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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 4 Documents
 1 
Search results for , issue "Vol 2, No 1: APRIL 2017" : 4 Documents clear
Pengaruh Tipe Mixer Ejektor dan Sudu Non-Twisted Naca 6412 Terhadap Daya Listrik Turbin Angin Poros Horizontal Wisnu Aristyawan; Danar Susilo Wijayanto; Nugroho Agung Pambudi
Jurnal Mekanika dan Sistem Termal Vol 2, No 1: APRIL 2017
Publisher : Universitas Janabadra

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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.
Pengaruh Penambahan Fin Pada Sudu Terhadap Cut In Speed Turbin Angin Savonius Tipe L Deny Prabowo; Danar Susilo Wijayanto; Indah Widiastuti
Jurnal Mekanika dan Sistem Termal Vol 2, No 1: APRIL 2017
Publisher : Universitas Janabadra

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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.
Studi Eksperimental Unjuk Kerja Campuran Solar-Biodiesel Minyak Jelantah Pada Mesin Diesel Ade Setiawan; Joko Winarno; Mochamad Syamsiro
Jurnal Mekanika dan Sistem Termal Vol 2, No 1: APRIL 2017
Publisher : Universitas Janabadra

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Abstract

In this study, biodiesel fuel produced from waste cooking oil was blended in 20%, 30%, 40% and 50% with the commercial diesel fuel. The biodiesel was collected from a company near Yogyakarta city. It was produced from transesterification process in a commercial scale reactor. The diesel-biodiesel mixtures were tested in a four-cylinder and four-stroke diesel engine with the compression ratio of 18 and water cooling system. The results show that the thermal efficiency of diesel engine increased with increasing the engine speed. The present of biodiesel also increased the thermal efficiency of the diesel engine. A mixture of 40% (B40) and 50% (B50) biodiesel resulted in the highest thermal efficiency. The brake mean effective pressure also increased with increasing the engine speed and biodiesel mixture. The specific fuel consumption showed a decrease in its value as a function of engine speed. Low specific fuel consumption means the high thermal efficiency of the diesel engine.
Penerapan Teknologi Pirolisis Untuk Konversi Limbah Plastik Menjadi Bahan Bakar Minyak di Kabupaten Bantul Ricki Rafli; Hudi Baitul Fajri; Ahmad Jamaludhin; Muhammad Azizi; Haris Riswanto; Mochamad Syamsiro
Jurnal Mekanika dan Sistem Termal Vol 2, No 1: APRIL 2017
Publisher : Universitas Janabadra

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Abstract

Plastic waste is an inorganic waste composed of chemicals that are harmful to the environment because it is not easy to decompose in the soil and requires decades to decompose. Therefore, it needs to do further processing by converting waste plastics into valuable products. This study aims to implement the pyrolysis technology to convert waste plastics into fuel oil which can be used as an energy source for small and medium enterprise. This technology has been applied in Bank Sampah Mekar Jaya 8, one of the recycling bank in Bantul Regency. This system is expected to empower the community for getting added value from waste plastics. The pyrolysis reactor was made with a production capacity of 20 kg. The reactor has a diameter of 600 mm and height of 900 mm with 2 main holes used to feed waste plastics and remove the residue. The system used 2 condensers which has a diameter of 100 mm respectively. The second condenser employed double pipe heat exchanger system which use water as a cooling medium. The water pump has been used for water circulation in the second condenser.

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