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All Journal SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Indonesian Physical Review Community Development Journal: Jurnal Pengabdian Masyarakat Jurnal Teknik Industri Terintegrasi (JUTIN) JURNAL PENDIDIKAN SAINS SOSIAL DAN AGAMA
Kartika, Siska Ayu
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Religion Humanities Automotive Engineering Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Public Health Other

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Energy saving analysis using burner /thermal tank and heater electric in the marine fuel oil (mfo) treatment process Kartika, Siska Ayu; Abdullah, N.H.; Saksono, P.
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 17, No 1 (2023): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.17.1.7-16

Abstract

Energy savings in Diesel Power Plants (PLTD) have been carried out by comparing the Marine Fuel Oil (MFO) processing process when using a burner/thermal tank and an electric heater. Energy savings are analyzed in this study by calculating the comparison of operational costs, cost efficiency and processing time. The place of research was carried out in one of the Diesel Power Plants in Indonesia, with the object of research being an electric heater and a burner/thermal tank. The research method used quantitative methods in the form of literature study, observation, and field testing. The research was conducted by collecting data on temperature, humidity, and fuel consumption when testing the MFO treatment every 1 hour until the specified temperature was reached 94-96°C. Based on the research results, the processing of MFO using a burner/thermal tank is more efficient in terms of time at the beginning of processing, with a savings of 17.2% and in terms of operational costs more efficient 11.67%. However, after the process continued for 7 days, MFO processing using an electric heater was more efficient in terms of operating costs by 31.87%.
SYNTHESIS AND CHARACTERIZATION OF BARIUM HEXAFERRITE (BHF) COMPOSITE MATERIALS DOPING FLY ASHES, PORLAND CEMENT, VERMICULITE, CRISTALLINE SILICA AS FIRE PROOFING PROTECTION ON STEEL BEAM IN THE OIL REFINERY INDUSTRY Harahap, Veryyon; Kartika, Siska Ayu
Jurnal Pendidikan, Sains Sosial, dan Agama Vol. 10 No. 2 (2024): Jurnal Pendidikan, Sains Sosial, dan Agama
Publisher : STABN RADEN WIJAYA WONOGIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53565/pssa.v10i2.1694

Abstract

In the modern era, the use of technology and fire protection equipment has become part of the needs of the oil refinery industry. This material functions to retain heat from fire with a temperature of 1000 oC. But apart from the convenience provided, it turns out that this material also has negative effects on the body that is exposed to dust. In this research, a composite-based heat-resistant material will be made from natural red sand with a ratio of 50:50 (wt%) between matrix and filler. Composite preparation has been carried out using the wet milling method with toluene media. Barium M-Ferrite as matrix and Fly Ashes, Porland Cement, Vermiculite, Cristalline as fillers which are used as the main raw materials for making composites. From the results of the X-Ray Diffraction (XRD) test on BaFe12O19 powder as a matrix, it shows that the phase formed by a single face and hexagonal crystal structure has lattice parameters a=5.929 Ǻ and c= 23.41 Ǻ space group (P 63/mmc); hexagonal structured composite samples (JCPDS file No. 39-1433). The results of surface analysis using Scanning Electron Magnetic (SEM) show that the composite has the finest and smallest particle sizes. The true density result of the composite is 5.386364 g/cm3.
SYNTHESIS OF SINGLE-PHASE HYDROXYAPATITE POWDER FROM EGGSHELL WASTE VIA CO-PRECIPITATION METHOD AND ITS STRUCTURAL CHARACTERIZATION Musyarofah, Musyarofah; Mahera, Adinda Kholif; Tajalla, Gusti Umindya Nur; Nafisah, Azmia Rizka; Prayitno, Budi; Norhidayah, Siti; Kartika, Siska Ayu
Indonesian Physical Review Vol. 8 No. 3 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i3.451

Abstract

This study aims to synthesize a single-phase hydroxyapatite powder using waste chicken eggshells as a calcium source via the co-precipitation method. The process focuses on optimizing calcination time and temperature to achieve high-purity hydroxyapatite.  The co-precipitation procedure involved controlled pH adjustment and aging time, contributing to the formation of homogeneous particles. Chicken eggshells, predominantly composed of calcium carbonate (CaCO3), were calcined at 1000°C for 15 hours to produce calcium oxide (CaO). The resulting CaO was then reacted with phosphate ions in an aqueous solution, followed by a calcination at 900°C for varying holding times of 5 and 10 hours. X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and Brunauer-Emmett-Teller (BET) analysis were conducted to evaluate phase composition, crystal size, and texture properties. The optimum condition was found at 900 °C for 10 h calcination, resulting in single-phase hydroxyapatite, a crystallite size of 220 nm, an average pore radius of 6.78 nm, a total pore volume of 0.02 cc/g, a surface area of 6.38 m2/g, and an average particle radius of 213.89 nm. These findings highlight the potential of this method for producing bioceramics with desirable properties for use in bone grafts and other biomedical materials.
THE EFFECT OF CALCINATION TEMPERATURE AND HOLDING TIME ON STRUCTURAL PROPERTIES OF CALCIA POWDERS DERIVED FROM EGGSHELL WASTE Prayitno, Budi; Musyarofah, Musyarofah; Tajalla, Gusti Umindya Nur; Nafisah, Azmia Rizka; Norhidayah, Siti; Kartika, Siska Ayu
Indonesian Physical Review Vol. 8 No. 1 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i1.450

Abstract

This study investigates the effects of calcination temperature and holding time on the structural properties of calcia (CaO) powders. The raw material used in this study is chicken eggshell waste, which was cleaned, dried, ground, and sieved for uniform particle size. The synthesis of calcia powder was performed by calcining the powder at 900°C and 1000 °C for 5, 10, and 15 hours. XRD, BET, and SEM analyses were employed to evaluate crystal structure, textural properties, and microstructure of the calcined powders. The Rietveld analysis reveals the identified crystalline phases were calcia up to 95.6 mol% and calcium hydroxide as secondary phase. Results indicate that higher calcination temperatures and extended holding times increase particle size and reduce BET surface area, significantly altering pore size distribution. Specifically, elevated temperatures promote sintering and grain growth, leading to smaller average pore radii and decreased total pore volume. The BET surface area ranges from 7.431 m2/g to 1.772 m2/g for samples calcined at 900 °C and from 3.202 m²/g to 0.711 m²/g for samples calcined at 1000 °C. Correspondingly, the average particle radius increases from 183.51 nm to 769.55 nm at 900 °C and from 425.83 nm to 1918.10 nm at 1000 °C as the holding time extends. BJH analysis reveals that longer holding times broaden pore size distribution due to the merging of smaller pores.
ENHANCEMENT OF PUBLIC AWARENESS ON ENVIRONMENTALLY FRIENDLY ENERGY CONVERSION Effendi, Ryan; Kartika, Siska Ayu; Rusba, Komeyni; Utama, Satrio Darma
Community Development Journal : Jurnal Pengabdian Masyarakat Vol. 5 No. 2 (2024): Volume 5 No. 2 Tahun 2024
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cdj.v5i2.27879

Abstract

Penelitian ini bertujuan untuk meningkatkan kesadaran masyarakat terkait konversi energi ramah lingkungan. Fokus utama adalah melakukan tinjauan literatur yang komprehensif untuk mengevaluasi berbagai strategi yang telah digunakan dalam meningkatkan kesadaran masyarakat terhadap energi ramah lingkungan. Metode analisis literatur digunakan untuk mengidentifikasi pendekatan yang paling efektif dalam menyebarkan informasi dan mengubah perilaku masyarakat terkait penggunaan energi. Hasilnya menggarisbawahi pentingnya pendekatan edukasi, kampanye publik, serta keterlibatan komunitas dalam menciptakan perubahan yang berkelanjutan. Penelitian ini menyimpulkan bahwa pendekatan holistik yang melibatkan berbagai pihak menjadi kunci dalam meningkatkan kesadaran masyarakat terhadap konversi energi ramah lingkungan
Penerapan Teknologi Realitas Virtual untuk Pelatihan Keselamatan Pekerja dalam Operasi Mesin Industri Berat Effendi, Ryan; Zulfikar, Iwan; Rusba, Komeyni; Kartika, Siska Ayu; Utama, Satrio Darma
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 7 No. 2 (2024): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v7i2.26651

Abstract

The application of Virtual Reality (VR) technology in worker safety training in heavy industries has been an intriguing subject of research in recent years. This journal article aims to provide a literature review on how VR is utilized in this context. The literature review method is employed to gather, evaluate, and synthesize findings from various related studies. This literature review reveals that the use of VR has proven effective in enhancing worker safety and operational skills in various heavy industries. By enabling training in a simulated virtual environment, VR technology can deliver realistic experiences without actual physical risks. Previous studies indicate that workers who receive VR training tend to have a better understanding of potential risks and safety procedures, leading to a decrease in accident rates. The advantages of VR also include its ability to provide repeatable training without significant additional costs. This allows workers to gain consistent hands-on experience, reinforcing their skills in hazardous situations. Thus, the use of VR in worker safety training in heavy industries promises significant benefits in efforts to improve worker safety and well-being.
Co-Authors Abdullah, N.H. Budi Prayitno Effendi, Ryan Harahap, Veryyon Iwan Zulfikar Komeyni Rusba Mahera, Adinda Kholif Musyarofah Musyarofah, Musyarofah Nafisah, Azmia Rizka Norhidayah, Siti Saksono, P. Satrio Darma Utama Tajalla, Gusti Umindya Nur