energy ◽  
The United States ◽  
Hot Water ◽  
Efficient Production ◽  
Water Heater ◽  
Power Sources ◽  
Fuel Savings

Electrical power generation in austere settings, such as combat zones, places a heavy burden on the US Army; high costs in both dollars and lives lost require that every drop of fuel be used effectively and efficiently. In remote locations such as combat outposts (COPs) and small forward operating bases (FOBs) in Afghanistan, electrical power derived from the Army’s standard Advanced Medium Mobile Power Sources (AMMPS) generator is even used to heat water for showers and heat living spaces. This heating requires conversion of thermal energy to mechanical energy, which is then converted to electrical energy and back to heat. Thus, a significant fuel savings could be realized through the more efficient production of heat. A combined heat and power system is proposed; efficiency is increased by routing the generator exhaust through simple ducting to a standard gas hot water heater to produce hot water with waste heat. With funding from the U.S. Army Rapid Equipping Force, cadets and faculty at the United States Military Academy designed, built and tested a system for under $1,000 in parts which was readily coupled to a 5 kW AMMPS generator to produce hot shower water. Results indicate a possible fuel savings of 1500–2000 gallons per year, 20–35% increased fuel utility, and the ability to provide 10–20 five gallon showers during every 5 hours of operation of each 5 kW generator. At a fuel cost of $20–50 per gallon in the deployed environment, and considering the large inventory of deployed generators, the payback for the Army could be tremendous.

A Novel Thermoelectric Generator for the Detection of Electrical Equipment

2013 ◽  
Vol 743-744 ◽  
pp. 105-110
Author(s):  
Hong Tao Yu ◽  
Zhi Feng Zhang ◽  
Qing Quan Qiu ◽  
Qiang Sun ◽  
Guo Min Zhang ◽  
...  
Keyword(s):  
Power Generation ◽  
Temperature Difference ◽  
Thermoelectric Generator ◽  
Low Voltage ◽  
Waste Heat ◽  
Electrical Equipment ◽  
Cold Side ◽  
Simulation And Experiment ◽  
The One ◽  
High Level

Semiconductor thermoelectric generators have a series of advantages, such as compact volume, high-level reliability, and effective power generation in the presence of temperature difference. In many occasions, as a result of high voltage, electrical equipments can't be measured by the way of direct contact. In order to avoid equipment faults caused by low-voltage contact, a thermoelectric generator which uses waste heat of electrical equipments in service was designed. Electrical equipments often operate below 400K, and in this condition Bi2Te3 shows an outstanding performance of power generation. In order to solve the problems of little temperature difference and output power on steady-state, two methods were introduced. On the one hand, the temperature difference can be increased by filling with thermal insulation padding between the p-n junctions and using a heat sink in the cold side, and on the other hand, the output voltage and power will be augmented by increasing the number of p-n junctions. These methods have been proved effectively by simulation and experiment with promising outcomes.

The Study of Cook-Stove Thermoelectric Generator Power

2014 ◽  
Vol 979 ◽  
pp. 421-425 ◽  
Author(s):  
Narong Sangwaranatee
Keyword(s):  
Heat Exchanger ◽  
Electric Power ◽  
Electric Current ◽  
Electrical Resistance ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Thermoelectric Module ◽  
Cold Side ◽  
Heating Value ◽  
Power Rate

This research studies the alternative way of electricity generating from the waste heat of economy oven by using 4 modules of thermoelectric modules. The hot side of thermoelectric module is attached to the heat plate while the cold side is installed on the rectangular, plate-fin heat exchanger. Variety of system adjustments were used during this study in terms of finding the maximum electric power rate. Adjusting the heating value and the electrical resistance to the thermoelectric was the procedure in this study. From the research, we found out that at the temperature of 200°C on the heat pad, the released maximum electric current was 4.5 W. The percentage of heat converting to electric current was 11.9%, with the 0.84 A and 5.35 V. The efficiency of the economy oven was 23.20%, and comes up to 23.39% while generating power via thermoelectric module.

Modeling of a Thermoelectric Generator to Produce Electrical Power by Utilizing Waste Heat

2019 ◽  
Author(s):  
Koushik Ahmed ◽  
Md Shahnewaz Tanvir ◽  
Rafid Al Tahmid ◽  
Md. Mohaimanul Islam Sagor ◽  
Md. Ahsanul Haq ◽  
...  
Keyword(s):  
Thermoelectric Generator ◽  
Waste Heat ◽  
Electrical Power
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