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Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin
Published by Universitas Halu Oleo
ISSN : -     EISSN : 25028944     DOI : -
Core Subject : Engineering,
Mechanical Engineering
Jurnal ENTHALPY memuat artikel hasil penelitian tugas akhir mahasiswa di lingkup Jurusan Teknik Mesin, Fakultas Teknik Universitas Halu Oleo Entalpy Jurnal Ilmiah Mahasiswa Teknik Mesin diterbitkan 4 (empat) kali setahun pada bulan Februari, Mei, Agustus dan November.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 5 Documents
 1 
Search results for , issue "Vol 4, No 2 (2019): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin" : 5 Documents clear
Analisa Sifat Mekanik Komposit Serat Gelas Pada Lapisan Yang Berbeda Andi Tri Setiawan; Salimin Salimin; Nanang Endriatno
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 4, No 2 (2019): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (391.955 KB) | DOI: 10.55679/enthalpy.v4i2.9960

Abstract

Nowadays, fiberglass composites are widely applied to the construction that receives tension and bending loads. The purpose of this research is to know and analyze the mechanical properties of fiberglass by using different layers. In this research the manufacture of composites using hand-lay-up method. The manufacture of specimen for the tensile test refers to the standard ASTM D 638-02 and standard ASTM D 790-02 bending test. The method used in data analysis is graph data analysis to see the relationship between interconnected parameters and dependence on the size of the specimen 13 mm and the number of variations in the composition of the specimen mixture. The results showed that the composition of the mixture with the highest tensile voltage of 60.2719 N/mm2 was in the variation of 5 layers and the bending test with a value of 116.93 N/mm2. While the lowest tensile strength is 33.2882 N/mm2 and the lowest bending of 100.84 N/mm2 is found in the composition of variation 2 layers.Keywords: composite, fiberglass, polyester resin
Analisa Proses Produksi dan Aplikasi Minyak Pirolisis Kulit Jambu Mete Sebagai Bahan Bakar Alternatif La Ato; Lukas Kano Mangalla; Samhuddin Samhuddin
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 4, No 2 (2019): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (421.006 KB) | DOI: 10.55679/enthalpy.v4i2.9964

Abstract

Energy is a basic human need, which continues to increase. Fossil fuels are one of the limited fuels. The purpose of the study is the analysis of the production process and application of cashew skin oil pyrolysis as an alternative fuel. A variation in the size of the material to obtain a liquid product pyrolysis results and perform testing pyrolysis results with the flame test. Pyrolysis carried out at a temperature of 300-400 oC. Performed pyrolysis with some variation in the size of the material, namely coarse, medium and smooth. The results of the study showed the higher the pyrolysis temperature the more liquid product mass-produced. Cashew seed skin pyrolysis by using ordinary water-cooling media produces 210 ml of liquid product, ICE cooler produces a liquid product of 225 ml and use the air-cooling medium by 160 ml. Second variation using skin Cashew nut medium with ordinary water pending media of liquid generated at 170 ml, ice water 165 ml and air 172 ml. The third variation of using cashew skin smoothly with regular water cooling produces a fluid of 217 ml, ES 220 and air 167 ml. Conducted research on the analysis of the production process and application of cashew skin oil pyrolysis as an alternative fuel.Keywords: energy, cashew skin, and pyrolysis
Pengaruh Media Perendaman Komposit Rami Poliester Terhadap Kekuatan Tarik dan Kekuatan Bending La Ode Muammar Fadli; Sudarsono Sudarsono; Al Ichlas Imran
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 4, No 2 (2019): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (322.699 KB) | DOI: 10.55679/enthalpy.v4i2.10124

Abstract

The purpose of this research is to know the influence of water absorption withfreshwater soaking media, and seawater to tensile strength and bending powerof ramie-polyester composite. The ramie-polyester composite research is madeby the method of hand-lay-up with a fiber-matrix fraction of 30:70 %. The specimen is made according to the ASTM D 638-01 tensile test Standard and ASTM D 9002 standard bending test. The Immersion test with freshwater soaking media, and seawater for 7 days. The tensile test and bending test is done for conditions before immersion and after immersion. The research results showed that the value of absorption specimen freshwater tensile test is 6.2948 %, and seawater is 5.1579 %. While freshwater bending test specimens are 6.2937 % and soaking water is 5.1575 %. The highest tensile strength was on the specimen without immersion 18.266 N/mm2 and the lowest tensile strength is on the freshwater  soaking specimen of 11.303 N/mm2. The highest bending strength was on the specimen without immersion 40,120 N/mm2 and the lowest bending strength is on the freshwater soaking specimen of 18,082 N/mm2. Keywords: composite, ramie, polyester, water absorption, tensile strength andbending.
Pengaruh Variasi Komposisi Terhadap Karakteristik Briket Campuran Sekam Padi Dan Kulit Jambu Mete La Manisi; Kadir Kadir; Abd . Kadir
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 4, No 2 (2019): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (394.016 KB) | DOI: 10.55679/enthalpy.v4i2.9968

Abstract

Rice husks and cashew nuts have an economical value of where can be transformed into an energy form one of them is briquette. This research aims to determine the influence of pressure composition on thermal characteristics of rice husk charcoal briquettes and cashew skin. In this study, the composition of the tested is briquette with a ratio of the raw material percentage of rice husk 30 % cashew skin 70 %, rice husk 50 % cashew skin 50 % and rice husk 70 % cashew bark 30%. The manufacture of briquette was performed pressure 50 kgf/cm2, 100 kgf/cm2, 150 kgf/cm2. The thermal testing of briquettes is carried out in a cylinder combustion furnace designed for natural airflow. In combustion testing used three briquettes for each composition. During the combustion, observations of the mass decline and increase in the fuel temperature increased by 1 minute using digital scales and K-Type Thermocouple. The results showed that the composition of mixing 30% rice husk: 70% cashew skin has the highest combustion temperature increase and the rate of decline in mass and long combustion at 50 kgf/cm2 pressure that the decline in the speed of the most rapid combustion of each minute is on the mixing briquette that has a composition of 30 % rice husk and 70 % cashew skin.Keywords: briquette, rice husk, and cashew skin
Studi Sifat Mekanis Biokomposit Serat Ijuk dan Serat Sabut Kelapa Untuk Aplikasi Helm Kendaraan Roda Dua Muradin Muradin; Muhammad Hasbi; Al Ichlas Imran
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 4, No 2 (2019): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (405.668 KB) | DOI: 10.55679/enthalpy.v4i2.9970

Abstract

Motorcycles are a popular means of transportation in most countries in Asia and developing countries including Indonesia. In the event that riding a motorcycle, the user must use a helmet to keep his head from collisions when accidents occur. The research aims to utilize palm fiber and fiber biocomposites as raw material for two-wheeled vehicle helmets. The composition of the fiber volume fraction is 40:60%, 50:50%, 60:40%, polyester resin matrix, and catalyst. The mixture is printed in the form of a biographic panel and formed an impact test specimen and hardness test. The results obtained that the highest impact strength value of 0.013 J/mm2 and the highest hardness value of 21.367 kg/mm2 in the fiber composition of 60:40%. The value of the lowest impact strength is 0.005 J/mm2, and the lowest hardness value is 16.523 kg/mm2 on the fiber composition 40:60%. Keywords: biocomposite, palm fiber, coir, polyester, hardness, and impact

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