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Turbulen : Jurnal Teknik Mesin

turbulen
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Published by UNIVERSITAS TRIDINANTI PALEMBANG

ISSN : 26213354 EISSN : 26560186 DOI : http://dx.doi.org/10.3676

Core Subject : Science, Engineering,

Materials Science & Nanotechnology Mechanical Engineering

Turbulen (pISSN 2621 3354) It's focused on original articles in the form of research results or literature review which provides insight in the field of mechanical engineering and machinery that includes the field study of energy conversion such as combustion engineering, internal combustion engine, fluid dynamics, thermodynamics, heat-mass transfer, HVAC (Heating, Ventilation and Air Conditioning), tribology and sustainable-renewable energy. The field study of metallurgical sciences like materials processing, heat-treatment, metal forming-testing and advances materials. Construction field study with analytical and computational of mechanical rigid body as well as structural mechanisms and manufacturing-industrial study such as metal machining, manufacturing processes and manufacture engineering or as well as other related mechanical engineering field study.

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Articles 46 Documents

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Full coverpages (vol.2,no.2, dec 2019) Redaksi - Editor
Jurnal Turbulen Vol 2 No 2 (Dec 2019)
Publisher : Universitas Tridinanti Palembang

PEMODELAN UMUR FATIK ALAT PENGANGKAT ROKET KAPASITAS 20 TON MENGGUNAKAN ANSYS WORKBENCH LASINTA ARI NENDRA WIBAWA
Jurnal Turbulen Vol 2 No 2 (Dec 2019)
Publisher : Universitas Tridinanti Palembang

A rocket lifting device is a tool designed to facilitate the rocket assembly process. The device is mounted on a crane and is equipped with two webbing slings placed at the bottom. The study examines the fatigue life prediction of rocket lifting device using the finite element method. The design of rocket lifting device using Autodesk Inventor Professional 2017, while finite element analysis using Ansys Workbench. It is subjected to a 20-ton load with a fully-reserved type of loading. The fatigue life prediction using the Gerber mean stress theory. The material for the rocket lifting device is Aluminum alloy. The simulation results show that the rocket lifting device has a minimum fatigue life of up to 4.17 x 107 cycles with a minimum safety factor of 1.14. Keywords: aluminum alloy, ansys, rocket lifting defice, finite element method, fatigue life prediction

PERBANDINGAN COP AC SPLIT KAPASITAS 1 PK MENGGUNAKAN REFRIGERANT R410a DAN R32 DENGAN VARIASI KECEPATAN FAN EVAPORATOR Kusnandar Kusnandar; Yudhy Kurniawan
Jurnal Turbulen Vol 2 No 2 (Dec 2019)
Publisher : Universitas Tridinanti Palembang

Air Conditioning Split or AC Split is one of the air conditioning system that works by using a vapor compression system. The vapor compression system is one of the most cycles used for mechanical refrigeration systems, while the vapor refrigerant will be compressed by the compressor as the main component in addition to other components such as condensers, expansion valves and evaporators. This research focuses on AC Split Coefficient of Performance (COP) with Comparison of Refrigerants R410a and R32 with variations speed based on the Evaporator Fan speed. This analysis method uses two AC Split each capacity is 1PK with two different of refrigerants R32 and R410a, as well as varying in Low, Medium and High-level speed with air flow velocity in each mode respectively 1.2 m/s, 1.5 m/s and 1.9 m/s. From the result that COP on R410a refrigerant is 8.13 and COP on R32 refrigerant is 5.3. And also, the efficiency of R410a is 72.8% and R32 is 70.67%. So, AC Split with refrigerant R410a has better COP compared with AC Split with refrigerant R32. Keywords: COP, AC Split, Refrigerants, R410a, R32, Efficiency

ANALISIS PENGARUH PENAMBAHAN KARBON DAN PROSES HARDENING UNTUK MENINGKATKAN NILAI EKONOMIS RODA GIGI MESIN BUBUT Ella Sundari; Taufikurrahman Taufikurrahman
Jurnal Turbulen Vol 2 No 2 (Dec 2019)
Publisher : Universitas Tridinanti Palembang

In many industrial components which made of steel such as lathe gears, most of its were usually use medium carbon steel. Because this kind of steel has high wear resistance and shock resistance, but its cost more expensive than low carbon steel. Because of this reason, the author try to use low carbon steel as a base material (raw material) for lathe gear in order to to decrease production costs. However, low carbon steel material has a carbon content of less than 0,3%, so it has poor tensile, less hardness and less friction resistance. But it strength can be increased by adding carbon, namely by means of solid carburizing and hardening process. In this study the Pack Carburizing was done at a temperature of 950oC with 1 hour holding time, and used carburizing media such as coal charcoal and Calcium Carbonat (CaCO3) as catalyst with composition of 80% + 20%. Hardening is carried out at 670oC, 760oC and 850oC. The cooling method used direct cooling method and the cooling media was used oil..And then followed by material composition test, hardness test, and micro structure test. After heat treatment, there were 0.3%, increase value in hardness. The highest harness value was at 112.66 HRB and at carburizing temperature of 850oC, Phases formed were Ferrite, Perlite and Martensite. Keywords: Pack Carburizing, Hardening, Gear

PENGARUH VARIASI TEMPERATUR NORMALIZING TERHADAP BESAR BUTIR DAN KEKERASAN MATERIAL BAJA KARBON AISI 1035 Suhardan Suhardan; R Kohar
Jurnal Turbulen Vol 2 No 2 (Dec 2019)
Publisher : Universitas Tridinanti Palembang

Mechanical properties of steel do not only depend to its chemical composition but also its micro structure. This mechanical property can be modified with heat treatment processes, one of them is by using normalizing method. This process is able to manipulate both micro structure and particle size. In order to investigate the influence of Normalizing temperature, An AISI 1035 steel is treated by Normalizing with various temperatures from 820 to 880 ⁰C. Since each sample is treated by same method, the microstructure of each sample is also similar. In addition the difference variation of normalizing temperature among each sample causes the variation of grain size. The increasing of temperature Normalizing causes the increasing of its grain size. The influence of of grain size is investigated by doing Rockwell Hardness Test. Based on the result, steel which has bigger grain size has higher hardness property. Keywords: : Mechanical Characteristics, Micro Structure, Normalizing, Grain Size

STUDI PERBANDINGAN KINERJA FREEZER 1/5PK DENGAN R134a DAN MUSICOOL (MC-134) Heriyanto Rusmaryadi; Iskandar Badil
Jurnal Turbulen Vol 2 No 2 (Dec 2019)
Publisher : Universitas Tridinanti Palembang

The purpose of this research is to design a freezer system that is used to study the comparison of the performance of a 1/5 PK freezer with the working fluid R-134a and Musicool MC-134. In this research, the main components used are 1/5 PK hermetic compressor, plate surface evaporator, water cooled condenser, and capillary pipes. The research was carried out by replacing R-134a refrigerant with Musicool MC-134 without changing the supporting components of the system (retrofit). The results showed that the retrofit from R-134a to Musicool MC-134 was very capable and feasible to be implemented. The system will be safe if the components of the system used are in accordance with the prerequisites (from the old working fluid, R-134a), the opposite will cause insecurity due to susceptibility to leakage (since the substitution of working fluid, MC-134, is more flammable). In addition, the use of MC-134 will result in a temperature drop that is much faster than R-134a, in other words "cooler faster" which is 30% faster (for a set point temperature of -18oC). Keywords: Retrofit, Musicool, R-134a, MC-134, Freezer

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