Elastic aerogel thermoelectric generator with vertical temperature-difference architecture and compression-induced power enhancement

Nano Energy ◽  
2021 ◽  
Vol 90 ◽  
pp. 106577
Author(s):  
Xiaodong Wang ◽  
Lirong Liang ◽  
Haicai Lv ◽  
Yichuan Zhang ◽  
Guangming Chen
Keyword(s):  
Temperature Difference ◽  
Thermoelectric Generator ◽  
Vertical Temperature ◽  
Power Enhancement

scholarly journals Vertical Gradient Temperature Difference of the Main Arch with Single Pipe Section in Tibet Based on Statistical Analysis

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Tuo Shi ◽  
Nianchun Deng ◽  
Zheng Chen ◽  
Haoxu Li
Keyword(s):  
Temperature Difference ◽  
Return Period ◽  
Vertical Gradient ◽  
Steel Tube ◽  
Observation Data ◽  
Positive Temperature ◽  
Vertical Temperature ◽  
Standard Values ◽  
Single Pipe ◽  
Main Arch

A 75 m long experimental arch with a 1.6 m diameter was constructed in Tibet for a one-year test to determine the most unfavourable vertical temperature difference for a single pipe in the main arch of a concrete-filled steel tube arch bridge. Actual temperature observation data were used to analyse the vertical temperature difference in the single circular pipe arch rib using statistical methods. The standard value for the vertical temperature difference in the single pipe under a return period of 50 years was calculated. The results showed that the influence range of the vertical gradient temperature was 25 cm. The vertical temperature difference followed a lognormal distribution, and the standard values of the positive temperature difference at the upper and lower ends of the single pipe were 16 and 10°C, respectively; the standard values of the negative temperature difference at the upper and lower ends of the single pipe were both -8°C under a return period of 50 years. These results are considerably different from the values specified in the current Chinese code. These could serve as references for calculations involving arch bridges in Tibet with single circular pipes in the main arches.

scholarly journals Variable temperature effects on TEG performance

2019 ◽  
Vol 128 ◽  
pp. 07004
Author(s):  
Björn Pfeiffelmann ◽  
Cansu Özman ◽  
Ali Cemal Benim ◽  
Franz Joos
Keyword(s):  
Experimental Investigation ◽  
Temperature Difference ◽  
Temperature Effects ◽  
Thermoelectric Generator ◽  
Variable Temperature ◽  
Local Temperature ◽  
Cold Side ◽  
Temperature Variations ◽  
Substantial Temperature

The present paper presents an experimental investigation of the variable temperature effects on the performance of a Thermoelectric Generator (TEG). In the conducted experiments, a sample TEG is analyzed by imposing variable temperature patterns on the cold side, while keeping the temperature uniformon the hot side. The achieved local temperature variations on the cold side has approximately been about 8% of the temperature difference between the hot and cold sides. The results reveal that the TEG performance shows some variation with the applied variable temperature patterns, which remains, however,rather small for the applied temperature variations. For achieving a more clear answer to the present question, further experiments need to be designed where more substantial temperature variations canbeobtained.

Micro-Thermoelectric-Generator Design and Analysis Based on Catalytic Combustion of Hydrogen

2011 ◽  
Vol 216 ◽  
pp. 713-717
Author(s):  
Feng Wang ◽  
Guo Qiang Wang ◽  
Jing Zhou ◽  
Xin Jing Zhou
Keyword(s):  
Temperature Difference ◽  
Catalytic Combustion ◽  
Thermoelectric Generator ◽  
Reaction Rate ◽  
Total Efficiency ◽  
Design And Optimization ◽  
Heating And Cooling ◽  
Micro Thermoelectric Generator ◽  
Generator Design ◽  
Combustion Of Hydrogen

The micro-thermoelectric-generator based on combustion of hydrogen and oxygen was designed. With the application of general finite reaction rate model in CFD software of FLUENT, the effect of inlet parameters on the highest temperature difference between the hot and cold plate of the generator was studied. Results show that, the temperature in the heating and cooling channel of the micro-thermoelectric-generator is uniform; With the increasing of inlet reactant temperature, the highest temperature difference increases, but the total efficiency of the generator decreases. Results can be used to the further design and optimization of micro-thermoelectric-generator based on hydrogen catalytic combustion.

Design of a Novel Heat Exchanger Using in Automobile Exhaust Thermoelectric Generator

2012 ◽  
Vol 430-432 ◽  
pp. 1428-1432
Author(s):  
Rui Quan ◽  
Xin Feng Tang ◽  
Shu Hai Quan ◽  
Ji Guang Wang
Keyword(s):  
Heat Exchanger ◽  
Temperature Distribution ◽  
Surface Temperature ◽  
Temperature Difference ◽  
Thermoelectric Generator ◽  
Thermoelectric Modules ◽  
Automobile Exhaust ◽  
Surface Temperature Distribution ◽  
Output Performance ◽  
Automobile Exhaust Thermoelectric Generator

The output performance of Automobile Exhaust Thermoelectric Generator (AETEG) is related to the temperature difference and electric connection topology of thermoelectric modules, in order to decrease the ring current among the thermoelectric modules in parallel with different temperature difference and enhance the output performance, a novel heat exchanger using in AETEG is designed in this paper. The interior structure of heat exchanger with fishbone is analysed, then its surface temperature distribution is simulated with ANSYS software and experimented with thermal imaging instrument. Both of the results show that the surface temperature distribution of the fishbone heat exchanger designed in this paper is more uniform in lateral direction and dispalys an obvious gradient in fore-and-aft surface, compared with the one of cavity designed before, the novel heat exchanger has overwhelming advantage in the output performance of AETEG, and the method adopted in this paper is feasible and practical.

scholarly journals The Characterization of Thermoelectric Generator in Utilizing the Heat Waste of the Biomass Egg Drying Machine

2020 ◽  
Vol 3 (1) ◽  
pp. 30-33
Author(s):  
Sudarmanto Jayanegara ◽  
Zuryati Djafar ◽  
Zulkifli Djafar ◽  
Nasaruddin Azis ◽  
Wahyu Haryadi Piarah
Keyword(s):  
Heat Exchanger ◽  
Rice Husk ◽  
Temperature Difference ◽  
Thermoelectric Generator ◽  
Electrical Energy ◽  
Voltage Difference ◽  
Furnace Fuel

This research was conducted to determine the character of the TEG module as a source of electrical energy in utilizing heat in the chimney wall of an egg rack drying machine that uses rice husk as engine furnace fuel. The test is carried out by utilizing heat on 2 pieces of chimney (upper chimney and lower chimney) separated by a Heat Exchanger (HE) with a furnace blower speed of 2600 rpm and environmental blower speed of 2800 rpm with the amount of thermoelectric used as many as 44 units. The results show that the TEG module in the upper chimney obtained temperature difference (∆T), voltage difference (∆V) and power (P) respectively ∆T 38.75 ° C; ∆V 3.68 Volts; P 0.796 Watt and for the lower chimney respectively ∆T 73.25 ° C; ∆V 12.26 Volts; P 2.446 Watt.

scholarly journals THE INFLUENCE OF AMBIENT CONDITIONS ON THE PERFORMANCE OF THE THERMOELECTRIC WIRELESS SENSOR NETWORK NODE

2019 ◽  
pp. 089
Author(s):  
Dejan Milić ◽  
Aneta Predrag Prijić ◽  
Ljubomir Vračar ◽  
Zoran Prijić
Keyword(s):  
Wireless Sensor Network ◽  
Ambient Temperature ◽  
Sensor Network ◽  
Temperature Difference ◽  
Thermoelectric Generator ◽  
Open Circuit ◽  
Wireless Sensor ◽  
Network Node ◽  
Ambient Conditions ◽  
Hot Surface

This paper considers the effects of the ambient temperature and unducted air flow on the voltage generated by a thermoelectric generator used to power wireless sensor network node. Structure of the node is simulated using a fully coupled numerical electro--thermal model with convective correlations. Results show that the effect of the ambient temperature is negligible as long as the temperature difference between the hot surface of the node and the ambient is maintained. For natural convection, voltage dependence on the temperature difference can be determined from the open circuit conditions and this can be used to approximate the load conditions. For forced convection, an increase rate of the generated voltage is governed by the thermal resistance of the heatsink and characteristic parameters of the thermoelectric generator.

EFFECT OF VERTICAL TEMPERATURE DIFFERENCE AND LOCAL AIRFLOW ON PRODUCTIVITY

2019 ◽  
Vol 84 (764) ◽  
pp. 927-936
Author(s):  
Akemi IWAKI ◽  
Takashi AKIMOTO ◽  
Takuya FURUHASHI
Keyword(s):  
Temperature Difference ◽  
Vertical Temperature
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