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All Journal REKAYASA Conference on Innovation and Application of Science and Technology (CIASTECH) Jurnal Sistem Teknik Industri
Rahdiana, Nana
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Agriculture, Biological Sciences & Forestry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Physics Social Sciences

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ANALISIS PENGARUH JARAK ANTAR SIRIP DAN LAJU ALIRAN TERHADAP KOEFISIEN PERPINDAHAN KALOR PADA ALAT PENUKAR KALOR PIPA GANDA Khoirudin, Khoirudin; Mulyadi, Dodi; Rahdiana, Nana
Conference on Innovation and Application of Science and Technology (CIASTECH) CIASTECH 2020 "Peranan Strategis Teknologi Dalam Kehidupan di Era New Normal"
Publisher : Universitas Widyagama Malang

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Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh jarak antar sirip, laju aliran dalam, dan laju aliran luar terhadap koefisien perpindahan kalor menyeluruh pada alat penukar kalor pipa ganda. Penelitian ini menggunakan dua pipa, yaitu pipa tembaga 1/2 inch yang dialiri air panas dan pipa alumunium 1 inch yang dialiri air dingin. Populasi yang digunakan dalam penelitian ini adalah pipa bersirip enam jarum dengan variasi jarak antar sirip 10 mm, 15 mm, dan 20 mm, variasi laju aliran dalam 0,06 lt/dt, 0,08 lt/dt, 0,1 lt/dt, dan laju aliran luar 0,07 lt/dt, 0,1 lt/dt, 0,13 lt/dt. Hasil penelitian menunjukan ada perbedaan nilai perpindahan kalor dari masing-masing variasi, antara variasi jarak antar sirip, laju lairan dalam, dan laju lairan luar. Koefisien perpindahan kalor paling rendah terjadi pada interaksi pipa tanpa sirip, laju aliran dalam 0,06 lt/dt, dan laju aliran luar 0,07 lt/dt, yaitu sebesar 890,74 W/m2ËšC. Sedangkan koefisien perpindahan kalor paling tinggi terjadi pada interaksi jarak antar sirip 15 mm, laju aliran dalam 0,1 lt/dt, dan laju aliran luar 0,13 lt/dt yaitu sebesar 1784,84 W/m2ËšC.
Pengukuran Beban Kerja Mental Bagian Marketing PT. Pindo Deli di Masa Covid-19 dengan Metode NASA TLX Rahdiana, Nana; Hakim, Afif; Sukarman
Jurnal Sistem Teknik Industri Vol. 23 No. 1 (2021): JSTI Volume 23 Number 1 January 2021
Publisher : TALENTA Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsti.v23i1.4873

Abstract

PT. Pindo Deli is a national company that produces paper, which is located in Kutamekar Village BTB6/9, Karawang Regency, West Java. It produces various types of paper with a market share of 60% for exports and 40% for domestic. The condition of the Covid-19 pandemic also has an impact on the marketing and sales of paper, namely a decrease in the number of requests from the export and domestic markets. This condition certainly has affected the marketing department because it is still determined to be able to sell paper to the market. Job as marketing tend to have a high risk of mental workload, because they are required to always involve the brain's performance in completing their work. The purpose of this study is to measure the level of mental workload in the marketing department at the manager level, namely the regional managers and product managers in meeting their job demands, especially during the Covid-19 pandemic. The method used to measure the mental workload of managers is NASA TLX method. From the research results, it is found that 42% of manager had a high level of mental workload and the remaining 58% were in the very high category.
Evaluasi Desain Bejana Bertekanan pada Radiator Cooling System Menggunakan Material SPCC-SD Sukarman, Sukarman; Khoirudin, Khoirudin; Murtalim, Murtalim; Mulyadi, Dodi; Rahdiana, Nana
Rekayasa Vol 14, No 1: April 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i1.9570

Abstract

This study discusses the analysis of a pressure vessel's design in the Radiator Cooling 1000 (RC-1000) system, which operates at a design temperature of 110oC. A pressure vessel is a container of gaseous, solid, or liquid material subjected to internal or external pressure and can withstand various other load variations. The pressure vessel on the RC-1000 system has a outer diameter of 87.8 mm or 3.46 inches and will experience an internal pressure of about 20.84 psi or 143.7 kPa, so it must be designed safely. This research method uses analytical and experimental methods. The analytical method is used to calculate the thickness of the pressure vessel material, the maximum allowable working pressure, and the hydrostatic test calculation. While the experimental method was carried out on the hydrostatic test process, the evaluation was based on the prevailing regulations in the Republic of Indonesia. Using the SPCC-SD material (JIS 3141), it was found that the minimum thickness of this pressure vessel is 0.0453 inches on the shell side and 0.0435 inches on the head/head side. The thickness of the material used on the shell side and head/head is 0.0472 inches in practice. This pressure vessel has passed the hydrostatic test at 232.1 psi or 1600 kPa.
Co-Authors Afif Hakim Amri Abdulah Dodi Mulyadi Khoirudin Khoirudin, Khoirudin Murtalim, Murtalim Shieddieque, Apang Djafar Sukarman Sukarman Sukarman