| A
STUDY AND EVALUATION OF ADIABATIC SATURATION
PROCESS |
|
CHAPTER
V
RESULTS
AND DISCUSSIONS
|
The
performance of the adiabatic saturator was
studied and evaluated. Results and data were
gathered and recorded after a series of
preliminary testing basing on the procedures
that were presented in the earlier
chapter.
Air
that enters the saturator being the unsaturated
air becomes saturated as it passes the
re-circulated water and this process is believed
to be adiabatic process. The saturated air
having a lower temperature compared to the
unsaturated air because it is said that when air
is passed through the re-circulating water spray
as shown in Figure 5 & 7 the adiabatic
process reduces the air temperature and will
pick up moisture causing it to fall in
temperature.
Figure
6 shows the adiabatic saturation process as
water is sprayed, recycled and collected in the
basin. A continuous flow of recycled water was
evaluated for 5 days and at least 5 hours each
day. Data such as the ambient temperature
(unsaturated air), water temperature (wet bulb
temperature) and the exhaust temperature
(saturated air) are gathered and recorded every
hour. Results were each compared to determine if
a change or adiabatic cooling is achieved.
The
water spray shown in Figure 7 saturates the air.
Some time after starting the equipment, when
equilibrium exists, the water leaves the chamber
at the same temperature at which it enters. The
temperature of the water in the adiabatic
saturator is the same as to temperature of the
droplet of water and of the wet bulb thermometer
when the thermometer is in contact with a stream
of air.
Figure
5. Plastic water pipe used to spray
re-cycled water.
Figure
6. Adiabatic Saturator without cover.
Figure
7. Adiabatic Saturator with cover.
5.1
Discussions and Results
On
the first day that we have tested the adiabatic
saturator we turned the power on for the water
pump and the re-circulated water was sprayed.
The fan was turned on then it started to suck
and collect saturated air that passed through
the water spray. During the first hour of our
experiment, the reading was 26.67 °C
ambient temperature, 26.11 °C
for the water temperature, which is the wet bulb
temperature and the exhaust air, had the
temperature of 26.48 °C
is our saturated air. For five hours the ambient
temperature remained constant while the wet bulb
temperature ranges from 26.11 °C
to 23.9 °C
and the exhaust temperature having a reading
from 26.48 °C
to 25 °C
which is showed in Graph 1 or Table 1.
On the second day, same process was done
and this time with an ambient temperature of 28 °C
which remained constant for 5 hours. Graph 2 or
Table 2shows the falling of temperature as water
was continuously sprayed in hours. There’s
almost a point were the water temperature is
almost identical as the exhaust temperature with
very little difference during the first two
hours. As the process was continued it shows
that exhaust temperature was dropping and making
it more cooler comparing to the ambient
temperature.
During the third day of our evaluation of
the adiabatic saturator with the ambient
temperature at 27 °C
that remained the same for the next 5 hours with
a reduction of 1.6 °C
in temperature. Graph 3 or Table 3 shows that
wet bulb temperature is always lower compared to
exhaust temperature. As the re-circulated water
continuously sprayed there is also a continuous
falling of the temperature in the wet bulb
temperature and exhaust temperature.
Fourth day of evaluation with a starting
ambient temperature of 27.79 °C
and an increased to 28 °C
during the next hour which stayed the same for
the next 4 hours. A falling of temperature from
27.5 °C
to 25 °C
was achieved during 5 hours of observation.
Graph 4 or Table 4revealed that there is little
difference between the wet bulb and exhaust
temperature but never with of the same reading
because as mentioned in earlier chapters, the
wet bulb temperature has always the lowest
temperature.
During
our last evaluation of the adiabatic saturator
with a starting ambient temperature of 30 °C
that remained the same during the next 5 hours
had an exhaust temperature reduction from 28.5 °C
to 26.5 °C,
with a total reduction of 2 °C.
Graph 5 or Table 5 shows that even though the
ambient temperature remained the same but there
was still a continuous falling of temperature as
the re-circulated water was continuously
spraying.
Five days of evaluating, gathering, and
recording data we have concluded that adiabatic
saturation can achieve adiabatic cooling. Thus
adiabatic saturator can provide comfort cooling.
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