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Rahmat Iman Mainil
Jurusan Teknik Mesin, Fakultas Teknik Universitas Riau
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Penggunaan Encapsulated Ice pada Thermal Energy Storage Sistem Chilled Water Dengan Laju Aliran Udara Bervariasi Yandra, Vicky; Aziz, Azridjal; Mainil, Rahmat Iman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Air flow rate of Fan Coil Units (FCU) can affect cut off pump time in an air conditioning system, with controling air flow distribution to realization thermal comfort conditions in a residential building. With using secondary cycle of chiller system, a pump working for circulating chilled water through a FCU, for cooling system by Encapsulated Ice and water in Thermal Energy Storage (TES). A half of valve be opened for circulating volume flow rate of chilled water as normal condition. The thermostat use to controling room temperature at 26°C manually. The objective of this current study is to observ cut off pump power consumption. The Experiment is running in 8 hours with variations air flow rate 1.234 m/s and 2.432 m/s. The overall resultsshow that power consumption of pump can reduce around 15.11 % and 31.25%.Keywords: Encapsulated Ice, TES, Chiller.
Kaji Eksperimental Performansi Alat Pengering Tenaga Surya Tipe Kabinet Jenis Pemanasan Langsung Untuk Pengeringan Pisang Surya, Ahmad; Aziz, Azridjal; Mainil, Rahmat Iman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Open sun-drying was commonly used to dry the bananas. In fact, bananas were spread on bamboo’s tray and exposed to solar radiation without any covers. The banana usually contaminated by insects, animals and dusts which can make the bananas have a low quality. Therefore, an appropriate dryer is needed to overcome this problem. Solar dryer cabinet type was considered as an alternative device. This study was conducted to observe the performance of the solar dryer cabinet by experimental method. A direct solar dryer cabinet was constructed. The dryer consists of solar collector, drying chamber, glass cover and six racks. The drying time was 8 hours. Open-sun drying was also running in the same time as comparison. 3 kilograms banana were dried and take place on six racks. Solar dryer cabinet type gives the maximum temperature of 62,9 °C inside and 31,9 °C outside. Solar dryer cabinet has reduced the mass of banana approximately 49,6 % than initial mass. With open-sun drying could reduce approximately 25,6 % than initial mass. The results show that the banana which dried with solar dryer cabinet has produce brown colour, sweet taste and thin shape than open-sun drying. Beside that, the drying rate was also faster than open-sun drying. The quality of drying was better when using solar dryer cabinet type than open-sun drying.Keywords : Drying, Banana Drying, Solar Dryer.
Pengaruh Beban Pendinginan Terhadap Temperatur Sistem Residential Air Conditioning Hibrida Dengan Kondensor Dummy Tipe Trombone Coil Menggunakan Refrigeran Hidrokarbon Thalal, Thalal; Aziz, Azridjal; Mainil, Rahmat Iman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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An experimental study in the hybrid air conditioning machine as air conditioner and water heater by retrofitting R-22 with hydrocarbon refrigerant (HCR-22) have been investigated. Drop-in experiments were carried out without any modification on the system. The system has been tested by varying the internal heat load 0, 1000, 2000, and 3000 W for residential cooling load simulation. The measurements taken during two hour experimental periods at 5 minutes interval times for temperature set point of 19°C. Temperature of the system is the objective of this research. The result shows refrigerant temperature of HCR-22 lower than R-22 because differences of compressor discharge pressure. Temperature discharge decrease between 16.22-24.02 ˚C. For conditioned room, room temperature in every internal heat load was relative same. And water temperature in 50 L storage are 46.58-48.81 ˚C.Keywords : Hybrid Air Conditioning, Dummy Condenser, Hydrocarbon Refrigerant HCR-22, Cooling Load.
Pengaruh Laju Aliran Air Sistem Evaporative Cooling Terhadap Temperatur Sistem Mesin Pengkondisian Udara Jenvrizen, David; Aziz, Azridjal; Mainil, Rahmat Iman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Evaporative Cooling is an air conditioning system that uses water to cool and add moisture or humidity in the air flow, so ball temperature is dry become cooler before experiencesublimate process. Media temperature change influence coolant to water debit change whichis if water temperature the greater, therefore resulting water debit will get little conversely if water temperature gets little, therefore resulting water debit will be even greater. Media temperature change influence water cooler to its air humidity if coolant media temperature the greater therefore resulting air humidity also the greater too. On this research streaming debit that result effectiveness at the best which is in a row 1,2, 1,04, and 0,8 liters / minutes. Besides with marks sense purpose increase evaporative cooling can make kompresor'scharges gets demulcent.Keywords : Evaporative Cooling, Condenser, Relative Humidity, Power Compression.
Pengaruh Penggunaan Katup Ekspansi Jenis Kapiler Dan Termostatik Terhadap Tekanan Dan Temperatur Pada Mesin Pendingin Siklus Kompresi Uap Hibrida Menggunakan Refrigeran 22 Mainil, Rahmat Iman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Hybrid system is the system that can increase the energy efficiency by recovering waste energy of energy conversion machine. This research aims to investigate the vapor compression refrigeration machine performance that obtained by using capillary expansion valve, thermostatic expansion valve, and addition of hotspot water heater (HWH). The test was conducted with four variations of test, such as using capillary in standard condition, using thermostatic in standard condition, using capillary with HWH, and using thermostatic with HWH. The pressure and temperature data were collected in every 5 minutes during 120 minutes of operation. The results showed that the compressor pressures when using capillary and thermostatic types of expansion valve in standard condition were obtained at 340 Psia and 350 Psia. Meanwhile, the compressor pressures when using HWH addition were obtained at 350 Psia and 291 Psia. The capillary expansion valve pressures in standard condition and with HWH were increased by 4.50 % and 11.13 % respectively to the thermostatic pressures. The compressor temperatures using capillary in standard condition decreased by 4.03 %, but using capillary in HWH condition increased by 1.60 % to the thermostatic temperatures. The inlet temperature of HWH coil using thermostatic was increased by 2.31 % to the temperature of coil while using capillary. Meanwhile, the outlet temperature was decreased by 11.22 %.Keywords: Expansion Valves, Pressure, Temperature, and HWH
Pengaruh laju Aliran Air Terhadap Temperatur Sistem Mesin Pengkondisian Udara Hibrida Menggunakan Kondensor Dummy Tipe Helical Coil (Diameter Pipa 1/4") Sebagai Water Heater Dengan Pembebanan 2000 Watt Anam, Khoirul; Aziz, Azridjal; Mainil, Rahmat Iman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Energy saving is one way to reduce energy usage without decreasing the results. This way can be obtained byusing the hybrid air conditioning. Other than energy saving, the hybrid air conditioning also can reduce theeffects of global warming by condenser waste heat recovery. This research aims to investigate the effect ofvariations flow rate in water heater tank to the system temperatures of hybrid air conditioning using helical coiltype of dummy condenser with 1/4˝ diameter of copper pipe. Experimental method is used in this research. Thetest was conducted with several water flow rate variations (1/3, 2/3, and 3/3 valve openings) and using coolingload of 2000 Watt as residential cooling load simulation. The result showed that the water temperature in waterheater tank was changed in every water flow rate variations. The highest water temperature was obtained at39.77˚C for 0 valve opening (full-closed valve), but, the lowest water temperature was obtained at 32.57˚C in3/3 valve opening (full-open valve).Keywords: water heater, helical coil, dummy condenser.
Pengujian Mesin Pendingin Minuman Portable Kapasitas 4,7 Liter Dengan Modul Termoelektrik Menggunakan Aluminium Dan Tanpa Aluminium G, Renhard Niptro; Mainil, Rahmat Iman; Aziz, Azridjal
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Thermoelectric cooling is a heat pump equipment based works on peltier effect. When electric current was applied, the heat absorption occurs at the junction of the two metals and heatloss in another connection. The Benefits of using thermoelectrics could be applied via a portable beverage cooler. Therefore, the portable beverage cooler test using 1 peltier element TEC1-12706 type with capacity of cooler box is 4,7 liter. Cooler box dimensions arelength 24,7 cm, width 18,5 cm and height 18,5 cm. The data capture in this study are cooling chamber temperature, heat sink temperature, ambient temperature, the temperature of the inner wall and outer wall. The results show that steady temperature conditions are using of aluminum without cooling load 21°C after 45 minutes and a load of six beverage cans (1980 ml) 27,8°C after 50 minutes. Whereas a portable beverage cooler isn’t using ofaluminum without cooling load 24,6°C after 50 minutes and a load of six beverage cans (1980 ml) 27,7°C after 35 minutes. A portable beverage cooler is using aluminum has a better performance than a portable beverage cooler isn’t using aluminum.The greater cooling load then be longer performance of steady temperature. Whereas not the use of aluminum inversely.Keywords: Thermoelectric, Cooling Loads, Steady, Aluminium
Kaji Eksperimental Kinerja Turbin Angin Sumbu Vertikal Tipe Darrieus H 4 Blade Profile Naca 2415 Dengan Variasi Sudut Pitch Kusuma, Muh Wira Tri; Aziz, Azridjal; Mainil, Rahmat Iman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
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Abstract

Wind energy including renewable energy development. In previous research for the wind turbine of vertical type Darrieus H profile naca 2415 still slightly, thus lifted the title research on the performance of vertical wind turbine type Darrieus H profile naca 2415. The purpose of this research is to find the effect on the performance of the pitch angle for the vertical wind turbine type darrieus H with profile NACA 2415. This research uses experimental method, with varying wind speed and angle of pitch given of the wind speed 3.6 m/s, 4.15 m/s, 5.04 m/s and the variation the angle of pitch 0°, 10°, 20°, with a load of 250 grams. As for capturing data is wind speed and rotation shaft. The results of research on wind speed 3,69 m/s performance turbine are highest in large Angle of pitch 0° , with large value CP = 4,35 %, wind speed 4,15 m/s performance turbine more effective in large angle of pitch 0° , with large value CP = 3,80 % , wind speed 5,04 m/s performance turbine effective in large angle of pitch 0° , with large value CP = 2,42 % .Keyword: Darrieus H, Angle of pitch, Blade, NACA 2415
Pengujian Mesin Pendingin Minuman Portable Menggunakan Port USB Dan Adaptor Sebagai Daya Input Syukrillah, Muhammad Faizal; Mainil, Rahmat Iman; Aziz, Azridjal
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Thermoelectric is one of the cooling technology alternatives other than vapor compression systems. Thermoelectric is used as a cooling media in a portable beverage cooler. This study aims to measure temperature of portable beverage cooler using thermoelectric module with cooling load and without cooling load. The temperature observed were hot side temperature (heatsink), cold side temperature (the inner wall), cooling chamber temperature, ambient temperature, outside wall temperature and water temperature. Experiments had been carried out using an adapter and USB as primary power for 30 minutes. The results reveal that the use of an adapter in the voltage of 12 V provides better cooling. This could be seen after 30 minutes the lowest temperature cooling chamber without cooling load is 9,7 °C, with a cooling load beverage cans of 250 ml is 18,7 °C, with acooling load milk box of 250 ml is 18,4 ° C, and with a cooling load isotonic drink of 140 ml is 14,8 °C.Keywords : Thermoelectric, Portable Beverage Cooler, Peltier Effect, Cooling Load
Analisis Evaporative Air Cooler Dengan Temperatur Media Pendingin Yang Berbeda Listiono, Hendra; Aziz, Azridjal; Mainil, Rahmat Iman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Evaporative cooling process occurs when water vapor is added to air having a relative humidity of below 100%. Relative humidity is a value that is contained in the temperature of the dry bulb and wet bulb temperature of the air. the lower the relative humidity, the greater the potential for evaporative cooling. The research was conducted using the experimental test tools Evaporative Air Cooler Honymell CS12AE. Variables used are temperature cooling medium (water) that is 10, 20, 30, 40, and 500C and the wind speed is (4,57m/s), (3.9 m/s), and (2,93m/s). The data used is the wet bulb temperature and dry bulb temperature on the back of the fan, the temperature of the wet bulb and dry bulb temperature in front of the fan and then the temperature of the wet bulb and dry bulb in the room. Data were taken every 10 minutes for 180 minutes. The test results are temperature cooling medium (water) effect on the relative humidity. The highest humidity is achieved at a temperature of the cooling medium (water) 500C ± 30C and the fan speed ishigh with 92.83% relative humidity. And the lowest humidity was 85.87% at a temperature of 100C ± 30C with a cooling medium high fan speed. Coolant temperature effect on the results of the efficiency and the rate of evaporation of water masses. The highest efficiency on the cooling medium temperature of 100C± 30C with an efficiency of 5.42% with a high fan speed. The highest rate of evaporation of the water mass occur at a temperature of 500C ± 30C cooling medium is 0.00039821 kg/s.Keyword : efficiency, relative humidity, tdb, twb.
Co-Authors Abd. Rasyid Syamsuri Adha, Aidil Adi Hans Purba Adriyus putra Afdhal Kurniawan Mainil Ahmad Surya Ahmad Wisnu Sulaiman Atria Martina Aulian Samri Aziz, Azdrizal Azridjal Aziz Bungsu Herwanto Dani Ikhsan Putra Deni Kurniawan Dicky Ikhwandi Eigko Malau Eko Saputra Faisal Afif Faisal Tanjung Farida Isroani Ferly Septian Iskandar Gihon Matondang Giri Saputra Gontor Andrapica Gordon HTTM Hasra Rafika Helmizar Hendra Abdul Aziz Hendrik Syahputra Henni Syawal Herisiswanto ' Herisiswanto, Herisiswanto Irwandi Hidayat Izzuddin Ali Raja Siregar, Izzuddin Ali Raja Izzudin Ali Raja Siregar Jenvrizen, David KHOIRUL ANAM Listiono, Hendra luthfi afiif yazu Muh Wira Tri Kusuma, Muh Wira Tri Muhammad Faizal Syukrillah Muhammad Faizal Syukrillah, Muhammad Faizal Muhammad Rif’at Syahnan N. Nazaruddin Nofriadi Nofriadi Novreta Ersyi Darfia Nugrah Suryanto Nurman Saputra Nurul Deswita P. Eko Prasetyo Purba, Adi Hans Putra, Rio Ahmad Juliansyah Rahman Asfaranda Renaldi Khaesar Kumara Renhard Niptro G, Renhard Niptro Renhard Niptro Gultom Ruben Siregar Saberina Hasibuan Sai, Khotso Sarwo Fikri Sayfri Syafri Solly Aryza Suprayitno Suprayitno Surya, Ahmad Syafri ' Thalal, Thalal Tio Vani Nesri Utari Prayetno Wandi Wahyudi Windiharto, Nurcholish Yandra, Vicky Yoan Perima Yovan Witanto