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International Journal of Research in Vocational Studies (IJRVOCAS)
Published by Yayasan Ghalih Pelopor Pendidikan
ISSN : 27770168     EISSN : 27770141     DOI : https://doi.org/10.53893/ijrvocas.v1i1
Core Subject : Economy, Science, Education, Social, Engineering,
Aerospace Engineering Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other
The International Journal of Research in Vocational Studies (IJRVOCAS) is a double-blind peer-reviewed journal. This journal provides full open access to its content on the principle that making research freely and independently available to the science community and the public supports a greater global exchange of knowledge and the further development of expertise in the field of vocational education and training (VET). IJRVOCAS is since the beginning independent from any non-scientific third-party funding. The establishment of the journal was supported between 2015 and 2016 with grants from the Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation). All members of IJRVOCAS work on an honorary basis. The journal is hosted by Ghalih Publishing and the publishing house of the Ghalih Academic. Scope IJRVOCAS covers all topics of VET-related research from pre-vocational education (PVE), initial vocational education and training (IVET) and career and technical education (CTE) to workforce education (WE), human resource development (HRD), professional education and training (PET) and continuing vocational education and training (CVET).
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 221 Documents
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Design and Implementation of Solar Energy in ATG, CCDS and Pantry Maintenance Monitoring Systems Kamil, Muhammad Insan; Arifin, Fatahul; Dewi, Tresna
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 4 No. 3 (2024): IJRVOCAS - December
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v4i3.295

Abstract

This study aims to design, implement, analyze and evaluate the PV system used in the ATG, CCDS and Maintenance Pantry Monitoring Systems. This study was conducted at PT. Pertamina Patra Niaga, with data collection carried out from June 2024. As for the experimental design carried out to determine the reliability of the equipment made which will be used for ATG motoring, CCDS and Pantry Maintenance, this was carried out to reduce the consumption of fossil energy which has been used through Electricity from PLN. The research results show that the use of the PV system can work optimally, this can be seen from the results of observations, especially at its peak, namely on June 29 2024, namely 2106 watts with a maximum voltage of 84.2V and with the installation of MPPT to ensure there is no overcharging and regulate the input voltage at 29.2V. V to batteries, efficient and effective in replacing previously used conventional energy.
Immersion Cooling and Heatsink System Using Mineral Oil for Enhancing Efficiency and Performance of Polycrystalline and Monocrystalline Solar Panels Suseno T, Moch Adjie; Taqwa, Ahmad; RS, Carlos
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 4 No. 3 (2024): IJRVOCAS - December
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v4i3.296

Abstract

Utilizing solar energy is essential for solving the world's energy and environmental problems, however efficiency concerns brought on by solar panels' high temperatures make it difficult. This study looks into alternative cooling techniques that use heatsinks and mineral oil instead of water as in earlier research. Mineral oil, which is frequently utilized in data center cooling systems, efficiently dissipates heat without producing the noise that conventional fans do. According to the findings, polycrystalline panels equipped with immersion and heatsink cooling outperform panels without cooling by 3.57% in power output and 3.28% in efficiency. They also perform 1.80% and 1.42% better, respectively, than panels that merely have heatsinks. Comparing monocrystalline panels to uncooled panels, they perform better, producing 4.46% more power and 4.63% more efficiently. They also outperform panels that merely have heatsinks by 3.33% and 3.08%. By lowering surface temperatures, these cooling methods have the potential to greatly increase the efficiency of solar panels. However, as the data was gathered during 15 sessions between December 2023 and May 2024, more thorough investigation is required for a thorough comprehension. Longer testing is also required for more dependable results.
Characterization of Rubber Bark (Hevea Brasiliensis) as s Raw Material and Fly Ash as a Catalyst for the Production of Biofuel Fenoldi, Nova; Muhammad Yerizam; Kalsum, Leila
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 4 No. 3 (2024): IJRVOCAS - December
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v4i3.297

Abstract

The research conducted on the utilization of rubber wood bark biomass for biofuel production employs the pyrolysis process. Rubber wood bark, a by-product of rubber plantation waste, has the potential to be converted into energy. However, its utilization has not been optimal, often leading to accumulation issues due to its inability to be fully utilized. Therefore, this study aims to utilize rubber wood bark to produce biofuel. Fly ash catalyst is employed to expedite the biofuel production process. The testing methods used to analysis the characteristics of rubber wood bark include proximate analysis and calorific value analysis. Proximate analysis of rubber wood bark yielded the following values: moisture content of 6.39%, ash content of 4.61%, volatile matter of 71.41%, and fixed carbon of 17.59%. The calorific value of rubber wood bark was determined to be 4200.00 calories per gram. Meanwhile, the characteristics of coal fly ash used as a catalyst were analyzed using X-Ray Fluorescence (XRF) or X-ray diffraction. The analysis revealed the presence of silicon dioxide (SiO2) at 49.21%, aluminum oxide (Al2O3) at 16.22%, iron (III) oxide (Fe2O3) at 5.49%, calcium oxide (CaO) at 7.37%, magnesium oxide (MgO) at 1.72%, and potassium oxide (K2O) at 0.50%. The analysis of rubber wood bark and coal fly ash indicates that rubber wood bark can be used as a raw material for biofuel production, while coal fly ash can serve as a catalyst.
Increasing the Photochemical Performance of Dye-Sensitized Solar Cell: The Effect of Mixed Dye from Areca Catechu and Tectona Grandis Extract Ahmad, Ali; Hasan, Abu; Bow, Yohandri
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 4 No. 3 (2024): IJRVOCAS - December
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v4i3.301

Abstract

Dye Sensitized-Solar Cells (DSSC) represent a solar cell technology belonging to the third generation, functioning on the principles of the photoelectrochemical concept. The utilization of teak leaves (Tectona Grandis) and areca nut (Areca Catechu) as an organic dye in DSSC is accountable for the absorption of solar radiation. The stimulation of electrons induced by light in photocatalysis is greatly impacted by the band gap's specific location. For a material to act efficiently as a photocatalyst, it must possess a conduction band exhibiting a notably high positive potential in comparison to the potential of electron acceptance. The mixed of dye from teak leaves and areca nut increasing the absorption of the sunlight, thereby enhancing light absorption. The current study details the Mixing of areca nut and teak leaves extract to enhance the photochemical performance of DSSC and subsequently examined via FTIR, and UV-Vis analyses. A thorough examination of samples from mixed dye significantly impacts the elemental composition, and optical characteristics of the substance. The outcomes revealed that mixed dye from areca nut and teak leaves exhibited the most notable enhancement in DSSC efficiency, followed by teak leaves dye, whereas the areca nut dye demonstrated least performance potential. These findings offer valuable insights towards optimizing dye to boost the efficiency of DSSC.
Development and Engineering of a Portable Vertical Wind Turbine for Lakefront Areas Kurniawan, Ricky; Kusumanto, RD.; Carlos, R.S.
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 4 No. 3 (2024): IJRVOCAS - December
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v4i3.303

Abstract

Energy consumption is increasing daily and is heavily dependent on non-renewable energy sources, particularly petroleum, which is now dwindling in supply and becoming more costly to produce. There are numerous types of renewable energy that are plentiful, cost-effective, and environmentally friendly. To replace non-renewable fuels, the development of renewable energy must be prioritized. This research aims to prevent future energy shortages. By developing energy conversion devices, renewable energy can be optimally utilized in Indonesia to meet human energy needs. One such renewable energy source we encounter daily is wind energy. For instance, wind energy holds significant potential for use in lake regions. Lakefront areas frequently harness wind energy using windmills. The Savonius wind turbine, known for its ease of construction, is a practical windmill design. Its advantage lies in its ability to start rotating at low wind speeds.
The Impact of Using Bamboo Activated Carbon as Counter Electrode and Dye from Suji Leaf toward the Efficiency of Dye Sensitized Solar Cells Ismail, Muhammad Fakhri; Taqwa, Ahmad; Kusumanto, R.D
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 4 No. 3 (2024): IJRVOCAS - December
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v4i3.304

Abstract

Dye-sensitized solar cells (DSSCs) have attracted great interest due to their ability to convert solar energy into electricity cost-effectively and efficiently. This study aims to create Dye-Sensitized Solar Cells (DSSCs) by utilizing bamboo activated carbon as the counter electrode and natural dyes derived from suji leaves as photosensitizers. Bamboo activated carbon was chosen because of its sustainable nature, large surface area, and excellent conductivity. Likewise, suji leaf dye was chosen because of its capacity to absorb various wavelengths of light. These materials were analyzed using UV-Vis spectroscopy, XRD, and SEM to determine their structure and characteristics. The results of the DSSC efficiency showed that using bamboo activated carbon as the counter electrode produced the highest energy conversion efficiency of 0.0000896%, surpassing the achievement of carbon black electrodes, which only reached 0.0000505%.
Conversion of Wasted Oil to Biodiesel Using CaO from Chicken Egg Sheets as a Catalist Jabborov, Behzod; Syarif, Aida; Yerizam, Muhammad
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 4 No. 3 (2024): IJRVOCAS - December
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v4i3.311

Abstract

This research explores the use of used cooking oil as a primary feedstock in biodiesel production, with the addition of a calcium oxide (CaO) catalyst derived from eggshells. The process begins by filtering the used cooking oil to remove impurities, after which the oil undergoes tests to assess its density, viscosity, acid number, free fatty acid content, and water content. These initial steps are crucial to ensure the quality and readiness of the oil for further processing. Following this, the CaO catalyst is produced from eggshells through an impregnation process, a method that allows the transformation of eggshells into an effective catalyst. The study employs a heterogeneous catalyst system, where the CaO catalyst, characterized by its micro-sized particles, is used in the transesterification process. This approach is chosen as an alternative to the conventional use of homogeneous catalysts, providing potential advantages in terms of reusability and environmental impact. The production of biodiesel is conducted in two main stages: esterification and transesterification. In both stages, the CaO from eggshells is utilized as a catalyst, and the filtered used cooking oil serves as the raw material for biodiesel synthesis. The research identifies the optimal conditions for biodiesel production, which include heating the mixture to a temperature of 900°C, using a CaO catalyst amounting to 1% of the weight of the used cooking oil, and maintaining a reaction time of 60 minutes. Under these conditions, the study achieved a biodiesel yield of 62.17%. This research highlights the effectiveness of using waste materials such as eggshells and used cooking oil in producing biodiesel, offering a sustainable and environmentally friendly alternative to traditional methods.
The Moisture Content of Robusta Coffee Beans is dried in the Sun and the Room Temperature is measured with a Microcontroller-based Moisture Content Analyzer Tompunu, Alan Novi; Hafizhah, Tamara; Handayani, Marta Tika
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 4 No. 3 (2024): IJRVOCAS - December
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v4i3.330

Abstract

The water content of coffee beans plays an important role in the coffee industry. The water content of fresh coffee beans is still high so it needs to be reduced to meet the SNI standard or around 11-12%. Reducing the water content of coffee beans can be done by drying them in the sun and at room temperature. There is no tool made to measure the water content of coffee beans. This study created a microcontroller-based coffee bean water content measuring tool. Measurements were made on robusta coffee beans. Water content measurements were carried out on coffee beans that were dried in the sun for three days and at room temperature for seven days. Water content measurements were also carried out using the AR991 water content measuring tool as a comparison. From the results of measurements using a microcontroller-based water content measuring tool, it was found that the water content of coffee beans dried in the sun decreased day by day starting from 23% on the first day and 10% on the third day. From the AR991 water content measuring tool, it was found that the water content of coffee beans was 23.3% on the first day and 11.9% on the last day. The moisture content of coffee beans dried at room temperature has a moisture content of 22% on the first day and 11% on the last day using a microcontroller-based moisture meter. While the results of measuring the moisture content of coffee beans using the AR991 moisture meter are 23.3% on the first day and 12% on the last day.
Implementation of the Adiwiyata School Program in Improving Environmental Care Character at SDN 2 Senawar School Musi Banyuasin Regency Susanti, Marlina Kiran; Widowati, Atri; Destrinelli
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 4 No. 3 (2024): IJRVOCAS - December
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v4i3.336

Abstract

SDN 2 Senawar School Receives an Award from the South Sumatra Provincial Environmental Service as an Environmental Education Center. In addition to having general school facilities, SDN 2 Senawar also has several facilities related to environmental management efforts. Most of these school facilities are well maintained and used as learning facilities for students. The results of the researcher's observations regarding the implementation of Adiwiyata at SDN 2 Senawar are seen from 18 indicators. The researcher used a checklist sheet to see the suitability of the implementation of Adiwiyata in the field with the assessment sheet that had been made by the researcher. The results of the observation obtained a total score of 87 at the South Sumatra Province level. This value shows that the implementation of Adiwiyata at SDN 2 Senawar is classified as good. This shows that 85% of the Adiwiyata implementation indicators have been implemented well. Evidence in the field also shows that SDN 2 Senawar strongly supports efforts to improve environmental behavior among students and school residents.
Implementation of Environmental Parameter Control System in Green House to Increase Vegetable Production Amelia, Afritha; Sundawa, Bakti Viyata; Roslina; Rahman, Rahimah Abdul
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 4 No. 4 (2024): IJRVOCAS - Special Issues - International Conference on Science, Technology and
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v4i4.308

Abstract

The use of green houses in plant cultivation is one way to approach optimal conditions for plant growth. Green houses are generally useful for protecting plants from extreme air temperatures. This requires further study of the smart features that will be built to support the concept of greenhouse agriculture. The development of automation technology is expected to help the monitoring system of parameters that affect the production of vegetable crops such as air temperature, and air humidity. These parameters will be monitored remotely using the Internet of Things (IoT) method. Based on the measurement results from the location at POLMED campus. For Medan Selayang the maximum temperature is 26.4oC and humidity is 68.8%. For the location in Medan Johor the maximum temperature is 25.4oC and humidity is 68.1%. For Medan Baru location, the maximum temperature is 25.1oC and humidity is 68.3%. For Medan Helvetia location, the maximum temperature was 24.7oC and humidity was 69%. Based on the test results, the temperature and humidity parameters can be monitored remotely by 106.4 km via the internet.

Page 19 of 23 | Total Record : 221

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