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All Journal Archipelago Engineering
Gertruida S. Norimarna
Universitas Pattimura
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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PERILAKU CHAOS ALIRAN FLUIDA BERDENYUT DALAM SALURAN BERPENAMPANG SEGIEMPAT Prayitno Ciptoadi; Mesak F. Noya; Gertruida S. Norimarna
ALE Proceeding Vol 4 (2021): Archipelago Engineering (ALE)
Publisher : Fakultas Teknik Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ale.4.2021.104-111

Abstract

The pulsatile fluid flow in a transverse grooved channel would become chaotic flows in low Reynold numbers. The Reynold number where flows become chaos depends on grooves distances. The objective of this research is to analyze the effect of grooves distances on the behavior of chaos. This research was done by implementing a closed square cross-section channel, where the bottom surface of the channel was semicircle grooved. The frequency of flow oscillation measurement was done by setting up a resistance sensor that is Wheatstone bridge where the resistance sensor was located in a U manometer. Measurement was done at several Reynold number. From the research result, it is seen that the periodic fluid flows in the transverse grooved channel had become chaos at Reynold number Re 950 in the channel without grooved and at Reynold number Re 700 in the grooved channel. Chaos took placed since a vortex appeared at every treatment.
DESAIN EVAPORATOR SISTEM REFRIGERASI MEKANIK UNTUK KAPAL IKAN 3 GT Gertruida S. Norimarna; Prayitno Ciptoadi; Farel I. R. Sipahelut; Fany Laamena
ALE Proceeding Vol 5 (2022): Archipelago Engineering (ALE)
Publisher : Fakultas Teknik Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ale.5.2022.148-151

Abstract

Es balok sebagai salah satu media pendingin ikan sering digunakan oleh nelayan tradisional untuk menyimpan ikan di dalam palka, akan tetapi penggunaannya dinilai kurang efektif karena dapat menyebabkan kerugian bagi nelayan. Sehingga, harus dibuat sistem pendingin aktif sebagai pengganti es balok, salah satu bagian dari sistem pendingin aktif adalah evaporator. Penelitian ini bertujuan untuk mengetahui beban panas yang harus dienyahkan oleh evaporator serta mendesain evaporator untuk kapal ikan 3 GT. Penelitian ini dilakukan dengan metode observasi lapangan, wawancara, dan studi literature kemudian dilakukan pengolahan data dan analisis data. Dari hasil perhitungan panas yang harus dienyahkan oleh evaporator sebesar 6,410270319 kJ/hr, serta desain evaporator adalah sebagai berikut, diameter pipa evaporator sebesar 9,53mm, jenis pipa yaitu pipa tembaga jenis K, panjang keseluruhan pipa sebesar 21,70667314 m, tipe evaporator bare, serta sistim refrigrasi yang digunakan adalah sistim refrigerasi kering. COP yang didapat sebesar 90 %.
Co-Authors Fany Laamena Farel I. R. Sipahelut Mesak F. Noya Prayitno Ciptoadi