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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 8 Documents

Search results for , issue "Vol 6, No 2 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin" : 8 Documents clear

Analisis Pengaruh Fouling dan Slagging Terhadap Kinerja Boiler Subcritical pada PLTU Moramo Fadhilla Inaswara; Budiman Sudia; Raden Rinova Sisworo
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 2 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Boilers that use low-quality coal result in an increase in the amount of coal burning and the high formation of accumulated ash deposits (fouling and salgging). It is necessary to conduct research the effect of fouling and slagging on boiler efficiency in steam power plant Moramo for the boiler performance improvement purpose. The objective of this research are identified fouling and slagging and how its affect boiler performance. By using the principle of mass and energy balance, heat transfer in the evaporator and superheater areas are used as the basis for identifying slagging and fouling. Boiler efficiency is calculated by a direct method. An increase in flue gas temperature which is affected by a degradation in the rate of heat transfer indicates the formation of slagging and fouling. Boiler efficiency is related to the slagging index and sodium content in the ash of coal, the result of higher slagging index and lower the sodium content will further increase boiler efficiency. The best average efficiency of boiler is 89.853% when coal from supplier Y used as fuel with slagging index value is 2370.2 and sodium content in ash is 0.48%..Keyword: Fouling, slagging, heat transfer, efficiency, boiler

Pengaruh Kemiringan Kolektor Menggunakan Adsorben Arang Aktif Terhadap Efisiensi Kolektor Surya Pada Proses Adsorpsi Mesin Pendingin Septiyan Nur Amelia; Sudarsono Sudarsono; Muhammad Hasbi
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 2 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Indonesia has abundant sources of solar energy with an average solar radiation intensity of about 4.8 kWh/m2 per day throughout Indonesia because it is located at the equator 6°N to 11°N and 9°E-141°E. That way the sun's energy that is not used up can be utilized. The purpose of this study is to determine the heat used by the collector for the desorption process and to determine the effect of variations in the angle of inclination of the collector on the efficiency of the collector. That way, one of them can be used for the water cooling process using a solar collector device on a solar heat adsorption cycle cooling machine The purpose of this study was to determine the heat used by the collector for the desorption process and to determine the effect of variations in the collector tilt angle on the efficiency of the collector. This research was conducted by varying the slope of the cooling machine collector with an adsorption cycle using solar energy. The test results show that the average theoretical useful heat at the collector (Qu) obtained by the 0° angle collector is 236,079 Watt, the 15° angle collector (from 08.00 – 15.30) is 131.683 Watt, and the 30° angle collector (from 08.00 – 16.00) is 179.638 Watt. on each test day. The average efficiency (η) from 08.00 – 15.30 (optimal measurement) obtained by the 0° angle collector is 51.296%, the 15° collector angle is 47.1%, and for the 30° angle collector the average efficiency is from 08.00 – 16.00 (optimal measurement) of 52.836%.Keywords: collector, adsorption, temperature.

Analisa Getaran Pada Balok Jepit Bebas dan Jepit-Jepit dengan Variasi Posisi Motor Penggetar Muhammad Faisal; Nanang Endriatno; Budiman Sudia
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 2 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

This study aims to determine the difference in vibration produced when the position of the vibration source is placed in a different position on the cantilever beam which is supported by fixed-fixed and free-fixed supports. This research used 6061 series aluminum beam with a size of 32 mm x 32 mm x 600 mm. Variations the placement of the exciter of fixed-fixed beams was in the 15 cm, 30 cm, and 45 cm positions, while the fixed-free beams was in the 10 cm, 20 cm, 30 cm, 40 cm, and 50 cm positions. The results of the research on fixed-fixed beams showed that the maximum displacement value was at a position of 30 cm with a value of 0.097 mm, the minimum displacement at 45 cm with a value of 0.04 mm. The maximum velocity value was at a position of 15 cm with a value of 0.653 cm/s, the minimum velocity was at a position of 45 cm with a value of 0.397 cm/s. The maximum acceleration value was at a position of 15 cm with a value of 12.16 m/s², the minimum acceleration was at a position of 45 cm with a value of 8.33 m/s². While the fixed-free beam showed that the maximum displacement value was at a position of 50 cm with a value of 0.197 mm, the minimum displacement at a position of 10 cm with a value of 0.097 mm. The maximum velocity value was at a position of 30 cm with a value of 1.138 cm/s, the minimum velocity at a position of 10 cm with a value of 0.670 cm/s. The maximum acceleration value was at a position of 30 cm with a value of 21,833 m/s², the minimum acceleration was at a position of 10 cm with a value of 9.95 m/s².Keywords: vibration, displacement, velocity, acceleration, aluminum

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; Abd. Kadir; 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

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.

Analisis Pengaruh Arus Pengelasan Dan Jenis Elektroda Pada Struktur Mikro Material Baja Karbon Rendah Darsono Darsono; Muhammad Hasbi; Prinob Aksar
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 2 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

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 La Ode Usman; Ridway Balaka; Al Ichlas Imran
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 2 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

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.

Analisis Pengaruh Penggunaan Aluminium Foil Pada Dinding Mesin Penetas Telur Terhadap Daya Tetas Yang Dihasilkan Tri Agusti; Yuspian Gunawan; Budiman Sudia
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 2 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

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)

EnergyÂ needsÂ inÂ IndonesiaÂ continueÂ toÂ increaseÂ everyÂ year.Â TheÂ largestÂ useÂ of energyÂ isÂ inÂ theÂ industrialÂ sector,Â whereÂ itsÂ needsÂ reachÂ 42.12%Â ofÂ theÂ 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 conductedÂ researchÂ onÂ theÂ performanceÂ ofÂ theÂ evaporatorÂ inÂ aÂ refrigeration machineÂ withÂ anÂ adsorptionÂ cycleÂ usingÂ solarÂ energy.Â TheÂ purposeÂ ofÂ thisÂ study wasÂ toÂ determineÂ theÂ workingÂ processÂ ofÂ theÂ evaporatorÂ withÂ activatedÂ carbon refrigerationÂ andÂ toÂ determineÂ theÂ efficiencyÂ ofÂ theÂ evaporatorÂ inÂ theÂ activated carbonÂ pairÂ adsorptionÂ refrigerationÂ system.Â ThisÂ researchÂ wasÂ conductedÂ 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,Â whichÂ wasÂ 32.2Â oCÂ andÂ theÂ lowestÂ evaporatorÂ temperatureÂ wasÂ atÂ 07.00, whichÂ wasÂ 23.8Â oC.Â OnÂ theÂ thirdÂ day,Â theÂ highestÂ increaseÂ inÂ evaporator temperature was at 36.4 oC and the lowest evaporator temperature was at 06.00, which was 24.5 oC.Â Kata kunci: Adsorption, evaporator, temperatureÂ

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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

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Abstract

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

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

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