FLYWHEEL : Jurnal Teknik Mesin Untirta
The journal publishes original and (mini)review articles covering the concepts of materials science, mechanics, kinematics, thermodynamics, energy and environment, mechatronics and robotics, fluid mechanics, tribology, cybernetics, industrial engineering and structural analysis. The journal follows new trends and progress proven practice in the mechanical engineering and also in the closely related sciences as are electrical, civil and process engineering, medicine, microbiology, ecology, agriculture, transport systems, aviation, and others, thus creating a unique forum for interdisciplinary or multidisciplinary dialogue.
Articles
222 Documents
<![CDATA[Characteristics of surface roughness and microhardness of nitrided pure iron ]]>
<![CDATA[Jan Setiawan]]>;
<![CDATA[Sugeng Riyanto]]>;
<![CDATA[Sri Galuh Banawa]]>
<![CDATA[ FLYWHEEL : Jurnal Teknik Mesin Untirta Volume 7, Issue 1, April 2021 ]]>
Publisher : <![CDATA[Universitas Sultan Ageng Tirtayasa ]]>
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DOI: 10.36055/fwl.v0i0.10198
<![CDATA[The nitriding process on metal is commonly made to improve hardness, tribological properties, machinery components, and parts durability. This nitriding process shall affect surface roughness. The surface roughness determined the quality of components at the time of its use. The surface hardness changes through the surface chemistry, and to increase the surface roughness are important things to observe the surface modification in nitriding component. The nitriding process of pure iron has been carried out to achieved high surface hardness. The nitriding process was done at the temperature of 1000 °C for 1 hour in the nitrogen atmosphere. This work will discuss the roughness and microhardness characteristic of untreated and treated by nitriding of the pure iron surface to show the correlation of surface roughness to its microhardness. Surface roughness testing is done by mapping the sample area in an array. The surface hardness test is carried out on the Vickers scale. The surface roughness results showed two critical values: surface roughness (Ra) and the mean surface roughness depth (Rz). The surface roughness value of pure iron increased, the lowest value before treated is 0.0465 μm and the highest value after treated is 0.1089 μm. The changes of Rz value before treated is 0.2333 μm and the highest value after treated is 1.160 μm. The surface microhardness after nitriding increased significantly. The average increase that occurred was from 122.8 HV become 533.8 HV.]]>
<![CDATA[Design of Bridging Bridging System for Reporting Loading and Unloading of Goods in Imports and Online TPS Application at the Directorate General of Customs and Excise (DJBC) (Case Study: PT. PolyChemLindo) ]]>
<![CDATA[Anita Megayanti]]>
<![CDATA[ FLYWHEEL : Jurnal Teknik Mesin Untirta Volume VI, Nomor 1, April 2020 ]]>
Publisher : <![CDATA[Universitas Sultan Ageng Tirtayasa ]]>
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DOI: 10.36055/fwl.v2i1.7497
<![CDATA[Temporary Piling Places are used to hoard imported goods while awaiting their release from customs areas in accordance with the provisions of customs law. PT. Polychem Lindo is a company that functions as a TPS (Temporary Hoarding Site) that reports data starting from goods coming off the ship to goods leaving the gate or vice versa.At present the data reported to DJBC (Directorate General of Customs and Excise) is still in manual form even though a web service has been made to integrate the data into DJBC Online TPS, so that information about goods data in real time and monitor its movements from time-to-time.The design of the bridging application system The reporting documents of hoarding of loading and unloading of imported goods with the Online TPS DJBC application (Directorate General of Customs and Excise) is carried out so that the document entry process is only done in one transaction. This research produces a Bridging System program that functions to bridge the two running systems so that the data input process runs more efficiently. Bridging system is the use of web service information technology facilities that allows two different systems at the same time to be able to carry out two processes without interference from one system on another system.]]>
<![CDATA[The H2S Corrosion Effect On The Stationary Turbine Blade ]]>
<![CDATA[Thomas Agus Bayu Prasetyo]]>;
<![CDATA[Hamdan akbar Notonegoro]]>;
<![CDATA[Ova Kurniawan]]>;
<![CDATA[Sunardi Sunardi]]>
<![CDATA[ FLYWHEEL : Jurnal Teknik Mesin Untirta Volume 7, Issue 1, April 2021 ]]>
Publisher : <![CDATA[Universitas Sultan Ageng Tirtayasa ]]>
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DOI: 10.36055/fwl.v0i0.11213
<![CDATA[The Geothermal fluids were disturbed by volcanic gas sulfide deposit reactions which form by reaction of metal(s) with H2S. this sulfate acid is one of the most corrosive compounds in the steam which lead the pitting, stress corrosion cracking and other corrosion mechanisms. An optical microscope, XRF dan X-ray diffraction is used to observe the sediment samples that came from stationary blades. The results show that it mainly consists of 89.7%wt iron sulfide (FeS) and 10.3%wt arsenic trisulfide (As2S3). This phase is toxic by inhalation and ingestion. Downstream steam pipeline treatment is required to reduce sulfide carried away into steam turbines such as scrubbing or washing steam. For this reason, special handling is needed for the toxic waste resulting from washing.]]>
<![CDATA[The Effect of Power on Drying Rate of Sugarcane Bagasse Drying by Using Microwave ]]>
<![CDATA[Melvin Emil Simanjuntak]]>
<![CDATA[ FLYWHEEL : Jurnal Teknik Mesin Untirta Volume VI, Nomor 1, April 2020 ]]>
Publisher : <![CDATA[Universitas Sultan Ageng Tirtayasa ]]>
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DOI: 10.36055/fwl.v2i1.7396
<![CDATA[The sugarcane is a food plant that is widely used in daily life as a sweetener This plant is processed in a factory to produce sugar. In sugar processing, it needed a large amount of energy where its source is bagasse. As a fuel, sugarcane bagasse still has a moisture content of around 50% so the calorific value is quite low. The drying process is needed to increase this calorific value. There are many drying processes that can be used where one of them is microwave drying. The microwave drying is faster if compared to hot air. In this study, the sample of sugarcane bagasse used was chopped to a size of about 3 cm. The mass of samples used weight of 100, 125 and 150 gr and placed in an aluminum foil. The measurement of sample mass is done every minute. The electrical power used varies by 50%, 60%, 70%, 80%, 90% and 100% of the maximum power of the microwave oven. The result of the study shows a proportional reduction in moisture ratio for each power percentage difference used. The heavier sample mass will result in a smaller drying rate. The regression shows that the normal logarithmic equation is more suitable for the drying rate equation.]]>
<![CDATA[THE PERFORMANCE OF VAPOR COMPRESSION REFRIGERATION SYSTEM USING R-1270 ]]>
<![CDATA[Kamin Sumardi]]>;
<![CDATA[Ega Taqwali Berman]]>;
<![CDATA[Mutaufiq Mutaufiq]]>
<![CDATA[ FLYWHEEL : Jurnal Teknik Mesin Untirta Volume 7, Issue 1, April 2021 ]]>
Publisher : <![CDATA[Universitas Sultan Ageng Tirtayasa ]]>
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DOI: 10.36055/fwl.v0i0.9998
<![CDATA[The use of environmentally friendly refrigerants as working fluids in vapor compression refrigeration systems can prevent global warming effects and depletion of the ozone layer. This research aims to obtain data on the performance of the vapor compression refrigeration systems that use R-1270. Refrigerant R-1270 is categorized into the hydrocarbon (HC) group that is environmentally friendly with ODP = zero and GWP <3. Tests were conducted on vapor compression refrigeration system that consisted of a domestic refrigerator (RD) and a chest freezer (CF). The parameters measured in this research were: refrigeration effect, compression work, weight of refrigerant circulated, electricity consumption, coefficient of performance, and the time required to reach the lowest evaporator temperature. In testing, the first step was to conduct a test on the vapor compression refrigeration system that used baseline refrigerant (R-134a) with a weight according to the manufacturer’s recommendations. Then, the second step was to test the performance of the vapor compression refrigeration system that used R-1270 with a mass of 30% of baseline. The test was conducted for 300 minutes by recording the observed data at every 30-minute interval. The results showed that the replacement of baseline refrigerant by R-1270 was able to increase the coefficient of performance of the vapor compression refrigeration system by 13% - 56% and reduce electricity consumption by 13.5% - 19%. This research has implications for the work of compressors that becomes easier and cheaper energy costs.]]>
<![CDATA[The Effect of the Gap Distance on The Corrosion Rate of SS400 Steel and C27000 Brass ]]>
<![CDATA[Darmawi - Darmawi]]>
<![CDATA[ FLYWHEEL : Jurnal Teknik Mesin Untirta Volume VI, Nomor 1, April 2020 ]]>
Publisher : <![CDATA[Universitas Sultan Ageng Tirtayasa ]]>
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DOI: 10.36055/fwl.v2i1.7569
<![CDATA[Crevice corrosion occurs due to differences in oxygen concentration inside and outside the gap. These experiments are conducted on the crevice formed by SS400 Steel and the C27000 Brass on the base of gap distance parameters in the ammonia polluted environment. Such crevice often found in boiler joints, turbines and machinary parts. Corrosion rate of SS400 steel when it stand alone in the ammonia environment is 0.7554 mpy while the interface potential is -130 mV VS Cu/CuSO4. The corrosion rate of C27000 Brass when stand alone at related ammonia environment is 20.144 mpy and the interface potential is -1191 mV VS Cu/CuSO4. When both metals combine to form a crevice, the corrosion rate of steel increased by 28% averagingly. The tests include a gap where the two metals mating each other (no distance), forming a distance of 0.239 mm and 0.398 mm. The interface potential of both metals when touch -518 mV VS Cu/CuSO4, -288 mV when formed a gap distance 0.239 mm and 0.398 mm. On the contrary the corrosion rate of Brass C27000 decreases significantly upto 60% when joining to form a gap with steel. Interface potential of Brass C27000 when forming a gap with no distance with steel is – 632 mV VS Cu/CuSO4.]]>
<![CDATA[Synthesis and electrical conductivity of silicon carbide fiber as electronic semiconductor ]]>
<![CDATA[Masripah Masripah]]>;
<![CDATA[Jan Setiawan]]>;
<![CDATA[Agustino Zulys]]>
<![CDATA[ FLYWHEEL : Jurnal Teknik Mesin Untirta Volume VI, Nomor 1, April 2020 ]]>
Publisher : <![CDATA[Universitas Sultan Ageng Tirtayasa ]]>
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DOI: 10.36055/fwl.v2i1.6379
<![CDATA[Silicon carbide shows advantage characteristics to be used as electronical devices that operated in the extreme conditions. Its potentially improve many limitations compared to the silicon. The applications of SiC are used in high power, high frequency, and/or high temperature conditions. Intrinsic semiconductor properties of SiC has high thermal conductivity, mechanically and chemically stable and good resistance to the radiation. In this research, SiC fiber was synthetized from polycarbosilane polymer precursor (PCS) that solved in N,N-dimethylformamide (DMF) and toluene. This solution was that processed using electrospinning to form fibers. The fibers were cured at 200 °C and continued with pyrolyzed varied at 1200, 1300 and 1400 °C for 1 hour. The fibers electrical conductivity were carried out by LCR meter. The electrical conductivity for lower frequency at 62.36 Hz showed 7.28 × 10-6 S, achieved by the fibers that pyrolyzed at 1200 °C. For high frequency at 100 kHz showed the fibers that pyrolyzed at 1400 °C acquired for 1.24 × 10-5 S.m-1 for its electrical conductivity. The value of its band gap based on Kubelka Munk Equation was take placed for fibers that showed significant value at high frequency using UV-Vis DRS. The band gap value was achieved at 2,56 eV.]]>
<![CDATA[Effect Of Titanium On Corrosion Behavior Of Aluminum Alloy 3104 As a Candidate Material For Radiator Combustion Engines ]]>
<![CDATA[Arief Syarifuddin Fitrianto]]>;
<![CDATA[Bambang Soegijono]]>;
<![CDATA[Caing Caing]]>;
<![CDATA[Hamdan Akbar Notonegoro]]>
<![CDATA[ FLYWHEEL : Jurnal Teknik Mesin Untirta Volume 7, Issue 1, April 2021 ]]>
Publisher : <![CDATA[Universitas Sultan Ageng Tirtayasa ]]>
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DOI: 10.36055/fwl.v0i0.10855
<![CDATA[Aluminum Alloy 3104 is aluminum usually used for beverage can. By modifying the content of Titanium content in the alloy, it is expected that this material will be suitable for radiator engine combustion. Especially for its corrosion behavior in coolant solution. Aluminum alloy with different content of Titanium was investigated on its crystal structure, morphology and its corrosion behavior in ethylene glycol solution which is usually used as additive in coolant water. X-ray diffractometer, Electron microscope and potentiodynamic were used to investigate the crystal structure, morphology and corrosion behavior respectively. The results show (002) crystal plane dominate the surface of the sample as the Titanium increase. The (111) and (002) crystal plane are very low compare to (022) crystal plane. Crystallite size and micro strain are affected by addition of Titanium. Surface morphology are clearly affected by the addition of Titanium. Addition of Titanium causes corrosion behavior of the samples. It concludes that the aluminum alloy with different Titanium content in this research, can be used for making radiator combustion engine.]]>
<![CDATA[Cooling System Performance Comparison of Refrigerant R-134a and MC-134 on Ice Slush Machine ]]>
<![CDATA[Rizki Muliawan]]>;
<![CDATA[Azel Adnal A]]>;
<![CDATA[Tandi Sutandi]]>;
<![CDATA[Nurrohman Nurrohman]]>
<![CDATA[ FLYWHEEL : Jurnal Teknik Mesin Untirta Volume 7, Issue 1, April 2021 ]]>
Publisher : <![CDATA[Universitas Sultan Ageng Tirtayasa ]]>
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DOI: 10.36055/fwl.v0i0.9237
<![CDATA[Ice Slush Machine uses a direct cooling vapor compression system. The primary refrigerant used in such a system mostly is hydrofluorocarbons (HFCs), such as R134a. R134a is a retrofit for refrigerant R-12 which is included in the chlorofluorocarbon (CFC) type of refrigerant. CFC-type refrigerants have a dangerous impact on the environment. Hydrocarbon refrigerant MC-134 is an alternative for R-134a because it has a low potential value for environmental damage. The secondary refrigerant used was propylene glycol and the product used was 3.5 liters of Coca-Cola. From the test results when the system using R134a had an average COPactual and an average COPcarnot of 2.6 and 4.55, respectively, and the energy consumption was 1.571 kWh with an average efficiency of 57%, while in a system with MC-hydrocarbon refrigerant 134 obtained an average COPactual and an average COPcarnot of 2.8 and 4.5, respectively and the energy consumption of 1.325 kWh with an average efficiency of 62%. Therefore, MC-134a had COP actual greater than R-134 and electrical energy consumption of MC-134 was less than R-134a.]]>
<![CDATA[Electrochemical Behavior, Structure, and Morphology of Electrodeposited Nickel on Copper Alloy Prepared from Sulfate Bath without Additive Addition ]]>
<![CDATA[Bambang Soegijono]]>;
<![CDATA[Ferry Budhi Susetyo]]>;
<![CDATA[Hamdan Akbar Notonegoro]]>;
<![CDATA[Musfirah Cahaya Fajrah]]>
<![CDATA[ FLYWHEEL : Jurnal Teknik Mesin Untirta Volume VI, Nomor 1, April 2020 ]]>
Publisher : <![CDATA[Universitas Sultan Ageng Tirtayasa ]]>
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DOI: 10.36055/fwl.v2i1.7724
<![CDATA[Nickel and nickel alloy has good chemical and physical properties to enhance corrosion resistance. Electrodeposited nickel layer are expected to enhance corrosion resistance of copper as substrates. The difference distance crystal plane of Nickel and Copper is about 0.02 – 0.03 Angstrom. The electrochemical behavior, structure and morphology of electrodeposited nickel on copper substrate in sulfate solution were investigated. Electrodepositions of nickel layer were conducted at room temperature with various current densities (10 mA/cm², 20 mA/cm², and 30 mA/cm²). Electrochemical behavior, structure, and morphology of the samples were analyzed by using potensiostat, x-ray diffraction (XRD), and Scanning electron microscope (SEM). The x-ray diffraction patterns show that the nickel has cubic FCC crystal system and space group Fm-3m. The current density during electrodeposition influence crystal parameter, crystallite size and micro strain of nickel film deposited. Electrodeposited nickel with current density 30 m A/cm² shows the best corrosion resistance.]]>
