scholarly journals Design and implementation of a thermoelectric cogeneration unit

2017 ◽  
Author(s):  
◽  
Shaveen Maharaj
Keyword(s):  
Waste Heat ◽  
Cellular Phone ◽  
Electrical Energy ◽  
Heat Sources ◽  
Cold Side ◽  
Thermo Electric ◽  
Industrial Plants ◽  
Main Challenge ◽  
Led Lights ◽  
Cooling Methods

Industrial plants are excellent sources of waste heat and provide many opportunities for energy harvesting using thermo-electric principles. A thermoelectric generator (TEG) is utilized in this study for harvesting expended heat from various sources. The main challenge associated with this type of technology lies in the creation of a sufficient thermal gradient between the hot side and the cold side of the TEG device. This is necessary for the module to generate an appreciable quantity of electrical energy. The performance of the TEG generator is tested using different configurations, different heat sources and different cooling methods. Heat sources included electrically driven devices, gas, biomass and gel fuel. Expended heat from different sites within an industrial environment was also chosen for operating the TEG device. The power produced by the generator is sufficient to operate low power LED lights, a DC radio receiver and a cellular phone charger.

Waste Heat Management System for Hybrid Vehicles Using Thermoelectric Generator

2020 ◽  
Vol 12 (8) ◽  
pp. 1063-1066
Author(s):  
R. Asteekar ◽  
S. Senthamil Selvan ◽  
R. Janani
Keyword(s):  
Waste Heat ◽  
Electrical Energy ◽  
Hybrid Vehicles ◽  
Heat Management ◽  
Storage Unit ◽  
Thermo Electric ◽  
Electric Generator ◽  
Sustainable Resources ◽  
Load Demand ◽  
Future Potential

The present scenario is like that the need of the electrical energy is growing rapidly whereas the resource availability is lagging behind the load demand due to its extinction which leads to hinder our overall generation. It has been observed that the sustainable resources have great future potential to take lead to generate power and supply demand. In the present scenario there exists a few energy resources equivalent to fuel resource. So, there must be a technology to trap the waste and unutilized heat available in the atmosphere and utilize it into the form useful electrical energy. In the current situation, waste heat in the form of thermal energy is recovered and converted into conventional electrical energy. Today, 70% of produced energy in automobiles is wasted in form of heat by exhaust gases. The main outcome of this paper is to manage the waste heat is being generated in the vehicles efficiently, by introducing the concept of “Thermo Electric Generator” (TEG) which convert the waste heat produced inside the vehicles and Re-Generate in the form electric current and give it back to the “storage unit” due to “Seebeck effect” concept.

scholarly journals Design and Hardware Implementation of Portable Generator using TEG

2019 ◽  
Vol 8 (10) ◽  
pp. 843-846
Keyword(s):  
Hardware Implementation ◽  
Waste Heat ◽  
Thermal Power ◽  
Electrical Energy ◽  
Human Beings ◽  
Thermo Electric ◽  
Power Generator ◽  
The Baltic ◽  
Day By Day ◽  
Very High

Electrical energy has become a part of all human beings, the claim for electricity has been very high in the current days and hence electricity generated by usual means is not plenty. Nowadays solar, wind and thermal power station are mostly used to generate electricity. But by using this more amount of space can be occupied, fuel cost is increasing day by day, and also power consumption rate is very high in commercial sectors. So avoid these problems by using Thermo Electric power Generator (TEG). It is in the form of peltier coolers and TE generators. TE generator produces electrical energy from waste heat. It works based on principle of SEEBECK effect. It is named after the Baltic German physicist Thomas Johann seebeck. This paper proposed an idea of Design and Hardware implementation of Portable Generator using TEG. Hardware model was implemented and tested

scholarly journals CHARACTERIZATION OF EQUILIBRIUM CONDITIONS OF ADSORBED SILICA–GEL/WATER BED ACCORDING TO DUBININ–ASTAKHOV AND FREUNDLICH

2005 ◽  
Vol 4 (1) ◽  
pp. 03 ◽  
Author(s):  
M. R. A. Afonso ◽  
V. Silveira Jr.
Keyword(s):  
Silica Gel ◽  
Waste Heat ◽  
Electrical Energy ◽  
Heat Sources ◽  
Equilibrium Conditions ◽  
Cooling Systems ◽  
Freundlich Equation ◽  
Adsorbed Mass ◽  
Good Agreement

Systems of adsorption have been studied as an alternative for the cooling systems for saving electrical energy. The main advantage is the heat as the driving sources, for example, hot water or waste heat, widely used in the industries, and solar energy. The pair adsorbent/ adsorbate determines the behavior of these systems. Therefore, the knowledge of the equilibrium conditions between the adsorbent and the adsorbate is very important. The pair silica gel/water has the advantage of exploiting low-temperature heat sources. In this paper, the equilibrium conditions of the pair silica gel/water were investigated and the data were used to identify the coefficients of Dubinin-Astakhov equation and Freundlich equation. The experiments consisted of measuring temperature and pressure for different adsorbed mass of water in the adsorbent (silica gel). The amount of adsorbed mass (kg) per adsorbent mass (kg) used were: 0.007, 0.013, 0.024, 0.047, 0.092, 0.162 and 0.209. Both equations showed good agreement with experimental data, the coefficients of regression (R2) were 0.991 on the Dubinin-Astakhov equation and 0.993 for the Freundlich equation.

scholarly journals Generation of Electricity from Waste Heat

2021 ◽  
pp. 300-305
Author(s):  
Deepa S ◽  
Mohammad Rizan ◽  
Amaldev M Lal ◽  
Tritin Thomas ◽  
Fathima Hussain
Keyword(s):  
Waste Heat ◽  
Input Resistance ◽  
Electrical Energy ◽  
Boost Converter ◽  
Heat Energy ◽  
Cold Surface ◽  
Output Resistance ◽  
Thermo Electric ◽  
In Series ◽  
Electric Generation

Thermo electric generation converts heat energy into electrical energy . Power generated from TEG depends on the temperature difference between hot and cold surface . To improve the efficiency of TEG, MPPT algorithm with boost converter is used . Maximum power is obtained in the system when the output resistance of the system matches with the input resistance of TEG. By modelling the power variations generated from TEG system in series and parallel were minimized . The proposed system consists of TEG with boost converter having P& O MPPT . This paper presents simulation model of TEG module using MATLAB and is successful in generating a stable output.

scholarly journals Comparison of Cooling Methods for a Thermoelectric Generator with Forced Convection

Energies ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 3185
Author(s):  
Young Hoo Cho ◽  
Jaehyun Park ◽  
Naehyuck Chang ◽  
Jaemin Kim
Keyword(s):  
Heat Source ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Optimal Number ◽  
System Level ◽  
Cold Side ◽  
Efficient System ◽  
Fan Speed ◽  
Specific Number ◽  
Cooling Methods

A thermoelectric generator (TEG) is a clean electricity generator from a heat source, usually waste heat. However, it is not as widely utilized as other electricity generators due to low conversion efficiency from heat to electricity. One approach is a system-level net power optimization for a TEG system composed of TEGs, heat sink, and fans. In this paper, we propose airflow reuse after cooling preceding TEGs to maximize system net power. For the accurate system net power, we model the TEG system, air, and heat source with proper dimension and material characteristics, and simulate with a computational fluid dynamics program. Next, the TEG power generation and the fan power consumption are calculated in consideration of the Seebeck coefficient and internal electrical resistance varying with hot and cold side temperatures. Finally, we find the optimal number of TEGs and fan speed generating the most efficient system net power in various TEG systems. The results show that the system with a side fan with a specific number of TEGs provides a system net power up to 58.6% higher than when with a top fan. The most efficient system net power with the side fan increases up to four TEGs generating 1.907 W at 13,000 RPM.

scholarly journals CHARACTERIZATION OF EQUILIBRIUM CONDITIONS OF ADSORBED SILICA–GEL/WATER BED ACCORDING TO DUBININ–ASTAKHOV AND FREUNDLICH

2005 ◽  
Vol 4 (1) ◽  
Author(s):  
M. R. A. Afonso ◽  
V. Silveira Jr.
Keyword(s):  
Silica Gel ◽  
Waste Heat ◽  
Electrical Energy ◽  
Hot Water ◽  
Heat Sources ◽  
Equilibrium Conditions ◽  
Freundlich Equation ◽  
Adsorbed Mass ◽  
Good Agreement

Systems of adsorption have been studied as an alternative for the cooling systems for saving electrical energy. The main advantage is the heat as the driving sources, for example, hot water or waste heat, widely used in the industries, and solar energy. The pair adsorbent/ adsorbate determines the behavior of these systems. Therefore, the knowledge of the equilibrium conditions between the adsorbent and the adsorbate is very important. The pair silica gel/water has the advantage of exploiting low-temperature heat sources. In this paper, the equilibrium conditions of the pair silica gel/water were investigated and the data were used to identify the coefficients of Dubinin-Astakhov equation and Freundlich equation. The experiments consisted of measuring temperature and pressure for different adsorbed mass of water in the adsorbent (silica gel). The amount of adsorbed mass (kg) per adsorbent mass (kg) used were: 0.007, 0.013, 0.024, 0.047, 0.092, 0.162 and 0.209. Both equations showed good agreement with experimental data, the coefficients of regression (R2) were 0.991 on the Dubinin-Astakhov equation and 0.993 for the Freundlich equation.

Passive Power Generation and Heat Recovery from Waste Heat

2015 ◽  
Vol 1113 ◽  
pp. 789-794
Author(s):  
Muhammad Fairuz Remeli ◽  
Abhijit Date ◽  
Baljit Singh ◽  
Aliakbar Akbarzadeh
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Heat Pipes ◽  
Electric Heater ◽  
Cold Side ◽  
Thermo Electric ◽  
Electric Generator ◽  
System A ◽  
Good Agreement

This research presents a passive method of waste heat recovery and conversion to electricity using Thermo-Electric Generator (TEG). For this purpose, a lab scale bench-top prototype of waste heat recovery and conversion system was designed and fabricated. This bench top system consists of the thermoelectric generators (TEGs) sandwiched between two heat pipes, one connected to the hot side of the TEG and the second connected to the cold side of the TEG. A 2 kW electric heater was used to replicate the waste heat. An electric fan was used to provide air into the system. A theoretical model was developed to predict the system performance. The model was found in good agreement with the experimental data.

Effect of Electron-Phonon Coupling on Transport Properties of Monolayers of ZrS2, BiI3 and PbI2: A thermoelectric Perspective

2021 ◽  
Author(s):  
Gautam Sharma ◽  
Vineet Kumar Pandey ◽  
Shouvik Datta ◽  
Prasenjit Ghosh
Keyword(s):  
Relaxation Time ◽  
Band Structure ◽  
Transport Properties ◽  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
Waste Heat ◽  
Transport Coefficients ◽  
Electrical Energy ◽  
Phonon Coupling ◽  
Electron Phonon Coupling

Thermoelectric materials are used for conversion of waste heat to electrical energy. The transport coefficients that determine their thermoelectric properties depend on the band structure and the relaxation time of...

scholarly journals Thermoelectric Properties of Carbon Nanotubes

Energies ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 4561 ◽  
Author(s):  
Nguyen T. Hung ◽  
Ahmad R. T. Nugraha ◽  
Riichiro Saito
Keyword(s):  
Carbon Nanotubes ◽  
Figure Of Merit ◽  
Waste Heat ◽  
Quantum Confinement Effect ◽  
Electrical Energy ◽  
High Seebeck Coefficient ◽  
Te Material ◽  
P Type ◽  
State Device ◽  
Solid State Device

Thermoelectric (TE) material is a class of materials that can convert heat to electrical energy directly in a solid-state-device without any moving parts and that is environmentally friendly. The study and development of TE materials have grown quickly in the past decade. However, their development goes slowly by the lack of cheap TE materials with high Seebeck coefficient and good electrical conductivity. Carbon nanotubes (CNTs) are particularly attractive as TE materials because of at least three reasons: (1) CNTs possess various band gaps depending on their structure, (2) CNTs represent unique one-dimensional carbon materials which naturally satisfies the conditions of quantum confinement effect to enhance the TE efficiency and (3) CNTs provide us with a platform for developing lightweight and flexible TE devices due to their mechanical properties. The TE power factor is reported to reach 700–1000 W / m K 2 for both p-type and n-type CNTs when purified to contain only doped semiconducting CNT species. Therefore, CNTs are promising for a variety of TE applications in which the heat source is unlimited, such as waste heat or solar heat although their figure of merit Z T is still modest (0.05 at 300 K). In this paper, we review in detail from the basic concept of TE field to the fundamental TE properties of CNTs, as well as their applications. Furthermore, the strategies are discussed to improve the TE properties of CNTs. Finally, we give our perspectives on the tremendous potential of CNTs-based TE materials and composites.

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