Upload
others
View
1
Download
0
Embed Size (px)
Citation preview
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
2009 Thermoelectrics Applications Workshop
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
2009 Thermoelectrics Applications Workshop
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
2009 Thermoelectrics Applications Workshop
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
2009 Thermoelectrics Applications Workshop
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
2009 Thermoelectrics Applications Workshop
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)
2009 Thermoelectrics Applications Workshop
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
2009 Thermoelectrics Applications Workshop
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
2009 Thermoelectrics Applications Workshop
Technical Approaches : TEG-EG cont’d
•
TEG using Exhaust Gas [1] : –
modeling for simulation
Coolant
Heat transfe
r
9
In
Out
2009 Thermoelectrics Applications Workshop
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
2009 Thermoelectrics Applications Workshop
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
2009 Thermoelectrics Applications Workshop
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
150C 3.65 Watt 5.2V / 2.8A With cooling Fan
200C 5.68 Watt 6.7V / 3.39A With cooling Fan
12
2009 Thermoelectrics Applications Workshop
Fabrication of TEG-Radiator
Engine Coolant In
Out
Thermoelectri
c Array (11)
Heat Pipes
Heat sink
13
Radiator With Thermoelectric Generator under fabrication
2009 Thermoelectrics Applications Workshop
Fabrication of TEG-Exhaust Gas
•
Fabricated TEG using Exhaust Gas [1] :
Experimental setup for TEG-EGSupplying Exhaust Gas using a Gas Burner
14
2009 Thermoelectrics Applications Workshop
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
2009 Thermoelectrics Applications Workshop
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