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All Journal International Journal of Electrical and Computer Engineering International Journal of Renewable Energy Development Rotasi Jurnal Teknologi Reaktor Nuklir Tri Dasa Mega JURNAL TEKNIK MESIN ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Mesin Jurnal Elemen Mechanical Engineering for Society and Industry Journal of Mechanical Design and Testing (JMDT) Eksergi: Jurnal Teknik Energi METAL : Jurnal Sistem Mekanik dan Termal Eduvest - Journal of Universal Studies Jurnal Profesi Insinyur Indonesia Journal of Bioresources and Environmental Sciences Advance Sustainable Science, Engineering and Technology (ASSET)
Berkah Fajar Tamtomo kiono
Jurusan Teknik Mesin Fakultas Teknik Universitas Diponegoro
Aerospace Engineering 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 Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Neuroscience Social Sciences Transportation

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Analisis Energi dan Eksergi pada Siklus Rankine Organik Terintergerasi untuk Pemulihan Panas Limbah dari Sistem AC AHLURIZA, PRADIPTA; KIONO, BERKAH FAJAR TAMTOMO; UTOMO, MOHAMAD SAID KARTONO TONY SURYO
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 11, No 3: Published July 2023
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v11i3.567

Abstract

ABSTRAKPenelitian ini bertujuan untuk menganalisa energi dan eksergi sistem gabungan AC dan ORC dengan parameter jenis refrigeran yang berbeda. Penelitian ini dilatarbelakangi oleh permasalahan dimana limbah panas dari sistem AC menjadi salah satu penyebab rusaknya lingkungan. Penelitian dilakukan dengan cara simulasi menggunakan software EES (Engineering Equation Program). Analisis data yang digunakan adalah analisis data kuantitatif dengan perbedaan nilai performa subsistem AC dan ORC terhadap jenis refrigeran yang berbeda. Berdasarkan analisis termodinamika (energi dan eksergetik), R600a-R227ea dipilih sebagai pasangan fluida untuk siklus rankine organik dan AC terintegerasi. Koefisien kinerja kombinasi (COP Kombinasi) sistem terintegerasi dapat ditingkatkan dari 3,65 hingga 5,37. Sistem siklus rankine organik dapat menghasilkan 4,14 kW energi listrik bersih dengan efisiensi termal 5,129%. Sistem siklus gabungan AC-ORC terintegerasi beroperasi dengan efisiensi exergi 25,37%.Kata kunci: EES, Energy, Exergy, AC, ORC ABSTRACTThis study aims to analyze the energy and exergy of ac and ORC combined systems with different refrigerant type parameters. This research is motivated by a problem where waste heat from the air conditioning system is one of the causes of environmental damage. The research was conducted by simulation using EES (Engineering Equation Program) software. The data analysis used is quantitative data analysis with differences in the performance values of the AC and ORC subsystems against different types of refrigerants. Based on thermodynamic analysis (energy and exergetic), R600a-R227ea was selected as the fluid pair for the organic rankine cycle and integrated AC. The combined performance coefficient (COP Combination) of integrated systems can be increased from 3.65 to 5.37. The organic rankine cycle system can produce 4.14 kW of clean electrical energy with a thermal efficiency of 5.129%. The integrated AC-ORC combined cycle system operates with an exergical efficiency of 25.37%.Keywords: EES, Energy, Exergy, AC, ORC
Condenser Replacement Life Prediction Based on Condenser Back Pressure Loss Factor Using Simple Life Cycle Cost Management Method: Economic Life Putra, Alam Eka; Tamtomo Kiono, Berkah Fajar; Christwardana, Marcelinus
Eduvest - Journal of Universal Studies Vol. 5 No. 3 (2025): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v5i3.44795

Abstract

Energy demand in Indonesia continues to increase, in line with the government's efforts to balance economic and population growth. In this context, the government-designed electricity supply policy prioritizes the use of coal as the main source of energy until 2050. Power plants face challenges in asset management, particularly in the replacement and maintenance of equipment such as condensers. This study aims to determine the economic life of condensers in Steam Power Plants (PLTU) with a capacity of 300 MW, as well as analyze the life cycle costs using the Simple Life Cycle Cost Management (LCCM) method. This method considers direct and indirect costs in decision-making related to equipment maintenance and replacement. The study also identified factors that affect the operational efficiency of the condenser, including backpressure and operational conditions. The results of the analysis show that careful monitoring and evaluation of the economic life of the condenser can optimize operating costs and improve the energy efficiency of the generation system. This study provides strategic recommendations for asset management in power generation, prioritizing a holistic approach in decision-making related to equipment maintenance and replacement. Thus, this research is expected to contribute to the development of more efficient energy policies in Indonesia.
Energy and Exergy Analysis in Combined Cycle Power Plant and Open Cycle Operating Conditions Effect on the Environment Kiono, Berkah Fajar Tamtomo; Hutapea, Tua Harolt; Sutaryo, Sutaryo
Journal of Bioresources and Environmental Sciences Vol 4, No 2 (2025): August 2025
Publisher : BIORE Scientia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/jbes.2025.19970

Abstract

Efforts are required to save energy and utilize energy efficiently because of fossil fuel depletion. The purpose of this study is to determine the performance of the Tutong CCPP through a study of energy and exergy efficiency, also exergy losses analysis by determining four scenarios. Energy and exergy analysis using the Cycle Tempo program obtained the results of energy efficiency in scenario 1, which is 49.26%, almost the same as the energy efficiency in scenario 2, which is 49.1% where the CCPP operates with the same GT and ST loads but in scenario 2 the ST ASV experiences actuator damage. Scenario 3 obtained CCPP efficiency of 47.6% and scenario 4 obtained open cycle efficiency of 28.2%. The largest exergy loss occurred in the Condenser, which was 81.9% in scenarios 1 and 2 and 83.4% in scenario 3. From these results, it shown the greatest exergy loss occurred in scenario 3 where two ACC fans were not functioning, resulting in greater losses due to suboptimal vacuum. A significant exergy loss also occurs in the combustion chamber, which are 15.1%, 15.05%, 15.6% in scenarios 1, 2, 3 and also 16.7% in scenario 4. A large exergy loss in scenario 4 also occurs in the chimney, that is 16.7%.   
Synthesis of Silica Gel From Rice Husk Ash for Sustainable Air Conditioning Requirements Syahbardia; Berkah Fajar Tamtomo Kiono; Sonny Handojo Winoto; Mohamad Said Kartono Tony Suryo; Dedi Lazuardi
Advance Sustainable Science Engineering and Technology Vol. 7 No. 4 (2025): August-October
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v7i4.1944

Abstract

An increase in air conditioning demand, driven by global warming and the need for comfort, highlights the importance of energy-efficient systems like desiccant cooling. This research explores using rice husk ash (RHA), an agricultural waste product from Indonesia, to synthesize silica gel for these systems. The study involved synthesizing silica gel from RHA through chemical processes and comparing its sorption capacity to commercial silica gel. Two synthesis methods were tested: a direct reaction of water glass with acid compounds and an impregnation process on honeycomb walls. The results indicate that the direct reaction method produces a silica gel with better pore performance. Ultimately, the study found that RHA from West Java, Indonesia, is a viable raw material for desiccant air conditioning, although its sorption capacity is slightly lower than that of commercial silica gel. This offers a valuable use for agricultural waste.
Co-Authors . Widayat Achdi, Endang Ahluriza, Pradipta Arief Marwanto Dedi Lazuardi Drajat Indah Mawarni Eka Darmana Eka Darmana, Eka Emara, Haura Facta, Mochammmad Fahmi, Heydar Nur Giarno Giarno Hatmoko, Sumantri Hutapea, Tua Harolt Ismoyo Haryanto Iwan Setiawan Khoiri Rozi Khoiri Rozi Kusnandar Kusnandar Kusuma, Mukhsinun Hadi M. Djaeni M. Rasyid M.S.K Tony Suryo Utomo Marcelinus Christwardana Mohamad Said Kartono Tony Suryo Muhammad Yunus Murni Murni Nanang Apriandi Pambudi, Yoyok Dwi Setyo Prakoso, Satrio Budi Pramesywari, Afifa Putra, Alam Eka Rahmansyah, Adam Restiawan, Muhammad Mika Ramadhani Sofia Loren Butarbutar, Sofia Loren Sonny Hady Winoto Sonny Handojo Winoto Sony, Severianus Sudargana Sudargana Sukarno Budi Utomo Sutaryo Sutaryo Syahbardia Syaiful - Syaiful - Tony Suryo Utomo Utomo, Mohamad Said Kartono Tony Suryo Winoto, Sonny Handojo Wirza, Alif Rahman Yudhy Kurniawan