scholarly journals Influence of Temperature on Characters of Thermoelectric Generators Based on Test Bed

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Zongzheng Ma ◽  
Xinli Wang ◽  
Anjie Yang
Keyword(s):  
Seebeck Coefficient ◽  
Thermoelectric Generator ◽  
Combustion Engine ◽  
Vertical Direction ◽  
Cooling Effect ◽  
Air Cooling ◽  
Thermoelectric Generators ◽  
Test Bed ◽  
Influence Of Temperature ◽  
Influence Of Temperature On

In order to achieve the energy recovery of the coolant heat for internal combustion engine (ICE) using the thermoelectric generation (TEG) technology, one test bed for studying the influence of temperature on the characters of thermoelectric generators was established and the relationship between the temperature and characters of thermoelectric generator was researched based on it. The results showed that the cooling effect improved with the increase of fan speed which the fan was installed in the vertical direction of the radiator, but the cooling effect had a limit speed value. And it also indicated that the forced air cooling was better than the natural convection cooling method which can effectively reduce the temperature of the cold end while it has little effect on the hot end temperature. Moreover, the Seebeck coefficient was reduced with the increase of temperature difference between the two ends of thermoelectric generator and the Seebeck coefficient was also declined with one end temperature rise when the other end temperature was constant.

Flexible film-based thermoelectric generators

MRS Advances ◽  
2019 ◽  
Vol 4 (30) ◽  
pp. 1691-1697
Author(s):  
Shuping Lin ◽  
Wei Zeng ◽  
Lisha Zhang ◽  
Xiaoming Tao
Keyword(s):  
Seebeck Coefficient ◽  
Thermoelectric Generator ◽  
Low Cost ◽  
Thermoelectric Generators ◽  
Polystyrene Sulfonate ◽  
Paper Substrate ◽  
Thermoelectric Element ◽  
Flexible Film ◽  
P Type ◽  
Flexible Thermoelectric

ABSTRACT:The present work highlights the progress in the field of flexible thermoelectric generator (f-TEGs) fabricated by 3-D printing strategy on the typing paper substrate. In this study, printable thermoelectric paste was developed. The dimension of each planer thermoelectric element is 30mm*4mm with a thickness of 50 μm for P-type Bismuth Tellurium (Bi2Te3)-based/ poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) leg. A single thermoleg with this dimension can generate a voltage of 5.38 mV at a temperature difference of 70 K. The calculated Seebeck Coefficient of a single thermoleg is 76.86 μV/K. This work demonstrates that low-cost printing technology is promising for the fabrication of f-TEGs.

Simulink Model of a Thermoelectric Generator for Vehicle Waste Heat Recovery

2021 ◽  
Vol 11 (3) ◽  
pp. 1340
Author(s):  
Nicolae Vlad Burnete ◽  
Florin Mariasiu ◽  
Dan Moldovanu ◽  
Christopher Depcik
Keyword(s):  
Flow Velocity ◽  
Power Output ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Combustion Engine ◽  
Maximum Error ◽  
Junction Temperature ◽  
Air Cooling ◽  
Simulink Model ◽  
Use Of Resources

More than 50% of the energy released through combustion in the internal combustion engine (ICE) is rejected to the environment. Recovering only a part of this energy can significantly improve the overall use of resources and the economic efficiency of road transport. One solution to recoup a part of this otherwise wasted thermal energy is to use thermoelectric generator (TEG) modules for the conversion of heat directly into electricity. To aid in development of this technology, this effort covers the derivation of a respectively simple steady-state Simulink model that can be utilized to estimate and optimize TEG system performance for ICEs. The model was validated against experimental data found in literature utilizing water cooling for the cold side. Overall, relatively good agreement was found with the maximum error in generated power around 10%. Following, it was investigated whether air can be used as a cooling medium. It was established that, at the same temperature as the water (18.4 °C), a flow velocity of 13.1 m/s (or 47.2 km/h) is required to achieve a similar cold junction temperature and power output. Subsequently using the model with air cooling, the performance of a TEG installed on a heavy-duty vehicle traveling at 50, 80, 90, and 120 km/h under different ambient temperatures was analyzed. It was determined that both a lower temperature and a higher flow velocity can improve power output. A further increase of the power output requires a larger temperature gradient across the module, which can be achieved by a higher heat input on the hot side.

scholarly journals Dynamic Response of a Casting Crane Rigid-Flexible Coupling System to High Temperature

2020 ◽  
Vol 2020 ◽  
pp. 1-15 ◽  
Author(s):  
Yunsheng Xin ◽  
Qing Dong ◽  
Qisong Qi ◽  
Qinglu Shi
Keyword(s):  
Alloy Steel ◽  
Dynamic Characteristics ◽  
Lagrange Equation ◽  
Design Stage ◽  
Main Beam ◽  
Test Bed ◽  
Influence Of Temperature ◽  
Direct Integration Method ◽  
Different Temperatures ◽  
Influence Of Temperature On

To determine the influence of temperature on the mechanical properties of crane metal structures, three Q355 alloy steel samples were processed and their elastic moduli were tested at different temperatures using a metal tension test bed. The constitutive equation for the elastic modulus of Q355 alloy steel at different temperatures was predicted using test data and a neural network algorithm. Based on crane structural characteristics and the principle of system dynamics, a coupling vibration model was established that included the crane flexible girder, cabin, trolley, crane, and temperature. System motion equations were established according to the Lagrange equation, and the approximate solution of nonlinear system vibration was solved by the direct integration method (the Newmark method). The dynamic characteristics of the main beam and cabin were analyzed at different temperatures, as well as safety during service. The results show that, with increasing temperature, the maximum midspan displacement of the main beam increases gradually, by 14.3%, 21.4%, and 57.1% at temperatures of 300°C, 400°C, and 600°C, respectively. The cabin vibration displacement increases with temperature, by up to 32.5% at 600°C, but the influence of temperature on cabin vibration acceleration is not obvious. It was concluded that the influence of temperature on the dynamic characteristics of the main beam must be considered during the design stage of cranes. The proposed model and analysis method provide a theoretical basis for the design of casting cranes according to temperature.

The effect of temperature on high-resolution TEM image contrast

1995 ◽  
Vol 53 ◽  
pp. 640-641
Author(s):  
T. Geipel ◽  
W. Mader ◽  
P. Pirouz
Keyword(s):  
Form Factor ◽  
Inelastic Scattering ◽  
Accurate Method ◽  
Waller Factor ◽  
Effect Of Temperature ◽  
Specimen Thickness ◽  
Influence Of Temperature ◽  
Debye Waller Factor ◽  
Influence Of Temperature On ◽  
Atomic Form Factor

Temperature affects both elastic and inelastic scattering of electrons in a crystal. The Debye-Waller factor, B, describes the influence of temperature on the elastic scattering of electrons, whereas the imaginary part of the (complex) atomic form factor, fc = fr + ifi, describes the influence of temperature on the inelastic scattering of electrons (i.e. absorption). In HRTEM simulations, two possible ways to include absorption are: (i) an approximate method in which absorption is described by a phenomenological constant, μ, i.e. fi; - μfr, with the real part of the atomic form factor, fr, obtained from Hartree-Fock calculations, (ii) a more accurate method in which the absorptive components, fi of the atomic form factor are explicitly calculated. In this contribution, the inclusion of both the Debye-Waller factor and absorption on HRTEM images of a (Oll)-oriented GaAs crystal are presented (using the EMS software.Fig. 1 shows the the amplitudes and phases of the dominant 111 beams as a function of the specimen thickness, t, for the cases when μ = 0 (i.e. no absorption, solid line) and μ = 0.1 (with absorption, dashed line).

The Influence of Temperature on Successful Reproductions of Burbot, Lota Lota (L.) Under Hatchery Conditions

2010 ◽  
Vol 25 (1) ◽  
pp. 93-105 ◽  
Author(s):  
Daniel Żarski ◽  
Dariusz Kucharczyk ◽  
Wojciech Sasinowski ◽  
Katarzyna Targońska ◽  
Andrzej Mamcarz
Keyword(s):  
Lota Lota ◽  
Influence Of Temperature ◽  
Influence Of Temperature On

PERFORMANCE ASSESSMENT OF A LARGE INTERNAL COMBUSTION ENGINE DUE TO INLET AIR COOLING AND DEHUMIDIFICATION: A SIMULATION USING GT-POWER SOFTWARE

2020 ◽  
Author(s):  
Israel Campbell ◽  
Andre Chun ◽  
Bruno Muniz de Freitas Miotto ◽  
José Joaquim Conceição Soares Santos ◽  
João L M Donatelli ◽  
...  
Keyword(s):  
Internal Combustion Engine ◽  
Performance Assessment ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Air Cooling
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