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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 191 Documents
 9   10   11   12   13 
Analisa Pengaruh Kuat Arus Terhadap Kekuatan Tarik Dan Bending Sambungan Las Kampuh V Menggunakan Las SMAW Dengan Elektroda E6013 Pada Pengelasan Baja Karbon Rendah Ridwan, Ridwan; Kadir, Abd.; Aminur, Aminur
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 2 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (437.266 KB) | DOI: 10.55679/enthalpy.v6i2.19373

Abstract

Strong current in welding is something that has always been a problem in the welding process. High currents can cause penetration of the welded material, whereas low currents can cause shallow penetration. The purpose of the study was to determine the effect of current on the tensile and bending strength of V seam welded joints using SMAW welding with E6013 electrodes on low carbon steel welding. The research method used is to make a seam on a steel plate with an angle of 60 degrees and then weld it with a different current. The current used is 70, 90, 110 amperes with an electrode diameter of 2.6 mm. The samples that have been welded are then formed into tensile and bending test specimens. The results showed that the highest average tensile stress was 518.310 MPa at a welding current of 110 amperes. The highest average tensile strain is 34.00% at a welding current of 70 amperes. The highest average elastic modulus is 0.01864 GPa at a welding current of 110 amperes. For bending testing at 70 amperes, the fb1 specimen has cracks in the weld metal area with a crack length of 1.00 mm and the fb2 specimen has 0.50 mm cracks, while the 90 amperes fb1 specimen has 1.00 mm cracks, and fb2 specimens have 0.50mm crack. Current 110 amperes fb1 specimen has a crack of 4.70 mm, and fb2 specimen has a crack of 3.00 mm. From the results of the study, a good welding current for a plate with a thickness of 7.5 mm with an E6013 electrode with a diameter of 2.6 mm is at a current of 90 amperes.
Analisa Kekuatan Tekan, Daya Serap Air Dan Densitas Pada Material Komposit Berbahan Dasar Fly Ash Batu Bara, Arang Sekam Padi Dan Plastik HDPE Irwan, Irwan; Mangalla, Lukas Kano; Kadir, Abd.
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 1 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (352.236 KB) | DOI: 10.55679/enthalpy.v6i1.19126

Abstract

Utilization of waste or garbage in Indonesia continues to be carried out in line with the increasing number of which is used as a filler material in making composites. This study aims to determine the effect of composite material composition made from fly ash coal, rice husk charcoal and HDPE plastic on compressive strength, water absorption and density of the material. This research was conducted as an experimental study that had been carried out by means of laboratory tests. The composition used was 30%: 5%: 65%, 25%: 10%: 65%, 20%: 15%: 65%. Specimens were made to ASTM D695 standards for press testing. The results of this study indicate that the value of the compressive strength obtained at the composition of 30%: 5%: 65% is equal to 1.96 N / mm2, the value of water absorption in the largest composite material is at the composition of 20%: 15%: 65%, which is equal to 2,0283%, as well as for the density value of the largest composite material at the composition of 30%: 5%: 65% which is equal to 1.4692 g / cm3.Keywords: Fly ash coal, rice husk charcoal, HDPE Plastic, press, water absorption, density
Analisis Pengaruh Arus Pengelasan Dan Jenis Elektroda Pada Struktur Mikro Material Baja Karbon Rendah Darsono, Darsono; Hasbi, Muhammad; Aksar, Prinob
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 2 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (462.742 KB) | DOI: 10.55679/enthalpy.v6i2.19132

Abstract

The purpose of this study was to determine the changes in the microstructure that occur in low carbon steel due to welding using the type of electrodes E6013 and E7016 with a diameter of 2.6 with a current of 60-110. This research was carried out by several processes, namely specimen making, testing process and data analysis. In the specimen test, the microstructure of medium carbon steel was observed in the base metal region, the HAZ metal region, and the weld metal region. Microstructure testing was carried out to see the occurrence of changes in the microstructure of the specimen as a result of the welding process and the test results obtained were in the form of microstructure images with 500x magnification. The results showed that the changes in the microstructure that occurred in the HAZ region. This is found in the type of electrode E6013 indicating the higher the current used, the finer the grain size of the resulting structure. Meanwhile, for the E7016 electrode, it is the opposite where the higher the current used, the coarser the grain size of the resulting structure. Keywords: HAZ area, microstructure, type of electrode
Rancang Bangun Bilah Taperless Jenis Horizontal Axis Wind Turbin Untuk PLTB 500 Watt Dengan Airfoil NACA 6412 Menggunakan Software Qblade Usman, La Ode; Balaka, Ridway; Imran, Al Ichlas
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 2 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (705.223 KB) | DOI: 10.55679/enthalpy.v6i2.19374

Abstract

Energy demand in Indonesia generally continues to increase due to population growth, one of the most widely used energies is wind energy. The research objectives are to determine the geometry of the blades, design and manufacture the blades suitable for use in moderate winds and to determine the power generated. The research started from determining the geometry of the blades for medium speed wind, then making the blades and then testing the blades. The geometry of the blades formed is tapertlles blades of the horizontal axis wind turbine type NACA 6412 airfaoil using Qblade software. The blade is designed with a blade radius of 0.774 m, the chord is 0.0999 m using mahogany wood material. The manufacturing method used is the manual method with the help of machine tools. The blades are tested for equilibrium, then mounted on the tower, 10 meters high to take the data. The test results show that the blades that have been made work well and produce an average power per second of 58.29 Watt, 90.82 Watt, and 102.00 Watt, for three days of testing.Keywords: Tuperless blades, airfoil naca 6412, qblade, horizontal axis wind turbines, mahogany wood.
Pengaruh Penambahan Slag Nikel Dan Cacahan Plastik Terhadap Kekuatan Tekan Paving Block Huzaifa, Huzaifa; Endriatno, Nanang; Kadir, Abd.
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 1 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (279.156 KB) | DOI: 10.55679/enthalpy.v6i1.19127

Abstract

This study aims to analyze the addition of nickel slag and crushed plastic into the paving block on the compressive strength. Paving blocks were made by conventional methods. Samples were made and tested according to SNI 03-0691-1996 standards. After molded, the paving blocks were dried within 28 days. After that, the materials were placed on a compression test device to determine the compressive strength. The results of the compression test showed that the maximum compressive strength value was owned by sample B with a value of 210.8 kg/cm2 with a volume composition of 25% cement, 5% coarse aggregate, 30% nickel slag, 5% fine aggregate, and 35% crushed plastic. The minimum compressive strength was found in sample A with a value of 129.17 kg/cm2 with a mixture composition of 25% cement, 25% coarse aggregate and 50% fine aggregate. From this study, it was found that there was an increase in the compressive strength of the paving block after the addition of chopped plastic and nickel slag.Keywords: paving block, slag nickel, plastic chopping, compressive strength
Analisis Pengaruh Penggunaan Aluminium Foil Pada Dinding Mesin Penetas Telur Terhadap Daya Tetas Yang Dihasilkan Agusti, Tri; Gunawan, Yuspian; Sudia, Budiman
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 2 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (402.567 KB) | DOI: 10.55679/enthalpy.v6i2.19134

Abstract

The hatching machine is one of the media in the form of a box with such a construction that the heat inside is not wasted. This incubator is equipped with supporting equipment to regulate environmental conditions similar to or similar to the broodstock. The purpose of this study is to determine the effect of the use of a layer of aluminum foil on the walls of the egg incubator on the resulting hatchability. This research was conducted by installing an incubator, then testing it using an incubator. Data were collected by measuring room temperature, room humidity, light on and off, and checking embryo development. The results showed that the egg incubator without aluminum foil layer began to hatch on the 20th day as many as 3 eggs, and on the 21st day as many as 4 eggs so that the eggs hatched were 7 out of 10 eggs and for the egg incubator with a layer aluminum foil hatched early on the 19th day as many as 2 eggs, on the 20th day as many as 3 eggs and on the 21st day as many as 4 eggs so that the eggs hatched were 9 eggs out of 10 eggs. The use of aluminum foil in the egg incubator affects the hatchability.Keywords: Egg incubator, aluminum foil coating, hatchability.
Unjuk Kerja Evaporator Pada Mesin Pendingin Dengan Siklus Adsorpsi Menggunakan Energi Surya Amusadar, Amusadar; Hasbi, Muhammad; Samhuddin, Samhuddin
ENTHALPY Vol 6, No 2 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : ENTHALPY

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (25.529 KB)

Abstract

Energy  needs  in  Indonesia  continue  to  increase  every  year.  The  largest  use  of energy  is  in  the  industrial  sector,  where  its  needs  reach  42.12%  of  the  total national energy needs. To save energy, energy saving measures are needed in the industrial sector so that the increase in energy demand can be restrained. So we conducted  research  on  the  performance  of  the  evaporator  in  a  refrigeration machine  with  an  adsorption  cycle  using  solar  energy.  The  purpose  of  this  study was  to  determine  the  working  process  of  the  evaporator  with  activated  carbon refrigeration  and  to  determine  the  efficiency  of  the  evaporator  in  the  activated carbon  pair  adsorption  refrigeration  system.  This  research  was  conducted  by observing and recording the evaporator temperature of the refrigeration machine every hour. The results of the research in three days of testing, namely, on the first day the highest evaporator temperature increase was at 16.00 o'clock, which was 33.2 oC and the lowest evaporator temperature was at 07.00 o'clock, which was 25.1 oC. On the second day, the highest increase in evaporator temperature was at 16.00,  which  was  32.2  oC  and  the  lowest  evaporator  temperature  was  at  07.00, which  was  23.8  oC.  On  the  third  day,  the  highest  increase  in  evaporator temperature was at 36.4 oC and the lowest evaporator temperature was at 06.00, which was 24.5 oC. Kata kunci: Adsorption, evaporator, temperature 
Pengembangan Desain Kompor Gasifikasi Top Lith Up Draft (TLUD) Syahrir, Muhamad Ashar; Mangalla, Lukas Kano; Imran, Al Ichlas
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 3 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (385.961 KB) | DOI: 10.55679/enthalpy.v6i3.20972

Abstract

The use of environmentally friendly stoves in the household sector can be an alternative to overcome the limited use of kerosene and the constrained supply of LPG. The purpose of the study was to develop a gasification stove design with the concept of Top Lith Up Draft on several variations of the column, namely without columns, column 2 holes and column 4 holes using cashew shell fuel which produces optimal gas fuel. The research method is the Top Lith Up Draft method, which is a gasification process semi-gasifier technology method that can produce fewer emissions that can harm human health. The results obtained indicate that the development of the TLUD gasification stove design from several variations of the column functions well. The gasification testing process carried out for the three variations of the column used resulted in good temperature values, namely for variations without a temperature column of 829 , column 2 holes of 935 , and column 4 holes of 934 . The best column variation is the 2 hole column with the highest temperature value of 935. Kata kunci: Gasification, TLUD, cashew shell,  efficiency.
Analisa Pengaruh Excess Air Terhadap Efisiensi Pembakaran Boiler Jenis Pulverizer Coal 230 T/H Muholad, Wildan; Hasbi, Muhammad; Endriatno, Nanang
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 3 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (571.264 KB) | DOI: 10.55679/enthalpy.v6i3.20979

Abstract

To save on coal consumption in PLTU (Steam Power Plant), it is necessary to increase boiler efficiency. The factors that can affect boiler efficiency include: flue gas temperature, fuel specification, excess air, ambient temperature, radiation and convection losses. By changing the value of excess air in this case the percentage of oxygen (4% to 4.5%) will affect the efficiency of the boiler. Changing the value of excess air also results in a change in the electrical power used by the auxiliary system in the boiler. Calculation of boiler efficiency with the direct method by testing 2 times on each oxygen percentage value of 4% and 4.5. Efficiency increased 0.94%, from 80.76% to 81.7% in test 1 and increased 1.02%, from 90.81% to 91.83% in test II. The power usage increased by 27.959 Kw in the 1st test and increased to 26.663 Kw in the test II.Kata kunci: Boiler, efficiency, excess air, PLTU
Pengaruh Pola Susunan Laminasi Terhadap Distribusi Tegangan Dan Regangan Tarik Pada Komposit CFRP Yang Berlubang Alfian, Hamzah; Sudarsono, Sudarsono; Endriatno, Nanang
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 3 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (607.389 KB) | DOI: 10.55679/enthalpy.v6i3.20973

Abstract

The development of material technology is growing rapidly, especially in the manufacturing industry. One of the materials that are most often used and developed today is composite materials. The purpose of this study was to determine the effect of the pattern of laminate arrangement on the distribution of stress and tensile strain in perforated CFRP composites. The research method carried out is tensile testing using abaqus software, the specimen is designed with 8 laminates and the fiber direction is varied. The specimens were made with the ASTM D 5766 test standard and the properties used were carbon fiber composite type T800S/3900-2B. From the tensile test simulation results, it is found that the highest stress value in the composite with variations in fiber direction 0°, 45°, -45°, 90°, 90°, -45°, 45°, 0° the maximum stress value reaches 356.9 N/ mm², while the smallest stress occurs in the composite fiber direction 0°, 0°, 0°, 0°, 0°, 0°, 0°, 0° with the maximum stress value reaching 165.7 N/mm. The highest stress and strain that occurs in each specimen is located at the edge of the hole perpendicular to the direction of the force, the stress and strain increase based on variations in the direction of the fiber in the composite, the farther the orientation of the fiber direction to the direction of the applied force, the greater the stress concentration that occurs also.Keywords: Tensile test, CFRP composite, abaqus software

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