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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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Analisa Pengaruh Variasi Tekanan dan Jarak Semprot Nozzle Terhadap Daya Output Pada Instalasi Turbin Pelton Yusuf, Muhammad Ridwan; Hasbi, Muhammad; Samhuddin, Samhuddin
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 4, No 1 (2019): Enthalpy-Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

This study aims to examine Pelton Turbines for Micro Hydro Power Plant Systems (PLTMH) with pressure variations and spray nozzle distances to output power in pelton turbine installations, in pressure variations namely pressure 0.5, 1, 1.5, 2 and 2.5 bar and variations the spray nozzle distance is 6, 9 and 12 cm. The tested turbine has a single nozzle, with a nozzle diameter of d = 10 mm, the number of blades Z = 14 pieces and a diameter of a turbine of 14 cm. The research began with the design, manufacturer of Pelton turbine installations and electrical installations. The parameters measured in the test are flowrate, pressure on the nozzle, turbine rotation, electric voltage and current, temperature and diameter of the working fluid. The results obtained the highest output power at a spray distance of 6 cm Nozzle and 2.5 bar pressure of 110.14 Watts with 88.11% Turbine Efficiency while the lowest Output power was obtained at a spray distance of 12 cm and a pressure of 0.5 bar of 17.07 Watts with a Turbine Efficiency of 51.2%.Keywords: Pelton Turbine, Output Power, Turbine Efficiency, Pressure Variation and Nozzle Spraydistance.

PEMBUATAN MATERIAL KOMPOSIT RESIN POLIESTER YANG DIPADUKAN LIMBAH KERTAS DAN ABU SEKAM PADI SEBAGAI PEREDAM AKUSTIK Isran, Isran; Kadir, Abd; Hasanudin, La
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 3, No 2 (2018): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Noise pollution from noise is a kind of unwanted pollution.This noise can be reduced by using an acoustic damper. This study aims to find out the technique of making polyester resin material mixed with waste paperand rice husk ash as an acoustic damper. The composite made then tested the value of sound absorption coefficient (????), composite damping test is done on kundst tube impedance tool equipped with spekerr device, amplifer, power supllay, lettop, smartphone, oscilloscope, sound lever meter with input frequency 400,600,800 Hz. The composite making method used by determining the volume fraction in composite damping test of Noise Absorption Coefficient (NAC) properties comprising Resin polyster : 50% paper waste : 20% and rice husk ash: 30%, Resin polyster 50% paper waste: 30% and rice husk ash: 20%, Resin polyster : 50% paper waste: 40% and rice husk ash : 10%. The result of all polyester resin composite test specimens in paper waste and rice husk ash reinfercement have the highest absorption coefficient 0,47857????????) at fractoin of 50%:30%:20% volume with frequency of 800 Hz. While for the lowest sound absorption result 0,475819 (????) with volume fraction of 50%:30%:20% with frequency 400 Hz. The overall specimencan be made as a damper because it has a sound absorption coefficient value >0.3.Keyword: Composite, paper waste, rice husk ash and NAC

PENGARUH VARIASI KOMPOSISI KOMPOSIT BERBAHAN GYPSUM, SERAT IJUK POHON AREN DAN RESIN POLYESTER TERHADAP KEMAMPUAN MEREDAM SUARA Idris, Idris; Mangalla, Lukas Kano; Sudia, Budiman
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 3, No 2 (2018): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Sound pollution from noise is a classic problem in Indonesia. This noise can be reduced by using an acoustic damper. The composite material made from coconut fiber and matrix is an alternative to environmentallyfriendly acoustic damper material because it utilizes agricultural waste material. this research has been made of fiberr matrix composite, gypsum powder with polyester resin. To increase the strength of coconutfiber first soaked in 2% NaOH solution for 1 hour. The composites are then tested for the value of the sound absorption coefficient (????), the composite damping test is performed on the kundts tube impedance tool in the speaker, amplifier, power supplay, laptop/smartphone, oscilloscope, sound lever meter with input frequency 600,800,1000 Hz. The test result of the value of Noice Absorption Coefficient (NAC) of all specimens of polyester resin composite test in fiber reinforcement fiber and gypsum powder has the highest absorption coefficient (????)=0.358316 at 30: 20: 50% fiber fraction with 1000 Hz frequency. As for the lowest sound absorption results (????)=0.351631 with fiber volume fraction 20: 30: 50% with a frequency of 600 Hz. In the general whole specimens can be made as a damper because it has a value of sound absorption coefficient >0,3.Keywords: composite, gypsum, fibers, polyester and NAC.

Penelitian Kerugian Energi Pada Sistem Exhaust Manifolds Instalasi Pipa Air Bersih Djalil, Muh. Afdal; Salimin, Salimin; Sudia, Budiman
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 is to determine the energy losses in the piping installation with the exhaust manifolds installation model in the clean water system. There is a research objective of this piping system to determine the effect of water discharge (Q) on head losses (Re) and the Reynolds number (Re) variation on loss coefficient (K), and know how much the value of water discharge (Q), head losses (h) and coefficient of loss (K), and the flow characteristics of the exhaust manifold system. In this study, the test material used is PVC pipe size 0.0127 m .and variations of testing of exhaust manifolds installation 35 cm-55 cm, each branch to determine the pressure on the measuring instrument manometer.Keywords: Energy, losses, pipe, water

Analisa Sifat Mekanik Resin Dengan Variasi Komposisi Hardener Sughiandi, Rachmad; Sudarsono, Sudarsono; Endriatno, Nanang
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 4, No 4 (2019): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

The purpose of this research is to find out the ideal mixture composition in theprocess of making polyester in thermoset polymers, where the composition of this mixture will have high tensile strength and bending strength. This thermosetpolymer is made by mixing polyester resin with hardener, varying between 1 %, 2 %, 4 %, and 7 %. Polyester resins that have been mixed with hardener are poured into the mold. After drying, the polymer is input into the mold to be pressed and curing. After drying, a tensile test specimen and bending test are made. Tensile testing is carried out using the ASTM D 638-02 type 4 standard, and bending testing is carried out with ASTM D709-02 type 4 standard. From the results of testing the tensile strength and bending strength obtained the maximum strength found in the mixture composition of 93:7 % with a value of 30.69 N/mm2 and 70.634 N/mm2 respectively.Keywords: Resin, hardener, tensile strength, bending, polymer

Perencanaan Dan Analisa Sudu-Sudu Terhadap Daya Turbin Angin Horizontal Type Multiblade Syawaluddin, Syawaluddin; Kadir, Kadir; Salimin, Salimin
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 4, No 4 (2019): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

The purpose of the study was to design and analyze the influence of the number of Sudu on power and the resulting rounds of turbines. This research is done byexperimental methods of designing, making prototypes and testing. The models of wind turbines used are horizontal shaft wind turbines with a diameter of 30 cm with a number of 3, 4, 5, 6 Sudu. Variations in wind speed were given 3 m/s, 3.8 m/s and 4.6 m/s. The results showed that the highest value of 3.08% in the 6-Sudu wind turbinewith a wind speed given 4.6 m/s, whereas for the lowest value obtained 1.45% in a 3 sudu wind turbine with the given speed of wind 3 m/s. For a tip-speed value of λ =3.19 at wind speed of 4.6 m/s with a 6-Sudu turbine amount, while the lowest value of λ = 0.95 at wind speed of 3 m/s with a total of 3-Sudu turbine. Keywords: Design, turbine, ratio, sudu and power

Desain dan Analisa Pembakaran Kompor Briket Biomassa Ramadhan, Ramadhan; Kadir, Kadir; Hasanudin, La
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 5, No 1 (2020): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

The furnace is a device used to convert potential energy into heat energy. Furnace for the community is one of the important tools for cooking. Combustion is the reaction of a substance with oxygen (O2 ). Combustion is one of the most widely used biomass energy conversions because it produces direct thermal energy. The purpose of this research is to analyze the number of holes and analyze the comparison of burning briquette stoves with kerosene stoves. The data collection method is carried out by direct observation of the community and collecting references from related books and journals. Analysis conducted on the number of holes in the briquette stove (21, 33 and 43) shows the most effective results in the use of briquette stoves are briquette stoves which have 43 holes. The time to heat the water is 15 minutes with the same amount of water and fuel volume, the water volume is 500 ml and 600 grams of fuel and the final temperature is 100 oC. The heating time of kerosene stove is 12 minutes and the heating time of briquette stove is 15 minutes.Keywords: Briquette stove, hole variation, design, combustion, efficiency

Analisa Sifat Mekanik Komposit Serat Gelas Pada Lapisan Yang Berbeda Setiawan, Andi Tri; Salimin, Salimin; Endriatno, Nanang
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 4, No 2 (2019): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Nowadays, fiberglass composites are widely applied to the construction that receives tension and bending loads. The purpose of this research is to know and analyze the mechanical properties of fiberglass by using different layers. In this research the manufacture of composites using hand-lay-up method. The manufacture of specimen for the tensile test refers to the standard ASTM D 638-02 and standard ASTM D 790-02 bending test. The method used in data analysis is graph data analysis to see the relationship between interconnected parameters and dependence on the size of the specimen 13 mm and the number of variations in the composition of the specimen mixture. The results showed that the composition of the mixture with the highest tensile voltage of 60.2719 N/mm2 was in the variation of 5 layers and the bending test with a value of 116.93 N/mm2. While the lowest tensile strength is 33.2882 N/mm2 and the lowest bending of 100.84 N/mm2 is found in the composition of variation 2 layers.Keywords: composite, fiberglass, polyester resin

Pengujian Eksperimental Panas Yang Timbul Akibat Gesekan Pada Kampas Rem Cakram Komposit Berbahan Serat Rami Dan Serbuk Arang Tempurung Kelapa Dengan Perekat Resin Epoksi Kusmardin, Kusmardin; Mangalla, Lukas Kano; 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

The purpose of this study was to determine the heat that builds up and the rate of abrasion due to friction on the brake discs made of fiber composite jute, coconut shell with an epoxy resin adhesive. The tools used in this study are digital thermometer, abrasion, stopwatch, thermometer, digital scales while the materials used are ramie fibers, coconut shell charcoal, and epoxy resin. Comparison of a mixture of ramie fiber, coconut shell powder, and epoxy resin namely for canvas 1 (30:30:40 %), canvas 2 (20:40:40 %), and (40:20:40 %). The lowest abrasion rate value in the 3rd sample with a composition (40 % ramie fiber, coconut shell charcoal powder 20 %, and 40 % epoxy resin) is 0,00071 gr/ s, the thermal conductivity value of the material drops at 30 % ramie content and increases in the 40 % content of ramie.Keywords: brake lining, abrasion rate, thermal conductivity, ramie and epoxy

Karakteristik Kekuatan Tarik Pada Komposit Hybrid, Serat Rami, Fiberglass, Dan Resin Polyester Sarudin, Sarudin; Sudarsono, Sudarsono; Gunawan, Yuspian
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 4, No 4 (2019): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

The purpose of this research is to know and analyze the characteristics of tensile strength on hybrid composite, fiberglass, flax fiber, and polyester resin. In this research, the manufacturing of composites uses hand lay-up method. Manufacture of specimens in accordance with ASTM standard D638 – 02 and for tensile testing using standard ASTM D790-02. The method used in data analysis is graph data analysis to see the relationship between interconnected parameters and dependence, which is the size of the specimen 13 mm and the number of variations in the composition of specimen mixture. The results showed that the composition of the mixture that has the highest tensile voltage is in the fraction with the composition of resin mixing 50%, fiberglass 30%, and hemp fiber 20% in three (3) specimen with a value of 36,687 N/mm2, while the Has a value with the lowest chart found in the composition with a resin mixing 50%, and hemp fiber 50%, namely in the two (2) specimen with a value of 21,819 N/mm2. Keyword: Composite hybrid, hemp fiber, fiberglass, polyester resin.

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Jl. H.E.A. Mokodompit Anduonohu

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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