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Renewable energy of waste heat recovery system for automobiles
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Image of FIG. 1.
FIG. 1.

Concept of the system architecture: series simulations including a TEG module analysis, design of fin configurations, and distribution of thermal field investigated to test and to verify the simulation and experiment results.

Image of FIG. 2.
FIG. 2.

Network of thermal resistors with a pair of TEG models.

Image of FIG. 3.
FIG. 3.

Power output vs applied pressure (0.105, 0.209, and ) and load resistance at a fixed temperature difference ( or 303 K at the cold side).

Image of FIG. 4.
FIG. 4.

For comparison with the theoretical value, the power output of a TEG module is studied with varied temperature differences and pressures of 0.105, 0.209, and .

Image of FIG. 5.
FIG. 5.

Simulation of the system to recover waste heat: (a) CSHE (heat sinks) with 10, 22, and 44 fins, (b) HSHE with and without a fin structure, (c) prototype of the system, including fans, CSHE (heat sinks), HSHE (exhaust pipe), internal flow (exhaust gas), and TEG modules.

Image of FIG. 6.
FIG. 6.

Average temperature of the exhaust gas in the outlet of exhaust pipe measured with varied engine rate.

Image of FIG. 7.
FIG. 7.

Simulation results: (a) steady-state power output with varied external flow speed (fan flow rate) and compared with heat-sink configurations. [(b) and (c)] Average junction temperatures of front and back sections as a function of number of fins.

Image of FIG. 8.
FIG. 8.

Scheme of waste heat harvesting system. (a) A fin-structured HSHE. (b) A frame of TEG modules mounted on the HSHE. (c) Cooling system anchored on the frame to dissipate heat of the cold side of TEG module. (d) Total view of the waste heat harvesting system.

Image of FIG. 9.
FIG. 9.

Output power of both simulations and measurements with engine rate from 1000 to 3500 rpm.

Image of FIG. 10.
FIG. 10.

Impedance-matching measurement recorded on varying the external load from 1 to . The maximal power was generated in a range of external load of .


Generic image for table
Table I.

Material properties at 300 K used in simulation.

Generic image for table
Table II.

Boundary conditions in these series simulations.


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Scitation: Renewable energy of waste heat recovery system for automobiles