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INDONESIA
Jurnal Mekanika dan Sistem Termal
Published by Universitas Janabadra
ISSN : 25273841     EISSN : 25274910     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Jurnal Mekanika dan Sistem Termal (JMST) adalah jurnal terbuka yang berisikan hasil-hasil penelitian ilmiah. Jurnal ini bertujuan untuk mempermudah penyebaran informasi ilmiah yang berkualitas secara cepat di seluruh tanah air. Jurnal Mekanika dan Sistem Termal (JMST) terbit 3 kali dalam setahun.Secara berkala JMST terbit setiap bulan April, Agustus, dan Desember.
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue "Vol 1, No 3: DESEMBER 2016" : 5 Documents clear
Pengaruh Pemanasan Bahan Bakar dan Penambahan Biodiesel dalam Solar terhadap Opasitas Mesin Diesel Mitsubishi L300 Diki Cahyo Gumilang; Danar Susilo Wijayanto; Husin Bugis
Jurnal Mekanika dan Sistem Termal Vol 1, No 3: DESEMBER 2016
Publisher : Universitas Janabadra

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Abstract

The purpose of this research is to: (1) investigate the effect of fuel heating through spiral-fin pipes in the radiator upper tank towards exhaust gases opacity of Mitsubishi L300 Diesel Engine. (2) investigate the effect of biodiesel adding into diesel fuel towards exhaust gases opacity of Mitsubishi L300 Diesel Engine. (3) investigate the effect of fuel heating through spiral-fin pipes in the radiator upper tank and biodiesel adding into diesel fuel towards exhaust gases opacity of Mitsubishi L300 Diesel Engine. (4) investigate the best result beetwen fuel heating through spiral-fin pipes in the radiator upper tank and biodiesel adding into diesel fuel towards exhaust gases opacity of Mitsubishi L300 Diesel Engine. This research was a quantitative with experiments methods. The result of this reserach is: (1) Fuel heating decreased opacity level of Mitsubishi L300 diesel engine. The largest decrease of opacity level occured on fuel heating using spiral fin pipes with 6 spiral threads 44,175 (%). (2) The addition of biodiesel into diesel fuel decreared opacity level of Mitsubishi L300 diesel engine. The best opacity level occured in addition the mix of 30% biodiesel and 70% diesel fuel 39,025 (%). (3) Fuel heating and addition at biodiesel in diesel fuel decreased opacity level in Mitsubishi L300 diesel engine. The largest decrease of opacity level occured at 30% biodiesel and 70% diesel fuel level and fuel heating used the spiral fin pipes with 2 spiral thread 34,4 (%).
Optimasi Hidrolika Sumur X Lapangan Bunyu Kalimantan Timur dengan Metode Bit Hydraulic Impact Sri Haryono; Wira Widyawidura
Jurnal Mekanika dan Sistem Termal Vol 1, No 3: DESEMBER 2016
Publisher : Universitas Janabadra

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Abstract

Bunyu Field placed on the Tarakan Basin, which is one hydrocarbon basins area of East Kalimantan. Formation that penetrated by the drill bit consist of sandstone, siltstone, clay stone and coal. Therefore, we need to rearrange the drilling mud system particularly on drilling mud hydraulics system. This study aims to optimize the hydraulic system in the process of drilling for wells X Fields Bunyu using bit hydraulic impact (BHI) method. The output of this method are to determine the optimum BHI fluid flow rate, penetrating power, nozzle size, and compare these parameters with the actual drill data before optimization (actual data) so that the penetration of the formation process is also optimal.  Based on actual data of well drilling there are four (4) point penetration depth (from total 13 (thirteen) point) should be optimized particularly on drilling hydraulics system by changing the size of the aperture area on the drill nozzle in accordance with the calculation using BHI method
Analisis Energi terhadap Performa Boiler Tipe Fluidized Bed Combustion Maedanu Fasola Putra; Danar Susilo Wijayanto; Nugroho Agung Pambudi
Jurnal Mekanika dan Sistem Termal Vol 1, No 3: DESEMBER 2016
Publisher : Universitas Janabadra

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Abstract

The research aims to investigate the condition of Basuki boiler based on the energy analysis result. The research used quantitative-descriptive method. The population of this research was daily record of Basuki boiler. The sample was daily record of Basuki boiler performance for 1 year (February 2015 to January 2016). The sample was taken using purposive sampling method. The research analyzed energetic efficiency and heat losses were included. Based the result of the research, it can be concluded that Basuki boiler condition based on its energy analysis was good, because the energetic efficiency (83,14%) was higher than the company’s target (80%). Total heat losses occured during boiler operation at 16,86% was devided into (1) heat loss in the flue gas (5,15%); (2) heat loss caused by unburned H2 gas (5,47%); (3) heat loss caused by water content in the fuel (1,50%); (4) heat loss caused by the humidity (0,58%); (5) heat loss caused by imperfect combustion (0,13%); (6) heat loss caused by radiation and indeterminable heat loss (4,03%).
Pengaruh Variasi Lubang terhadap Koefisien Debit pada Wadah Terbuka Berisi Oli Lia Yunita
Jurnal Mekanika dan Sistem Termal Vol 1, No 3: DESEMBER 2016
Publisher : Universitas Janabadra

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Abstract

This study aims to determine the effect of variation of the coefficient of discharge hole in an open container. The flow of fluid out of the hole has a cross-sectional area which is different from the actual cross-sectional area, the phenomenon is called venous kontrakta. Comparison of real debit and debit theoretically called the discharge coefficient (Cd). Experimental method used to determine the coefficient of discharge of oil flow in open containers using the software help logger pro 3.8.4. In this study, it was carried out various forms holes that of a circle and a triangular hole using an open container (jar) containing oil. The experimental results show that the circle-shaped hole has a coefficient of discharge is greater than the triangular hole.
Pengaruh Jumlah Konsentrasi Larutan Garam Pada Proses Quenching Baja Karbon Sedang S45C Yunaidi Yunaidi
Jurnal Mekanika dan Sistem Termal Vol 1, No 3: DESEMBER 2016
Publisher : Universitas Janabadra

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Abstract

Quenching is heat treatment process to increase the hardness and strength of steel. Important factors in the quenching include design of the equipment, type of coolant, coolant concentration, bath temperature, and motion rate during cooling. There are several types of cooling media that can be used in the quenching including water and oil. This study discusses the influence of dissolved salt concentration as a coolant in the quenching of S45C steel. The concentration of salt solution made variation between 0% to 25% by volume solution of 10 liters each. Quenching starts from the heating of steel in the furnace up to the austenitizing temperature and held at that temperature for 30 minutes followed by rapid cooling. Salinity in quenching media greatly influence the value of tensile strength and the hardness of steel. The higher salinity will decrease tensile strength and ductility. The higher salinity can accelerate the cooling process, evidenced by the emergence of a growing martensitic structure and refined at the higher salinity. Steel hardness will increase with increasing salinity.

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