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All Journal Almikanika
Nuraini, Aisyah Iadha
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Education Engineering Industrial & Manufacturing Engineering

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RANCANG BANGUN 4 DOF (DEGREE OF FREEDOM) UNDERWATER REMOTELY OPERATED VEHICLE (ROV) Rachmansyah, Yoki; Rahmat, Mamat; Ahmad, Anton Royanto; Nuraini, Aisyah Iadha
ALMIKANIKA Vol 1 No 1 (2019): Januari
Publisher : UNIVERSITAS IBN KHALDUN BOGOR

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/almikanika.v1i1.2008

Abstract

In this research, the underwater robot designed is a type of mini Remotely Operated Vehicle (ROV) based on the Arduino Uno Atmega 328A microcontroller. This research was aimed to make a robot underwater or ROV and test its performance in water. This research was conducted to determine the system of tightness in the ROV by using a body that was used as a cover for each component in the ROV and tested its movement in the water. The design of mini ROVs is integrated in several design processes, namely planning the calculation of each component selection used by ROV, designing mechanical construction, designing electronic construction, and making integration of the entire design process. The results of this integration are in the form of a physical form of mini ROV, electronic systems, and graphical interface programs. The designed robot is an underwater robot that can move in water with the X, Y and Z axes. The ROV robot is made with a total dimension of 38 cm in length, 21 cm in width, and 22 cm in height. The body of the ROV is made using a base material from a PVC pipe that each gap is lined with a seal so that the ROV can be maintained properly. In the ROV movement system, use 2 propeller leaves to go forward and backward and 2 propeller leaves to drown or raise the ROV.
ANALISIS KINERJA ALAT PENUKAR KALOR TIPE SHELL AND TUBE ARAH ALIRAN CROSS FLOW UNTUK PEMBANGKIT LISTRIK TENAGA ORGANIC RANKINE CYCLE KAPASITAS 500 KW Jamaludin, Acep; Gaos, Yogi Sirodz; Nuraini, Aisyah Iadha
ALMIKANIKA Vol 3 No 4 (2021): Oktober
Publisher : UNIVERSITAS IBN KHALDUN BOGOR

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/almikanika.v3i4.2234

Abstract

Sumber energi panas bumi di Indonesia dapat dimanfaatkan untuk pembangkit listrik. Oleh karena itu dibuatlah siklus Organic Rankine Cycle (ORC) pada alat penukar kalor tipe shell and tube dengan aliran crossflow. Pada proses penukaran kalor akan dipelajari koefisien perpindahan panas menyeluruh, beda suhu rata-rata, dan NTU-Efektifitas dengan menggunakan metode LMTD (Logarithmic Mean Temperature Difference) dan  NTU (Number of  heat Transfer Unit). Dari hasil perhitungan dan analisis, perpindahan panas yang dihasilkan sebesar 335,22 kJ/s pada ?Th 2 0C, LMTD 9,64 0C, koefisien perpindahan panas 50,25 kW/m2 0C, dan NTU-efektivitas 2,8 dan 0,83 sehingga dapat disimpulkan semakin besar perbedaan suhu masuk dan keluar maka semakin besar juga perpindahan panas. LMTD dipengaruhi besar kecilnya faktor koreksi dan suhu masuk atau keluar pada shell and tube,oleh karena itu semakin besar LMTD yang dihasilkan. Untuk NTU-efektivitas, semakin kecil perbedaan antara qaktual dan qmaks, semakin besar nilai efektivitas yang dihasilkan. Hal ini berbeda dengan NTU yang mana semakin besar perbedaan antara efektivitas dan kapasitas (C) atau ?c.Cpc/ ?h.Cph maka semakin besar juga nilai NTU yang dihasilkan.
Co-Authors Anton Royanto Ahmad Jamaludin, Acep Mamat Rahmat Rachmansyah, Yoki Yogi Sirodz Gaos, Yogi Sirodz