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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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Analisis Pengaruh Penambahan Kawat Tembaga Terhadap Kompor Minyak Jelantah dengan Campuran Minyak Tanah Asmin, Asmin; Sudia, Budiman; Samhuddin, Samhuddin
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 4 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

The stove is a fire-producing device to heat an object. Heating solid objects can be done directly on the fire or indirectly on the fire or indirectly by using the media stove. The purpose of this study was to determine the effect of adding copper wire to the stove wick on the performance of a used cooking oil stove with a mixture of kerosene. This research procedure is divided into several stages, namely first assembling the used cooking oil stove wick, then testing the results of the effect of adding copper wire to the used cooking oil stove wick with a mixture of kerosene. From the results of tests carried out from the results of data analysis, namely the addition of each copper wire the average temperature is always changing as well as the time. In this study, a good average temperature or it could be said that the temperature increased, namely the addition of one copper wire. So the addition of copper wire in this study greatly affects the temperature of the stove's flame. The characteristic of the flame produced by mixing used cooking oil and kerosene is reddish yellow in color. The characteristics of the flame produced by mixing used cooking oil and kerosene are reddish yellow with a maximum height of 11 cm - 15 cm in each percentage of the mixture. Keywords: Addition of copper wire, jelantah oil, kerosene

Pengaruh Penggunaan Zat Aditif Minyak Cengkeh Terhadap Prestasi Mesin Sepeda Motor Injeksi 4 Langkah Paksi, Pegi Satria Eka; Sudia, Budiman; Kadir, Abd .
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 4 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

At this time, fuel oil has become a basic need by the Indonesian people due to the increase in the use of vehicles, while the government is still subsidizing fuel oil. For this reason, it is necessary to save on the use of fuel oil. The alternative that can be done is reformulating fuel oil with additives that function to enrich the oxygen content in the fuel. The purpose of this study is to determine the performance of the engine which can be seen from the fuel consumption and acceleration of the vehicle in which the percentage of clove oil mixing which is most effective in its use will be known. This research includes mixing 1.5%, 2.5%, 3.5% and 4.5% mixture of clove oil to premium/gasoline. In this study, the formulation of a premium fuel/gasoline mixture with clove oil was most effective and efficient on fuel consumption, namely in the stationary test it was a mixture of 1.5% while in the running test it was a mixture of 2.5%. For the acceleration test, the best mixing formulation is in the 4.5% mixture formulation, both in the 0-70 km and 40-70 km tests.

Pengujian Eksperimen Pembuang Panas dan Aliran Udara Pada Berbagai Bentuk Heatsink Masrianto, Zulqifli; Mangalla, Lukas Kano; Gunawan, Yuspian
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 4 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Heatsinks are widely used in heat exchangers to increase the rate of heat transfer between a surface and the working fluid. This study aims to determine the effect of surface shape and area, and air flow velocity on the rate of heat transfer of the three different heatsinks. The research was conducted experimentally by testing three forms of heatsinks with variations in air flow velocity in a small windtunell. The windtunnel is equipped with test equipment such as a handheld wind meter, K-Type thermocouple and a stopwatch. The heating source for the three model heatsinks is an electric heater that can reach a heating temperature of 100oC. Air flow velocity is varied from 0.5 m/s, 1.0 m/s and 1.5 m/s. The results of this experiment show that the heat dissipation rate is directly correlated with the air flow velocity and the heat transfer surface area. At flow velocities of 0.5 m/s, 1.0 m/s and 1.5 m/s, the air temperature behind the heat sink (T2) is 62.8oC, 56.7 oC, and 52.4 oC, respectively. From the heat calculation results show that the shape of the heatsink -model 3- dissipates heat higher than others where the surface area is much larger. For a flow velocity of 0.5 m/s, the rate of heat dissipation generated in model 1, Model 2 and model 3 are 26875 J/s, 34449.01 J/s and 37686.19 J/s, respectively. Keywords: Heat dissipation, surface model, air flow and heatsink.

Unjuk Kerja Evaporator Pada Mesin Pendingin Dengan Siklus Adsorpsi Menggunakan Energi Surya Amusadar, Amusadar; Hasbi, Muhammad; Samhuddin, Samhuddin
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 1 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Energy needs in Indonesia continue to increase every year. The largest use ofenergy is in the industrial sector, where its needs reach 42.12% of the totalnational energy needs. To save energy, energy saving measures are needed in theindustrial sector so that the increase in energy demand can be restrained. So weconducted research on the performance of the evaporator in a refrigerationmachine with an adsorption cycle using solar energy. The purpose of this studywas to determine the working process of the evaporator with activated carbonrefrigeration and to determine the efficiency of the evaporator in the activatedcarbon pair adsorption refrigeration system. This research was conducted byobserving and recording the evaporator temperature of the refrigeration machineevery hour. The results of the research in three days of testing, namely, on the firstday the highest evaporator temperature increase was at 16.00 o'clock, which was33.2oC 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 32.2oC 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

Pengaruh Pemanasan Bahan Bakar Terhadap Laju Konsumsi Bahan Bakar Pada Sepeda Motor Sistem Karburator Faradila, Uswatun; Mangalla, Lukas Kano; Sudia, Budiman
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 7, No 1 (2022): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

The increasing human need for transportation requires maksimum engine performance and efficient fuel consumptiton on carburetor system motorcycles. In an effort to improve engine performance it is done various ways one of which is by preheating the fuel. This study aims to determine engine performance through preheating the fuel. This research was conducted on a motorcycle with a carburetor system by providing treatment without heating and by heating the fuel with a fuel preheat temperature of 60oC, 80oC, and 90oC at 2500 rpm engine speed and the fuel used is gasoline and pertamax. In this study, fuel consumption increased at 90oC by 0,38 (Kg/hour), at 80oC and 60oC decreased by 0,30 (Kg/hour) and 0,21 (Kg/hour). Specific fuel consumption at temperature 90oC increased by 0,195 (Kg/kWh), at 80oC and 60oC decreased by 0,155 (Kg/kWh) and 0,106 (Kg/kWh) in gasoline, while in pertamax fuel, fuel consumption more efficient than gasoline, namely at a temperature of 90oC increased by 0,33 (Kg/hour), at 80oC and 60oC decreased by 0,22 (Kg/hour) and 0,19 (Kg/hour) while the specific fuel consumption at a temperature of 90oC increased by 0,170 (Kg/kWh), at 80oC and 60oC it decreased by 0,113 (Kg/kWh) and 0,095 (Kg/kWh).Kata kunci: Engine Performance, Preheating of fuel, Temperature Variations

PERANCANGAN DAN ANALISIS PENGUJIAN KONDUKTIVITAS PANAS PADA TIPE MATERIAL PADAT Saputraa, Ardhii; Samhuddin, Samhuddin; Hasanudin, La
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 7, No 1 (2022): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Thermal conductivity is the ability of a materal to transmit heat from one place to another. The value of thermal conductivity is important to determine the type of good heat conductor and bad heat conductor. But the problem is how to know the value of the thermal conductivity of varios materials.This study aims to determine the value of the conductivity of various solid materials. The test is carried out using the research layout tool. The results of research conducted from various solid materials based on the value of the highest heat transfer area are found in composites with a value of 24.0349 cm2. The largest value of the melting ice flow rate with differential temperature was found in the brass sample with a value of 0.075 gr/s and the lowest in the composite sample with a value of 0.017 gr/s. The highest thermal conductivity value is found in the iron sample with a value of 0.358147 W/m k and the lowest is in the composite sample with a value of0.107522 W/m k.Keywords: Conductivity, Heat Transfer Rate, Differential Temperature

Pemanfaatan Minyak Pirolisis Ban Bekas Menjadi Bahan Bakar Alternatif Saputra, Ade; Mangalla, Lukas Kano; Salimin, Salimin
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 7, No 1 (2022): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Tire production in Indonesia is increasing continuously in line with the increasing automotive industry. Along with that, the waste of used tires that are not used in the environment is increasing. So we researched the use of used tire pyrolysis oil as an alternative fuel. The purpose of this study was to determine how to produce fuel oil through the pyrolysis process of used motorcycle tires and to determine the combustion characteristics of the pyrolysis results of motorcycle-used tires. The method used in this research is an experimental method using a pyrolysis tool and data collection is carried out directly with various temperature variations. The research was conducted at temperatures of 250oC, 300oC, and 350oC to produce 202 ml, 280 ml, and 219 ml of pyrolysis liquid, respectively. The pyrolysis oil combustion test produced shows that the burning of used tire pyrolysis oil takes longer than the burning of kerosene in the same volume. Keywords: Tires, pyrolysis, temperature

Analisa Head Loss Akibat Percabangan Pada Sambungan Reducing T Dengan Variasi Diameter Penampang Lana, Kadek; Salimin, Salimin; Sisworo, Raden Rinova
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 5, No 4 (2020): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Head loss is a phenomenon of flow losses in the piping system. Head loss is very detrimental in fluid flow, because it can reduce the efficiency of fluid flow. This study aims to determine how much the value of head losses (hT) is that occurs in the reducing T pipe connection with diameter variations on the pipe branch 0.0254m (1 inch), 0.019m (3/4 inch), 0.0127m (1/2 inch). This research was carried out experimentally by measuring the branching flow of the flowing fluid by recording the time and volume of water that had entered the measuring tank, then reading the preasure on the manometer. The results showed that the increase in flow rate (Q) was directly proportional to the head loss (hT). Flow greatly affects the size of the Reynolds number of the three connections, the lowest total head loss occurred in the 1-inch reducing T pipe connection with a value between 0.1715 m- 0.2814 m and the highest total head loss occurred in the reducing T inch pipe connection with a value between 0.4110 m- 0.5867 m.Keyword: Reynold Numbe, debit, head Loss

PENGUJIAN SISTEM TOREFAKSI KAYU JATI MENGGUNAKAN MICROWAVE Sarifudin, Sarifudin; Mangalla, Lukas Kano; Barata, La Ode Ahmad
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 7, No 1 (2022): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Torrefaction is a heat treatment of raw biomass to obtain a fuel that is more stable, has a high energy density and higher brittleness and is easy to grind. The purpose of this study is to determine changes in physical properties, calorific value of water absorption resistance (hydrophobic) in teak wood after the torrefaction process in the microwave. The method used in this study is an experimental method using a microwave heater equipped with measuring instruments such as a digital thermometer, and digital scales. The biomass material used was finished wood cut with sample sizes of Model 1 (cube 3 x 3 cm), Model 2 (rectangular 7 x 3 x 3 cm), and Model 3 (cylindrical tube 7 x 3 cm). Each material was put in a microwave depth for torrefaction for 15, 25, 35 minutes. The results showed that the model 2 sample experienced the largest mass change of 80.95%, followed by model 3 with a mass change of 76.47% and Model 1 which experienced a mass change of 70%. The longer you experience electromagnetic wave radiation in the microwave, the greater the mass change and the lower the water absorption Keywords: Torrefaction, teak wood, microwave, calorific value, moisture content

Analisis Performa Kompor Bertekanan Menggunakan Bahan Bakar Minyak Pirolisis Dan Minyak Tanah Rasmin, Rasyid; Sudia, Budiman; Hasanudin, La
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 5, No 2 (2020): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

The scarcity of fuel oil (BBM) that occurs due to the limited amountr. Therefore, alternative energy is needed to overcome these problems, one of which is the use of plastic pyrolysis oil on pressure cookers ini the household sector among the lower class of society. The purpose of this study was to determine the performance of a pressurized stove using pyrolysis oil and kerosene as fuel. The method used in this research is an experimental method by making pyrolysis oil and mixing kerosene, taking personal data directly with several variations of the mixture. The results of the research on the performance of a pressurized stove by heating 2.5 liters of water show that the most efficient use of fuel ini a mixture of 80% kerosene and 20% pyrolysis oil produces the highenst average temperature of 349 degrees Celcius, maximum flame height of 26 cm, the fastest water boiling time is 10:46 minutes by using at least 130 ml of fuel.Key words: Alternative fuel, pyrolysis, kerosene, performance

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Jl. H.E.A. Mokodompit Anduonohu

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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

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