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Journal : Infotekmesin

Desain dan Analisis Karakteristik Pegas Koil Sistem Suspensi Belakang untuk Kendaraan Ringan Sepeda Motor Listrik Sarihidaya Laksana, Nur Akhlis; Aji Girawan, Bayu; Setia Pribadi, Joko
Infotekmesin Vol 13 No 1 (2022): Infotekmesin: Januari, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i1.908

Abstract

The vehicle's suspension system have function to reduce vibrations from the shock between the wheels and the road. Previous research discussed the simulation of spring loading with material variations. This research focuses on the design and analysis of springs that will be used in Electric Motorbikes (SEMOLI). Spring analysis between cast stainless steels and carbon stainless steels is done by calculating displacement transmissibility. The analytical method used is the SDOF harmonic method to determine the system response. The results of the analysis are considered for the selection of springs by determining the displacement transmissibility and the response of the suspension system. The results of the analysis of the characteristics of cast stainless steels and carbon stainless steels for active springs 6, 7, and 8 at speeds of 10 km/hour, 20 km/hour, 40 km/hour, 80 km/hour showed a decrease in displacement transmissibility. Characteristics for stainless steel material at steady state condition with active spring 6 is 0.3 second, while 7 and 8 are 0.25 second. The characteristics of overshoot for cast stainless steel material with active spring 6 are 55.3%, 7 are 52.7% and 8 are 50.3%. Stainless steel material has the characteristics of overshoot on active spring 6 is 55.8%, active spring 7 is 53.3%, and active spring 8 is 51 From the characteristic analysis, the best material obtained is cast stainless steel with a smaller displacement value dan good respon.
Analisis Pembentukan Endapan pada Transportasi Gas Alam Pengaruh Tekanan, Temperatur, dan pH. Sari Nurhidayat, Akhlis Rahman; Mediansyah; Sarihidaya Laksana, Nur Akhlis
Infotekmesin Vol 15 No 2 (2024): Infotekmesin, Juli 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i2.2331

Abstract

Natural gas production areas and processing sites for use in the residential and industrial sectors are separated by a long distance. Contaminants such as H2S and CO2 are present when natural gas is transported. The reaction process that occurs in the pipe walls will experience a reduction in material. A process that occurs repeatedly over a long time will form deposits at the bottom of the pipe. This research investigates the sludge produced by the pigging process every month. The sludge characters are identified using SEM and XRD testing, while the condensate is examined using XRF testing. The XRF results show that the presence of Cl- in the condensate increases the anodic reaction in the corrosion process. Condensate has a pH of 5-6, which will cause corrosion around internal piping. Sludge produces Fe3O4, FeS, and FeCO3. Fe3O4 is more dominant than FeS and FeCO3. More FeS is produced by % mol H2S than by % CO2. Because of the existing FeS, the particles formed are irregular.