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Studi Kemungkinan Pemakaian Sekam dan Jerami Padi sebagai Bahan Bakar Briket untuk Ketel Uap di RSUP dr. Wahidin Sudirohusodo Makassar Mangallo, David; Hasan, Duma
Jurnal Teknik Mesin SINERGI Tahun ke-10, No. 1 (2012)
Publisher : Jurnal Teknik Mesin SINERGI

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Abstract

This study aims to: (1) make briquettes from rice husk and straw with some mixture proportions, (2) determine the heating value (HHV) and the compressive strength of the produced briquettes (3) determine the physical properties of the produced briquettes through the proximate analysis and determine the best briquettes mixture, and (4) know the possibility of using rice husk and straw as briquette fuel for steam boilers. The produced briquettes contained 85% of rice husk charcoal and straw, and adhesive subtance consisting of clay (10%) and strach (5%). The briquettes were made with five mixture proportions with an average mass ratio of 260 gramsduce briquettes briquette type E as the best. The examination of heating value reveals that the higher the percentage of staw in the mixture, the lower the briquette heating value will be; while the testing of compressive strength reveals that the higher the percentage of straw in the mixture, the higher the briquette compressive strength will be. Based on the proximate analysis, it is found that generally the produced briquettes have fulfilled the briquette standard quality. The results of calculations analysis reveal that there is a possibility to use briquettes made of rice husks and straw as steam boilers the ratio between the fuel mass flow rate and vapor mass flow rate is 0.231.
PENGARUH PENAMBAHAN GAS OKSIHIDROGEN TERHADAP UNJUK KERJA MOTOR BENSIN BERBAHAN BAKAR PERTAMAX Harman, Harman; Arif, Effendy; Hasan, Duma
DINAMIKA – Jurnal Ilmiah Teknik Mesin Vol 7, No 1 (2015)
Publisher : HALUOLEO UNIVERSITY

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Abstract

Salah satu cara yang dapat dilakukan bagi pengguna motor bensin untuk mensiasati kenaikan harga bahan bakar minyak adalah pemanfaatan gas oksihidrogen (HHO), yang dapat diperoleh dengan cara melakukan elektrolisa Air (H2O) sebagai suplemen. Penelitian ini bertujuan untuk mengetahui pengaruh gas Oksihidrogen terhadap unjuk kerja mesin dengan menggunakan bahan bakar Pertamax sebagai bahan bakar utama. Sebuah generator sederhana dibuat, dimana mampu menghasilkan gas HHO sebesar masing-masing 0.05 L/menit pada konsumsi daya 72 watt, dan 0.13 L/menit pada konsumsaai daya 96 watt. Perhitungan prestasi mesin diperoleh berdasarkan pengukuran data hasil eksperimen pada Mesin ENDURO XL 4-tak di laboratorium. Pada pengujian standar, dimana digunakan Pertamax  tanpa suplemen gas HHO, pada putaran 3000 RPM dan beban pengereman 3 kg, diperoleh torsi sebesar 1.8 N.m,  daya efektif (Ne) sebesar 0.57 kW, konsumsi bahan bakar spesifik (SFC) sebesar 0.609 kg/kWh serta efisiensi termis sebesar 13.49%. Pada pengujian dengan penambahan gas HHO  yang diperoleh dari generator, dengan konsumsi daya battery sebesar 96 watt serta pada putaran 3000 RPM dan beban pengereman 3 kg,  diperoleh torsi sebesar 3.9 N.m, daya efektif sebesar 1.225 kW, konsumsi bahan bakar spesifik sebesar 0.303 kg/kWh dan efisiensi termis sebesar 28.46%. Kesimpulan dari penelitian ini adalah bahwa dengan penambahan gas HHO yang diperoleh dari hasil elektrolisis, dapat meningkatkan Torsi, daya Efektif dan efisiensi termis  mesin serta menurunkan konsumsi bahan bakar spesifik
ANALISIS PERILAKU ALIRAN TERHADAP KINERJA RODA AIR ARUS BAWAH UNTUK PEMBANGKIT LISTRIK SKALA PIKOHIDRO Jamlay, Kristianus; Sule, Luther; Hasan, Duma
Dinamika Teknik Mesin:Jurnal Keilmuan dan Terapan Teknik Mesin Vol 6, No 1 (2016): Dinamika Teknik Mesin, 10 articles
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (417.867 KB) | DOI: 10.29303/dtm.v6i1.25

Abstract

Energy of water is one of the renewable energy that can be converted into electrical energy without pollution. Rotation, torque, and power generated by the water wheel can be used directly both for irrigation pumping and for running a rice mill even move the alternator and electrical generators. The purpose of this study was to find the best water wheel performance indicated by torque, rotation, and power as well as the relative speed of the water at the side of the blade. The results obtained in the preliminary test were the average water velocity of 2.50 m/s, the average rotation shaft of 79.78 rpm, the average torque on the shaft of 58.98 Nm, the average power of 510,67 W. The second results were also obtained as given the results and discussion section. It was found that the best water wheel performance based on the analysis was shown in the second test results.