International Journal Applied Technology Research 2021-07-13T06:20:11+00:00 Prof. Dr. Ir. Kasni Sumeru Open Journal Systems <p>The International Journal of Applied Technology Research (IJATR), an academic journal in engineering and technology, was published by Bandung State Polytechnic, Indonesia. This OPEN ACCESS Journal aims to encourage and stimulate the exchange of discourse among professionals and academics worldwide on issues of applied technology research.</p> Mathematical Modeling of Solar Photovoltaic Module to generate Maximum Power Using Matlab/Simulink 2021-07-13T06:20:11+00:00 Amusat Ramoni Olawale Sulaimon Shodiya Yakubu H Ngadda <p>Modeling is a basic tool of the real system simulation in translating the Mathematical results into real life. In this study, the Modeling and simulation of photovoltaic Module type PS-P310-36 were developed, and maximum power was obtained. The output I – V and P – V curves of the model were studied and analyzed under different irradiance (200 W/m<sup>2</sup>, 400 W/m, 600 W/m<sup>2</sup>, 800 W/m, and 1000 W/m<sup>2</sup>) at a constant temperature of 25<sup>o</sup>C. The model attained maximum power of 308, 251.6, 191.4, 129.2, and 64.74 W at 1000, 800, 600, 400, and 200 W/m<sup>2</sup> irradiance, respectively. The model results agreed with the characteristics curves of the PV module of previous similar PV studies. The proposed model will serve as quick tools for designers in obtaining the maximum power of PV at distinct irradiance. However, for a more accurate design, more information is needed.</p> 2021-05-21T07:24:52+00:00 ##submission.copyrightStatement## Application of Organic Inhibitors to the Corrosion of Materials AISI 1070 Steel 2021-07-13T06:20:10+00:00 Destri Muliastri Devi Eka Septiyani Naufal Afif Vania Tingting Sirenden Januar Nur Rohmah Suprihartini <p>AISI 1070 steel is a material that has corrosion when it reacts with the environment. One way to inhibit the corrosion rate is by using organic inhibitors. The organic inhibitors used mango leaves and mango rinds with variations in the concentration of organic inhibitors of 0%, 6%, and 8%, respectively. This study aimed to determine the effectiveness of mango leaf extract and mango rinds as an inhibitor against the corrosion rate of AISI 1070 Steel. The extraction was carried out using the Maceration Method. Fourier Transform Infrared (FTIR), Potenzyodinamic, and Weight Loss tests were carried out in this study.&nbsp; FTIR results show that both mango rinds and mango leaf have ingredients that were able to inhibit the corrosion rate, such as flavonoid functional groups including C – H, C = O, and C – O.</p> <p>Using the weight-loss method, the best corrosion rate was found in the mango rinds extract with a concentration of 8 mL, which was 31.784 mm/year with an inhibition efficiency of 92%. The highest corrosion rate was in 2M H<sub>2</sub>SO<sub>4 </sub>solution using potentiodynamic, without a mixture of inhibitors, that is 0.15589478 mm/year.</p> 2021-05-21T07:27:10+00:00 ##submission.copyrightStatement## Green Corrosion Inhibitors to Head Off the Corrosion Rate of ST 37 Steels 2021-07-13T06:20:09+00:00 Devi Eka Septiyani Arifin Destri Muliastri Rudi Rudiana Fitri Nur Indah Sari <p>The corrosions process is a natural process and cannot be hindered, but it can be protected by adding a green inhibitor. Green corrosion inhibitors are a new alternative solution for corrosion protection because they are low-cost, biodegradable, and eco-friendly inhibitors. This research was used papaya leaves dan guava leaves extract as organic inhibitor solution by Maceration Method. The concentration of these green inhibitors is 0 mL, 1 mL, 2.5 mL, 3 mL, and 3.5 mL. The type of testing method used in this research is FTIR, PDP, and weight loss. The results show that there is Tanin function groups in papaya leaves and guava leaves extract.&nbsp; The potentiodynamic polarization shows the value of corrosion rate without inhibitor is 0,418 mm/year. In contrast, the corrosion rate was decreased with improving the green inhibitor as many 3.5 mL. The corrosion rate was decreased until 0,00055 mm/year, and the value of efficiency is 99,868%.</p> 2021-05-21T07:41:38+00:00 ##submission.copyrightStatement## The Design and Implementation of Fan Chips as Cooling for Milling Process on Aluminum Alloy 5086 to Increase Tool Life 2021-07-13T06:20:08+00:00 Agus Sifa Dedi Suwandi Tito Endramawan Alam Aulia Rachman <p>In the metal machining process, especially in the milling process, the parameters that affect the quality milling process results are cooling media because it affects the tool life used. This paper aims to determine the performance of using fan chips as the coolant in the dry milling process area. The method used is the computational fluid dynamic (CFD) method and the experimental milling process on a workpiece made from aluminum alloy 5086. In experimental testing using a variation of the milling machine spindle rotation. The simulation test results on the fluid flow character on fan chips with a protector producing a central character with a small area. In contrast, fan chips without a protector make a central character with a broader area. The wind speed data in simulation testing and experimental testing produced the same trend graph. The results of the performance of fan chips after experimented with variations in spindle rotation, cooling process on area occurs when the motor spindle rotates above 1120 Rpm on the fan chips with a protector, and the engine spindle rotates above 770 Rpm on the fan chips without a protector. The effect of fan chips on tool life affects increasing tool life by 8 minutes on installing fan chips with a protector and increasing tool life by 12 minutes on installing fan chips without a protector.</p> 2021-05-21T07:53:14+00:00 ##submission.copyrightStatement## Inflammatory Response and Lung Function Toward Illness Perception of Poultry Farm Workers 2021-07-13T06:20:07+00:00 Anita Rahmawati Wahyu Wibisono <p>The poultry farm workers should aware to the risk of respiratory disorders. The illness perception represents belief about health condition of the body. The inhaled organic particles at poultry farm area could trigger chain of immunological reactions that begin from the release of neutrophil and lymphocyte up to fibrogenesis resulted in pulmonary dysfunction. The aim of this study was to identify the association between inflammatory response and lung function with illness perception of poultry farm workers.The study used observasional analytic methods with cross sectional design. One hundred and five poultry farm worker were taken as samples which obtained by purposive sampling methods. Illness Perception Questionnaire-Occupational Respiratory Disorder Risk (IPQ-ORDR) was used to measure the illness perception while the inflammatory response was measured by neutrophil levels. The lung function examination resulted in several lung function parameters (FEV1, FVC and FEV1 to FVC ratio). The results showed that there was no association between the inflammatory response and illness perception (p = 0.228) and the lung function was associated with illness perception (p = 0.001). The illness perception is not always match with the actual respiratory health conditions in poultry farm workers. It is needed to provide more information on the risk of respiratory disorders to the poultry farm workers.</p> 2021-05-21T07:55:22+00:00 ##submission.copyrightStatement## Green Downstream Processing By Using Hydrothermal Extraction For Recovering Flavonoid, Phenolic And Antioxidant Activity From Moringa Oleifera Leaves 2021-07-13T06:20:06+00:00 Ghusrina Prihandini Paqih Purnama Alam <p>Well known as rich in phenolic compounds, Moringa oleifera mature leaf extract show significant antioxidant activity both in vitro and in vivo. It has been widely used at cosmetic, medicine, and functional food sector. Hydrothermal extraction, one of the green environmentally friendly method that fit to M. oleifera feedstock for recovering natural antioxidant namely flavonoid, phenolic, and antioxidant activity. Three parameters were used at this study such as sample-solvent ratio, running temperature and extraction time. Flavonoids were evaluated with 2.4 Dinitrophenyl hydrazine colorimetric, whereas phenolics were measured by tanat acid which react with Foulin ciocealteu reagent. Antioxidant activity was measured by DPPH. The optimum result was obtained at 15 minutes with 140 <sup>0</sup>C for total flavonoid content (TFC) 18.98 mg/g whereas 170 <sup>0</sup>C for total phenolic content (TPC) and antioxidant activity 48.73 mg tanat acid/dried extract; 44.76 mg/L respectively</p> 2021-05-21T08:02:06+00:00 ##submission.copyrightStatement## Simulation Data Acquisition and Control for LNG Custody Transfer Based on ISO 8943 2021-07-13T06:20:04+00:00 Muhammad Arman Edi Wahyu Sri Mulyono Muhamad Anda Falahuddin Wirenda Sekar Ayu <p>Liquefied Natural Gas (LNG) is a complex mixture of low-molecular-weight hydrocarbons with nitrogen as a principal inert impurity. Nowadays, the instrumentation control tools are needed in LNG Commercialization to ensure the LNG is safely transported, while minimizing the energy losses across the network. This research was a preliminary design that used LNG custody transfer control tools referred the ISO 8943:2007 standard. The temperature was measured by thermocouple (Rosemount transmitter 3144 series), while the pressure was measured using pressure transmitter (Rosemount transmitter 3051 series). The simulated signal temperature was done by temperature control box, while the simulated pressure was represented by WIKA pressure calibrator. Data from transmitter was sent to the LabVolt 9063 series that has data acquisition for Software Development Kit (SDK) enabled. Previously, the LabVolt 9063 did not recognized the signal from the transmitter. The SDK software bridged the LabVolt hardware with the LabView software. In the simulated system, temperature alarm will be triggered when the temperature value exceeds 20oC. For simulated pressure, the alarm will respond if pressure value exceeds 30 psi. From the results of this research, the communication between hardware and software worked properly. The data acquisition system was stable during the data collection stage, processing and displaying. In addition, the alarm indicator for both temperature and pressure was met within the threshold value.</p> 2021-05-21T08:06:45+00:00 ##submission.copyrightStatement##