| Summary: | Energy consumption is increasing gradually every year. It is caused by the
growth of air conditioning need in response to higher summer temperature resulted
from climate changes. Consequently, this causes an increase in electricity demand.
Solar cooling is a relatively new, reliable and clean energy application of proven
refrigeration technology that able to improve comfort conditions. This technology
also limits the impact on the environment and conserves energy. The main element in
desiccant cooling system is the desiccator. In this study, single and two layer hollow
test bed were made. The adsorption ability of silica gels as the solid desiccant
materials also tested under varied inlet air velocity (1.0 m/s, 1.2m/s, 1.5 m/s, 2.15 m/s,
3.7m/s and 4.9 m/s. The result show that increase in inlet air velocity value cause
reduction in adsorption rate of the desiccant bed. This trend can be seen for both
single and double layer desiccant bed experiment. However, the experimental setup
requires a stable humidification capability for the adsorption experiment. Mist spray
method has been selected to be used in the humidity addition system. The
performance of 4 and 9 numbers of nozzles under vertical, parallel and counter flow
arrangement have been analysed for air velocity from 1 m/s to 6.2 m/s, relative
humidity between 59% and 78% and room temperature from 28.5 ˚C to 30.2 ˚C. The
data shows that the humidification effect is directly proportional to the number of
nozzle. The highest relative humidity is recorded at 88.4% in 9 numbers of nozzle use
under vertical flow. The performances of vertical and counter flow are further tested
with nozzle arrangement of 2, 4, 6 and 8. The data collected show that highest relative
produce was by 8 nozzles under vertical flow at 89.8%.
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