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Wisnu Hendradjit
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Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Engineering Industrial & Manufacturing Engineering

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Rekayasa Komputasional Sistem Pendingin Kluster Komputer Eko Mursito Budi; Wisnu Hendradjit; A C Budiman
Jurnal Otomasi Kontrol dan Instrumentasi Vol 2 No 2 (2010): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2010.2.2.4

Abstract

Makalah ini membeberkan proses rekayasa komputasional dalam rangka membangun sistem kluster komputer yang terdinginkan dengan baik. Pendinginan diperlukan karena seluruh komputer dimasukkan dalam satu lemari server secara kompak, padahal selama bekerja masing-masing komputer akan mendisipasikan kalor yang tidak sedikit. Upaya pendinginan dilakukan dengan mengatur peletakan komputer agar konveksi udara alami berjalan lancar, kemudian menambahkan kipas pada posisi yang tepat untuk memberi konveksi paksa yang efektif. Dengan rekayasa komputasional, maka peletakan komputer maupun kipas secara coba-coba bisa dihindari. Hasil simulasi maupun implementasi menunjukkan bahwa suhu udara dalam lemari bisa dijaga dibawah 79oC pada beban komputasi 100%. Kata kunci: rekayasa komputasional, pendinginan, konveksi udara, kluster komputerAbstractThis paper shows the process of computational engineering in order to build a well cooled computer cluster system. Cooling system is needed because many computers are put into single server cabinet, whereas each computer will dissipate some heat during the work. This cooling system works by arranging the computer position to maximize the natural air convection and adding the fan in the right position to give an effective forced convection. With computational engineering, the trial and error method for computer and fan placement can be avoided. Results from simulation and implementation show the air temperature in server cabinet can be maintained below 79oC at 100% computational load. Keywords: computational engineering, cooling, air convection, computer cluster.
Development of A Simulation Package of Natural Gas Liquefaction System Nur Shadrina Amalina; Thomas Milano Setiawan; Wisnu Hendradjit; Sutanto Hadisupadmo
Jurnal Otomasi Kontrol dan Instrumentasi Vol 9 No 1 (2017): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2017.9.1.1

Abstract

AbstractGas liquefaction employs refrigeration process to bring feed gas temperature down to enable it to condense. The refrigeration system for natural gas liquefaction consists of some components combined in several configurations. One of those systems is the reversed-Brayton and its modified cycles. A numerical program package was developed to model and analyze the process of natural gas liquefaction with maximum flow rate 31.7 kg/s. The package was set for the simple 1-stage reversed Brayton cycle and its modified cycle. The process was modelled with assumptions of a steady state condition and natural gas that made of 100% methane. Parameters and variables that may be involved in the simulation are the feed gas flow rate, temperature and pressure, the selection of refrigerants for the cycle, the refrigeration working pressures. The package enable one to calculate the amount of work required for liquefaction process as well as the system's performance in term of its figure of merit. 
Co-Authors A C Budiman Eko Mursito Budi Nur Shadrina Amalina Sutanto Hadisupadmo Thomas Milano Setiawan