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Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin

ENTHALPY
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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 191 Documents

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Pengaruh Variasi Ukuran Mesh Terhadap Nilai Kalor Briket Arang Tempurung Kelapa Sabindo, La Ode; Kadir, Kadir; Hasbi, Muhammad
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 5, No 1 (2020): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Energy demand and consumption is currently increasing and is focused on the use of fuel oil and gas whose prices are increasing and reserves are very limited. One alternative energy that needs to be developed through processing agricultural waste is briquette fuel. The raw material for briquettes used in this study is coconut shell. The purpose of this study was to determine the effect of variations in mesh size on the thermal characteristics of coconut shell charcoal briquettes. The research method used in the form of experiments with the stages of the implementation of the coconut shell made and crushed and sifted using 20, 30 and 40 mesh sieves and using starch adhesive 10 % of the weight of raw materials with a pressure of 100 kgf/cm². The results showed that the smaller the particle size, the higher the heating value of 6118.49 cal/g. 8.45% moisture content, 2.56 % ash content, 13.28 % fly substance and 75.71 % bonded carbon. The conclusion of this research is the level of thermal characteristics of coconut shell charcoal briquettes is influenced by particle size, the smaller the particle size, the higher the heating value produced.Keywords: Briquette, coconut shell, starch, particle size

Analisa Proses Produksi dan Aplikasi Minyak Pirolisis Kulit Jambu Mete Sebagai Bahan Bakar Alternatif Ato, La; Mangalla, Lukas Kano; 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

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 Fraksi Volume Pasir Terhadap Kekuatan Bending, Densitas Dan Porositas Keramik Berbahan Dasar Tanah Liat Bachtiar, Iyas Muzalif; Sudarsono, Sudarsono; Kadir, Abd .
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 4, No 3 (2019): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

The purpose of this study was to determine the effect of adding clay-based ceramic material sand to physical strength using bending, density, and porosity testing methods. In this study using clay and sand with a volume fraction of clay: sand ie 90:10 %, 80:20 %, 70:30 %, 60: 40 % and 50:50 % printed using mold rectangular size 50 mm long, 8 mm wide and 7 mm thick, then the compaction process is carried out with a pressure of 175 kgf/cm2 or 2500 psi, then the sintering process is carried out at a temperature of 800 OC for 1 hour. The tests carried out are density, porosity and bending tests. The results showed that the density value of the volume fraction of 80:20 % obtained the highest average density value of 0.513 gr/cm³, and the volume fraction of 50:50 % obtained the lowest average density value of 0.458 gr/cm³. In porosity testing with a volume fraction of 50: 50 %, the highest porosity value was 67.619 %, and the volume fraction of 80:20 % obtained the lowest porosity value of 44.381 %. And for bending testing, the effect of volume fraction on bending strength obtained the highest bending strength value of 0.516 N/mm² for the volume fraction of 80: 20 % and the lowest bending strength value obtained with a value of 0.075 N/mm² for 50: 50 % volume fraction.Keywords: Sintering, density, porosity, bending, ceramic

Pengaruh Media Perendaman Komposit Rami Poliester Terhadap Kekuatan Tarik dan Kekuatan Bending Fadli, La Ode Muammar; Sudarsono, Sudarsono; Imran, Al Ichlas
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 4, No 2 (2019): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

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 Kompaksi Terhadap Karakteristik Briket Kulit Buah Kakao dan Kulit Biji Jambu Mete Harlan, Harlan; Kadir, Abd .; Imran, Al Ichlas
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 5, No 1 (2020): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

With the increasing population, the need for fuel also increases so that otheralternative sources are needed. One of the renewable energy that needs attention to be developed is agricultural waste such as rice husks, coconut shells, cashew skins, sago fronds, cocoa shells, and other agricultural or plantation waste. This study aims to determine the characteristics of the cocoa pod briquettes and cashew nut shells. The method used in this research is to use variations in pressure at the time of printing, the pressure used is 50 kg/cm2, 100 kg/cm2 and 150 kg/cm2. The characteristics of the briquettes tested were density, moisture content, ash content, heating value and rate of combustion. The results showed that the highest density was 0.91 kg/cm3 with a pressure of 150 kg/cm2 , the highest water content value was 13.84 % with a pressure of 50 kg/cm2 , the highest ash content was 5.16 % at a pressure of 150 kg/cm2, the value of The highest heat is 6024.33 Cal/g with a pressure of 150 kg/cm2, and the longest burning rate is 44 minutes with a pressure of 150 kg/cm2. So it can be concluded that the higher the compacting pressure during printing, the higher the value of density, ash content, heating value, combustion rate and moisture content value are getting better.Keywords: Briquettes, compaction, cocoa skin, cashew seed skin

Pengaruh Variasi Komposisi Terhadap Karakteristik Briket Campuran Sekam Padi Dan Kulit Jambu Mete Manisi, La; Kadir, Kadir; Kadir, Abd .
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 4, No 2 (2019): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

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

Pengaruh Penggunaan Uap Kering Pada Proses Pirolisis Limbah Plastik R.Y.P, Lalu Junaedi; Sudia, Budiman; Samhuddin, Samhuddin
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 4, No 3 (2019): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Pyrolysis is a fascination process by increasing temperatures without or less oxygen. This research aims to compare the use of gas pressure and gas-burning temperatures that were hasyfish. In this study, the reabsorption of 500 gr in the druse variable of the interactive waste is the type of PET (Polyethylene) with two types of the pyrolysation of the pyrolysis without being dry and the pyrolysis is with the athletes. Research began in preparation for the preparation of the test, preparation of ryl, precursors and research with gas pyrolysis. Further conducted analysis for each product. The highest gas pressure has a pyrolysation trial with an average of 0,04125 MPa while for the pyrolysis, without either a 0,02375 MPa while the average gas of the highest gas air date on the test pyrolysis without a dry temperature at 971,5 °C whereas the water is called for the water of the process of the 962,75 °C.Keywords: Pyrolysis, plastic garbage, gas, and dry steam

Desain Dan Analisa Pembebanan Statik Terhadap Kekuatan Pelek Modifikasi Tipe Cast Wheel Pada Sepeda Motor Menggunakan Software Solidworks Muslimin, Muslimin; Gunawan, Yuspian; Sudia, Budiman
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 4, No 4 (2019): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

In the automotive world, there have been many accidents caused by plasticdeformed rims. The purpose of this study was to design and analyze static loading on the modified rim strength of the cast wheel type on a motorcycle. The analytical method used to analyze is by using Solidworks software, analysis of static loading simulation to be carried out with 3 variations of the rim model and 3 variations in the number of spokes (8, 6, and 4 spoke) at a speed of 70 km/hr. From the results of the simulation analysis, all modification of the cast wheel rim type was analyzed, obtained the value of the safety factor included in the safe to use category. Modified rim type cast wheel model A with the number of spoke 8 obtained the largest maximum voltage value that is equal to 1,372,E+09 N/mm2, while for the smallest maximum voltage value obtained on rim model C with the number of spoke 4 which is 7,863,E+08 N/mm2 .Keywords: Static Loading, rim modification, cast wheel, solidworks software

Perancangan dan Penguji Gasifikasi Kulit Mente dan Sekam Padi Sebagai Sumber Energi Alternatif Harlan, Harlan; Mangalla, Lukas Kano
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 5, No 1 (2020): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

The purpose of this study is to make an updraft gasification design for a mixture ofthe composition of a mixture of cashew shell and rice husk that produces an optimalgas material, the method used is to make a direct manufacture of an updraft typegasification reactor and to take temperature measurements for each of thespecified compositions. The results showed that the design of the updraftgasification device for cashew skin and rice husk functioned well, because of thegasification process carried out by the two fuels used to produce flammable gas.The best mixture composition is a mixture of 500 grams of rice husk and cashew skin 500 grams with a temperature of 450 ˚C cashew skin and rice husk that produces optimal gas. Generally, the fuel used produces in the 15-20 minutes.Keywords: Gasification reactor designer, Gasification; Alternative Energy

Studi Sifat Mekanis Biokomposit Serat Ijuk dan Serat Sabut Kelapa Untuk Aplikasi Helm Kendaraan Roda Dua Muradin, Muradin; Hasbi, Muhammad; Imran, Al Ichlas
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 4, No 2 (2019): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

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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Jl. H.E.A. Mokodompit Anduonohu

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Sulawesi tenggara

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Yuspian Gunawan

Contact Email yuspian.gunawan_ft@uho.ac.id

Phone +6281392700119

Journal Mail Official aminur@uho.ac.id

Editorial Address Jl. H.E.A. Mokodompit Anduonohu

Location Kota kendari, Sulawesi tenggara INDONESIA

Abstract

Abstract

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Contact Name
Yuspian Gunawan

Contact Email
yuspian.gunawan_ft@uho.ac.id

Phone
+6281392700119

Journal Mail Official
aminur@uho.ac.id

Editorial Address
Jl. H.E.A. Mokodompit Anduonohu

Location
Kota kendari,

Sulawesi tenggara

INDONESIA