Modeling and Optimization of Heat Exchanger in Automotive Exhaust Thermoelectric Generator Based on Fluid Kinematics

2014 ◽  
Vol 986-987 ◽  
pp. 848-851
Author(s):  
Xin Yu Wang ◽  
Shun Min Wang ◽  
Liang Zhou ◽  
Xi Chao Li
Keyword(s):  
Heat Exchanger ◽  
Turbulence Intensity ◽  
Thermoelectric Generator ◽  
Structural Parameters ◽  
Control Variable ◽  
Electrical Energy ◽  
Vital Role ◽  
Automotive Exhaust ◽  
Fluid Turbulence ◽  
Fluid Resistance

The HE (heat exchanger) of automotive exhaust TEG (thermoelectric generator) plays a vital role in converting thermal energy into electrical energy, therefore achieves the goal of energy conservation and emission reduction. A new regular-octagon HE is modeled and simulated in FLUENT to obtain the velocity path-lines of fluid. Through simulation results, the velocity path-line is tracked and analyzed, in order to evaluate the fluid resistance and fluid turbulence intensity. By using control variable method, a variety of HE models with different structural parameters are modeled and simulated, to optimize the structure of HE. Eventually, it is intended to design a HE with proper fluid resistance and remarkable turbulence intensity.

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 Study on the Effect of Oval Tubes on Airflow Turbulence Characteristics in Wind Tunnel

2020 ◽  
Vol 38 (2) ◽  
pp. 303-308
Author(s):  
Bo Zhao ◽  
Cheng Fu ◽  
Haitao Pei ◽  
Daxiong Liao ◽  
Bo Zhu
Keyword(s):  
Heat Exchanger ◽  
Wind Tunnel ◽  
Turbulence Intensity ◽  
Flow Direction ◽  
Structural Parameters ◽  
Simulation Method ◽  
Experimental Result ◽  
Turbulence Characteristics ◽  
Tube Heat Exchanger ◽  
Inflow Conditions

The flow Turbulence characteristics of finned oval tube heat exchanger used in wind tunnel were studied by using numerical simulation method. Firstly, the reliability of the numerical method was verified by the experimental results. And then the research was focused on the comparative analysis of the characteristics of turbulent flow downstream of heat exchanger under different inflow conditions, and the influence of the tubes number and fins spacing on the airflow turbulence and the flow field distribution downstream of heat exchanger were obtained too. The results indicate that oval tubes have a significant effect for improving the flow quality when incoming flow is inhomogeneous, and the velocity distribution behind heat exchanger tends to become uniform. Inflow conditions have a slight effect on the turbulence intensity behind heat exchanger, which mainly depends on the structural parameters of heat transfer tubes. The turbulence intensity decays very quickly in the flow direction. The value is reduced to 7.5% at the cross section 600 mm downstream of the heat exchanger inlet, which agrees well with the experimental result.

Efficiency of Microcombustion System with Thermoelectric Generator Combined with Countercurrent Heat Exchanger

2016 ◽  
Vol 685 ◽  
pp. 422-426
Author(s):  
Nikolai Belyakov ◽  
Igor Terletskii ◽  
Sergey Minaev ◽  
Sudarshan Kumar ◽  
Kaoru Maruta
Keyword(s):  
Heat Exchanger ◽  
Electric Power ◽  
Thermoelectric Generator ◽  
Combustion Products ◽  
Thermoelectric Device ◽  
Combustion Heat ◽  
Thermoelectric Element ◽  
Fresh Mixture ◽  
A Value ◽  
New System

A new system for converting combustion heat into electric power was proposed on the basis of countercurrent burner with thermoelectric element embedded in a wall separating incoming fresh mixture and combustion products. The wall serves as heat exchanger between combustion products and the fresh mixture. Numerical simulations showed that almost whole combustion heat may be transferred through the thermoelectric element in such system and the total thermal efficiency attained a value close to the conversion efficiency of the thermoelectric device itself.

The temperature distribution and electrical performance of fluid heat exchanger-based thermoelectric generator

2017 ◽  
Vol 118 ◽  
pp. 742-747 ◽  
Author(s):  
Wenkai Li ◽  
Jiangying Peng ◽  
Wanli Xiao ◽  
Honghao Wang ◽  
Jinsong Zeng ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Temperature Distribution ◽  
Thermoelectric Generator ◽  
Electrical Performance
Sign in / Sign up

Export Citation Format

Share Document