STUDI LAJU EVAPORASI PADA DIRECT EVAPORATIVE COOLING BERBAHAN PAD JERAMI PADI DAN TAPIS KELAPA. Penggunaan sistim pendingin yang berbasis kompresor telah terbukti dapat menyebabkan peningkatan penggunaan energi bahan bakar fosil, dan juga dapat meningkatkan kerusakan lingkungan. Sistim pendingin evaporative banyak dikembangkan sebagai sistim pendingin alternative pengganti sistim pendingin berbasis kompresor. Dalam penelitian direct evaporative cooling ini akan dipelajari laju evaporasi yang terjadi pada cooling pad yang berbahan jerami  padi dan tapis kelapa. Penelitian dilakukan dengan tiga variasi kecepatan putar fan 1440, 1470 dan 1500 rpm, dengan dua material pad yang berbeda jerami padi dan tapis kelapa, dan dengan waktu pengujian selama 60 menit dengan pencatatan data setiap selang 15 menit. Dari penelitian ditemukan bahwa laju evaporasi tertinggi terjadi pada kecepatan putar rendah 1440 rpm sebesar 0.00157 liter/menit dan 0.00293 liter/menit masing-masing untuk jerami padi dan tapis kelapa. Sebagai kesimpulan dapat dinyatakan bahwa tapis kelapa menghasilkan laju evaporasi yang  lebih tinggi dibandingkan dengan jerami padi pada kecepatan putar rendah yang sama.

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The high energy consumption of compressor-based cooling system has prompted the researchers to study and develop non-compressor-based cooling system that less energy consumption, less environment damaging but still has high enough cooling performances. Indirect and semi indirect evaporative cooling system is the feasible non-compressor-based cooling systems that can reach the cooling performance required. These two evaporative cooling systems has some different in construction, porous material used, airflow scheme and secondary air-cooling method used for various applications. This paper would report the cooling performances achieved by those two-cooling systems in terms of cooling efficiency, cooling capacity, wet bulb effectiveness, dew point effectiveness, and temperature drop. Porous material used in indirect and semi-indirect evaporative cooling would be highlighted in terms of their type, size, thickness and any other feature. The introduction of nanopore skinless bamboo potency as a new porous material for either indirect or semi-indirect evaporative cooling would be described. In the future study of nanopore skinless bamboo, a surface morphology and several hygrothermal test including sorption, water vapor transmission, thermal conductivity test would be applied, before it utilizes as a new porous material for direct or semi indirect evaporative cooling.

The high energy consumption of compressor based cooling system has prompted the researchers to study and develop non-compressor based cooling system that less energy consumption, less environment damaging but still has high enough cooling performances. Indirect and semi indirect evaporative cooling system is the feasible non-compressor based cooling systems that can reach the cooling performance required. This two evaporative cooling system has some different in construction, porous material used, airflow scheme and secondary air cooling method used for various applications. This paper would report the cooling performances achieved by those two cooling system in terms of cooling efficiency, cooling capacity, wet bulb effectiveness, dew point effectiveness, and temperature drop. Porous material used in indirect and semi-indirect evaporative cooling would be highlighted in terms of their type, size, thickness and any other feature. The introduction of nanopore skinless bamboo potency as a new porous material for either indirect or semi-indirect evaporative cooling would be described. In the future study of nanopore skinless bamboo, a surface morphology and several hygrothermal test including sorption, water vapor transmission, thermal conductivity test would be applied, before it utilize as a new porous material for direct or semi indirect evaporative cooling.