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All Journal Infotekmesin Prosiding Seminar Nasional Teknik Mesin MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Jurnal Mekanik Terapan Mitra Akademia: Jurnal Pengabdian Masyarakat JURNAL POLI-TEKNOLOGI
Candra Damis Widiawaty, Candra Damis
Politeknik Negeri Jakarta
Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation

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Journal : JURNAL POLI-TEKNOLOGI

 1 
VISUALISASI TERMAL ALAT PENUKAR KALOR SHELL AND TUBE Hamdi Hamdi; Candra Damis Widiawaty; Rosidi; Bahar udin; Haolia Rahman
Jurnal Poli-Teknologi Vol. 22 No. 1 (2023)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v22i1.5329

Abstract

Pada umumnya fenomena termal pada sistem alat penukar kalor tipe shell and tube dievaluasi menggunakan simulasi atau studi numerik. Padahal, karakteristik dari fenomena perpindahan panas konveksi-konduksi pada bagian dalam penukar kalor tipe shell and tube perlu divisualisasikan untuk menggambarkan fenomena sesungguhnya yang terjadi didalam strukturnya. Pada penelitian ini, visualisasi dari alat penukar kalor shell and tube dilakukan secara eksperimental. Alat penukar kalor shell and tube dipotong melintang untuk mengetahui profil distribusi termal melalui photothermal. Profil temperature hasil photothermal dibandingkan dengan hasil studi numerik. Perbedaan antara temperatur masuk shell dan masuk tube diset sebesar 30oC. Hasilnya menunjukan bahwa distribusi panas pada prototipe dan studi numerik mempunyai profil identik. Pengukuran perbedaan temperatur logaritmik menunjukan hasil antara studi eksperimental dan studi numerik memiliki selisih yang tidak signifikan. Keywords: Thermal Visualisation, Shell and Tube, Heat Exchanger, Numerical Study
KAJIAN ANALISIS ENGINEERING DENGAN METODE COMPUTATIONAL FLUID DYNAMICS Candra Damis Widiawaty; Ahmad Indra Siswantara; Gun Gun R Gunadi
Jurnal Poli-Teknologi Vol. 14 No. 3 (2015)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v14i3.763

Abstract

ABSTRACT Computational fluid dynamic is fluid flow analysis in spesific system by mean of computer based simulation. The use of CFD to predict fluid flow in characteristic system which has specified conditions. The purpose of this research is to describe the procedural of simulation. The scope of this research is to verify the calculation result with the simulation result. The method of this research are iteratif calculaation and simulation. The result of iteratif calculation water outlet temperatur is of 71,88oC, while the simulation result for S1 is of 62,58 oC, S2 is of 79,44 oC, S3 is of 71,02oC, and S4 is of 71,68 oC. The difference of the result cause by the dimension of diameter tube, type of flow, and distribution of grid. The result of this research show that the accuration of simulation is depend on the intial engineering thingking, grid, and fluid flow specification. Key words: CFD, fluid, grid, simulation ABSTRAK Computational Fluid Dynamics (CFD) adalah pemanfaatan komputer untuk menghasilkan informasi tentang bagaimana fluida mengalir pada kondisi tertentu. CFD digunakan untuk membuat prediksi aliran fluida di dalam suatu sistem tertentu pada suatu kondisi yang ditentukan. Penelitian ini bertujuan mendeskripsikan langkah simulasi yang tepat. Lingkup penelitian ini adalah membandingkan hasil kalkulasi dengan hasil simulasi. Metode penelitian ini adalah kalkulasi iteratif dan simulasi. Hasil kalkulasi adalah temperatur keluaran air sebesar 71,88oC sedangkan dengan simulasi sebagai berikut parameter S1 sebesar 62,58 oC, S2 sebesar 79,44 oC, S3 sebesar 71,02oC, dan S4 sebesar 71,68 oC. Berbedaan hasil simulasi berurut-urut disebabkan oleh diameter tube, perbedaan tipe aliran, dan perbedaan distribusi grid. Hasil penelitian ini menunjukkan bahwa perancangan dengan software CFD sangat dipengaruhi oleh pemahaman pengguna terhadap sistem yang akan disimulasikan, pembangkitan grid/mesh, dan spesifikasi aliran. Kata kunci: CFD, fluida, grid, simulasi
PEMODELAN DAN ANALISIS KINERJA SHELL AND TUBE HEAT EXCHANGER DENGAN METODE CFD Candra Damis Widiawaty; Gun Gun Ramdlan Gunadi; Adi Syuriadi
Jurnal Poli-Teknologi Vol. 16 No. 3 (2017)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v16i3.979

Abstract

ABSTRACTOne of the problem that faces by local heat exchanger manufactur is testing the heat performance test, because of customized product and facilities. It could be solved by CFD Method.The purpose of this study is to describe the actual prosedure to simulate and analysis thermofluid ini shell and tube system. The procesure of this research are survey, calculating the heat performance test based on general concept of heat transfer, and verify the simulation result.The CFD method results the temperatur of water inlet is 30 oC, water outlet 31 oC, oil inlet 55 oC, and oli outlet 53 oC. The manual calculation based on Kern method results the temperatur of water inlet is 30 oC, water outlet 31 oC, oil inlet 55 oC, and oli outlet 52 oC.Keywords: Shell and tube heat exchanger,CFD , Kern MethodABSTRAKSalah satu kendala manufaktur lokal heat exchanger (HE) adalah tidak dapat melakukan performance test perpindahan panas, karena keterbatasan fasilitas. Kendala ini dapat diatasi dengan metode CFD.Penelitian ini bertujuan untuk memberikan solusi simulasi dan analisis termofluida pada sistem shell and tube heat exchanger (STHE). Metode penelitian yang digunakan adalah simulasi berbasis CFD. Proses penelitian dimulai dari pengambilan data di manufaktur lokal STHE, perhitungan kinerja berdasarkan persamaan umum perpindahan panas, simulasi dan analisis kinerja STHE.Perhitungan simulasi menunjukkan temperatur di inlet air sebesar 30oC, temperatur outlet air sebesar 31oC, temperatur inlet oli 55 oC dan temperatur outlet oli 53 oC. Perhitungan metode Kern menghasilkan temperatur di inlet air sebesar 30oC, temperatur outlet air sebesar 31oC, temperatur inlet oli 55 oC dan temperatur outlet oli 52 oC.Kata Kunci : Shell and tube heat exchanger,CFD , metode Kern
MODIFIKASI BUCKET ELEVATOR 536 PADA PT X Candra Damis Widiawaty; Averoes Syahputra Agil; Bayu Chandra Hangesthi
Jurnal Poli-Teknologi Vol. 18 No. 3 (2019)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v18i3.2393

Abstract

In the production process at PT X, such as casting process, required raw material in the form of casting sand. The sand transport process is done by a machine called a Bucket Elevator. The current condition of Bucket Elevator at Plant 2 PT X had some problems on its design due to the initial modification process to the machine that were deliberately done in order to ease the process of troubleshooting and repair on the machine to adjust the height of the drum shaft supported by the bearing, however, the modification causes a sand leak that impacted the lifetime of the bearing. The damage that occurs to the bearing of the Bucket Elevator can slow the production process at PT X down, which lasts between 120 hours to 134 hours per week. Therefore, it is necessary to modify the design of the Bucket Elevator machine in order to stop the sand leakage and be able to work optimally. The design modifications made, are changes to the shaft height adjusting mechanism of the Bucket Elevator 536 drum machine by providing a lock to minimize the leakage of sand that occurs and replace the bearing type to the type that is equipped with a seal to prevent the entry of sand into the bearings. The result of this modification can extend the lifetime bearing, thereby reducing production costs due to bearing replacement, and easing the troubleshooting and repairing process of the engine to adjust the height of the drum shaft supported by the bearings.
Co-Authors Abadi, Cecep Slamet Abi Tonjo Buono Adi Syuriadi Adi Syuriadi Adi Syuriadi Agustiant, Muhammad Brahmana Ahmad Indra Siswantara Akhmad Fauzi Ali, Jauhari Ali, Jauhari Auliya, Nurul Averoes Syahputra Agil Bahar UDIN Bayu Chandra Hangesthi Buono, Abi Tonjo Can, Ahlul Haq Cecep Slamet Abadi Dianta Mustofa Kamal Dwi Budi Santoso Emir Ridwan, Emir Fachruddin Fachruddin Febrianto, Muhammad Rafi Fitri Wijayanti Gun Gun R Gunadi Gun Gun R Gunadi Gun Gun R Gunadi Gun Gun Ramdlan Gunadi Gunadi, Gun Gun Ramdlan Hamdi Hamdi Handaru, Fathir Zuhayr Jusafwar Jusafwar Kamal, Dianta Mustofa Khairunisa, Nabila Lufky Machfud Priyo Utomo Machfud Priyo Utomo Muhammad Raihan Abimanyu Muhammad Raihan Abimanyu Priyonggo, Hari Agung Rahman, Haolia Ramdana Ajie Satria Ramdana Ajie Satria RATNA KHOIRUNNISA Rosidi Rosidi Shomami, Amalina Sidiq Ruswanto Sumadipraja, Berlian Firdaus Wijanarko, Rahman Andre Yuli Mafendro Dedet Eka Saputra Yuliana, Arifia Eka