A special test setup is designed to evaluate the performance of three natural fibers to be used as wetted
pads in evaporative cooling. The chosen fibers are date palm fibers (stem), jute and luffa. As a reference, a
widely used commercial wetted pad is chosen. The performance criteria include cooling efficiency, material
performance and cooling efficiency degradation. The results show that the average cooling efficiency is
highest for jute at 62.1%, compared to 55.1% for luffa fibers, 49.9% for the reference commercial pad and
38.9% for date palm fiber. Material performance tests comprise salt deposition and bio-degradation (mold
forming). Jute has the least salt deposition followed by palm and luffa fibers. The commercial type has the
highest salt deposits. The highest resistance to mold forming is offered by luffa followed by palm fibers. The
commercial type and jute have very poor performance. The results of the cooling efficiency degradation
indicate that luffa has an overall advantage over the other fibers. Palm fibers and the commercial type have
a significant reduction in the cooling efficiency, while jute has the highest deterioration. The total results
indicate that luffa has an overall advantage over the other fibers. However, if the jute surface can be treated
to offer higher mold resistance characteristics, it would provide the best alternative. 2002 Elsevier
Science Ltd. All rights reserved
A special test setup is designed to evaluate the performance of three natural fibers to be used as wetted
pads in evaporative cooling. The chosen fibers are date palm fibers (stem), jute and luffa. As a reference, a
widely used commercial wetted pad is chosen. The performance criteria include cooling efficiency, material
performance and cooling efficiency degradation. The results show that the average cooling efficiency is
highest for jute at 62.1%, compared to 55.1% for luffa fibers, 49.9% for the reference commercial pad and
38.9% for date palm fiber. Material performance tests comprise salt deposition and bio-degradation (mold
forming). Jute has the least salt deposition followed by palm and luffa fibers. The commercial type has the
highest salt deposits. The highest resistance to mold forming is offered by luffa followed by palm fibers. The
commercial type and jute have very poor performance. The results of the cooling efficiency degradation
indicate that luffa has an overall advantage over the other fibers. Palm fibers and the commercial type have
a significant reduction in the cooling efficiency, while jute has the highest deterioration. The total results
indicate that luffa has an overall advantage over the other fibers. However, if the jute surface can be treated
to offer higher mold resistance characteristics, it would provide the best alternative. 2002 Elsevier
Science Ltd. All rights reserved
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