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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 Penambahan Fly Ash dan Serbuk Kaca Terhadap Sifat Fisik dan Mekanik Komposit Batako Husain, La Ode; Endriatno, Nanang; Aminur, Aminur
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 5, No 4 (2020): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Composite is a new material engineered by two or more materials where the properties of the materials differ from one another both in chemical and physical properties. Composites are obtained from a combination of metal with ceramics, metal with plastics, and others. The purpose of this study was to determine the effect of adding fly ash and glass powder on the physical and mechanical properties of brick-based composites. The drying process is carried out for 28 days. The compressive strength and water absorption tests were carried out after the drying process. The results showed the highest compressive strength value is on the B sample is 74.17 kg / cm2 and water uptake is lowest in the sample A, namely 10.53%. The highest compressive strength test results exist in the sample B is 74.17 kg / cm2 and the compressive strength is lowest in the sample A which is 66.67 kg / cm2. While the highest water absorption test results were in sample C, namely 15.05% and the lowest water absorption value was in sample A, namely 10.53%. Keywords: Brick-Based, fly ash, glass powder, compressive strength, water absorption.

Analisa Perbandingan BBM (Bahan Bakar Minyak) Dari Limbah Plastik Menggunakan Alat Pirolisis Pemanas LPG (Liquified Petroleum Gas) dan Listrik Rozikin, Miftachur; Balaka, Ridway; Hasbi, Muhammad
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 5, No 3 (2020): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

The purpose of this research is to know the comparison of fuel (oil fuel) pyrolysis results using LPG heaters (Liquid Petroleum Gas) and electricity. In this study using two pyrolysis tools, namely pyrolysis tools using gas and electrical heaters. Materials used are plastic garbage types of HDPE, LDPE and PP as much as 500 grams. The results of this study showed the value of the density of pyrolysis tools using gas heaters of 790.6 Kg/m³ for HDPE plastic, 722.0 Kg/m³ for LDPE Plastics and 738.7 Kg/m³ for PP Plastics. As for the viscosity value of 0.7853 m²/s for HDPE plastic, 0.6771 m²/s for LDPE Plastics and 0.6159 m²/s for PP Plastics. For the value of density by using the electrical pyrolysis tools are 771.4 Kg/m³ for HDPE plastic, 743.1 Kg/m³ for LDPE Plastics and 768.3 Kg/m³ for PP Plastics. While the viscosity value is obtained at 0.7198 m²/s for HDPE plastic, 0.7613 m²/s for LDPE and 0.7054 m²/s for PP plastic. Keywords: Pyrolysis, comparison of pyrolysis tools, plastics

Studi Penurunan Tekanan Akibat Aliran Melalui Katup Arfan, Arfan; Salimin, Salimin; Imran, Al Ichlas
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 5, No 3 (2020): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

The purpose of this study was to determine the effect of flow rate (Q) on pressure drop (ΔP) and to find out how much pressure drop value (ΔP) and loss coefficient (k) occurred in valves. The method used is an experimental study, using a series of test installations. In this study the free variables used were the flow rate that passes through the valve pipe, for bound variables are reynolds number (Re), loss coefficient (K) and pressure decrease (ΔP). Based on the results of the study, it can be concluded that the greater the discharge of outflow (Q) the smaller the value of pressure reduction (ΔP) that occurs, and vice versa. The pressure drop value (ΔP) obtained at the valve opening was 16.6% for each point of ΔP1-2, ΔP1-3, ΔP1-4, ΔP1-5 of 18846.1 Pa; 19129.2 Pa; 20506.1 Pa; 20897.0 Pa. While the amount of friction coefficient value (hf) obtained at the valve opening is 99.6% for each point hf2, hf3, hf4, hf5 which is 0.188 mH2O; 0.263 mH2O; 0.338 mH2O; 0.414 mH2O. Keywords: Valve, Discharge, Head Loss, Pressure Drop

Analisis CPO, Asam Fosfat dan Soda Api Sebagai Pengganti Bahan Bakar Minyak (BBM) Mesin Diesel Dengan Variasi Campuran 98%, 1%, 1% Dan 95%, 2%, 3%, dan 95%, 3% 2% Mengunakan Pengujian Kalor Putra, Muhlas Adi; Gunawan, Yuspian; Hasanudin, La
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 5, No 4 (2020): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Energy needs continue to grow as the industry develops and the world's population grows. The growing need for fuel oil is causing fewer crude inventories. So we did research on Cpo Analysis, Phosphoric Acid And Fire Soda In Lieu of Fuel Oil (Fuel) Diesel Engines With Mixed Variations 98%, 1%, 1% And 95%, 2%, 3%, And 95%, 3% 2% Using Calorific Testing. Go to this study to find out the calorific value and combustion rate of the biodiesel ed. The results of the study in three biodiesel experiments that were most effective for use were shown in the trial to three CPO 95%, 3% posephuric acid and 2% fire soda with a combustion rate of 0.309 gr/min within 30.42 minutes with a final temperature of 57oC. In the three most effective biodiesel experiments to use, three CPO 95%, 3% asamposfat and 2% soda api witha calorific value of 8208.39 cal/gr with a final temperature of 57oC. In the manufacture of biodiesel that affects from the mixture of chemicals as much as soda fire will be better and the less phosphoric acid it will be good. Keywords: Biodiesel, Calorific Value, and Combustion Rate

Perbandingan Kuat Tekan Paving Blok Berbahan Slag Nikel dengan Penambahan Berbagai Jenis Limbah Plastik Husein, Laode Muhamad Syawal; Gunawan, Yuspian; Kadir, Abd
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 5, No 3 (2020): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Indonesia's economic development is currently heavily dependent on the industrial sector which continues to experience rapid development. One of the growing industrial areas is the construction industry, especially infrastructure and property development that requires materials such as block paving. The purpose of this research is to find out the comparison of strong press paving blocks with the addition of nickel slag and plastic cacahan (PET, HDPE, LDPE and PP). This research uses conventional (manual) randomized methods. The results of this study showed that the influence of the addition of nickel slag and plastic cacahan in the manufacture of paving blocks against strong press can be concluded that the addition of nickel and plastic slag with strong characteristics can increase the strength of paving block press. The highest average press strength values were in Sample C samples, with mixed variations (cement 25%, coarse aggregate 5%, slag 25%, fine aggregate 5% and HDPE plastic cacahan 40%). has a press force of 155 kg/cm2 with a quality of C based on SNI 03-0691-1996. The lowest press test results were found in sample E (cement 25%, coarse aggregate 5%, slag 25%, fine aggregate 5% and plastic cacahan PP 40%) with a press test value of 87.5 kg/cm2 with a quality of D based on SNI 03-0691-1996. Keywords: Paving block, Plastic Type, Strong Press

Analisis Pengaruh Nilai Kalor Batubara Dan Excess Air Terhadap Efisiensi Boiler Di Pembangkit Listrik Pltu Moramo Putra, Bima Rangga; Mangalla, Lukas Kano; Gunawan, Yuspian
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 1 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Boiler is the most important part of a steam power plant. In this analysis, a water pipe tipe boiler is used which is operated at PLTU Moramo. The purpose of this study was to analyze the effect of the calorific value of coal fuel and excess air on the efficiency of a pulverizer coal boiler with a capacity of 230 T/H at PLTU Moramo. The research was carried out by taking parameter data that was read in the PIMS application at DCS, certificates of coal analysis results, and daily reports from the operations division. The data that has been obtained is then used to calculate enthalpy, LHV, efficiency, and excess air. The results show that the efficiency of the calculation on the data obtained, the efficiency of the use of coal shipment 1912028 with an LHV value of 23.916.31 kJ/Kg which has an efficiency of 65.54% higher than coal shipment 2009075 with an LHV value of 23,183.90 kJ/Kg which has an efficiency of 62.98%. At the highest boiler efficiency of 65.54% achieved at 29.07% excess air.Keywords: PLTU, LHV, boiler efficiency, Excess air, Coal heat

Analisis Pengaruh Fouling dan Slagging Terhadap Kinerja Boiler Subcritical pada PLTU Moramo Inaswara, Fadhilla; Sudia, Budiman; Sisworo, Raden Rinova
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

Analisis Pengaruh Perubahan Tekanan Vakum Kondensor Terhadap Heat Rate Turbin Di PLTU Moramo Sebelum dan Sesudah Perawatan Saputro, Bagus Andi; Sudia, Budiman; 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

PLTU Moramo is one of the Independent Power Producers (IPP) that supplies electricity to PT PLN. PLTU Moramo make use of turbine-generator with an installed capacity of 2x50 MW Steam Turbine - Full Condensing. PLTU Moramo Unit 1 experienced an increase in the condenser vacuum value after routine maintenance, the increase in the vacuum value affected to the heat rate and efficiency of the steam turbine cycle. The research conducted is to analyzes the effect of changes in the value of the condenser vacuum on the heat rate and efficiency of the steam turbine cycle by using a thermodynamic analysis approach and energy input-output methods. Data analysis uses actual parameters taken from the Distributed Control System (DCS) during normal operation. The results obtained in this study indicate that an increase in the condenser vacuum value affects the heat rate and efficiency of the steam turbine cycle, an increase in the vacuum value of -1 kPa results in a decrease in the average turbine heat rate of 57,673 kJ/kWh for a load of 40 MW Net and 93,575 kJ/ kWh for 50 MW Net load. Meanwhile, the average value of the steam turbine cycle efficiency increased by 0.37% for a load of 40 MW Net and 2.19% for 50 MW Net. Keywords: heat rate, efficiency, PLTU, vacuum

Pengaruh Kemiringan Kolektor Menggunakan Adsorben Arang Aktif Terhadap Efisiensi Kolektor Surya Pada Proses Adsorpsi Mesin Pendingin Amelia, Septiyan Nur; Sudarsono, Sudarsono; Hasbi, Muhammad
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 Faisal, Muhammad; Endriatno, Nanang; 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

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

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Yuspian Gunawan

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+6281392700119

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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

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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