Effendy Arif
Department of Mechanical Engineering, Faculty of Engineering, Hasanuddin University, Jalan Perintis Kemerdekaan KM 10, Tamalanrea, Makassar 90245

Published : 4 Documents
Articles

Found 4 Documents
Search

EFEK TEMPERATUR PIPA KAPILER TERHADAP KINERJA MESIN PENDINGIN Anwar, Khairil; Arif, Effendy; Piarah, Wahyu H.
Jurnal MEKANIKAL Vol 1, No 1 (2010)
Publisher : Jurnal MEKANIKAL

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The aims of this research are to obtain (1) the effect of the capillary tube temperature on the refrigerant condition and the refrigerating capacity in the refrigeration system and (2) the optimum temperature condition for obtain better system performance.This research was done in the Refrigeration System Laboratory at Tadulako University in Palu. The method applied in this research is an experimental method, with various temperature at capillary tube. Various temperature is obtained by placing capillary tube in freezer from other refrigeration system (refrigerator), through arrangement of thermostat.The result of this research indicates that decreasing cooling temperature of capillary tube causes refrigerating capacity and Coefficient of Performance of refrigeration system increases. Optimum performance of this examination during 30 minutes, obtained on the lowest thermostat temperature position that is –20°C ( position 7) with Coefficient of Performance (COP) of 2.71  
PENGARUH PENAMBAHAN GAS OKSIHIDROGEN TERHADAP UNJUK KERJA MOTOR BENSIN BERBAHAN BAKAR PERTAMAX Harman, Harman; Arif, Effendy; Hasan, Duma
DINAMIKA – Jurnal Ilmiah Teknik Mesin Vol 7, No 1 (2015)
Publisher : HALUOLEO UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (884.052 KB)

Abstract

Salah satu cara yang dapat dilakukan bagi pengguna motor bensin untuk mensiasati kenaikan harga bahan bakar minyak adalah pemanfaatan gas oksihidrogen (HHO), yang dapat diperoleh dengan cara melakukan elektrolisa Air (H2O) sebagai suplemen. Penelitian ini bertujuan untuk mengetahui pengaruh gas Oksihidrogen terhadap unjuk kerja mesin dengan menggunakan bahan bakar Pertamax sebagai bahan bakar utama. Sebuah generator sederhana dibuat, dimana mampu menghasilkan gas HHO sebesar masing-masing 0.05 L/menit pada konsumsi daya 72 watt, dan 0.13 L/menit pada konsumsaai daya 96 watt. Perhitungan prestasi mesin diperoleh berdasarkan pengukuran data hasil eksperimen pada Mesin ENDURO XL 4-tak di laboratorium. Pada pengujian standar, dimana digunakan Pertamax  tanpa suplemen gas HHO, pada putaran 3000 RPM dan beban pengereman 3 kg, diperoleh torsi sebesar 1.8 N.m,  daya efektif (Ne) sebesar 0.57 kW, konsumsi bahan bakar spesifik (SFC) sebesar 0.609 kg/kWh serta efisiensi termis sebesar 13.49%. Pada pengujian dengan penambahan gas HHO  yang diperoleh dari generator, dengan konsumsi daya battery sebesar 96 watt serta pada putaran 3000 RPM dan beban pengereman 3 kg,  diperoleh torsi sebesar 3.9 N.m, daya efektif sebesar 1.225 kW, konsumsi bahan bakar spesifik sebesar 0.303 kg/kWh dan efisiensi termis sebesar 28.46%. Kesimpulan dari penelitian ini adalah bahwa dengan penambahan gas HHO yang diperoleh dari hasil elektrolisis, dapat meningkatkan Torsi, daya Efektif dan efisiensi termis  mesin serta menurunkan konsumsi bahan bakar spesifik
Experimental Study of an SWH System with V-Shaped Plate Jalaluddin, Jalaluddin; Arif, Effendy; Tarakka, Rustan
Journal of Engineering and Technological Sciences Vol 48, No 2 (2016)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (422.813 KB) | DOI: 10.5614/j.eng.technol.sci.2016.48.2.7

Abstract

Solar energy is known as an environmentally friendly energy source with a wide range of applications. This energy can be utilized in various applications such as domestic and industrial water heating using solar water heating (SWH) systems. The thermal performance of an SWH system using a V-shaped absorber plate is presented in this study. Two SWH systems with different absorber plates, i.e. a flat-plate and a V-shaped plate, have been investigated experimentally. First, the absorptivity of the absorber plates was calculated analytically. The optimum V-shaped configuration with angle at β = 21° (V-shaped dimensions t = 4 cm and l = 4 cm) was determined from various V-shaped plate absorbers based on their absorptivity and applied in the experimental study. Two SWH systems were installed and tested at a low flowrate of 0.5 L/min and at a high flowrate of 2 L/min. The results showed that the SWH system with V-shaped plate absorber had a 3.6-4.4% better performance compared with that of the system with flat-plate absorber.
EFEK TEMPERATUR PIPA KAPILER TERHADAP KINERJA MESIN PENDINGIN Anwar, Khairil; Arif, Effendy; Piarah, Wahyu H.
Jurnal MEKANIKAL Vol 1, No 1 (2010)
Publisher : Jurnal MEKANIKAL

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The aims of this research are to obtain (1) the effect of the capillary tube temperature on the refrigerant condition and the refrigerating capacity in the refrigeration system and (2) the optimum temperature condition for obtain better system performance.This research was done in the Refrigeration System Laboratory at Tadulako University in Palu. The method applied in this research is an experimental method, with various temperature at capillary tube. Various temperature is obtained by placing capillary tube in freezer from other refrigeration system (refrigerator), through arrangement of thermostat.The result of this research indicates that decreasing cooling temperature of capillary tube causes refrigerating capacity and Coefficient of Performance of refrigeration system increases. Optimum performance of this examination during 30 minutes, obtained on the lowest thermostat temperature position that is –20°C ( position 7) with Coefficient of Performance (COP) of 2.71