scholarly journals Design and Optimization of an Integrated Turbo-Generator and Thermoelectric Generator for Vehicle Exhaust Electrical Energy Recovery

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3134 ◽  
Author(s):  
Prasert Nonthakarn ◽  
Mongkol Ekpanyapong ◽  
Udomkiat Nontakaew ◽  
Erik Bohez
Keyword(s):  
Diesel Engines ◽  
High Performance ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Electrical Energy ◽  
Vehicle Exhaust ◽  
Gasoline Engines ◽  
Design And Optimization ◽  
Charging Station ◽  
Turbo Generator

The performance of turbo-generators significantly depends on the design of the power turbine. In addition, the thermoelectric generator can convert waste heat into another source of energy. This research aims to design and optimize an integrated turbo-generator and thermoelectric generator for diesel engines. The goal is to generate electricity from the vehicle exhaust gas. Electrical energy is derived from generators using the flow, pressure, and temperature of exhaust gases from combustion engines and heat-waste. In the case of turbo-generators and thermoelectric generators, the system automatically adjusts the power provided by an inverter. Typically, vehicle exhausts are discarded to the environment. Hence, the proposed conversion to electrical energy will reduce the alternator charging system. This work focuses on design optimization of a turbo-generator and thermoelectric generator for 2500 cc. diesel engines, due to their widespread usage. The concept, however, can also be applied to gasoline engines. Moreover, this model is designed for a hybrid vehicle. Charging during running will save time at the charging station. The optimization by variable van angles of 40°, 50°, 62°, 70°, and 80° shows that the best output power is 62°, which is identical to that calculated. The maximum power outputted from the designed prototype was 1262 watts when operating with an exhaust mass flow rate of 0.1024 kg/s at 3400 rpm (high performance of the engine). This research aims to reduce fuel consumption and reduce pollution from the exhaust, especially for hybrid vehicles.

scholarly journals Cuk Converter for Waste Heat Recovery from Automobile Engine using Thermoelectric Generator with Air as Coolant

2020 ◽  
Vol 9 (4) ◽  
pp. 249-252
Keyword(s):  
Energy Efficiency ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Combustion Engine ◽  
Electrical Energy ◽  
Internal Combustion ◽  
Heat Energy ◽  
Maximum Power

The growing concern on energy conservation and reduction of carbon footprint has led to a lot of inventions and innovations in terms of energy-efficient technologies in all the energy consuming applications. The automobile sector is a crucial zone where these technologies have a major role to play due to the sheer abundance of the number of automobiles.Many small refinements, alterations and innovations are happening in this field which has led to furthermore energy economic automobiles than before.But even in an advanced internal combustion engine, about two-thirds of fuel consumed by an automobile is discharged into the surroundings as waste heat. The effect of this is the increase in the surrounding air temperature which in turn contributes significantly to global warming. This paper proposes amethod to reduce the emission of heat from automobiles by designing and implementinga waste heat recovery system for internal combustion (IC) engines. The key aim is to reduce the amount of heat released into the environment and to convert it into useful energy. A thermoelectric generator (TEG) assembly is used to directly convert the wasted heat energy from the automobile into electrical energy. This electrical energy is conditioned using a Cukconverter and maximum power point tracking (MPPT) algorithm is embedded in the converter for impedance matching and maximum power transfer from TEG to the converter. The conditioned output is used to charge the battery of the vehicle. This methodologyalso increases the energy efficiency of the vehicle as a higher capacity battery can be employed.The proposed system can work well under varying temperature conditions to give a constant output. It can be implemented in any mechanical/ electrical systems were there is wastage of heat energy like gas pipelines, wearable electronics, space probes, cookstoves, boilers, thermal vision, etc. One of the thrust areas where this technology can be effectively utilized in today’s world is in electric vehicles where the energy efficiency is the most important factor.

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 Energy Harvesting Technology by Converting Waste Heat Energy from Automobiles

2021 ◽  
Vol 20 (4) ◽  
pp. 127-132
Author(s):  
Md Abdullah Al Rakib Rakib ◽  
Md. Saniat Rahman Zishan ◽  
Md. Abid Hasan Abid
Keyword(s):  
Energy Harvesting ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Electrical Energy ◽  
Heat Energy ◽  
Conversion Process ◽  
Energy Sources

In this project, heat energy is used for generatingelectrical energy by a conversion process. The energy harvestingfrom the heat of motorbike has become a new source of portableenergy for rechargeable gadgets. In contrary, the conventionalnonrenewable energy sources have likewise added to anexpansion in contamination on the planet and a disintegration ofhuman wellbeing. From the electrical energy, the mobile phonewill be charged. A thermoelectric generator has been connectedto the hot portion of the motorbike and while riding the bike, anykind of chargeable device will get charged. The prototype of thisresearch work has effectively harvested electrical energy fromheat using thermoelectric generator and has managed to provideenough power at different speeds of the motorbike.

Thermoelectric Power Generation by Harvesting the Waste Heat From a Car Engine

2015 ◽  
Author(s):  
Jong K. Cha ◽  
Thomas Y. Lee ◽  
Yong X. Gan
Keyword(s):  
Energy Conversion ◽  
Bismuth Telluride ◽  
Heat Sink ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Electrical Energy ◽  
High Energy ◽  
Coolant Temperature ◽  
Maximum Output ◽  
Maximum Voltage

Internal combustion (IC) engines typically have an efficiency of less than 35%. This is largely due to the fact that much of the energy dissipates into waste heat. However, the waste heat may be converted into electricity by using energy conversion modules made from bismuth telluride. In this work, it is demonstrated that electricity can be generated from waste heat due to the difference in temperatures. The thermal to electrical energy conversion is achieved by using a self-assembled thermoelectric generator (TEG). The TEG (thermoelectric generator) uses two different types of metallic compound semiconductors, known as n-typed and p-typed, to create voltage when the junctions are held at different temperatures. The work mechanism is based on the Seebeck effect. In this study, the TEGs are made from bismuth telluride (Bi-Te) with relatively high energy conversion efficiencies. In addition, it is readily available. The installation location of the TEG is studied. For testing purposes and convenience, the top of the radiator of a 1990 Mazda Miata car was chosen. The TEG and an aluminum finned heat sink were placed in order on the top of the radiator. Thermal paste was applied to both surfaces and secured with zip ties. A vent was cut on the hood of the car to promote airflow between the fins. Appropriate electrical wiring allowed the unit to output to a digital multi-meter which was located within the car for operator to take data. It is found from the measured results that 0.948 V is the maximum output and the average voltage is 0.751 V. The highest voltage came from driving mountain paths due to the heat sink and coolant temperature being higher than nominal. We estimate that placing an insulator between the heat sink and TEG would push the maximum voltage over 1.0 V. During the cool down phase, the TEG produced electricity continuously with a maximum voltage of 0.9 V right after engine cutoff. The voltage decreased to about 0.6 V within 40 minutes. It is found that the relationship between the temperature difference and output voltage is linear.

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 Temperature distribution analysis of monocrystalline photovoltaic panel for Photovoltaic-Thermoelectric generator (PV-TEG) hybrid application

2020 ◽  
Vol 17 (2) ◽  
pp. 858 ◽  
Author(s):  
Ruzaimi A. ◽  
Shafie S. ◽  
W. Z. W. Hassan ◽  
N. Azis ◽  
M. Effendy Ya'acob ◽  
...  
Keyword(s):  
Thermoelectric Generator ◽  
Waste Heat ◽  
Electrical Energy ◽  
Bottom Surface ◽  
Distribution Analysis ◽  
Photovoltaic Panel ◽  
In Series ◽  
Optimum Heat ◽  
Parallel Configuration ◽  
Temperature Levels

<span>An experiment has been carried out to prove the practicality of converting the waste heat from PV panels into electrical energy by observing the temperature levels and distribution of a conventional monocrystalline silicon (Mono c-Si) photovoltaic (PV) panels for photovoltaic-thermoelectric generator (PV-TEG) hybrid application of a Hybrid Agrivoltaic (HAV) Greenhouse System project. From the observation, highest temperature of the PV backside panel surface reached 81.1°C during solar noon and expected to reach even higher during hot season. The highest power output from the 160 numbers TEG modules in series and parallel configuration were calculated to reach 119 Watt during that time at ΔT 56.1 °C. This output is expected to fluctuate over the weather temperature fluctuation throughout the day. Meanwhile, for the heat distribution, it is best to apply the TEG arrays with optimized PV angle setup, where the temperature seems to be distributed evenly at all time, to provide optimum heat source to the TEG modules. It was concluded that the excess heat from the bottom surface of PV panels can be utilize by converting the heat via temperature differential to harvest additional electrical energy by integrating TEG system, hence maximizing the potential of solar radiation capacity in generating clean renewable energy.</span>

scholarly journals Renewable Energy from Cooking Stove Waste Heat Energy using Thermoelectric Generator for Night Market Application

2019 ◽  
Vol 8 (4) ◽  
pp. 1250-1255
Keyword(s):  
Seebeck Coefficient ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Electrical Power ◽  
Electrical Energy ◽  
Small Magnitude ◽  
Excess Heat ◽  
Electric Generator ◽  
In Series ◽  
The Cost

Malaysia night market normally operated along a temporarily closed road. No electrical power provided by the authorities and therefore hawkers need to prepare their own. Currently, they are working with gasoline-electric generator. On top of the cost incurred, they also need to consume exhaust gas and noise from the machine. Further, this situation will also affect customers. With a high percentage of the hawkers involve with cooking activities using the LPG gas stove, excess heat is one of the potential energy which can be converted into electrical energy using a thermoelectric generator (TEG). The aim of this study is to convert the excess heat available used to powered night market electrical facilities. A set of experiments was conducted utilizing five units of TEG connected in series to convert excess heat from a butane gas stove to electrical power. The temperature at both the hot and cold sides of the TEG was recorded used to analyze the effect of power produced. Two electrical parameters namely voltage and current outputs were measured used to calculate the electrical power generated. The analysis focused on the two main governing parameters namely temperature different and Seebeck coefficient toward power generated. It was found that only some amount of excess heat was converted which produced up to 46.8 mW electrical power. This is based on the high temperature recorded at the cold side of the TEG. The almost constant trend showed in temperature different was contributed to a small magnitude of the Seebeck coefficient and so for the power generated. The trend showed by the power generated was also almost constant even the temperature on the hot side keep increasing. The energy conversion process was considered success and can be further increased by increasing the number of TEG units used as well as by incorporating a cooling mechanism as practiced by many researchers.

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