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All Journal ROTOR: JURNAL ILMIAH TEKNIK MESIN JURNAL CRANKSHAFT Abdimas Universal Jurnal Mekanik Terapan Jurnal Abadimas Gorontalo ARMATUR : Artikel Teknik Mesin dan Manufaktur Sibatik Journal : Jurnal Ilmiah Bidang Sosial, Ekonomi, Budaya, Teknologi, Dan Pendidikan Jurnal Pengabdian Masyarakat Aufa (JPMA) Industrial Research Workshop and National Seminar AMMA : Jurnal Pengabdian Masyarakat
Yongki Christandi Batubara
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Pelatihan Penanganan Pascapanen Rumput Laut (Eucheuma cottonii) Kepada Gabungan Kelompok Tani Sumber Laut Berjaya Manggar-Kalimantan Timur Arista, Yuvita Lira; Amalia Nur Kumalaningrum; Yongki Christandi Batubara
Jurnal Pengabdian Masyarakat Aufa (JPMA) Vol. 7 No. 3 (2025): Vol. 7 No 3 Desember 2025
Publisher : Universitas Aufa Royhan Di Kota Padangsidipuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51933/jpma.v7i3.2162

Abstract

Gabungan Kelompok Tani (GAPOKTAN) Sumber Laut mengembangkan rumput laut varietas Eucheuma cottonii yang dikenal mempunyai kandungan nutrisi kompleks dan senyawa bioaktif. GAPOKTAN Sumber Laut Berjaya dapat menghasilkan hingga 1 ton rumput laut basah per panen. Namun, tingginya produktivitas tidak diimbangi dengan tinggi permintaan pasar. Rumput laut yang belum terjual terpaksa disimpan terlebih dahulu. Namun, penyimpanannya masih terbatas, hanya menggunakan plastik dan karung yang diletakkan langsung di lantai tanpa sekat atau alas. Kemunduran rumput laut selama penyimpanan pada umumnya disebabkan karena masyarakat belum menerapkan teknik pascapanen yang tepat karena terbatasnya peralatan dan minimya pengetahuan. Oleh sebab itu perlu adanya upaya peningkatan pengetahuan terkait penanganan pascapanen rumput laut kepada Kelompok Tani Sumber Laut Berjaya melalui kegiatan pendampingan dan pelatihan. Kegiatan diawali dengan sosialisasi penanganan pascapananen dan dilanjutkan dengan pendampingan. Pelatihan penanganan pascapanen dapat membantu mitra dalam menentukan teknik pascapanen yang tepat sehingga dapat mengurangi penurunan mutu rumput laut selama penyimpanan yang akan berdampak pada penurunan nilai ekonomi dan kandungan nutrisi, serta berpotensi menyumbang food loss dan food waste.Kegiatan PkM dinyatakan berhasil karena keseluruhan peserta dapat memperoleh nilai evaluasi diatas nilai 60.
KAJI SIMULASI VARIASI KECEPATAN INLET AIR PADA MICROBUBBLE GENERATOR TIPE ALIRAN SWIRL DENGAN BAFFLE OUTLET Batubara, Yongki; Surya Rahmany, Rijal; Ivan Wiyarta Cakra Sujana, I Made
SIBATIK JOURNAL: Jurnal Ilmiah Bidang Sosial, Ekonomi, Budaya, Teknologi, Dan Pendidikan Vol. 5 No. 3 (2026)
Publisher : Penerbit Lafadz Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/sibatik.v5i3.4515

Abstract

The need to improve water quality in the aquaculture and wastewater treatment sectors has driven the development of more efficient aeration technologies. Conventional aerators generally produce large bubbles, resulting in relatively short air-water contact times and low oxygen transfer efficiency. Microbubble generators (MBG) are one solution to this problem because they can produce micro-sized bubbles with a large specific surface area and low-rise velocity. Simulations were performed using the computational fluid dynamics (CFD) method with the Eulerian approach and the k–ε standard turbulence model. The water inlet velocity was varied from 11 to 15 m/s, while the air inlet pressure was set at atmospheric pressure. The simulation results showed that the swirl flow pattern inside the chamber was able to significantly reduce the pressure around the gas nozzle tip. Negative pressure began to form at an inlet water velocity of 13 m/s with a minimum pressure value of −14.05 kPa and decreased further to −50.9 kPa at a velocity of 15 m/s. These results indicate that an increase in swirl flow velocity directly affects the MBG's ability to generate negative pressure and automatically suck in air. The findings of this study can be used as a basis for the design and selection of suitable pumps for swirl-type microbubble generator applications.
Analisis pengaruh koefisien konveksi media pendingin terhadap temperatur panel surya dengan perendaman sebagian (Partially Submerged Photovoltaic) Rijal Surya Rahmany; I Made Ivan Wiyarta Cakra Sujana; Yongki Christandi Batubara
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 1 (2026): Jurnal Armatur
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i1.10902

Abstract

One of the main challenges in PV system deployment is the increase in panel operating temperature, which leads to a reduction in energy conversion efficiency, particularly in tropical regions with high solar irradiance. Potential solution to mitigate this issue is the partially submerged photovoltaic (PSPV) system. This study aims to analyze the influence of convective heat transfer coefficients on the surface of a PSPV system on the operating temperature of photovoltaic panels using a numerical modeling approach. The research methodology involves the development of an energy balance model that accounts for the contributions of solar radiation, convective heat transfer, and thermal radiation. The panel area is divided into two equal sections with a 50:50 ratio, consisting of a submerged portion and an air-exposed portion. The convective heat transfer coefficients for the submerged section are set to 100 W/m²K for both the upper and lower surfaces. For the air-exposed section, the upper surface convective heat transfer coefficient is varied between 10 and 70 W/m²K, while the lower surface coefficient is maintained at 10 W/m²K. Simulation results indicate that the presence of water as a cooling medium significantly reduces the panel operating temperature to approximately 31 °C, compared to a fully air-exposed panel configuration, which reaches an operating temperature up to around 55 °C.
Co-Authors Al Wafi, Rifqi ALDO, JEFRI Alfandy, Alev Putra Amalia Nur Kumalaningrum Amba Matarru, Andre Arista, Yuvita Lira Attila, Muhammad Rayes Deendarlianto Devy Setiorini Sa’adiyah Djafar, Alfian Drajat Indah Mawarni Gad Gunawan Haliq, Ridwan Hariz Dedy Sayogi, Muhammad Haryono, Hadhimas Dwi Hasiholan Lumban Tobing, Kevin Hendi Prasetya, Bagas Hendrik Vicarlo Saragih Hidayat, Dinda Khoirunnisa I Made Ivan Wiyarta Cakra Sujana Indarto - Ivan Christofel Hutabarat, Frans Julian, Lindra Rahmad Rizqi Kholiq Deliasgarin Radyantho Kumalaningrum, Amalia Nur Linda Mahmudi Syahlie, Razif Manta, Faisal Margyanto, Ageng Marshantya, Defiana Michael Alexander Hutabarat Mungil Kurniawati, Diniar Parsaulian Lobo Silalahi, Yonathan Qalbi AM, Chaerul Rajagukguk, Grendy Ary Krishna Rijal Surya Rahmany Saputra, Ferry Adi Stofani, Dhio Suanggana, Doddy Suisman, Kelvin Febriano Wiranata Sujana, I Made Ivan Wiyarta Cakra Syaharani, Destyana Putri Yasin, Hamzah Ibnu Yuike, Ariesta Yuvita Lira Vesti Arista Zufadli, Muhammad Syahmi