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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 9 Documents

Search results for , issue "Vol 6, No 3 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin" : 9 Documents clear

Pengembangan Desain Kompor Gasifikasi Top Lith Up Draft (TLUD) Muhamad Ashar Syahrir; Lukas Kano Mangalla; Al Ichlas Imran
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 3 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

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 Wildan Muholad; Muhammad Hasbi; Nanang Endriatno
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 3 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

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 Hamzah Alfian; Sudarsono Sudarsono; Nanang Endriatno
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 3 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

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

Desain dan Analisa Tegangan Tarik Maksimum Dan Tegangan Tekan Maksimum Kait (Hook) Pada Overhead Crane Laode Rahman. R; Yuspian Gunawan; Prinob Aksar
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 3 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

In the industrial world there have been many innovations and creations aimed at improving the quality and quantity of production. In industrial and construction activities, there are usually material or material loads that cannot be lifted using human power. For industry, there is a lifting device called a crane. Cranes have a main component called a hook which is used to help lift the load by being hooked. Hooks that are designed incorrectly will be dangerous when used, so it is necessary to check the stress through theoretical analysis calculations or by simulation using Autodesk Inventor to evaluate the construction through the safety factor and Von Misses stress analysis so that the construction made on the hook does not experience failure. The results of theoretical analysis and simulation results using Autodesk Inventor 2017 software on a hook with a load of 3 Tons or 29.430 N can be concluded that the maximum compressive stress of cross section AB is 5.19 kg/ mm2 tensile stress of cross section AB is 15.40 kg/mm2 and on the CD cross section the maximum compressive stress is 4.97 kg/mm2 and the maximum tensile stress is 13.35 kg/mm2, the safety factor based on simulation is 15. It can be concluded that, the Hook which has been analyzed theoretically and simulation can be said to be able to accept a load of 3 tons.Keywords: Hook, overhead crane

Pengujian Water Hammer Pada Berbagai Berbagai Tekanan Hidrostatis Idul Idul; Lukas Kano Mangalla; La Ode Ahmad Barata
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 3 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Fluids are an important aspect of everyday life. A fluid is a substance that can flow. In the pipeline, the problem that often occurs is the occurrence of fluctuations in water pressure due to the sudden closure of the water flow. The purpose of this research is to study the effect of water hammer on pressure fluctuations at various heights, and to determine the phenomenon of water hammer on flow in pipes at various water surface elevations. The research method was carried out by testing the water hammer at hydrostatic pressure with a water level of 2.40 m, 2.60 m, and 2.80 m. The test is carried out in conditions just after the valve is closed. From the results obtained for the height of h 2.40 m, 2.60 m and 2.80 m have a discharge of 0.000543 m3/s, 0.000558 m3/s and 0.000568 m3/s. pressure fluctuations in the pipe for a height of 2.40 (m), with a duration of fluctuation of 12.48 (s), for a height of 2.60, (m) with a duration of fluctuation of 14.37 (s), and at a height of 2.80 (m) fluctuated by 17.56 (s). The higher the water level, the higher the fluctuations produced. The occurrence of altitude fluctuations is caused by the closing of the valve at the end of the pipe so that the water increases and after experiencing an increase there is a decrease in height until it is constant

Rancang Bangun Blade Turbin Angin Jenis Taper Untuk Pembangkit Listrik Tenaga Bayu Berskala Mikro La Ode Andi Kusmayanto; Ridway Balaka; Al Ichlas Imran
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 3 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

The ultization of renewable energy in Indonesian kept on doing as the increase of amount in energy electricity demand as well as environmentally friendly energy requerements, efficient and sustainable. This study aims to learn about the blade’s geometric shapes designed and crafted, as well as the blade’s performance. The study has bee succesfully designed and crafted as soon as tested by the blade’s for a low-scale wind turbine. The design blade’s geometry is a type of taper, is the Horizontal of Axis Wind Turbine type with airfoil NACA 6412. The blade was design with Qblade software and built with a manual engine. The method of data collection was the blade installed on the tower at 30 meters for three days. The energy generated on a daily basis that is the first day, the energy average production is 45,80 watts with an average wind speed of 4,54 m/s, the second day of 55,11 watts with and average wind speed of 5,23 m/s, and the third day of 72,27 watts with an average wind speed 5,14 m/s.Keywords:Airfoil, blade, energy, wind turbine

Karakteristik Tegangan dan Regangan Tarik Pada Komposit CFRP Yang Berlubang Muhammad Ikhsan; Sudarsono Sudarsono; Nanang Endriatno
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 3 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

In the industrial world, the development of material technology is growing rapidly. There is an increasing demand for materials with certain properties such as perforated composites. The consideration of perforated composites is an important parameter in the design of composite components. The purpose of this study was to determine the tensile stress and strain characteristics of hollow CFRP composites. The research method used is to analyze the tensile test using abaqus software, the tensile test analysis is carried out with 3 variations in the diameter of the hole (2 mm, 4 mm, and 6 mm). From the tensile test simulation results, it is found that the highest stress occurs in the 6 mm diameter composite with a maximum stress value of 180.4 N/mm², and the lowest stress occurs in the 2 mm diameter composite with a maximum stress value of 102.6 N/mm². The highest stress and strain that occurs in each specimen is located on the edge of the hole perpendicular to the direction of the force, the stress and strain increase based on the diameter of the hole in the composite, the larger the diameter in the composite, the greater the stress that occurs..Keywords: Tensile test, CFRP composite, abaqus software

Studi Kecepatan Spindel Mesin Bubut Terhadap Nilai Unit Horse Power (UHP) Pada Proses Pembubutan Baja Karbon Rendah Fahri Ari Saputra; Samhuddin Samhuddin; Aminur Aminur
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 3 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

The machining process is a manufacturing process where the main process is removing or removing some of the material from a basic material which can be in the form of a shaft so that it meets the desired shape and quality. The purpose of this study was to determine the effect of the rotational speed of the lathe spindle on the value of Unit Horse Power (UHP) in the low carbon steel turning process. The study used carbon steel material in the form of a cylinder with an initial diameter of 40 mm and a length of 150 mm. The cylindrical workpiece is turned with a depth of 1 mm at various speeds, namely 95 rpm, 130 rpm and 180 rpm. The results showed that the rotational speed of the lathe spindle affects the value of the unit horse power (UHP). The higher the spindle rotation of the lathe, the greater the UHP obtained, where the highest UHP occurs at 180 rpm with a UHP value of 0.00030 and the lowest UHP. found in round 130 with a UHP value of 0.00016. High rotation causes a large force so that the vibration of the lathe tool is even greater.Keywords: Lathe process, carbon steel, spindle rotation.

Analisis Pengaruh Nilai Beban Unit Terhadap Efisiensi dan Heat Rate Turbin Pada Pltu Moramo Muhammad Ilham; Salimin Salimin; Prinob Aksar
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 3 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Moramo steam power plant is one of steam power plant in Indonesia that using coal as it fuels with capacity of 2x50 MW. Power produced by Moramo steam power plant is not always in constant condition because of fluctuation power in distribution grid with corresponding of power demand. One of the main indicators of steam turbine performance is the efficiency of steam turbine cycle and turbine heat rate. This research conducted to analyzes the effect of changes in power produced by Moramo steam power plant on the efficiency and turbine heat rate using a thermodynamic analysis approach and energy input-output methods. Analyzed data in this research is actual data during normal operation that taken from Distributed Control System (DCS). Results of this research indicated that the more the power produced by Moramo steam power plant the better of performance of its steam turbine. It is showed by the increase of average efficiency from 39.138% on 30 MW Net load to 39.369 % on 40 MW Net load, and increase to 39.976 % on 50 MW Net load. Furthermore, the increase of performance also showed by the decrease of its average turbine heat rate from 10137.79 kJ/kWh on 30 MW Net load to 9633.95 kJ/kWh on 40 MW Net load, and decrease to 9333.77 kJ/kWh on 50 MW Net load.Keywords: Load, efficiency, heat rate, steam power plant, steam turbine

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Yuspian Gunawan

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yuspian.gunawan_ft@uho.ac.id

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+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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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

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