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Capillary assisted low pressure combined evaporator and condenser
Reza Abadi1 and Majid Bahrami2
Laboratory for Alternative Energy Conversion (LAEC), Mechatronic Systems Engineering,
Simon Fraser University
Surface Properties; Hydrophobic vs hydrophilic
Capillary assisted low pressure evaporator
Surface properties characterization
Optimization
www.sfu.ca/~mbahrami
Analytical modeling
Combined evaporator and condenser
Porous copper coated evaporator and condenser
Combined evaporator and condenser to reduce the cost
Combined evaporator and
condenser
Monitoring System
Temperature Control Systems
Liquid axial flow, pool boiling, 2D bulk heat transfer, thin film
evaporation, and non-evaporating region
0.00
0.50
1.00
1.50
2.00
2.50
0.00E+00 2.00E-06 4.00E-06 6.00E-06 8.00E-06
q (
W/m
)
z (m)
integrated heat transfer rate along the meniscus
0
1
2
3
4
0.00E+00 2.00E-06 4.00E-06 6.00E-06 8.00E-06
hlo
ca
l[W
/m2K
]x 1
00000
z [m]
local heat transfer coeff
Analytical modeling
Optimal design manufacturing
Spray coated low pressure capillary evaporator was
successfully tested as a condenser
Optimization based on heat exchanger geometry lead
to power density improvement
An optimized combined evaporator and condenser
can be 3D printed
0
500
1000
1500
2000
Co
olin
g p
ow
er (
W)
84%
State of the art Optimized evaporator
Genetic algorithm was used for optimization
6 geometry parameters were considered as variables
A 84% increase in cooling capacity can be achieved
by using optimized design points
1 [email protected] 2 [email protected]
He
at tr
an
sfe
r ra
te (
W)
He
at tr
an
sfe
r ra
te (
W)
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