Electronic Theses and Dissertation

Daerah tropis memiliki karakteristik temperatur tinggi dan kelembaban signifikan sepanjang tahun, sehingga memerlukan sistem pendingin untuk kenyamanan termal. berdasarkan penelitian sebelumnya, efisiensi sistem pendingin maisotsenko menurun pada kondisi kelembaban tinggi, sementara sistem desiccant dinilai efektif untuk menurunkan kelembaban udara. penelitian ini merancang dan menguji sistem maisotsenko serta sistem desiccant dalam skala laboratorium untuk mengetahui pengaruh penambahan desiccant terhadap efisiensi pendinginan di iklim tropis dengan kelembaban tinggi. sistem maisotsenko dirancang dengan panjang saluran 180 mm, dan sistem desiccant 140 mm. pengujian dilakukan untuk dua konfigurasi sistem (tanpa dan dengan desiccant), dengan variasi kecepatan udara 5 m/s, 4 m/s, dan 3 m/s, serta rasio udara 0,5. hasil menunjukkan bahwa sistem tanpa desiccant memiliki performa terbaik pada kecepatan 3 m/s, dengan penurunan temperatur 1.7°c, laju perpindahan panas 1.4025 w, efisiensi dew point 27.5%, dan efisiensi wet-bulb 37.3%. sistem dengan desiccant juga menunjukkan hasil terbaik pada kecepatan 3 m/s dengan penurunan temperatur 2.0°c, efisiensi dew point 32.4%, dan efisiensi wet-bulb 43.8%, namun laju perpindahan panas tertinggi terjadi pada 5 m/s sebesar 1.9250 w. penambahan desiccant terbukti meningkatkan performa pendinginan, dengan peningkatan performa sebesar 366.7% pada 5 m/s, 78.9% pada 4 m/s, dan 17.6% pada 3 m/s.

ABSTRACT Tropical regions are characterized by consistently high temperatures and significant humidity throughout the year, creating a strong demand for cooling systems to ensure thermal comfort. Previous studies have shown that the performance of the Maisotsenko cooling cycle decreases in high-humidity environments, while desiccant systems are considered effective in reducing air moisture content. This study designed and tested both Maisotsenko and desiccant cooling systems at laboratory scale to evaluate the effect of integrating a desiccant system on cooling efficiency under humid tropical conditions. The Maisotsenko system was designed with a channel length of 180 mm, and the desiccant system with 140 mm. Two configurations were tested—Maisotsenko alone and Maisotsenko with a desiccant—under three air velocity variations: 5 m/s, 4 m/s, and 3 m/s, with an operating air ratio of 0.5. The results showed that the standalone Maisotsenko system performed best at 3 m/s, with a temperature drop of 1.7°C, heat transfer rate of 1.4025 W, dew point efficiency of 27.5%, and wet-bulb efficiency of 37.3%. With the addition of a desiccant, the best results also occurred at 3 m/s, showing improvements to a 2.0°C temperature drop, 32.4% dew point efficiency, and 43.8% wet-bulb efficiency, while the highest heat transfer rate of 1.9250 W occurred at 5 m/s. The integration of a desiccant system significantly enhanced cooling performance, with improvements of 366.7% at 5 m/s, 78.9% at 4 m/s, and 17.6% at 3 m/s.