DESIGN AND CONTROL OF

runmidgeAI and Robotics

Oct 20, 2013 (3 years and 11 months ago)

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DESIGN AND CONTROL OF

HI GH
TEMPERATURE PEM FUEL CELL SYSTEMS
USI NG METHANOL REFORMERS

-

AI R OR L I QU I D H E AT I N T E GR AT I ON
-

S ØR E N J. AN D R E AS E N


A S S OC I A T E

P R OF E S S OR,
F U E L

C E L L A N D
B A T T E R Y

R E S E A R CH
GR OU P


Outline




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Introduction


S
ystem
control

approach


Methanol

reformers and HTPEM
fuel

cells


Air heat
exchange


Liquid heat
exchange


System
control

challenges


Conclusion


System
control

approach




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System

Design

Component
Characterization
/
Modelling

Control

Strategy

Development

Controller

Evaluation

/
Implementation



PBI
-
based

MEAs

have a
hi gh

t ol er ance t o CO


A
l i qui d

f uel
,
such

as
met hanol

i s
easi l y

accessabl e

and
st or abl e


Heat
can

be

ut i l i l zed

i n
f uel

conver si on


Syst em
ener gy

densi t y

i ncr ease

i s ”
cheap





Syst em
si ze

and
compl exi t y

i ncr eases


I mpur i t i es

ar e

i nt r oduced

Reformed

methanol

HTPEM
fuel

cell

systems




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Compl i cat ed

syst em
dynami cs

of t en

r equi r e

hybr i di zat i on

wi t h
el ect r i cal

ener gy

st or age

f or
hi gh

l i f et i me

and
r el i abi l i t y



I mpr ovement s

i n l oad
f ol l owi ng

coul d

be

at t ai ned

usi ng

cont r ol

schemes

Applications


Hybridization




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Cat hode ai r
cool ed

FC
st acks

have
hi gh

qual i t y

wast e

heat
t hat

can

be

di r ect l y

t r ansf er r ed and
used

f or evapor at i on of
r ef or mer
f uel
.



Pr oper heat i nt egr at i on
and desi gn i s
r equi r ed

t o
avoi d

hi gh

BoP

consumpt i on
.


Reformer system
-

air heat
exchange




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I ndi vi dual

syst em component s
ar e

char act er i zed

ex
-
si t u
,
such

t hat

f uel

cel l

st ack

and r ef or mer syst em
behavi our

can

be

separ at ed
.



Fuzzy

l ogi c

/ Neur al
net wor k

model s of
i nt er nal

syst em
st at es
,
can

be

devel oped



Model
based

cont r ol

appr oaches

ar e

i mpl ement ed

i n syst em sof t war e and
syst em
i mpr ovement s

ar e

quant i f i ed
.


Reformer system
-

air heat
exchange




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Serenergy

H3
-
350
off
-
grid

battery

charger

(HTPEM + SR)

Reformer system
-

air heat
exchange




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Exampl e
:
Ext ensi ve

ex
-
si t u

r ef or mer
out put gas
measur ement s

usi ng

gas
anal yzer s

cr eat e

t he
f oundat i on

f or

l ear ni ng
” syst em
behavi our

by an
Adapt i ve
Neur o
-
Fuzzy

I nf er ence

Syst em ( ANFI S) model.



Pr oper
pr edi ct i on

of gas
composi t i on
,
anode
st oi chi omet r y
, et c.
can

enabl e

hi gher

ef f i ci ency
,
r el i abi l i t y

and
l i f et i me
.


Reformer system
-

liquid

heat
exchange




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Li qui d heat t r ansf er
can

mi ni mi ze

syst em
si ze

and
BoP

power
consumpt i on
.



Syst em
l ogi st i cs

ar e

mor e
convent i onal
.



Sever al

syst em
t opol ogi es

ar e

usabl e

dependi ng

on
appl i cat i on

ut i l i t y

heat and
demand
.


Pump f l ow
det er mi nes

usabl e

hydr ogen f l ow i n t he
FC anode, but
f uel

evapor at i on and
conver si on

need

t o
be

consi der ed
.



A
model based

appr oach
can

be

used

f or
pr oper
f eedf or war d

cont ol

and
det er mi nat i on of syst em
set poi nt s
.



For
exampl e

ANFI S
model l i ng

can

pr ovi de
hi gh

pr esci si on

st at e

pr edi ct i on

based

on
exper i ment al

r esul t s

avoi di ng

undesi r ed

syst em oper at i ng
condi t i ons
.



System
control

challenges





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Ef f i ci ent

and
r el i abl e

HTPEM
f uel

cel l

syst ems
ar e

at a
devel opment

st age,
wher e

syst em desi gn and
cont r ol

ar e

i ncr easi ngl y

r el evant.



Fuel

cel l

syst ems
ar e

excel l ent
par t l oad per f or mer s, but l ag,
compl ex

syst ems
dynami cs

and
expensi ve

st at e

moni t or i ng

can

l i mi t l oad
f ol l owi ng

capabi l i t i es

and syst em per f or mance.



Conclusions




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The
aut hour s

woul d

l i ke

t o
gr at ef ul l y acknowl edge t he f i nanci al suppor t f r om
t he EUDP pr ogr am and t he Dani sh Ener gy A
gency

f or
sponsor i ng

t he
pr oj ect

:
COmmer ci al

BReakt hr ough

of Advanced
Fuel

Cel l s
-

(
COBRA)



Acknowledgements


12

Thank you