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All Journal Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Jurnal Mesin Nusantara Jurnal Polimesin
Alamsyach, Rizky
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Convective Coefficient and Evaporative in Forced Flow Solar Still Oktavian, Akbar; Mugisidi, Dan; Alamsyach, Rizky; Heriyani, Oktarina
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa & Inovasi Volume 6 Nomor 2 Tahun 2024
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v6i2.6937

Abstract

The water crisis is a significant global problem, with more than 2 billion people lacking water and 1.1 billion having no access to clean water. Desalination, a method of converting seawater into fresh water by removing salt, is a potential solution to help coastal populations. This study aims to determine the convection and evaporation heat transfer coefficients and the effect of condenser cooling water temperature on the evaporation process and the increase in freshwater condensate. The research methodology involved the analysis of heat and mass transfer in a solar desalination system. A desalination device was designed to test the evaporation process with seawater temperature heated using halogen lamp light. Results show that increasing seawater temperature from 27°C to 42°C results in condensation when the temperature reaches about 30°C, affecting the water surface pressure and evaporation rate. Evaporation and condensation efficiencies are affected by convection and evaporation heat transfer, resulting in a convection heat transfer (0.84296 W/m2. °C) and evaporation heat transfer coefficient (23.81353 W/m2.°C). This research demonstrates the potential of solar desalination technology in producing clean water.
Laju Penguapan Pada Forced Flow Solar Still Alamsyach, Rizky; Mugisidi, Dan; Oktavian, Akbar; Heriyani, Oktarina
Jurnal Mesin Nusantara Vol 7 No 2 (2024): Jurnal Mesin Nusantara
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/jmn.v7i2.22887

Abstract

Air bersih semakin langka di seluruh dunia akibat polusi, perubahan iklim, dan pertumbuhan penduduk. Salah satu solusi adalah desalinasi air laut dengan metode solar still yang ramah lingkungan. Penelitian ini fokus pada forced flow solar still yang memanfaatkan aliran udara untuk meningkatkan laju penguapan dan produktivitas air tawar. Temperatur air mempengaruhi kinerja solar still; semakin tinggi temperatur air dan kecepatan aliran udara di dalam solar still, maka penguapannya juga akan meningkat. Penelitian ini bertujuan menentukan laju penguapan air laut dalam forced flow solar still. Perangkat desalinasi ini menggunakan kondensor dan pengukuran parameter seperti temperatur dan kecepatan aliran udara, dengan data penguapan dikumpulkan setiap 15 menit selama 2 hari. Hasil penelitian menunjukkan bahwa forced flow solar still efektif meningkatkan laju penguapan. Temuan ini dapat membantu meningkatkan efisiensi desalinasi menggunakan solar still dengan mempertimbangkan faktor iklim lokal. 
Effect of water pressure and temperature on the perform-ance of a desalination reactor Dwibowo, Dany Alvian; Mugisidi, Dan; Heriyani, Oktarina; Alamsyach, Rizky; Amin, Syahrul
Jurnal Polimesin Vol 23, No 6 (2025): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i6.7867

Abstract

The crisis of clean water availability has become increasingly critical due to rapid population growth and environmental degradation. One strategic approach to address this challenge is to implement seawater desalination, which provides an abundant, sustainable water source. However, conventional methods remain limited in terms of energy efficiency. This study aims to analyze the effect of pressure and temperature variations on the performance of a large-capacity desalination reactor with an 8000-liter tank. Two configurations were experimentally tested: (1) an air-circulation system that relies on static heating assisted by an axial fan to enhance convection, and (2) a sealed system operating under low-pressure conditions to reduce the boiling point of water, equipped with active hot-water circulation. Data collection was carried out over 27 hours of operation, with the observed parameters including water temperature, partial pressure, relative humidity, and evaporation volume. The experimental results showed that the sealed configuration delivered superior performance, with an evaporation rate 16.64% higher than that of the air-circulation variant. The volume of water successfully evaporated in the sealed system reached 20.12 liters, whereas in the air-circulation system it was only 17.25 liters. This increase in efficiency is attributed to the pressure-reduction effect, which enhances the vapor pressure difference while facilitating uniform heat distribution through active water circulation. This study emphasizes that controlling pressure and temperature is key to improving the effectiveness of the desalination process, thereby supporting the Development of more energy-efficient and sustainable clean water supply technologies.
Co-Authors Amin, Syahrul Dan Mugisidi Dwibowo, Dany Alvian Oktarina Heriyani Oktavian, Akbar