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I Made Kartika
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Mechanical Engineering

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UJI EKSPERIMENTAL MESIN PENDINGIN BERPENDINGIN UDARA, DENGAN MENGGUNAKAN REFRIGERAN R22 DAN REFRIGERAN R407C Kevin Sanjaya; I Made Kartika; Harto Tanujaya
Jurnal Ilmiah Teknik Mesin POROS Vol 12, No 2 (2014): Jurnal Ilmiah Teknik Mesin POROS
Publisher : Program Studi Teknik Mesin Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (441.775 KB) | DOI: 10.24912/poros.v12i2.565

Abstract

Abstract: Refrigerant R22 can cause ozone layer depletion so that required refrigerant substitute for R22. Refrigerant R407C is one of the refrigerant substitute for R22. Research of refrigerant in the cooling engine with air-cooled condenser is done by experimental methods. This research was conducted using refrigerants R22 and refrigerant R407C with a flow rate of 20 L /h, 40 L/h, 80 L/h and 120 L/h. Test data processing include the calculation of refrigeration capacity, compressor power and COP values. COP or Coefficient Of Performance shows the efficiency of the refrigerant. The best COP values are in the refrigerant flow rate of 40 L/h, with R22 COP value of 5.818 and R407C COP value of 4.875. 
ANALISIS PERBANDINGAN UNJUK KERJA PEMANAS AIR TENAGA SURYA TIPE PLAT DATAR DENGAN SISTEM SINGLE DAN DOUBLE CUTOFF Ivan Budiman; I Made Kartika; Abrar Riza
Jurnal Ilmiah Teknik Mesin POROS Vol 14, No 1 (2016): Jurnal Ilmiah Teknik Mesin POROS
Publisher : Program Studi Teknik Mesin Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (346.952 KB) | DOI: 10.24912/poros.v14i1.829

Abstract

Abstract: Warm water is needed by human being to take a bath, wash their clothes, their dishes etc. By the photothermal conversion, the solar energy can be used to heat the water. Flat solar collector is a tool which is used to capture energy of the sun radiation then convert it into heat to heat up water in collector’s pipes. The number of glass cover used effects the performance and efficiency of the collector. From this research, it is found that the efficiency of the collector is better when the cover used are two glasses than one glasses. The temperature difference of incoming and outgoing water in the collector using two glasses 15 ̊C higher than that of one glass. 
PENGARUH VARIASI MAIN JET NOZZEL PADA SISTEM KARBURATOR TERHADAP UNJUK KERJA MESIN Alvinsen Alfonso; Abrar Riza; I Made Kartika
Jurnal Ilmiah Teknik Mesin POROS Vol 13, No 2 (2015): Jurnal Ilmiah Teknik Mesin POROS
Publisher : Program Studi Teknik Mesin Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (862.474 KB) | DOI: 10.24912/poros.v13i2.819

Abstract

Abstract: This study discusses the effect of variations in the diameter of the main jet nozzles on the performance of the motor fuel. Performance analysis covering torque, power and specific fuel consumption (sfc). With the aim to determine the maximum performance that can be generated on any variation of the diameter of the main jet nozzles. At the time of this experiment performed with the engine 4 stroke Honda GX-160, using hydro tool dynamometer and using premium fuel. The data taken is the engine rotation, the force measured on the dynamometer and the time spent fuels. Tests conducted at the Laboratory of Energy Conversion Mechanical Engineering UNTAR Jakarta. Testing is done by providing the machine with a load variation of rotation remains in order to obtain a force on each spin machine with a main jet nozzle diameter variations. Variations rev the engine starts at the minimum rotation until maksimuml with fixed load, variations in the diameter of the main jet nozzles on testing. 
ANALISA PENGARUH PENAMBAHAN THERMAL ENERGY STORAGE PADA PEMANAS AIR TENAGA SURYA TIPE PLAT DATAR Maharuli Maharuli; I Made Kartika; Harto Tanujaya
Jurnal Ilmiah Teknik Mesin POROS Vol 14, No 1 (2016): Jurnal Ilmiah Teknik Mesin POROS
Publisher : Program Studi Teknik Mesin Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/poros.v14i1.830

Abstract

Abstract: Solar energy, the renewable energy is only available at certain hour. So it is essential to develop efficient, economical solar thermal energy storage. Thermal energy storage (TES) systems provide several alternatives for efficient energy use and conservation. Phase change materials (PCMs) for TES are materials supplying thermal regulation at particular phase change temperatures by absorbing and emitting the heat of the medium. TES in general and PCMs in particular, absorb energy during the heating process as phase change takes place and release energy to the environment in the phase change range during a reverse cooling process. PCMs possesses the ability of latent thermal energy change their state with a certain temperature. Paraffin is the PCM used in this research. Paraffin is being added to a solar water heater to store thermal energy at daylight and supply the stored energy to the heat pipe when the sundown. From this research, it is found that the solar water heater with paraffin need longer heating time than the conventional solar water heater but it could provide steadier heating performance and warm water even when the sun was down. 
Co-Authors Abrar Riza Alvinsen Alfonso Harto Tanujaya Ivan Budiman Kevin Sanjaya Maharuli Maharuli