scholarly journals Performance Assessment of Thermoelectric Generators with Application on Aerodynamic Heat Recovery

Micromachines ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1399
Author(s):  
Xiaodong Jia ◽  
Shifa Fan ◽  
Zhao Zhang ◽  
Hongbiao Wang
Keyword(s):  
Mach Number ◽  
Energy Conversion ◽  
Energy Recovery ◽  
Heat Energy ◽  
Aerodynamic Heating ◽  
Thermoelectric Generators ◽  
Flight Altitude ◽  
Energy Recovery System ◽  
Recovery System ◽  
Heat Energy Recovery

Based on thermoelectric generators (TEGs), an aerodynamic heat energy recovery system for vehicle is proposed. A mathematical model describing the energy conversion law of the system is established, and the integrated calculation method which combined aerodynamic heating and thermoelectric (TE) conversion is given. Furthermore, the influences of the typical flight Mach number, flight altitudes and the length of TE legs on the energy conversion behavior of energy recovery systems are investigated. The performance of the energy recovery system is analyzed and evaluated. The results show that, the decrease of flight altitude and the increase of Mach number will obviously improve the performance of the heat energy recovery system with TEGs. The increase of leg length will increase the temperature of the hot end of TEGs and reduce the heat absorbed at the hot end. When the external load, Mach number and flight altitude is fixed, there exists an optimal length of legs corresponding to the maximum output power and maximum conversion efficiency of the system. The results will have significant positive impact on thermal protection and management of supersonic / hypersonic vehicles.

scholarly journals A heat energy recovery system from tunnel waste water

2018 ◽  
Vol 5 (5) ◽  
pp. 300-308 ◽  
Author(s):  
Nicholas Hytiris ◽  
Konstantinos Ninikas ◽  
Rohinton Emmanuel ◽  
Bjorn Aaen ◽  
Paul L Younger
Keyword(s):  
Waste Water ◽  
Energy Recovery ◽  
Heat Energy ◽  
Energy Recovery System ◽  
Recovery System ◽  
Heat Energy Recovery

scholarly journals Improving spark-ignited engines efficiency by heat energy recovery system

2015 ◽  
Vol 161 (2) ◽  
pp. 64-67
Author(s):  
Marek SUTKOWSKI
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Emissions ◽  
Energy Recovery ◽  
Laboratory Tests ◽  
Heat Energy ◽  
Efficiency Improvement ◽  
Energy Recovery System ◽  
Recovery System ◽  
Commercial Operation ◽  
Heat Energy Recovery

The current trends in regulations changes focus more and more on emissions reduction. Earlier environment protection mechanisms covering emissions limits of particulates, nitrogen oxides, sulphur oxides and carbon monoxide were recently extended also to cover carbon dioxide emissions. One way to reduce carbon dioxide emission is the improvement of the efficiency of a powertrain system or main driver efficiency. This paper explains main limitations for efficiency improvement when conventional methods are used. The effective heat energy recovery system principles and its technical specification are described including its control principles. System was initially tested in the engine laboratory and experience from the laboratory tests is included in the paper. After successful and promising laboratory tests the solution was transferred to commercial operation which covered already period of more than 2 years. Statistics and operational data from commercial operation is shown with relevant examples of various operational modes. At the end of the paper simple feasibility study is shown. Alternative applications with basic evaluation of their feasibility and efficiency improvement potential are included in this paper as well.

scholarly journals Development of portable measuring system for testing of electrical vehicle’s heat energy recovery system

2016 ◽  
Vol 3 (1-2.) ◽  
Author(s):  
Kornél Sarvajcz ◽  
Angela Váradiné Szarka
Keyword(s):  
Energy Recovery ◽  
Internal Combustion ◽  
Heat Energy ◽  
Measuring System ◽  
Current Phase ◽  
Consumer Society ◽  
Energy Recovery System ◽  
Electrical Vehicles ◽  
Recovery System ◽  
Heat Energy Recovery

Nowadays the consumer society applies a huge amount of energy in many fields including the transportation sector. The application of the internal combustion vehicles contribute substantially to the air pollution. An alternative solution for reducing energy consumption is replacing the internal combustion vehicles by electrical or hybrid vehicles. Today one of the biggest disadvantages of the electrical vehicles is the finite capacity of batteries. The research topic presented in this paper is the „Energy Harvesting”, and development of energy recovery system for electrical vehicles which largely contributes in increasing the driving range. At the current phase of the research efficiency analysis of the heat energy recovery devices are investigated in real driving circumstances. Computer based mobile and wireless measurement system for the analysis was developed, tested and installed in a real vehicle. Driving tests were performed and analysed in different circumstances.

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