International Journal of Research in Vocational Studies (IJRVOCAS)最新文献

{"title":"Analysis of the Effect of Tapioca Flour Adhesive on the Characteristics of Palm Oli Empty Charcoal Briquettes","authors":"M. A. Pulungan, S. Siahaan, Siti Maretia Benu","doi":"10.53893/ijrvocas.v2i4.156","DOIUrl":"https://doi.org/10.53893/ijrvocas.v2i4.156","url":null,"abstract":"Palm oil solid waste such as oil palm empty fruit bunches (TKKS) if not processed can be explained by the environment. This study attempts to study the utilization of oil palm empty fruit bunches as charcoal briquettes. Charcoal briquettes are one of the alternative fuels to replace fuel gas and firewood charcoal. The empty sign of the oil palm is burned so that it becomes charcoal, then the charcoal is ground and sifted, after being sifted it is given a mixture of adhesive, namely tapioca flour. The mixed charcoal is put into a briquette press. The research was conducted on a laboratory scale with a carbonization process at a temperature of 500℃, carbonization time of 3 hours. The process of drying briquettes at a temperature of 100⁰C for 1 hour. Comparison of the composition of 1000 grams of empty oil palm fruit bunches with 20% tapioca starch adhesive. From the results of the study, the briquette values obtained were as follows: 4775.18 cal/g, 6.96% water, 9.18% ash content, and 84 minutes of burning time. The empty bunches of charcoal briquettes were tested according to the SNI No.1/6235/2000 standard, which is a minimum calorific value of 5000 cal/gram, a maximum water content of 8%, and an ash content of 8%. The parameters of water content and burn time have met the standard. The parameters of the ash content and calorific value of the samples taken and tested have not met the standard of SNI No.1/6235/2000. One of the steps that can be tried to improve the quality of the ash content and calorific value is to rearrange the composition of the adhesive. \u0000 ","PeriodicalId":14205,"journal":{"name":"International Journal of Research in Vocational Studies (IJRVOCAS)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83043215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of The Addition of Acacia Powder Ash and Carbide Welding Ash to Increase the Production of Brick Craftsmen","authors":"Marlia Adriana, Norminawati Dewi, B. Kurniawan, I. Safitri","doi":"10.53893/ijrvocas.v2i4.155","DOIUrl":"https://doi.org/10.53893/ijrvocas.v2i4.155","url":null,"abstract":"Many bricks are produced by small business and industries as construction materials. As the population increases, there is also more demand for bricks in construction construction. The materials used in this study are waste from the acacia wood burning process and carbide welding ash waste. These two materials will be tested into additives from making bricks. The research method was carried out using testing of moisture content, specific gravity, Atterberg limit testing (Liquid limit) as well as a visual description of bricks with an outside temperature without a combustion process. Of the three samples, the average moisture content obtained, the lowest moisture content value was 69.41% in a mixture of clay soil plus acacia ash which showed that the soil category was a soft organic clay  category  with the characteristic that the soil could be pressed with the tip of the thumb so that the soil was suitable to be used as additional raw material in making stone stones without burning. The results of the average soil specific gravity test of 2 samples showed a Gs value of 2.64 at a temperature of t0 C, this shows that the soil with the organic clay category is in accordance with the test results on the moisture content that the clay soil is the basic raw material. The liquid limit test in this study showed the average value of water content in bricks without additives as much as 120.36%: the average value of water content in bricks with additives from the values of the three samples can be known that the mineral clay material is of the montmorillonite type with a liquid limit value of 100-900. Visual observations showed that bricks printed using clay soil raw materials without additives showed a break (split) in half during the drying process for 2 days with a temperature of 30oC; the mixture of clay soil and welded ash of the brick carbide experienced small cracks / crak on the surface with the drying process at the same temperature while the mixture of clay soil with acacia ash showed intact bricks without intact bricks without  fractures or cracks on the surface in the drying process using the same temperature. \u0000 ","PeriodicalId":14205,"journal":{"name":"International Journal of Research in Vocational Studies (IJRVOCAS)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78973114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Syngas Generation in a Crossdraft Gasifier System Using a Rice Strew Filter","authors":"Y. Bow, Isdaryanto Iskandar, Harjadi Gunawan","doi":"10.53893/ijrvocas.v2i3.154","DOIUrl":"https://doi.org/10.53893/ijrvocas.v2i3.154","url":null,"abstract":"One solution to the fossil energy crisis is to use alternative energy, such as coal conversion. Coal may be utilized as an alternative energy source via a variety of methods, one of which being gasification. Gasification is a thermochemical process that converts a solid fuel into a combustible fuel in the presence of less oxygen than is necessary for stoichiometric combustion. One of the gasification methods involves utilizing a crossdraft gasifier system using rice straw as a syngas filter. The goal of this research is to determine the ideal temperature for producing syngas with the highest efficiency through the gasification process. According to study, the most ideal temperature for producing excellent quality syngas is acquired at 750°C with syngas concentration of CH4 1.99%, CO 7.97%, CO2 9.03%, H2 6.82%, O2 12.11%, 62.08% N2 and 16.56% efficiency reached at 650oC.","PeriodicalId":14205,"journal":{"name":"International Journal of Research in Vocational Studies (IJRVOCAS)","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80087350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Sanitation Technology for Waste Management and Drainage Using the Analytical Hierarchy Process (AHP) Method in Bangko City","authors":"A. Yulia, D. Helard, V. S. Bachtiar","doi":"10.53893/ijrvocas.v2i3.147","DOIUrl":"https://doi.org/10.53893/ijrvocas.v2i3.147","url":null,"abstract":"Sanitation in Indonesia is defined as efforts to dispose of liquid waste and domestic waste to create a clean and healthy living environment both at the household and settlement levels Domestic waste management needs to be considered in managing a settlement Domestic waste products, especially those containing human feces, contain dangerous pathogens. If it is released directly into water bodies without processing it will result in environmental pollution Technology and knowledge are needed to accelerate the implementation of development states that technology options are highly dependent on technical and non-technical aspects; environmental factors, cultural and behavioral factors, as well as capital and recurring cost factors To analyze the choice of technology, determined based on perception using the Process Hierarchy Analysis (AHP) method. the AHP method can be used in determining sanitation technology in specific areas in order to obtain the most suitable sanitation technology for use in specific areas. The selected sanitation technology is a recommendation that is acceptable to the local population. Based on this, in order to accelerate the implementation of development, it is necessary to determine the right choice of sanitation technology for slum settlements in Bangko City, Merangin Regency. The selection of sanitation technology in the most effective waste treatment technology in Bangko uses the AHP method, namely conducting sewage treatment by suctioning feces with 31% and good drainage by making grase traps as much as 28%.","PeriodicalId":14205,"journal":{"name":"International Journal of Research in Vocational Studies (IJRVOCAS)","volume":"29 2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90871625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Earthing Resistance and Poldzolic Soil Resistivity at PT. Perta Samtan Gas Field Extraction Plant Prabumulih","authors":"D. E. Putra, Falupi Kurniawan, Rahmawan Sinaga Rahmawan Sinaga, M. K. R. M. Khoirur Rozikin, Fajar Imam Alhidayah Fajar Imam Alhidayah, Yudha Pradhana Adhi Negara, Muhammad Almuchlis","doi":"10.53893/ijrvocas.v2i3.116","DOIUrl":"https://doi.org/10.53893/ijrvocas.v2i3.116","url":null,"abstract":"It is important to undertake research at the location of PT. Perta Samtan Gas Field Extraction Plant Prabumulih with Podzolik soil type (yellow gravel clay) and analysis in order to prevent work accidents and the risk of fire caused by leakage current at the gas processing extraction installation. Direct measurement of soil resistance value is used as the basis for the methodology, which is followed by literature study as background information and technical comprehension of experimental research. The outcomes of the research study are then compared using Comsol simulation with the computational method of computational finite element analysis of the resulting resistance. According to the data, the resistivity of the podzolic soil was 214.4 Ωm, while the Comsol simulation yielded a resistance value per meter of 209.1 Ω and 196.7Ω, respectively. The Comsol simulation demonstrates that, in order to obtain a ground resistance value of 1 ohm on a Single rod system with Fe material, it is necessary to optimize the depth of the grounding electrode, which can range from 3 meters to 1053 meters d. In the simulation, the results of soil resistance measurements and the Comsol Multiphysics application are obtained, and the difference is calculated with a percentage error of 1.62%.","PeriodicalId":14205,"journal":{"name":"International Journal of Research in Vocational Studies (IJRVOCAS)","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84065226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Breaking Capacity Calculation on Busbar Room Panel at PT Trias Indra Saputra","authors":"He Yani, Nurrahmawati Aminah, Nofiansah, Monica Oktarani","doi":"10.53893/ijrvocas.v2i3.141","DOIUrl":"https://doi.org/10.53893/ijrvocas.v2i3.141","url":null,"abstract":"The electric panel has a function as a distribution device and as protection for electricity from the PLN. A panel must at least have protective equipment that functions so that if a fault occurs in electrical equipment, the fault can be corrected and does not interfere with the performance of the panel. In order for the protection equipment to work properly, accuracy is required in selecting the current rating and breaking capacity value of the protection components used. The purpose of this research is to analyze the breaking capacity value, nominal load current value, and short circuit current for each electrical protection component in the busbar room panel at PT Trias Indra Saputra. The analysis was carried out by comparing the results of manual calculations with calculations using the XL3-Pro calcul software, as well as the installed protection components. After calculating and comparing the results, the electrical protection components are still suitable for use as protection in the event of a fault, both short circuit fault and overcurrent on the electrical equipment in the busbar room panel at PT Trias Indra Saputra. In the outgoing protection Q0 is a protection component that connects the power source from the LVMDP panel to the busbar room panel at PT Trias Indra Saputra. Different results were obtained from the three comparisons. By using the MCCB current rating of 100A, it has been able to secure the circuit from short circuit faults and overload","PeriodicalId":14205,"journal":{"name":"International Journal of Research in Vocational Studies (IJRVOCAS)","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84391485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Operation 3 Phase Induction Motor 1 Kw Star Delta System Using Smart Phone","authors":"Nofiansyah, He Yani, M. H. Aulia, Meilianti Meilianti","doi":"10.53893/ijrvocas.v2i3.142","DOIUrl":"https://doi.org/10.53893/ijrvocas.v2i3.142","url":null,"abstract":"In using a 3 phase induction motor there are initial problems. Namely the surge in starting. In most motors induction mainly motors induction three- phase, current starting can reach four to seven times of great current nominal. Horse Power are large, allowing to happen surge currents starting the more substantial and is not be allowed, because it can disrupt the network and can damage the motor it 's own. For this reason, a starting method is needed which can reduce a very large starting current surge. There are several types of starting methods for electric motors. Among them, namely, DOL (direct on line), star-delta, auto transformers, and soft starting. The method that will be used in this research is the starting star-delta method. Star-delta starting is a system starting with running the motor with the configuration of star up first and then converted into a configuration delta for minimizing surge currents. Changes configuration is usually done by using a timer, when the timer has been reached setting the configuration will change. Applying Smartphone via Bluetooth and Arduino Uno R3 to operate a motor Starting way delta by way of sending the instruction in the form of data with a controller that is connected to the motor that. With this method motor operation is easier and safer.","PeriodicalId":14205,"journal":{"name":"International Journal of Research in Vocational Studies (IJRVOCAS)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90499572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Steam Boiler Design Using Diesel Motor Exhaust Gas","authors":"Sailon, Karmin","doi":"10.53893/ijrvocas.v2i3.140","DOIUrl":"https://doi.org/10.53893/ijrvocas.v2i3.140","url":null,"abstract":"As it is known that the boiler is a device used to heat water. This research is conducted to propose another alternative in energy saving efforts by utilizing exhaust gas energy from Diesel motors which so far have not received much attention. The exhaust gases is reused to react the boiler. The method used in design this tool uses the literature study method. The data is taken from the exhaust gas of a 9 x 12 x 4 cylinders Diesel engine with a speed of 300 rpm and Mep 80 Psi, engine power (N) 92.4 Hp. From the results of this study, the results show that the size of the steam pipe with pipe outer diameter (OD) is 1 in, spaced 1 in, the number of rows is 2 rows, the number of pipes in one row Z = 12 rows, with carbon steel pipe material SA 106 Grade. Meanwhile, the size and arrangement of the economizer pipes are the outer diameter of the pipe (OD) 1 in, the spacing = 2 in, the number of rows = 6 rows, the total number of pipes Z = 2 x 6 = 12 pieces, the overall length of the pipe is L x 12, the economizer pipe = 644 in, and SA 106 Grade carbon steel pipe material. The thickness of the boiler drum t = 0.245 cm, capacity Q = 536.75 lb/hour, and the boiler drum material is SA 302 Grade B carbon steel.","PeriodicalId":14205,"journal":{"name":"International Journal of Research in Vocational Studies (IJRVOCAS)","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76631178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Provision of Green Open Space in Jambi City","authors":"Selamat, D. Napitupulu, F. Muchlis, Endi Adriansyah","doi":"10.53893/ijrvocas.v2i3.148","DOIUrl":"https://doi.org/10.53893/ijrvocas.v2i3.148","url":null,"abstract":"Environment through the provision of parks and green open spaces (RTH), is carried out area and number of residents spread across the Jambi. urban areas is very necessary. Parks are needed to maintain land availability, as water catchment areas, which can play a role in helping water absorption, so that the supply of water in the ground (water saving) increases and reduces the potential for flooding, by reducing the amount of water runoff. This study used a quantitative descriptive method with research from the Jambi City Statistics Center (BPS). The research was carried out in the Administrative Region of Jambi City. The results of the analysis  provision of public green space  based on the area need for public green open space in Jambi City is 3,617.50 ha. The available public open space area is around 779.02 ha. Based on these results, there is a difference in the area of 2,838.48 ha, and the provision of public green open space based on population according to Minister of Public Works Regulation Number. 5 of 2008 it can be seen that the need for a park area in Jambi City is 1,243.70 ha. The available garden area is approximately 188,388.27 m2 or 18.84 ha. Based on these results, there is a difference in area shortage of 1,224.86 ha. Jambi City over the past 13 years (2020-2033) Some strategies Increasing the area of public open space in fulfilling intrinsic and extrinsic functions,  socializing the availability of green space functions for life and the environment and Spatial planning that is equal to 20% for public open space from the total area of the city. The area of green open space in Jambi City is only 779.02 ha and is very far from the area of Jambi City which is ± 20,538 ha.","PeriodicalId":14205,"journal":{"name":"International Journal of Research in Vocational Studies (IJRVOCAS)","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84317145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Testing of Deliver Active Power for Operation Sub–Sync and Super-Sync on Doubly Fed Induction Generator Applied in Wind Turbine","authors":"Mutiar, Siswandi, Yessi Marniati, Nurhaida, Dezetty Monika","doi":"10.53893/ijrvocas.v2i3.152","DOIUrl":"https://doi.org/10.53893/ijrvocas.v2i3.152","url":null,"abstract":"Technology developments related to the renewable energy industry are increasing, one example of wind power generation technology which has several relationship configurations with generator. This system configuration is known a wind generator with a DFIG (Double Fed Induction Generator). This system can supply active power from the induction generator stator connected directly to the network while the rotor is connected to the network through a back to back converter. The operation of the double feeder induction generator (DFIG) consists of two conditions, the first condition is super-synchronous where power will be transmitted from the rotor through the converter to the network and the second condition is sub-synchronous where the rotor will absorb power from the network through the converter. This research was conducted to determine the active power distribution in two operating conditions of a double feeder induction generator. Generator power delivery increases for sub-synchronous and super-synchronous operation when active MSC increases from 10% to 60% and generator speed is constant. For a changing speed and a constant active MSC, constant power distribution from the generator (PDFIG) is obtained.","PeriodicalId":14205,"journal":{"name":"International Journal of Research in Vocational Studies (IJRVOCAS)","volume":"404 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75694944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}