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Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Engineering
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Articles 3,145 Documents
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Kalibrasi Jangka Sorong Jam Ukur (Dial Calliper) Dengan Menggunakan Metode Standar JIS B 7507 - 1993 Di Laboratorium Pengukuran Teknik Mesin Universitas Riau Zulfebri Zulfebri; Dodi Sofyan Arief
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

The calibration of dial calliper is the form of activity to determine the truth of the conventional value by using measuring ruler with the measuring clock as the substitute of a nonius scale. The degree of accuracy from a dial inching ruler is the same as the nonius inching bar, 0.10 mm, 0.05 mm or 0.02 mm. On the dial inching bar with the accuracy of 0,10 mm by using the standard JIS B 7507-1993 method. As a result of analysis, the uncertainty value of the measuring instrument from dial caliper I at a rate of trust 95% with a coverage factor of k = 2 is U95 = ± 9.50 . The uncertainty value of the dial caliper II at a rate of trust 95% with the coverage factor k = 2 is U95 = ±9,50 . The uncertainty value of the dial caliper III at a rate of trust 95% with the coverage factor k = 2 is U95 = ±9,50 . Measurement error / deviation measuring clock caliper (dial calliper) I and II with the measuring block measuring 150 mm is 0.00007 mm. While the clock measuring caliper (dial calliper) III with the measuring block measuring 150 mm is -0.04993 mm. Based on the table errors that allowed JIS B 7507-1993 is ± 0.07 mm so caliper measuring clock (dial calliper) I, II and III are still within the allowed tolerance limit mistakes and still feasible to be used.Keywords:Calibration, Calliper, Dial Calliper,Standard JIS B 7507-1993
Kalibrasi Mikrometer Sekrup Eksternal Dengan Mengacu Pada Standar JIS B 7502 - 1994 Di Laboratorium Pengukuran Teknik Mesin Universitas Riau Kurnia, Andry; Arief, Dodi Sofyan
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

Activities to determine the truth value of the appointment of a conventional measuring instruments and measuring ingredients by comparing against a standard measure that traceable to a national standard for the unit of measure and internationally is the purpose of the calibration so that the existing external micrometer screw in Mechanical Engineering Laboratory Measurements can be seen Riau University how much difference deviation between the right price with the price indicated by an external micrometer screw. In the external calibration process micrometer screws there are six components , namelymeasurement uncertainty: Uncertainty measuring gauge block, standard uncertainty micrometer resolution , standard uncertainty able to re- reading of the micrometer , standarduncertainty the effect of temperature , standard uncertainty geometric correction , wringing standard uncertainty. As a result of analysis obtained values Value uncertainty of measuringdevices external I micrometer screw at a rate of 95% coverage factor of k = 2 is U95 = ± 5,8092 mm with a gauge factor correction tool = 0,00025 mm. The uncertainty of the value ofan external measuring instrument micrometer screw II at a rate of 95% coverage factor of k = 2 is U95 = ± 5,8092 mm by measuring factor correction tool = 0,00025 mm. The uncertaintyof the value of an external measuring instrument micrometer screw III equal to 95% coverage factor of k = 2 is U95 = ± 5,8092 mm and measuring instrument correction factor = 0,00975 mm.Keywords: Dimensional metrology , calibration , micrometer , uncertainty
Pengaruh Pembengkokan Terhadap Kekuatan Baja Sruktur Tulangan Beton Di Lingkungan Air Gambut Kana Sabatul Ikhwan; M Dalil
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

Concrete reinforcement steel bar when it began ordering from manufacturers and further functionalized into the building structure experience bending process to ease the transportation activity or while loading and unloading is not willful bent. Environmental conditions also affect the physical and mechanical condition of the reinforcement steel bar. From the many environmental conditions of corrosion, the selected scope is the peat water as a characteristic geographical conditions in Riau Province. The research methodology is testing experimentally. Concrete reinforcement steel bar is bent on angle (α) 20o, 40o, 60o, 80o, 100o, 120o, 140o, 160o, and 180o. There are two groupings of each bending specimens, they are soaked in the peat water and not soaked in the peat water. Then the specimens is straightened for tensile testing. The average tensile strength and ductility of reinforcing steel bar increase varies depending on the bending angle when compared to normal reinforcement steel bar. The percentage of elongation decreased due to the bending depends of bending angle. Meanwhile, due to bending and soaked in the peat water, the tensile strength was increased but not exceeding the sample group were not soaked and the value of elongation decreased lower than the reinforcing steel bar that is not soaked.Keywords: Bending, Steel bar, Peat Water, Strength
Pengaruh Beban Pendingin Terhadap Temperatur Sistem Pendingin Siklus Kompresi Uap Dengan Penambahan Kondensor Dummy Tipe Multi Helical Coil Sebagai Water Heater Sarwo Fikri; Azridjal Aziz; Rahmat Iman Mainil
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

Increasing the efficiency is one of methods to assist the Indonesian government’s planning in saving energy. One of them is to combine two functions from two different devices become a new device that have two functions. For instance, Split AC is used to cool the room. The adding of dummy condenser in Split AC is using heat exhaust at condenser that functioned as water heater. In this research, it is aimed to identify the effect of adding the dummy condenser toward cooler load. The method used in this research was design and experimental method. Based on the test, When cooler load was given to the room, the more the burden of cooling given, the higher refrigerant temperature to be thus heat water temperature was higher as well. During the operation 120 minutes, it obtained that heat water temperature was 84,110C and refrigerant temperature was 64,770C.Keywords : Dummy Condenser, Temperature, Cooler load and water valve faucet.
Pengaruh Penggunaan Katup Ekspansi Jenis Kapiler Dan Termostatik Terhadap Tekanan Dan Temperatur Pada Mesin Pendingin Siklus Kompresi Uap Hibrida Eko Saputra; Azridjal Aziz; Rahmat Iman Mainil
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

Research conducted into 4 variation is varied using capillary expansion valve standard conditions, thermostatic expansion valves standard conditions, capillary expansion valve with additional hotspot water heater, and thermostatic expansion valve with additional hotspot water heater. Data is collected every five minutes during the 120 minutes of testing. The research aimed to find out the performance of the engine coolant when the use of capillary expansion valve, thermostatic water heater and additional Hotspot Water Heater (HWH). Performance cooling machine includes pressure and temperature. The test results demonstrate the use of standard conditions thermostatic expansion valve compressor working pressure lower at 322.37 Psia thermostatic and 323.2 Psia capillary compared to 0.26% while the condition with the use of thermostatic valves HWH lower at 274.03 psia thermostatic compared to the capillary 287.37 psia amounted to 4.64%. To pressure thermostatic expansion valve using standard conditions and with the use of HWH lower than that of thermostatic capillary than the capillary are 92.12 Psia and 105.95 Psia at 13.05% and thermostatic 67.28 Psia and 94.45 Psia compared capillary amounted 28.77%, Compressors temperature for use thermostatic standard conditions and with the use of HWH higher than the capillaries are 90.85oC thermostatic compared capillary 83.74 oC at 7.83% and 91.31 °C thermostatic compared to the capillary 79.77 °C at 12.64%. For the hotspot temperature in the water heater using thermostatic higher than the capillaries are 87.26 oC thermostatic compared capillary 77.34 oC at 11.37% while the hotspot temperature of the water heater out thermostatic more likely the same that thermostatic capillary 46.95oC than 48.44 °C of 3.07%.Keywords : Thermostatic Expansion Valve, Pressure, Temperature, dan HWH
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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Abstract

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.
Perancangan Ulang Vacuum Evaporator Untuk Pengering Madu Kapasitas 50 Liter Afrian Afrian; Nazaruddin Nazaruddin
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

Honey is unique product from insect which contain high percentage of carbohydrates. Honey obtained from the forest contains high water content due to climate change. The reduction of water content honey need a machine such as evaporator. Evaporator is a separator machine water content honey using pressure and temperature. Evaporator parts of such as: vessel, vacuum pumps, electric motors, electric heater, and control system. This research used vessel as a place honey processing. Vessel is pressure of fluid storage container, part of vessel such as: shell, head, opening and support. This research explains how to design the pressure vessel using standard of ASME section VIII Boiler and Pressure Vessel, obtain dimension from mixer such as a screw and impeller. Results from this research obtained shell inner diameter is 22.55 inch with a thickness of 0.142 inch, the outer shell diameter is 24.81 inches with a thickness of 0142 inch, head diameter is 22.55 inch with a thickness 0.142 inch, opening (diameter nozzle on the vacuum pump 1 inch with a thickness of 0.065 inch and diameter nozzle on water level control 1 inch with a thickness of 0.065 inch). Obtained dimension screw with a diameter 4 inch and pitch distance of screw 3.2 inch with screw angle 22o. obtain dimensions impeller Da = 11.28 inch, w = 2.26 inch, Dd = 4.51 inch dan L = 2.82 inch.Keywords : Evaporator, Pressure Vessel, System Control
Kaji Pembuatan Sistem Kontrol Mesin Vacuum Evaporator Penurun Kadar Air Madu Kapasitas 50 Liter Angga Islam Darmawan; Nazaruddin Nazaruddin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
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Abstract

Honey is a food that is very beneficial for health. Based on SNI 01-3545-2004 standards for foodstuffs honey, determined the content of water is allowed a maximum of 22% and capped at a maximum processing temperature at 40oC so that other content in honey is not damaged. Evaporating the water at low temperatures can be done by the method of vacuum systems. By lowering the pressure below 1 atm or in accordance with the graph of temperature versus pressure, where to evaporate water at a temperature of 40oC, the pressure required is 7,4 kPa. Vacuum evaporator machine is a machine that serves as a food processing machine that can remove water content contained in the meal ingredients. This study makes a planning vacuum evaporator engine control system for controlling the process. The temperature at 40oC honey processing predefined SNI can be achieved by creating a temperature control system with a controller and use of sensors, so that the temperature treatment process is maintained to keep the content contained in the honey. Pressure is used to evaporate water at a temperature of 40oC is under a pressure of 1 atm, of 7,4 kPa. To achieve the required pressure compressor engine 1 vacuum. The control system using a vacuum compressor control systems that perform manual where the feedback is done by humans. In the processing of round screw mixer and serve as a tool to stir the honey during processing so that warming of honey evenly. With the processing time variation, obtained honey with moisture content of 20.6% at the variation time of 4 hours, the water content of 19.8% at 8 hours and time variations in the time variations are also available 12 hours a moisture content of 19.6%. In accordance with SNI standards 01-3545-2004 of maximum water content of 22% honey can already be obtained by variation of the processing time of 4 hours.Keywords: control systems, vacuum evaporator, honey
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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Abstract

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.
Pengujian Kebulatan Hasil Pembuatan Poros Aluminium Menggunakan Emco T.U CNC - 2A Smkn 2 Pekanbaru Dengan Roundness Tester Machine Erizal Hamdi; Dodi Sofyan Arief; Adhy Prayitno
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

Lathing process is one of the main processes in the manufacturing industry. In the process of turning a product at TU EMCO CNC machine -2a SMKN2 Pekanbaru possible deviations from predetermined geometric characteristics. Aluminium is a light metal having corrosion resistance and good electrical conductivity. In the process of making a product (workpiece) is meticulous, the deviation of the shape, position, place, and rotate deviation to wardsan element geometry (point, line, surface or intermediate area), should be clearly limited to the value of a certain tolerance. Tolerance limits the form of deviation, position and place on aswivel deviation geometric element is referred to as geometric tolerances. Roundness and diameter are the two different geometric character, though interrelated, the lack roundness will affect the measurement results diameter, other wise the measurement of the diameter is not always going to show lack non roundness. From the results, the value of the roundness deviation of each variation of the feeding speed on the machine for the Minimum circumscribed circle feeding speed difference deviation 20 is between 0,011mm to 0,115 mm. feeding speed 40 is between 0.023 mm to 0.063 mm.feeding speed 70 is between 0.040 mm to 0.144 mm. On the Maximum incribed circle speed difference deviation 20 is between 0,007 mm to 0,100 mm. feeding speed 40 is between 0.025 mm to 0.059 mm. feeding speed 70 is between 0.010 mm to 0.108. In the Minimum zone circle feeding speed difference deviation 20 is between 0.011 to 0.109 mm. feeding speed 40 is between 0,024 mm to 0,076 mm. feeding speed 70 is between 0.044 mm to 0.092 mm. At Least Squares Circle feeding speed difference deviation 20 is between 0.008 to 0.029, feeding speed 40 is between 0.005 mm to 0.053 mm. 70 feeding speed is between 0,021mm to 0,047 mm.Roundness deviation value and average Least squares circle every variation of feeding speed, then at a feeding speed of 20 near-perfect roundness deviation value after deducting the correction factor Roundness Tester Machine tools, namely between -0.017 mm to 0,023 mm and the average value of 0.0037 mm.Keywords: feeding speed, Deviation, Roundness Tester Machine.

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