Authors:
Hendrik Elvian Gayuh Prasetya
1
;
Joke Pratilastiarso
2
;
Radina Anggun Nurisma
1
;
Sulkan Efendi
1
and
Fifi Hesty Sholihah
1
Affiliations:
1
Powerplant Engineering Department, Politeknik Elektronika Negeri Surabaya, Surabaya, Indonesia
;
2
Powerplant Engineering Department, Politeknik Elektronika Negeri Surabaya, Surabay, Indonesia
Keyword(s):
Screw compressor, FMEA, LTA, MTTF
Abstract:
Screw compressor is a compressor that uses impeller media to compress air. This compressor is included in the type of rotary compressor. In the work process, the screw compressor is equipped with several supporting components. The screw compressor consists of 5 components, namely: intake filter, main motor, v-belt, screw compressor, and oil filter. To maintain the performance of the screw compressor, it requires a method that can predict the critical time in screw compressor components and can determine the impact of damage on an operation. In this study, qualitative analysis and quantitative analysis will be conducted to predict and determine the time and effect of screw compressor components failure. The method used in qualitative analysis is Failure Mode and Effect Analysis (FMEA) and Logic Tree Analysis (LTA) methods. While the quantitative analysis uses the reability function (Rt), hazard rate function (ht), and mean time to failure (MTTF) parameters. By using qualitative FMEA a
nalysis, the repair priority order in the screw compressor is the oil filter, and oil filter is C category using LTA analysis, it means if the failure mode does not have an impact on safety or operational plant and only causes relatively small economic losses for repairs. While quantitative methods results recommended treatment time, intake filter must be maintained 25 - 27 days, oil filter must be maintained 28 - 29 days, V-belt must be maintained 105 - 125 days, the main motor must be maintained 330 - 335 days, and screw must be maintained 292 - 313 days.
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