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Kota yogyakarta,
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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 6 Documents
 1 
Search results for , issue "Vol 1, No 1: APRIL 2016" : 6 Documents clear
Peningkatan Kualitas Bahan Bakar Padat Biomassa Dengan Proses Densifikasi Dan Torrefaksi Mochamad Syamsiro
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.
Analisis Kinerja Pembangkit Listrik Tenaga Biomasa Sawit (PLTBS) Pabatu PT Perkebunan Nusantara IV Saptyaji Harnowo
Jurnal Mekanika dan Sistem Termal Vol 1, No 1: APRIL 2016
Publisher : Universitas Janabadra

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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.
Potensi Waste to Energy Sampah Perkotaan untuk Kapasitas Pembangkit 1 MW di Propinsi DIY Wira Widyawidura; Jovita Irene Pongoh
Jurnal Mekanika dan Sistem Termal Vol 1, No 1: APRIL 2016
Publisher : Universitas Janabadra

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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).
Studi Kelayakan Ekonomi Pembangunan PLTD Sistem Dual Fuel dengan Gasifikasi Sekam Padi Kapasitas 50 kVA Syamsul Ma`arif; Rena Juwita Sari; Mochamad Syamsiro
Jurnal Mekanika dan Sistem Termal Vol 1, No 1: APRIL 2016
Publisher : Universitas Janabadra

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Abstract

Electrification ratio in Special Distric of Yogyakarta in 2015 still under 100%, but 100% villages has been electrified. It shows that several houses which far from village which has not been electrified. The alternative solution is to build a small power plant by utilizing rice husks which are quite abundant in Yogyakarta. Diesel Power Plant (PLTD) by dual fuel system studied had a capacity of 50 kVA. Dual fuel system is combination of diesel fuel and synthetic gas from gasification of rice husks. This study is discussed about potential of rice husks, gasification equipment design, electrical distribution, and economic feasibility studies. The results showed that 0.2% of rice husks in Yogyakarta is enough to fulfill fuel requirements of PLTD by dual fuel system. Comparison of fuel requirements in PLTD by dual fuel system is 40% or about 4.72 liters/hour of diesel fuel and 60% synthetic gas from gasification of rice husk as much as 33.19 kgs/hour. Reactor is designed to fulfill gasification process for 2 hours every batch. The system produced 31.68 kWh distributed to 2 home industries, 48 households with each capacity is 450 VA, and street lighting. Investment to build PLTD by dual fuel system is Rp. 700,310,500.00 and operational & maintenance costs is Rp. 458,196,000.00 per year. The economic feasibility study to build PLTD by dual fuel system is claimed feasible if minimum price of electricity is Rp. 2,417.00 which gain NPV and IRR of Rp. 568,819.00 and 12.03%,respectively and payback period of 4 years.
Pengolahan Sampah Plastik Jenis PP, PET dan PE Menjadi Bahan Bakar Minyak dan Karakteristiknya Untoro Budi Surono; Ismanto Ismanto
Jurnal Mekanika dan Sistem Termal Vol 1, No 1: APRIL 2016
Publisher : Universitas Janabadra

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Abstract

Increasing use of plastics is a consequence of the development of technology, industry and population. On one side, plastic invention has a tremendous positive impact, because the plastic has more advantages than other materials. But on the other hand, plastics have a harmful negative impact, so it is necessary to find the solution. Alternative handling of plastic waste is converting plastic waste into fuel oil. Processing plastic waste into fuel oil can be done with the process of cracking. In this study will be designed and tested a device to process plastic waste into fuel. In this study will try to process plastics waste of PE, PP and PET by thermal cracking. The main objective of this study was to determine the best operating conditions of device designed to obtain the results of the optimal fuel. From this study it can be concluded that PP produce the most oil with LPG needs of the least and the fastest processing time. At this experiment, PET does not produce oil but produces material in powder form. Oil from PP has higher calorific value than the calorific value of diesel, petrol, LPG and kerosene. Too high the rate of heat is causes the oil produced is reduced, while the smaller the rate of heat causes the processing time becomes longer. The resulting oil from processing of PP and PE based on the content of the number of carbon atoms approaching gasoline and kerosene.
Perbandingan Laju Korosi Pada Baja Karbon Rendah dan Stainless Steel Seri 201, 304, dan 430 Dalam Media Nira Yunaidi Yunaidi
Jurnal Mekanika dan Sistem Termal Vol 1, No 1: APRIL 2016
Publisher : Universitas Janabadra

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Abstract

Corrosion can easily be found in various types of equipment made of metallic substrates. Low carbon steel and stainless steels are materials that is widely used in machine tools and structure of the food and beverage industry. Low carbon steel is preferred because it is relatively inexpensive, but less resistant to corrosion, so it is necessary substitution with materials that are more resistant to corrosion, thereby increasing the economic value of equipment or machinery. Juice cane (nira) is the result of a milking cane plant into raw materials for white sugar. Juice contains sucrose, reduction sugar, organic and inorganic substances and water. Juice is acidic as pH below 7 due to the activity of microbes in it, and over time the juice will become more acidic. This study aims to determine the corrosion rate of low carbon steel and stainless steel SS 201, SS 304 and SS 430 series in the medium juice at room temperature. Corrosion testing done in three cell electrodes based on the Tafel extrapolation method. The test results showed that the lowest corrosion rate occurs in SS 304, while the highest corrosion rate occurs in SS 430. The corrosion rate of SS 304 on the juice is low, while the corrosion rate of low carbon steel, SS 201 and SS 430 were moderate. The corrosion rate of the material on the juice is strongly influenced by the juice condition, mainly by the pH value.

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