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All Journal Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin
S. Syahrul, S.
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Aerospace Engineering Automotive Engineering Mechanical Engineering Physics

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Pengaruh variasi kecepatan udara dan massa bahan terhadap waktu pengeringan jagung pada alat fluidized bed Syahrul, S.; Romdhani, R.; Mirmanto, Mirmanto
Dinamika Teknik Mesin Vol 6, No 2 (2016): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v6i2.15

Abstract

Indonesia is an agricultural country that has many agricultural products so that post-harvest handling is necessary so that the crop is not quickly broken when stored or distributed. One harvests in Indonesia, which require post-harvest handling such as corn. Based on SNI, the maximum moisture content of corn feed raw material has a moisture content of 14%. The water content of the corn used is 20% with a tolerance of ± 0.5%. Variations air speed used is 5 m /s, 6 m /s and 7 m /s with a variation of the mass of material that is 0.5 kg, 1 kg, and 1.5 kg. With the variation of air velocity and mass of the material showed that the higher the speed of the air, the faster drying time. In addition, the heavier material is drained, it will take longer. Variations of air velocity and mass of materials that require the fastest drying time is the air speed of 7 m /s with a mass of 0.5 kg. Variations of air velocity and mass of material that takes the longest drying air is at a speed of 5 m / s with a mass of 1.5 kg of material.
Characterization of nanocellulose from banana stem fiber and its bionanocomposite as a thermal insulation material Syahrul, A.I.; Rosyidin, M.D.; Hidayat, S.; Khaerunisa, K.; Soraya, N.; Sari, N.H.; Syahrul, S.
Dinamika Teknik Mesin Vol 15, No 1 (2025): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v15i1.1009

Abstract

Nanocellulose has garnered significant attention due to its unique properties and potential in various applications, including thermal insulation. The abundant banana stems found in Lombok Island generate considerable waste that can be utilized as a raw material for nanocellulose. This research aims to characterization of nanocellulose derived from Kepok banana stems and its composites as thermal insulation in solar panels. Nanocellulose was produced using acid hydrolysis with sulfuric acid (H2SO4), and several treatments were carried out including Natrium hydroxide (NaOH), Sodium chlorite (NaClO2), Sulfuric acid (H­2SO4), The results show that nanocellulose from banana stems has a tensile strength of 13.374 MPa - 13.63 MPa. The addition of nanocellulose was found to increase the tensile strength of the composite reaching 13.374 up to 13.63 MPa, thermal conductivity 0,1692 up to 0,1940 W/mK and is quite heat resistant at a temperature of 200 °C. SEM photos of nanocellulose show surface roughness and produce interface strength between banana stem fiber nanocellulose and polyester resin. With solid bonding, good tensile strength, conductivity and thermal stability, bionancomposites from banana stem can be used as thermal insulator (backsheet) materials for solar panels.
Evaluasi efektifitas effective microorganism-4 (EM-4) dalam menaikkan volume produksi biogas Tira, H.S.; Syahrul, S.; Umbara, E.G.
Dinamika Teknik Mesin Vol 8, No 1 (2018): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v8i1.40

Abstract

Anaerobic digestion process of cow dung was observed over 30 days with addition of effective microorganism – 4 in regard to improve biogas volume production. Temperature for biogas production was kept constant and was conducted at mesophilic mode. It was found that EM-4 addition was effective to increase the biogas yields production. The improvement in biogas volume was recorded as high as 87.8% which was achieved in 10% v/v EM-4 addition. However, the solution concentration should be limited in certain amount. By experimentally work, the results showed that adding more EM-4 into digestate resulted in reduction of biogas volume gradually. The most influential factor of the result may be attributed by the alteration of digestate pH from netral to more acidic. This acidic condition hampered microorganism to do anaerobic process well. 
ANALISA NILAI KALOR DAN LAJU PEMBAKARAN PADA BRIKET CAMPURAN BIJI NYAMPLUNG (Calophyllm Inophyllum) DAN ABU SEKAM PADI Almu, M. Afif; Syahrul, S.; Padang, Yesung Allo
Dinamika Teknik Mesin Vol 4, No 2 (2014): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v4i2.61

Abstract

The fuel is a source of energy with greatest consumption today. Where that stock is become less until 2025th. That’s way, it must to find some new energy to replacement, that one of alternative that is a fuel of solid phase that become from briquette. The briquette that use is compound between nyamplung’s fruit and rice husk. In this case because in NTB nyamplung’s fruit and  rice husk  is overabundance.This research conducted three testing that are testing of heat value, testing of combustion rate, and testing of dry measure. In case where to testing of heat value using bomb calorimeter. Independent variable both of this research is combine. Between nyamplung’s fruit and rice husk with comparison 1:1, 2:1, 3:1, 1:2, and 1:3. The highest heating value is obtained from sample 3:1 as big as 4792,40 cal/gr, the lowest rate of combustion from sample 3:1 as big as 0,00156 gr/s and the lowest of dry measure lowest from sample 1:1 that is 21,52%. 
Co-Authors A. Albayani, A. A. Mulyanto Khaerunisa, K. M. Afif Almu, M. Afif M. Mirmanto, M. N. Nurchayati, N. N. Nurpatria, N. N.H. Sari Nisfu Sakban, Nisfu Pandiatmi, P. R. Romdhani, R. Rosyidin, M.D. S. Hidayat, S. S. Romdani, S. S. Saparudin, S. S. Sukmawaty, S. Sayoga, I.M.A. Soraya, N. Syahrul, A.I. Tira, H.S. Umbara, E.G. Yesung Allo Padang, Yesung Allo