Article Per Year (5 Year)
p-Index From 2020 - 2025
0.444
P-Index
This Author published in this journals
All Journal Archipelago Engineering
Prayitno Ciptoadi
Universitas Pattimura
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation

Published : 4 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 4 Documents
Search

 1 
PENGARUH VARIASI DIAMETER PIPA ISAP TERHADAP KARAKTERISTIK POMPA SENTRIFUGAL Prayitno Ciptoadi
ALE Proceeding Vol 2 (2019): Archipelago Engineering (ALE)
Publisher : Fakultas Teknik Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ale.2.2019.83-86

Abstract

Penelitian ini bertujuan mengetahui pengaruh variasi diameter ipa isap terhadap karakteristik pompa sentrifugal.Penelitian dilakukan terhadap pompa sentrifugal merk SHIMIZU PS – 128 BIT dengan daya input 125 Watt.Diameter pipa isap yang digunakan berukuran ½, ¾, dan 1 inci sedangkan diameter pipa tekan yang digunakanberukuran ¾ inci. Pada pipa tekan ditempatkan sebuah katup cekik (throttle valve) yang diatur bukaannya untukmengatur kapasitas air yang dipompa sehingga karakteristik pompa sentrifugal dapat dihitung berdasarkan besaranbesaranyang diukur. Hasil penelitian menunjukan bahwa diameter pipa isap berpengaruh terhadap karakteristik pompasentrifugal yang secara umum ditunjukan oleh nilai efisiensi pompa. Efisiensi poma tertinggi sebesar 0,79 dicapaipompa dengan diameter pipa isap 1 inch diikuti berturut-turut oleh pompa dengan diameter pipa isap ¾ inci dan ½ inciyakni 0,66 dan 0,21.
PENGARUH JARAK ALUR TERHADAP KESTABILAN ALIRAN FLUIDA BERDENYUT DALAM SALURAN BERPENAMPANG SEGIEMPAT Prayitno Ciptoadi
ALE Proceeding Vol 1 (2018): Archipelago Engineering (ALE)
Publisher : Fakultas Teknik Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ale.1.2018.74-79

Abstract

The pulsatile fluid flow in a transverse grooved channel would become self-sustained oscillatory flow at a certain critical Reynold number. The critical Reynold number where laminar unsteady flow changed to unsteady transitional one depends on grooves distances. The objective of this research is to analyze the effect of grooves distances toward the vortex strength and the stability of the fluid flow. 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 manometer and measurement was done at several Reynold numbers. From the research result, it is seen that the largest vortex strength occurs at the smallest groove distance. The flows become instability in all of the grooves distances by seen Phase Plane.
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 Gertruida S. Norimarna Mesak F. Noya