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All Journal Journal of Mechanical Science and Engineering AUSTENIT Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal Mechanical Science and Technology Indonesia Jurnal Teknik Kimia Unram Journal of Community Service (UJCS) SRIWIJAYA JOURNAL OF ENVIRONMENT Makara Journal of Science International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS)
Agung Mataram
Universitas Sriwijaya
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Physics Public Health Social Sciences

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STUDY OF EXHAUST GAS RESIDUAL HEAT CONVERSION HRSG PLTGU KERAMASAN TO ELECTRICAL ENERGY WITH GENERATOR THERMOELECTRIC TECHNOLOGY Firmansah, Hari; Bizzy, Irwin; Mataram, Agung; Sipahutar, Riman
AUSTENIT Vol. 15 No. 2 (2023): AUSTENIT: October 2023
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/austenit.v15i2.6745

Abstract

The Heat Recovery Steam Generator (HRSG) is a combination of a Gas Power Plant (PLTG) and a Steam Power Plant (PLTU), this plant utilizes exhaust gas from the PLTG to produce steam as the working fluid in the PLTU. The residual heat from the heating process at the HRSG is channeled into the chimney, and the remaining heat from the exhaust gas can be converted into electrical energy with the Thermoelectric Generator (TEG) module. This research was carried out by installing the TEG module in series on the surface of the HRSG chimney wall, using laboratory scale measurements. The heat source uses a heater with a total power of 2,000 W. The research results show that the TEG module can convert the residual heat energy of the exhaust gas from the HRSG chimney into electrical energy. Four TEG modules mounted on the chimney surface can generate a voltage of 0.83 V and a maximum power of 2.79 mW. These results indicate that the TEG module is an opportunity to convert heat energy into electrical energy for further development.
ANALISIS KARAKTERISTIK MEMBRAN PENGOLAHAN AIR DARI BAHAN POLYETHERSULFONE DENGAN PENAMBAHAN PERAK NITRAT Agung Mataram; Nasution, J.D; Bizzy, I; Mohruni, A.S; Rizal, S; Pataras, M; Kurnia, A.Y; Kurnia, R.D; Jambak, M.I; Bactiar, M; Sutanto, H
AUSTENIT Vol. 16 No. 1 (2024): AUSTENIT: April 2024
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/austenit.v16i1.8614

Abstract

In this research, the membrane was made from polymers made from Polyethersulfone (PES), Silver Nitrate (AgNO3) strengthening agent, and additional solvent N,N-Dimethylformamide (DMF). The comparison in each sample is 1.5wt%, 2wt%, and 2.5wt%. The solution is connected to DC electricity with a voltage of 15000V for 30 seconds. The tensile test shows that as the mixture concentration increases, the membrane tensile strength or the membrane's ability to withstand loads tends to decrease, where the PES@AgNO3 membrane with a concentration of 1.5wt% has the highest average tensile strength value, namely 5.74206 MPa, then the value The lowest average tensile strength was found in the PES@AgNO3 membrane with a concentration of 2.5wt%, namely 3.07480 MPa. The decrease in the tensile strength value was caused by the uneven distribution of pores and agglomeration formed so that when the tensile test was carried out the membrane became more brittle and breaks easily. In the CWP test, there was a significant decrease in flux results with variations in membrane concentration, where when the PES@AgNO3 membrane mixture concentration was 1.5wt%, the highest flux value reached 3.88797 L.m-2.h-1.bar-1, inversely proportional to the increasing the concentration of the membrane mixture, namely 2.5wt%, obtained the lowest flux value, namely 1.01345 L.m-2.h-1.bar-1.
The Enhancement of Teacher Competency Through Assistance in Creating Augmented Reality-Based Interactive E-Modules at SMAN 10 Palembang Sriyanti, Ida; Marlina, Leni; Mataram, Agung; Sanjaya, Muhammad Rudi; Syahputri, Selvia Mariska; Dani, Rahma; Almafie, Muhammad Rama
Unram Journal of Community Service Vol. 6 No. 4 (2025): December
Publisher : Pascasarjana Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ujcs.v6i4.1269

Abstract

Educational transformation in the Industrial Revolution 4.0 era demands that teachers adapt to digital technology and develop innovation-based learning. However, the results of a preliminary survey indicated that a majority of teachers at SMAN 10 Palembang lacked skills in creating digital learning media and were unfamiliar with Augmented Reality (AR) technology. This community service activity aimed to improve teacher competence through mentoring in the creation of AR-based interactive e-modules as a 21st-century learning innovation. The implementation methods included socialization, technical training, a coaching clinic, and an evaluation of outcomes using a pre-test, post-test, and a participant satisfaction survey. Fifteen teachers actively participated in this activity. The paired sample t-test analysis revealed a significant increase between the pre-test (M = 47.00; SD = 7.75) and post-test scores (M = 91.67; SD = 4,87), with t = –18.506, p = 0.000 (p < 0.05). And the Cohen’s d = 9.35, categorized as a very large effect. This finding demonstrates that the mentoring program was effective in enhancing teacher competence in developing AR-based interactive e-modules. Furthermore, the results of the participant satisfaction survey reinforced the program's effectiveness. A total of 73.3% of participants stated they were "very satisfied" with the quality of the mentoring and facilitators, while 80% felt their e-module creation skills had significantly increased. Regarding the AR integration aspect, 87% of participants expressed high satisfaction with the clarity of the training and the implementation results. Meanwhile, 67% rated the activity as having a direct impact on enhancing their instructional technology integration skills. All participants demonstrated a high commitment to sustainably implementing the training outcomes in their respective schools. Consequently, this program is proven to have a positive impact on enhancing digital literacy, pedagogical competence, and teacher readiness to face the challenges of 21st-century, technology-based learning.
Preparation of Polyacrylonitrile-Polyethersulfone Nanofibers Loaded with Reduced Graphene Oxide from Palm Kernel Shell forWastewater Filtration Dani, Rahma; Almafie, Muhammad Rama; Mataram, Agung; Lamura, M. Danny Pratama; Akhsan, Hamdi; Marlina, Leni; Fudholi, Ahmad; Ismail, Ahmad Fauzi; Sriyanti, Ida
Science and Technology Indonesia Vol. 11 No. 2 (2026): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2026.11.2.457-480

Abstract

The development of Polyacrylonitrile (PAN)–Polyethersulfone (PES) nanofiber membranes loaded with Reduced Graphene Oxide (rGO) offers an innovative and sustainable solution for water filtration. This study synthesized and characterized PAN–PES loaded rGO nanofiber membranes using an electrospinning technique. A PAN–PES mixture (8:2 mass ratio) at 10–20 wt% served as the matrix, with 48 mg of rGO added. The membranes were analyzed using scanning electron microscopy, Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), mechanical testing, water absorption, immersion resistance, and clean water permeability (CWP). The resulting nanofibers exhibited defect-free, bead-free, and uniform morphology with diameters ranging from 389 to 757 nm. FTIR confirmed hydrogen bonding between PAN–PES and rGO, while XRD showed sharp peaks with a maximum crystallinity of 33.52%. The membrane displayed a Young’s modulus of 57.83 MPa and remained stable after 32 days of immersion. It demonstrated superhydrophilic behavior with a contact angle of 72.4o to 74.3o, sustaining a stable water flux at 6.0 bar for 60 min, yielding a permeability of 3.25 to 23 L/m2.h.bar and an equilibrium water content of 69 to 91%. Surface morphology before and after wastewater filtration revealed effective contaminant capture and strong antifouling resistance. These results confirm that PAN–PES loaded rGO nanofiber membranes possess excellent mechanical stability, high permeability, and superior wettability, providing a promising pathway for advanced, sustainable water filtration applications.
Co-Authors A.F. Ismail Aditya, B. B. Ahmad Fauzi Ismail Ahmad Fudholi Aldi, Muhamad Abel Kirana Alian, H. Alisya, Rona Almafie, Muhammad Rama Amrifan Saladin Mohruni Anisya, N. Bactiar, M Baehaqi Bizzy, I Dani, Rahma Elsa Rama Lumban Gaol Firmansah, Hari Gaol, Elsa Rama Lumban Hamdi Akhsan Helmy Alian Hermansyah Hermansyah Hermansyah Ida Sriyanti Idjan, Meutia Kamilatun Nuha Ap Irsyadi Yani Irwin Bizzy Ismet Ismet, Ismet Jambak, M.I Kurdiati, Lintang Auliya Kurnia, A.Y Kurnia, R.D Lamura, M. Danny Pratama Leni Marlina Ludiansyah, Anggi Lugantha Perkasa M. Badaruddin M.I. Jambak, M.I. Mediana, Meta Meta Mediana Mohruni, A.S Mohruni, A.S. Nanda Yusril Mahendra Narwi Panggar Besi Nasution, J. D. Nasution, J.D Nukman Nukman Pataras, M Pataras, M. Praja Dilla Atos Qomarul Hadi Riman Sipahutar Rizal, S Rizal, S. Romli Romli, Romli Sanjaya, Muhammad Rudi Subriyer Nasir Subriyer Nasir Susi Susanti Susi Susanti Sutanto, H Syahputri, Selvia Mariska Zamheri, Ahmad