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All Journal Jurnal MEKANIKAL Teknik Mesin "TEKNOLOGI" PROtek : Jurnal Ilmiah Teknik Elektro Jurnal Teknologi Terapan EPI International Journal of Engineering Jurnal Penelitian Enjiniring Fakultas Teknik Unhas
Wahyu H. Piarah
Universitas Hasanuddin
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Mechanical Engineering

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Journal : Jurnal MEKANIKAL

 1 
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

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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  
ANALISIS PENGGUNAAN GASOHOL DARI LIMBAH KULIT PISANG TERHADAP PRESTASI MESIN MOTOR BAKAR BENSIN Piarah, Wahyu H.; Djafar, Zuryati; Mangkau, Andi
Jurnal MEKANIKAL Vol 2, No 1 (2011)
Publisher : Jurnal MEKANIKAL

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Usage of type alcohol of etanol in gasoline fuel proves a number of machine achievements in terms of parameters, namely actual horsepower, specific fuel consumption, mean effective pressure and thermal efficiency compared to use pure premium fuel. Level of such repair gyrate 73% from maximum energy according to machine specification. In yielding etanol, fermentation process with yeast mixture then destiltaion. Etanol mixed with premium with certain ratio. In this research, variation of mixing of alcohol premium, namely: 95%+5%; 90%+10% and 85%+15% by 3 variation  throttle opening: 20%, 40% and 60%. The result indicates that with usage of concentration mixing of premium + etanol, reached actual horsepower by Kijang machine 7k experiencing with maximum value equal to 17,347 kW that happened at condition of opening of throttle 60% at rotation 2100 rpm with usage of mixing 95% premium + 5% etanol. With usage of concentration mixing of premium + etanol, specific fuel consumption also experience with maximum value equal to 0,331 kg/ kWh that happened at condition of throttle opening by 20% within rotation of 2100 rpm with usage of mixing 90% premium + 10% etanol.
KINERJA REFRIGERAN HCR-22 SEBAGAI PENGGANTI REFRIGERAN R-22 PADA SISTEM PENYEGARAN UDARA DOMESTIK KINERJA REFRIGERAN HCR-22 SEBAGAI PENGGANTI REFRIGERAN R-22 PADA SISTEM PENYEGARAN UDARA DOMESTIK Piarah, Wahyu H.
Jurnal MEKANIKAL Vol 1, No 2 (2010)
Publisher : Jurnal MEKANIKAL

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Abstract

The purpose of this study is to analyze the performance of HCR-22 refrigerant as a subtitute  matter to R-22 refrigerant. The research methods is to test the influence of the usage of different refrigerant to the cooling length of the room, cooling effect, compressor work, the COP and refrigerant mass flow rate. The results show that HCR-22 refrigerant more quickly cool the room compared to R-22 refrigerant. Average cooling effect of HCR-22 refrigerant = 256,606 kJ/kg and R-22 refrigerant = 159.927 kJ / kg. Average working compressor of HCR-22 refrigerant = 60,334 kJ/kg and R-22 refrigerant= 25.361 kJ / kg;  COP of HCR-22 refrigerant = 4,141 and R-22 refrigerant = 6.306;  Mass flow rate of  HCR-22 refrigerant = 0,039kg / s and R-22 refrigerant = 0.062 kg / s.
Co-Authors A.A. Ketut Agung Cahyawan W Abdul Halim Amrullah Amrullah Andi Mangkau Anjar Asmara Asril Mallombasang Basri Basri Daud Patabang Effendy Arief Effendy Arif Hariyanto Hariyanto Irwan Paserangi Khairil Anwar Lita Asyriati Latif Mohammad Yusuf Muhammad Irsyad Fauzi Muhammad Syafrun Mustofa Mustofa Nasaruddin Azis Novriany Amaliyah Sabiqunnas sabiqun Sallolo Suluh Syukri Himran Thomas Tjandinegara Usman Syamsuddin Yuli Asmi Rahman Zulkifli Djafar Zuryati Djafar Zuryati Djafar