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Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin
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 5 Documents
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Search results for , issue "Vol 2, No 4 (2017): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin" : 5 Documents clear
STUDI PEMANFAATAN LIMBAH ABU TERBANG BATUBARA (FLY ASH) DAN KALENG MINUMAN SOFT DRINK SEBAGAI PENGGANTI MATERIAL BAJA RINGAN Samhuddin Samhuddin; Budiman Sudia; La Ode Iqwal
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 2, No 4 (2017): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (105.354 KB) | DOI: 10.55679/enthalpy.v2i4.2935

Abstract

The purpose of this research is to know the effect of fly ash addition to the hardness and toughness ofmaterial produced. In this research, it is known that aluminum cans waste as a matrix and ash waste coal flyas reinforcement. The tools and materials used in the research are furnace, ladle, stircoast, blower, sand,pattern, waste cans and coal fly ash waste. This research procedure starts from the process of makingspecimens with alloy (%) aluminum-fly ash. Fariation of aluminum-fly ash alloy is 80%: 20%, 70%: 30%,60%: 40%. In Vickers hardness testing seen at the lowest Al-FA hardness level was on specimens withvariation Al 60%: FA 40% ie 49.78528 kg / mm² and highest Al-FA hardness was in specimens withvariation Al 80%: FA 20 % alloy that is equal to 60,25068 kg / mm². Meanwhile, on the toughness impacttest, the highest impact strength value is in Specimens with Al 60% variation: FA 40% alloy is 0.162 J / mm²and the lowest impact strength is in specimen from 100% Aluminum variation of 0.056J / mm².Keywords: Metal matrix composite, Aluminum, and fly ash
PENGARUH ARTIFICIAL AGING DAN NATURAL AGING TERHADAP KEKERASAN DAN STRUKTUR MIKRO PENGECORAN LOGAM PISTON Al-Si Edriyanto Edriyanto; Ridway Balaka; Aminur Aminur
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 2, No 4 (2017): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (440.641 KB) | DOI: 10.55679/enthalpy.v2i4.2937

Abstract

The purpose of this research is to know the effect of artificial aging and natural aging on increasing hardness and micro structure of Al-Si alloy recycling. The material used in this research is Al-Si alloy which comes from motorcycle piston scrap which is casted like piston (prototype). The casting method used is acasting wherein a liquid metal is poured into a mold without pressure. Piston scrap is melted with 700????C temperature, on induction furnace for 1 hour and poured into die casting. Product of castings of prototype motorbike piston are prepared to be specimen followed by artificial aging and natural aging process with holding time 1-3 hour to test micro structure and hardness test of vickers method.Vickers hardness test results show that the maximum hardness value of aritifiacial aging specimens is 132,16 Kg / mm² with 3 hours hold time, and the lowest hardness value is 110,31 Kg / mm² with 1 hour hold time. While for themaximum hardness value of natural aging samples is 101,57 Kg / mm² with 3 hour hold time, while the lowest hardness value is obtained equal to 82,53 Kg / mm². With result of observation of micro structure of each sample undergoes structure change.Keywords: Metal casting, natural aging, artificial aging, hardness, and micro struktur.
PENELITIAN KERUGIAN ENERGI PADA SAMBUNGAN PIPA T 90 Salimin Salimin
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 2, No 4 (2017): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (247.772 KB) | DOI: 10.55679/enthalpy.v2i4.2946

Abstract

The combination and branching flow is a irreversible process in which the irreversibility in technical application will decrease the system erformance.The way to discover the pressure loss at the combination and branching flow is by measuring the head loss and coefficient of loss.   The experiment used 4 kinds of pipe with the variation of Reynolds (Re) from 20092 to 155781. The results of the study indicate the meeting flow: Total coefficient of loss , Ktot(12,7mm) = (2,176 – 0,164), tot(19,1mm)=( 2,836 – 0,515), Ktot(25,4mm)= (2,366 – ,472).Ktot38,1mm = (3,892 – 0,508), Total Head Loss HT12,7mm = (0,789 – 0,101)mH2O, HT19,1mm(0,972 – 0,446)mH2O, HT25,4mm = (1,123 – 0,498)mH2O, HT38,1mm = (1,004 – 0,293  )mH2O branching flow; total coefficient loss, Ktot(12,7mm)  = (3,982 – 0,734) Ktot(19,1mm)  = (6,302 – 1,455)  Ktot (25,4mm) = (8,664 – 2,098), Ktot38,1mm = (13,985 – 3,933)   . Total Head Loss HT12,7mm= (1,028 – 0,396)mH2O, HT19,1mm = (0,934 – 0,404)mH2O, HT25,4mm = (0,930 – 0,40)mH2O, HT38,1mm = (0,577 – 0,411)mH2OKey words : coefficient of loss, Head Losses, combination and branching flow
ANALISIS KONSUMSI ENERGI PADA KANTOR PELAYANAN KEKAYAAN NEGARA DAN LELANG (KPKNL) KENDARI Samhuddin Samhuddin; Kadir Kadir; Muhammad Syahrun
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 2, No 4 (2017): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (116.67 KB) | DOI: 10.55679/enthalpy.v2i4.2926

Abstract

Electricity consumption level of construction or building can be determined by calculating the amount of electrical energy used in a certain time. This study aims to determine electricity consumption levelat KPKNL Kendari. According to the standards set by the 2000 National Standardization Agency for efficient energy for an office building is 240 kWh/m2. Refers to this standard, electricity consumption level of KPKNL Kendari was investigated. To aim the study goals, observation of load used and electrical energy was done. Various load used leads to electricity consumption which measured by dividing total electricity consumption to total building area, known as energy consumption intensity value (Intensitas Konsumsi Energi/IKE). Total electricity consumption for a year was 82,042 kWh and total building area is 913,8 m2. KPKNL Kendari’sIKE is 89.8 kWh / m2, this result shows that KPKNL Kendari electricity consumption Level is efficient. Keywords: Electrical energy, electricity cost, energy consumption intensity.
UNJUK KERJA MESIN PENCACAH SAMPAH Juardin Juardin; Budiman Sudia; Al Ichlas Imran
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 2, No 4 (2017): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (126.82 KB) | DOI: 10.55679/enthalpy.v2i4.2928

Abstract

The aim of this research is to know the difference of time and of the result of plastic waste enumeration on blade before and after modification to material weight of 250gr, 500gr, and 750gr. This study compared the length of time and of the enumeration results on the blades before they were modified and after modified. Variations in waste weight were 250gr, 500gr, and 750gr. The results showed that the percentage comparison of the length of the process of enumerating plastic waste before modification with the weight of 250gr resulted in enumeration time for 35 seconds, so that the effective capacity of the tool was 25.71 kg / hour. For weight of garbage equal to 500gr produce enumeration time for 126 second, with tool capacity 14,28 kg/hour. While the weight of garbage 750gr produce enumeration time for 192 seconds, with the effective capacity of the tool of 14.06 kg/hour. For the conditions after modification of the blades, the weight of the waste of 250gr resulted in an enumeration time of 80 seconds, in which the effective capacity of the apparatus was 11.25 kg/hr. For the weight of garbage of 500gr was resulted enumeration time for 255 seconds, where the effective capacity of the tool obtained was 7.05 kg/hour. While the weight of 750gr garbage generates the enumeration time for 401 seconds, where the effective capacity of the tool obtained of 6.73 kg/hour. The quality of enumeration of plastic waste on the blades before the modification was still not chopped properly, while the results of plastic waste debris on the blades after modified has been chopped well but the results were not irregular. Keywords: Plastic waste, chopping machine, enumeration time, size of enumeration result.

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