Environmental Engineering Reference
In-Depth Information
Several prototypes for cooling building using porous ceramic materials as wetting media
in indirect evaporative cooling applications as this paper proposes, have been built in recent
years such as those by Ibrahim et al [5] or Riffat and Zhu [6] who also combined an indirect
evaporative cooler using porous ceramic as the cooling source and a heat pipe as the heat
transfer device.
The coolant material chosen yields low thermal resistance, high resistance to corrosion
and is also economical and offers high porosity. The geometric dimension and configuration
of the ceramic exchanger are shown in Table 1:
Table 1. Geometric dimensions of the evaporative cooler
Internal
diameter
(di)
External
diameter
(de)
Thicknes
s
(δ)
Pipe
Lengt
h
Section T
(S T )
Section L
(S L )
Section D
(S D )
Area
(Ao)
15*10 -3 m
25*10 -
3 m
5*10 -3 m
30*10 -3 m 25*10 -3 m 29,2*10 -3 m 0.6 m
2.3
m 2
Figure 4. Evaporative Cooler geometric configuration
Table 2.-Geometric configuration of the evaporative cooler
Number of
columns
Arrangement
Number of rows
Number of pipes
Material
Staggered
7
7
49
Ceramic
It is important to point out that this system allows water evaporation in the air supply, but
the ceramic material used has a pore diameter that prevents the exchange of harmful agents
through the porous structure, thus avoiding impulsed air contamination from the pollutants
carried by the return air. [7]
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