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Ranteallo, Obet
Universitas Cenderawasih
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Simulation Modeling of 140 MW CCGT Quality Indicators Based on DIN-VDI 4661 Standard Using Ebsilon® Professional Software Kaiway, Mickael Ruben; Giai, Agustinus; Griapon, Nourish Christin; Tosuli, Yohanis Tangke; Ranteallo, Obet Takke; Siregar, Samuel Parlindungan; Wanane, Yohanis Yulius; Pongsapan, Allo Sarira; Werdhani, Anastasia Sri; Palamba, Pither; Numberi, Johni Jonatan
G-Tech: Jurnal Teknologi Terapan Vol 9 No 2 (2025): G-Tech, Vol. 9 No. 2 April 2025
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/gtech.v9i2.6614

Abstract

The operational efficiency of mid-capacity (140 MW) Combined Cycle Gas and Steam Power Plants (CCGT) remains underexplored concerning the DIN-VDI 4661 standard, which defines key quality metrics for energy systems. Addressing this gap is crucial for establishing standardized benchmarks to optimize performance and reduce energy losses. Existing studies mainly focus on Combined Cycle Gas Turbine (CCGT) units outside the 100–180 MW range and often do not explicitly follow DIN-VDI 4661, limiting efficiency comparisons and hindering targeted optimizations. This study simulates a 140 MW CCGT using Ebsilon® Professional software, incorporating DIN-VDI 4661 guidelines to assess eight quality indicators, including thermal efficiency, fuel utilization, and power-to-heat ratio. The model integrates gas and steam turbines, heat recovery, and auxiliary components, with input parameters validated against industry data. Energy balance analysis and sensitivity tests identified loss points. Results show a gas turbine thermal efficiency of 31.39%, steam turbine efficiency of 39.59%, and total system efficiency of 48.42%. However, significant energy losses (52% of input energy) were observed, mainly in gas turbines (87,000 kW) and steam turbines (56,000 kW). These findings highlight the need for design optimizations, such as improving heat recovery and turbine efficiency, to meet DIN-VDI 4661 benchmarks.
SOSIALISASI PENGUNAAN PAHAT POTONG INSERT BAGI WORKSHOP USAHA BUBUT DI KOTA JAYAPURA Ranteallo, Obet; Kaiwai, Ruben M.; Patabang, Djuarensi
Jurnal Abdi Insani Vol 12 No 7 (2025): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v12i7.2610

Abstract

The machining industry, particularly lathe workshops, plays a vital role in supporting the manufacturing and machinery repair sectors in Jayapura City. However, many small-scale workshops still rely on conventional cutting tools due to limited knowledge and access to modern tool technologies such as insert cutting tools. Insert tools offer several advantages, including ease of insert replacement, longer tool life, and more precise and efficient cutting results. This community service activity aims to enhance the knowledge and technical skills of lathe workshop operators in Jayapura City through outreach and training on the use of insert cutting tools. Many local workshops still use conventional tools, which have limitations in terms of efficiency and cutting quality. Therefore, this program is designed to introduce modern, economical, and practical insert tooling technology. The method used involves an educational-participatory approach through lectures, demonstrations, hands-on practice, and interactive discussions. The program encourages active participation to ensure that knowledge of insert tool usage can be effectively applied in workshop operations. The results of the program show a significant improvement in participants’ understanding, with an average post-test score increase of 35% compared to the pre-test. Participants also expressed strong interest in adopting insert tools for their production processes. During the hands-on session, they were able to correctly operate and replace the insert tools. The discussions were lively, indicating high enthusiasm for the topics presented. Overall, this activity has had a positive impact on enhancing the technical capacity of small and medium-sized lathe workshops in Jayapura City.
CHARACTERISTICS OF COMBUSTION AND PHYSICAL PROPERTIES OF COFFEE GROUNDS AND SAGO PULP BRICKS WITH SAGO FLOUR BINDER Haurissa, Calvion Jean; Joni, Joni; Ranteallo, Obet Takke; Numberi, Johni J; Palamba, Phiter; Karapa, Enos; Haurissa, Jusuf
Jurnal Rekayasa Mesin Vol. 16 No. 2 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

This study examines the production of briquettes based on agricultural waste from sago pulp and coffee grounds using natural sago flour as a binder, through a laboratory experimental approach. The analysis covers the physical and chemical characteristics, as well as the thermal performance of 3 cm cube-shaped briquettes. The results show that coffee pulp briquettes have the highest heat transfer rate (0.528 Watts) and the highest calorific value (5018 kcal/kg), indicating superior combustion efficiency compared to sago pulp briquettes (0.205 Watts; 4856 kcal/kg) and mixed briquettes (0.347 Watts; 4966 kcal/kg). These differences in characteristics were influenced by the composition of the materials, while the size of the briquettes affected the ignition time. Overall, all types of briquettes showed potential as an environmentally friendly alternative energy source based on local biomass.
Co-Authors Agustinus Agustinus Agustinus Giai AKBAR SILO Allo Sarira Pongsapan Anastasia Sri Werdhani Costantinus Oei Costantinus Oei David Mangallo David Mangallo Djuarensi Patabang Dultudes Mangopo Endang Hartiningsih Endang Hartiningsih Enos Tambing Frans Robert Bethony Griapon, Nourish Griapon, Nourish Christin Haurissa, Calvion Jean Haurissa, Jusuf Johni J Numberi Joni Karapa, Enos Manalu, Janviter Mangopo, Dultudes Maran Gultom Maran Gultom Marthen Liga Marthen Liga Mickael Ruben Kaiway Oktavianus Kati Palamba, Phiter Patabang, Djuarensi Pither Palamba Pither Palamba Rombe Allo Rumar, Kristofel Safanpo, Apolo Samuel Parlindungan Siregar Selyus Rantepulung Thobby Wakarmamu Thomas Pagasis Tosuli, Yohanis Tangke Wambrauw, Oscar O. Wanane, Yohanis Wanane, Yohanis Yulius Werdani, Anastasia Sri Werdhani, Anastasia Sri Yafet Bontong Yakobus Kariongan Yane Oktovina Ansanay Yohanis Tangke Tosuli