pres solar cooling
TRANSCRIPT
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Solar cooling
Solar coolingWimolsiri Pridasawas
Teclemariam Nemariam
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Solar cooling
Contents Introduction
Solar cooling path and local conditions
Performances
Refrigerants Heat-driven systems
Electricity-driven systems
Comparisons
Review from the ISES congress
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Solar cooling
Solar Cooling Paths
Solar Thermal
Collectors-Flat Plate
-Evacuated Tube-Concentrating 70C
Flat Plate
100C
150C
ETC
Concentrating
300C
heat
Dessicant cycle
Ejector cycle
Absorption
Rankine cycle
Adsorption
Chemical reaction
Thermo-electric cycle
Vapour compression
Stirling cycle
20C
0C
8C
15C
Freezing
Food,
Vaccine Storage
Air-conditioning
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Solar cooling
)( WQ
QCO
in
e
!
W
QCO eelec !
COP of the refrigeration sub-system
Thermal-driven system
Electricity-driven system
Performance
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Solar cooling
System Performance STR (System Thermal Ratio)?
SEE (System electrical efficiency)?
System efficiency??
)( Ws
esystem
!L
s
e
Q
QS R !
W
QSEE e!
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Solar cooling
Working fluids
Solar collector
sub-cycle
Refrigeration sub-
cycle
Generator
Evaporator
Condenser Ejector
Pump
Throttle
valve
Solar Collector
W
Qs
Qe
Qc
5
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Solar cooling
Refrigerants
1. Physical and thermodynamics characteristics
2. Environmental impact
3. Safety4. Economic and availability
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Solar cooling
Basic Refrigeration Cycle
Condenser
or tor
Compressor
xp.
device PV
electricity
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Solar cooling
Heat-driven systems
Absorption
E p valve
Condenser
Regulating
valve Pump
Heate changer
Solarcollector
Absorber
Generator
Evaporator
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Solar cooling
Heat-driven systems
Adsorption
or er
Condenser
vaporator
Qcs
or er
Condenser
vaporator
Desor ed
vapour
Refrigeration Regeneration
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Solar cooling
Heat-driven systems
Chemical reaction
Captor-adsorber generator
Condenser
Evaporator
Reservoir
gas
liquid
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Solar cooling
Heat-driven systems
Desiccant system
esiccant Wheel Heat E changer
Wheel
Humidifier
Humidifier
Heater
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Solar cooling
Heat-driven systems
Rankine
Electricityproduction
Exp.
device
Alternator
Compressor
Pump
Condenser
Boiler
Tur ine
Evaporator
Condenser
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Solar cooling
Heat-driven systems
Ejector
Generator
Evaporator
Condenser
Ejector
Pump
E p.
device
Solar Collector
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Solar cooling
PV-driven systems
Thermo-electric (Peltier)
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Solar cooling
PV-driven systems
Stirling
Heatexchanger HeatExchanger
Compression
piston Epansio
n
piston
E pansion
spaceCompression
space
Heat
source
Cold
sideHot
sideRegen
era
t
r
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Solar cooling
Sys te m s
P o w erfo r1W o f
refri ge ration
effec t
(W )
C O PW ork in g
F lu id sA p p lic a ti o n s Advan ta g e s D isadva ntag es
V ap or- c o m pres s io n
12-50 3-5R13 4a,
R290 ,
or etc .
Re frigeration
- H igh COP
- Lo n g te rm e p e r ience
and w id el c om m e rc ial
ava ilable
- Adjustable from a
small to a la rge s s tem
- Installation cost is h igh
and it re q u ires batter
fo r en er g b a ck up .
Th erm o -electr ic (P e ltier)
A few W 0.5 - Re frigeration
- No work ing flu id and
no mov ing parts
- u iet
- Sma ll s iz e and light
w e ight
- Low COP
- ifficult to ach ieve a low
re frigeration
temperature
- Low re liab ilit esp ec iall
when the power suppl
is cut.
S tirlin g
3-17 3He,
H2,
A ir
Re frigeration
- H igh COP for h igh
temperature d ifference
- Can be used forcr ogen ic applica tions
and it is mechan ical l
more s imple than other
application for low
temperature operation .
- Env ironmental friendl
work ing flu id
- Mob ilit and light
w e ight
- H igh production cost
- Comple it in des ign
P N PP N N
Heat absorb ing sur fac e
Heat rejecting sur fac e
Q1
Q2
t1
t2
PV
Hot s ide
Cold s ide
Condenser
Evaporator
Compressor
E
p.
de v ice PV
electric it
Hea texchanger Hea tExchanger
Compression
piston E
pans
ion
piston
E
pansion
spaceCompress ion
space
Heat
source
Cold
s ide
Ho t
s ideRegenerat
or
Re m ark : CO P is a coe ff ic ient o f performance o f the re frigeratio n su b- s s te m . I t shows how m uch heat can be removed from a cold reg ion for
each un it o f e ne rg u se d.
Photovo ltaic-driven systems
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Solar cooling
S y stem s
Gen. /
Regen.
emp.
(C )
COPW or
in g
F l i sApp lications A d vantages D isad vantages
A b sorption
8 0-1 900 .6 -0 .8
(s in g le st age)
1 .(2 st ag es )
N H /H2
O ,
H2
O /LiC l,
H2
O /L iBr
efrig eratio n
an d
Ai r-c onditio n
- O n ly on emoving pa rt
(pump)
it po ss ib ly no
moving pa rt fo ra sm a ll
system
- Lo w -temperature ea t
sup p ly is po ss ib le.
- Lo w C O P
- It cannot ac
ieve ave ry lowevaporating temperature.
- T e system is qui te
com p lica ted .
A d sorption
8 0-3 00 0 .3-0 .8
H2
O /Zeo lite, e t an o l/
Act iv a ted
carbo n
R efrig eratio n
- N omoving pa rt (exc ep t
va lve )
- Lo w op eratin g
temperature can be
ac ieved.
- T erm a l C OP is qui te
high compared toothe r
he a t op eratin g system .
- High weigh t an dpo or t he rm a l
conduct iv ity of the ad sorbe n t.
Fo rhigh cap ac ity system , it
can cau se lon g-term
prob lem s .
- Lo w op eratin g press urerequi rem en t m akes it difficu lt
to achieve ai r-t ig htne ss .
- Ve ry sen s itiv e to low
tem pe ra ture espe c ia lly the
de crea s in g tem pera ture
du rin g nigh tt im e.
- I t is an in term itten t system .
Desiccant
0-1 00 0 . -1 . w ater Ai r-c onditio n
- Env ironmenta lly
friend ly , w ater is used
as the w ork ing fluid.
- C an be in teg rated w ithave ntilatio nan d
he a tin g system .
- It cannot fu nct io nprop erly
in ahumid area .
- I t is no t ap prop ria tefo ran
area w he rew ater issc arc ity .
- R equi res main tenancedu e
tomoving pa rt in a ro tor
whee l.
Ejector
8 0-1 50 0 .3-0 .8
W a ter,
bu tan e,
R 14 1b,
R 245 fa ,
oretc .
Ai r-c onditio n
- Lo w temperature he at
sou rc e can be used .
- Lo w op eratin gan d
inst a llation cost .
-Lo w C O P
o rbe r
C o n d e n se r
Eva p o ra to r
Qcs
o rbe r
C o n d e n s e r
Eva p o ra to r
D eso rbe d
va p o u r
Refrigerat ion R egeneration
D es icc an t W he e l He a t Exc h a n g e r
W he e l
H u m id if ier
H u m id if ier
He a te r
en e ra to r
Eva p o ra to r
C o n d e n se r
Ej ect o r
P u m p
Ex p.
d e vic e
So la r Co ll ect o r
So l r t r l- ri t
Ex p va lve
C o n d e n s e r
R e g u la t ing
va lve P u m p
He a texc h a n g e r
Solarcollector
Ab s o rbe r
en e ra to r
Eva p o ra to r
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8/9/2019 Pres Solar Cooling
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Solar cooling
Review from ISES Solar assisted air-conditioning of buildings an
overview
Hans-Martin Henning and Edo Wiemken
Desiccant cooling technology powered by solar thermalair collector systems
Ursula Eicker, Martin Huber, Uwe Schurger, JurgenSchumacher, Andreas Trinkle
Prototype for a novel solar powered ejector air-conditioning system in Mazunte, Mexico
J.L. Wolpert, S.B. Riffat and S. Redshaw
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8/9/2019 Pres Solar Cooling
20/21
Solar cooling
Development of an Optimised solar deriven Diffusion-absorption cooling machine
Uli Jakob, Ursula Eicker, Ahmed H. Taki, Malcon J. Cook.
Project Description Solar cooling system in Pristina/Kosovo
Ernst MeiBner and Christian Holter
Solar assisted Cooling of the New Federal EnvironmentAgency Building in Dessau
Edo Weimken and Hans-Martin Henning Evaluation of a Zeolite-water Solar adsorption Refrigerator
Miguel Ramos, Rafael L. Espinoza, Manfred J. Horn, AntonioPralon, Ferreira Leite
Thermo chemical Accumulator - TCAFrederik Setterwall, Chris Bales, Gran Bolin
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Solar cooling
T
hank you.