development of low and high temperature thermoelectric ... · thermoelectric generation waste heat...

Development of Low and high

Temperature Thermoelectric Generators

for Automotive Waste Heat Recovery

SystemSoonseo Park, Jungho Yoo, Sungkyu Cho, Moongyu Jang#, and

Shiho Kim

Head Director, RAVERS Department of Electrical Engineering

Chungbuk National University, Korea# : Convergence and Components & Materials Research Lab,

ETRI, Korea

2009 Thermoelectrics Applications Workshop Hotel Del Coronado, San Diego, CA

September 29 –

October 1, 2009

2009 Thermoelectrics Applications Workshop

Outline

•

Introduction to RAVERS

•

Goal and Objectives of R & D

•

Technical Approaches

•

Experiment and Fabrication results

•

Summary and Further works

1


Introduction to RAVERS

•

Research Center for Advanced Hybrid Electric Vehicle

Energy Recovery System(RAVERS) at CBNU

•

Supported by Korean government (Ministry of Knowledge Economy, MKE) and Chungbuk Provincial government

•

RAVERS collaborates with Major Korean motor companies and Battery and Ultra Cap makers for development of TE-

HEV and Battery management system of HEVs.

2


Goal and Objectives of R & D

•

Developing a Low and high Temperature Dual Thermoelectric Generation Waste Heat Recovery System for Light-Duty Vehicles –

More than 10% Fuel Efficiency Improvement for the light-duty vehicles with Gasoline or LPG engines

–

Target vehicle is a compact passenger car with engine size from 1500 to 2000 cc

–

Developing superlattice TEM for high temp and low cost material as well as an environmentally nonhazardous substance

–

Design Optimization & Performance Analyses for Integrated TE System

–

System-Level Analysis and Testing of Advanced TE Materials

3


Achievement Plan

•

Phase I (2009 -2010)–

Developing 1KW TEG for a light-duty vehicle by the end of FY2010

–

Replacing an Alternator of conventional ICE vehicles

•

Phase II (2011 -2012)–

Developing 5KW TEG for a light-duty vehicle by the end of FY2012

–

TE module will be adapted to regenerative breaking HEVs

•

Phase III (2013 -2014)–

Development of TE-HEV for Plug-in HEVs

–

Due to the TE power generation, the engine size can be reduced

4


Technical Approaches: Phase I

•

Dual Thermoelectric Generation Waste Heat Recovery System–

Low temperature generator using Radiators : ~100W

–

High temperature generator using exhaust gas : ~1KW

5


Technical Approaches: TEG-Radiator

Engine Coolant InOut

Thermoelectri

c Array

Heat Pipes

Heat sink

Hot side

Cool side

6

Conceptual diagram of Radiator With Thermoelectric Generator (1)


Technical

Approaches : TEG-R cont’d

•

TEG using Radiator (2)

TE

M

Coolant in

Heat Spreader

Heat Pipes

out

Engine Coolant In

OutA TEG element

Radiator With Thermoelectric Generator(2)

7


Technical Approaches:TEG-EG

•

TEG using Exhaust Gas [1]

Cross sectional view

Heat absorption(Evaporator) section

OutIn Adiabatic section

Exothermic(Condenser) sectionHeat

pipes

TE module

Exhaust pipe

Aux CoolantHeat pipe

Exhaust pipe

Thermoelectric module

8


Technical Approaches : TEG-EG cont’d

•

TEG using Exhaust Gas [1] : –

modeling for simulation

Coolant

Heat transfe

r

9

In

Out


Technical Approaches : TEG-EG cont’d

•

TEG using Exhaust Gas [1] : simulation results

1

MN

MX

XY

Z

384.721

408.683432.646

456.608480.571

504.533528.495

552.458576.42

600.383

JUL 7 200907:38:37

NODAL SOLUTION

STEP=1SUB =1TIME=1TEMP (AVG)RSYS=0SMN =384.721SMX =600.383

1

MN

MX

X

Y

Z

429.669

448.649467.629

486.609505.59

524.57543.55

562.531581.511

600.491

JUL 7 200908:17:00

NODAL SOLUTION

STEP=1SUB =1TIME=1TEMP (AVG)RSYS=0SMN =429.669SMX =600.491

(a) Using long heat pipes, (b) using short heat pipes

10


Experiment using cooler with heat pipes

•

Thermoelectric Generator with loop thermosiphons and heat spreader for air cooling system

TE

M

Heat Spreader

Heat Pipes

11

40 mm


Experiment using cooler with heat pipes (2)

•

Experimental Results–

4cm x 4cm Bi2Te3 Thermoelectric Device

–

Ambient temperature of Lab is about 30C

Temp (Hot side)

Power max V open/I short Remark

100C 0.64 Watt 2.2V / 1.2A Without cooling Fan

100C 1.44 Watt 3.3V / 1.75A With cooling Fan



12


Fabrication of TEG-Radiator

Engine Coolant In

Out

Thermoelectri

c Array (11)

Heat Pipes

Heat sink

13

Radiator With Thermoelectric Generator under fabrication


Fabrication of TEG-Exhaust Gas

•

Fabricated TEG using Exhaust Gas [1] :

Experimental setup for TEG-EGSupplying Exhaust Gas using a Gas Burner

14


Fabrication of Automobile simulator

•

Automobile simulator under manufacturing

Half car having an Engine and front wheel drive train withElectric break system with load control

15


Summary and Further Works

•

We have developed a Low and high Temperature Dual Thermoelectric Generation Waste Heat Recovery System –

For compact size passenger Vehicles–

Primary high Temperature heat exchanger designed to recover waste heat from the exhaust gas

–

Secondary low temperature Thermoelectric Generator using coolant

of a Radiator.

•

Manufacturing first Prototype of heat exchanger using Thermosypons will be finished at the end of this year

•

Development of superlattice for high temp and low cost TE material as well as environmentally nonhazardous material for Phase II

16

Thank you for your attention

ACKNOWLEDGMENT This work was supported by the MKE under the ITRC support program

supervised by the NIPA

(C1090-0904-0007).

17

Slide Number 1OutlineIntroduction to RAVERSGoal and Objectives of R & D Achievement Plan Technical Approaches: Phase ITechnical Approaches: TEG-RadiatorTechnical Approaches : TEG-R cont’dTechnical Approaches:TEG-EGTechnical Approaches : TEG-EG cont’dTechnical Approaches : TEG-EG cont’dExperiment using cooler with heat pipesExperiment using cooler with heat pipes (2)Fabrication of TEG-RadiatorFabrication of TEG-Exhaust Gas Fabrication of Automobile simulator Summary and Further WorksSlide Number 18

development of low and high temperature thermoelectric ... · thermoelectric generation waste heat...

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