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Jurnal Mekanika dan Sistem Termal
Published by Universitas Janabadra
ISSN : 25273841     EISSN : 25274910     DOI : -
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 23 Documents
Pengaruh Komposisi Bahan Baku dan Lama Waktu Pemasakan terhadap Kekuatan Tarik pada Pembuatan Kertas Seni dari Limbah Batang Jagung dan Kertas Bekas Apriani, Enda
Jurnal Mekanika dan Sistem Termal Vol 1, No 2: Agustus 2016
Publisher : Universitas Janabadra

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Abstract

This research was conducted with the aim to obtain raw materials and cooking time on the optimal papermaking art of corn stalks and waste paper to tensile strength. This study used a chemical process using NaOH as liquor. The variables used are mixtures of raw materials corn stalks (BJ) and waste paper (KB), is 100 : 0; 75 : 25; 50 : 50; 25 : 75 (%) and the cooking time, is 60, 120, 180 (minutes). The optimal results on the composition of raw materials is 25 BJ : 75 KB, and the cooking time for 180 minutes, so that the average tensile strength of 0,554 kgf / mm². Results of surface texture white paper pale, delicate texture, pore small paper, and flexible.
Peningkatan Kualitas Bahan Bakar Padat Biomassa Dengan Proses Densifikasi Dan Torrefaksi Syamsiro, Mochamad
Jurnal Mekanika dan Sistem Termal Vol 1, No 1: APRIL 2016
Publisher : Universitas Janabadra

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Abstract

Biomass is one of the renewable energy resource in Indonesia which has abundant resources potential. Biomass can be converted into energy by using several process method such as thermochemical dan biological processes. Biomass conversion into fuel is available in all three basic forms of matter : solid, liquid and gas. Generally, biomass solid fuel has low mass and energy density. This paper will review the technology to upgrade the quality of the solid fuel by means of densification and torrefaction. Combined densification and torrefaction processes will be an attractive option to produce high quality solid fuel.
Pengaruh Pemanasan Bahan Bakar dan Penambahan Biodiesel dalam Solar terhadap Opasitas Mesin Diesel Mitsubishi L300 Gumilang, Diki Cahyo; Wijayanto, Danar Susilo; Bugis, Husin
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 (%).
Rancang Bangun Mesin Pencacah Plastik Sebagai Bahan Baku Mesin Pirolisis Skala Komunal Syamsiro, Mochamad; Hadiyanto, Arip Nur; Mufrodi, Zahrul
Jurnal Mekanika dan Sistem Termal Vol 1, No 2: Agustus 2016
Publisher : Universitas Janabadra

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Abstract

Design and fabrication of plastic shredding machine has been conducted to supply the feedstock for pyrolysis of waste plastics to produce liquid oil. The machine has a capacity of 20-30 kg/h depending on the plastic type and thickness. We propose the integrated system for pyrolysis of waste plastics in small or medium scale which utilize our product as a source of energy for pyrolysis and shredding machine. The gaseous and solid products can be used for pyrolysis while the liquid oil will be used for powering the shredding machine. The excess liquid oil can be used as a fuel for household and small enterprise by employing pressurized cooking stove. The preliminary test shows that the shredding machine can be used for crushing PET bottle smoothly with the capacity of 14 kg/h. The capacity can be increased by adding the material input and by employing water to push the shredded plastic flowing down.
Analisis Kinerja Pembangkit Listrik Tenaga Biomasa Sawit (PLTBS) Pabatu PT Perkebunan Nusantara IV Harnowo, Saptyaji
Jurnal Mekanika dan Sistem Termal Vol 1, No 1: APRIL 2016
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Abstract

Palm Oil Biomass Power Plant (PLTBS) in Pabatu Estate, North Sumaterahas been in operation since 2010. The plant is planned to generate power up to 3.2 Mwatt with waste fuel from empty fruit bunches palm oil. Since this operation, the performance of this biomass power plant ( PLTBS) not reachsits target as designed. Electric power generated is under rated capacity and the fuel can not use empty fruit bunches, and changes by oil palm shell that has a higher economic value. This study aims to analyze and audit the performance of biomass power plant/PLTBS Pabatu. Analysis was conducted on the performance of each equipment operational parameter that was collected during this study. These equipment are: boiler, turbine, generator, condenser and pump in accordance with the Rankine cycle. Data operational calculated based on Thermodynamic analysis with the results show the performance of PLTBS Pabatu still not optimal. Thermal efficiency is still low about 22%, boiler efficiency 58,2%, actual steam rate 8,23 kg/kwh (calculation). Many effort should be taken to increase the power plant performance by improving the operational parameter of the equipment as well as biomassfuel properties and treatment.
Pengaruh Tipe Mixer Ejektor dan Sudu Non-Twisted Naca 6412 Terhadap Daya Listrik Turbin Angin Poros Horizontal Aristyawan, Wisnu; Wijayanto, Danar Susilo; Pambudi, Nugroho Agung
Jurnal Mekanika dan Sistem Termal Vol 2, No 1: APRIL 2017
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Abstract

The purpose of this study was to determine the effect of mixer ejector and a non-twisted blade airfoil NACA 6412 toward power output generated in the horizontal axis wind turbine (HAWT). The type of blade used in this experiment is a blunt, rectangular and taper. There are three artificial low wind-speed applied at 2.5 m / s, 3.5 m / s and 4.5 m/s. All the experimental data is carried out by several instruments such as anemometer, tachometer, multitester and recorded by a data logger. The results showed that the blunt wind turbine blade produces the highest power output at 0.43 W at a wind speed of 4.5 m/s with a rotor rotational speed of 183.4 RPM. While, the lowest power output produced by taper blade power output at of 0.07 W at 87.9 rpm at a wind speed of 2.5 m/s. In the experimental of additional of the mixer ejector, diffuser type produces the highest power output at 0.83 W at a wind speed of 4.5 m/s. The power output increased by 93 % compared to an original wind turbine without the addition of mixer ejector at 0.43 W.
Optimasi Hidrolika Sumur X Lapangan Bunyu Kalimantan Timur dengan Metode Bit Hydraulic Impact Haryono, Sri; Widyawidura, Wira
Jurnal Mekanika dan Sistem Termal Vol 1, No 3: DESEMBER 2016
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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
Pengaruh Suhu terhadap Rendemen dan Nilai Kalor Minyak Hasil Pirolisis Sampah Plastik Mandala, Wirawan Widya; Cahyono, M Sigit; Ma`arif, Syamsul; Sukarjo, H B; Wardoyo, Wardoyo
Jurnal Mekanika dan Sistem Termal Vol 1, No 2: Agustus 2016
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Abstract

Plastic waste is one type of waste that would disturb the environment if it is not handled properly. Alternative treatment to solve this problem is by using pyrolysis technology that enable to convert plastic waste into fuel oil, charcoal, and non-condensable gas. The success of pyrolysis technology is influenced by several factors, including the type of reactor, the particle size, the processing time, and the temperature of the pyrolysis process. The purpose of this study was to determine the effect of temperature on the yield and the calorific value of plastic pyrolysis oil. Based on the experiments, increasing the temperature, the yield of the oil produced and calorific value will be higher. The yield and the highest calorific value generated for the pyrolysis process at a temperature of 400 0C, are 44% and 10,292 cal/ g respectively.
Potensi Waste to Energy Sampah Perkotaan untuk Kapasitas Pembangkit 1 MW di Propinsi DIY Widyawidura, Wira; Pongoh, Jovita Irene
Jurnal Mekanika dan Sistem Termal Vol 1, No 1: APRIL 2016
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Abstract

The aim of this work was to study the potential of the waste to be converted into electrical energy (waste to energy) with a target capacity of the biomass power plant (PLTBiomassa) of 1MW. This study was focused in DIY province-Indonesia and the organic waste type used is municipal solid waste (MSW) that collected at the landfill area. The method used inthis paper is by calculating the number of waste based on the composition of waste and finding the potential of electrical power that can be converted from each type of waste through thermochemical and biochemical conversion process. The amount of waste collected in the landfill in DIY province have been sufficient to fulfill target of 1 MW electrical power. The potential of power generated by MSW in landfill are 1541.97 kW generator with 1039.95 kW for thermochemical system (gasification technology) and 502.02 kW for biochemcal system (anaerobic digestion).
Pengaruh Penambahan Fin Pada Sudu Terhadap Cut In Speed Turbin Angin Savonius Tipe L Prabowo, Deny; Wijayanto, Danar Susilo; Widiastuti, Indah
Jurnal Mekanika dan Sistem Termal Vol 2, No 1: APRIL 2017
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Abstract

This research aims to analyze the influence of additioning fin on blade of  the cut in speed by a savonius wind turbine type L with variation of wind speed. This research used a  savonius wind turbine type L with a rotor diameter of 1.1 m and a rotor height of 1.4 m. The method used is the experimental method by varying the addition of the fin on blade and the wind speed. Variables taken in this research are wind speed, variation of additioning fin, and cut in speed by wind turbine. Variations of additioning fin are without fin, 1 fin, 2 fin, 3 fin, 4 fin. Testing tools using anemometer. The results of the research was found that the additioning fin affect the cut in speed with the number of fin in the blade is linearly result in increasing ot the cut in speed. The lowest cut in speed is 2 m/s achieved the addition of 4 fin on the blade.

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