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All Journal Reaktor Teknotan: Jurnal Industri Teknologi Pertanian TELKOMNIKA (Telecommunication Computing Electronics and Control) Jurnal Ekonomi Syariah Teori dan Terapan JTERA (Jurnal Teknologi Rekayasa) Eksakta : Berkala Ilmiah Bidang MIPA TELKA - Telekomunikasi, Elektronika, Komputasi dan Kontrol Jurnal Material dan Energi Indonesia Jurnal Ilmu dan Inovasi Fisika
Setianto Setianto
Departemen Fisika, FMIPA, Universitas Padjadjaran
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Other

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Analysis of Air Preheater Effectiveness using The Number Transfer Unit (NTU) Method Before and After Overhaul of Unit 2 of The West Java Palabuhan Ratu PLTU Fitriyani, Elsa; Nurhilal, Otong; Setianto, Setianto
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 10, No 2 (2026)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v10i2.71545

Abstract

The air preheater (APH) is a heat exchanger component that plays a crucial role in improving boiler combustion efficiency through the reuse of hot exhaust gases. Continuous use of the APH at the Jabar 2 Palabuhan Ratu PLTU can lead to a decline in performance, characterized by reduced heat transfer effectiveness. To restore APH performance, an overhaul was performed, including cleaning and replacing the elements. The analysis was based on actual operating data by comparing pre- and post-overhaul conditions at nearly equivalent loads using the NTU-effectiveness method, as well as calculating the effect of O₂-based air leakage. The results showed that the overhaul improved the APH's performance. Under pre-overhaul conditions with a load of 333.86 MW, the effectiveness value was 85.04%, increasing to 87.72% at a load of 329.75 MW after the overhaul. At a load of 336.98 MW, the effectiveness increased from 85.68% to 87.30% at a load of 346 MW after the overhaul. At a load of 284.33 MW, the effectiveness increased from 85.82% to 87.10% at a load of 282.99 MW after the overhaul. Furthermore, the air leakage value decreased from 13.54% to 11.47% after the overhaul.
Synthesis of Solar Panel Cooling Devices from A Mixture of Paraffin and Coconut Shell Activated Carbon Nurhilal, Otong; Sekarwati, Dyah; Daniel, Fritz; Gultom, Noto Susanto; Setianto, Setianto
Teknotan: Jurnal Industri Teknologi Pertanian Vol 20, No 2 (2026): TEKNOTAN, Agustus 2026
Publisher : Fakultas Teknologi Industri Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jt.vol20n2.5

Abstract

Coconut shell is a plantation waste that has the potential as an activated charcoal material due to its high lignocellulose content. Coconut shell activated charcoal (CSAC) is made through a carbonization process and chemical and physical activation. CSAC has been used in several applications such as adsorbents and electrode components. In this study, CSAC was used as a passive coolant mixture of Phase Change Material (PCM) from paraffin wax (PW). CSAC was made from charcoal that was carbonized at a temperature of 700oC and activated with ZnCl2. CSAC testing included specific surface area, diffraction patterns, functional groups and surface morphology. The results of the N2 isothermic test on CSAC obtained a specific surface area of 420.22 m2/g, a total pore volume of 0.22 cm3/g and an average pore diameter of 2.13 nm. The results of the XRD test showed the nature of CSAC with an amorphous polycyclic aromatic carbon structure. The results of the FTIR test showed aliphatic C–H functional groups derived from the remaining hydrocarbon chains of the cellulose and lignin structures. The C–O, O–H functional groups have been formed which indicates that activated carbon has been formed. The results of the SEM test showed a hollow surface with pore sizes dominated by mesoporous structures. Furthermore, CSAC was added to PCM-PW with a ratio of 5%:95% and 10%:90%. The test results showed an increase in the thermal conductivity of PCMCSAC. The use of SPPCMCSAC in solar panels has succeeded in reducing the surface temperature of solar panels by about 10oC and increasing efficiency by about 10%. The test results of SPPCMCSAC on solar panels demonstrate the ability of SPPCMCSAC to maintain solar panel efficiency.
Co-Authors A.A. Ketut Agung Cahyawan W Abdurrohman Abdurrohman Andri Abdurrochman, Andri Annisa Aprilia Arif Choerudin Suanda Aswad H.S Aswad H.S Aswad H.S. Aswad Hi Saad Aswad Hi Saad Azka, Muhamad Fauzan B.M Wibawa Bambang Mukti Wibawa Bambang Mukti Wibawa Bambang Mukti Wibawa Bambang Mukti Wibawa Bambang Wijatmoko Budy Santoso Cinan, Sena Patriarka Daniel, Fritz Darmawan Hidayat E Supriyana Faizal, Ferry Fitrilawati Fitrilawati Fitriyani, Elsa Ganjar Nurohman H Mohammad Imran Hilman Mohammad Jajat Yuda Mindara JAJAT YUDA MINDARA, JAJAT K.M Liul K.M. Liu Kuwat T Liu K.M Liu Kin Men Lusi Safriani M F Rosyid M U Hasanah MUHAMMAD ARYA REVANSYAH Nendi Suhendi Nendi Suhendi Nendi Suhendi Syafei Noto Susanto Gultom Otong Nurhilal Pratama, Rendy Putra Ramadzin, Rafly Riszekiya, Egis Sahrul Hidayat Sekarwati, Dyah Suanda, Arif Choerudin Suhanda, Anda Tika Widiastuti Triamada, David Wahyu Alamsyah WAHYU ALAMSYAH, WAHYU Wibawa, Bambang Mukti