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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 Briliant: Jurnal Riset dan Konseptual 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 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 Education Electrical & Electronics Engineering Energy Engineering 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.
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.
Analisis Energi dan Eksergi Sistem Rankine Organik Dan Sistem Refrigerasi Kompresi Uap Yang Terintegrasi Ferdyson, Ferdyson; Kiono, Berkah Fajar Tamtomo; Sutaryo, Sutaryo
BRILIANT: Jurnal Riset dan Konseptual Vol 10 No 2 (2025): Volume 10 Nomor 2, Mei 2025
Publisher : Universitas Nahdlatul Ulama Blitar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28926/briliant.v10i2.2236

Abstract

The utilization of waste heat is currently a growing trend that has gained global attention due to its contribution to new and renewable energy. Low-temperature waste heat can be used in an Organic Rankine Cycle (ORC) for cooling purposes. This study aims to utilize waste heat from a ceramic cooling machine by integrating the ORC with the Vapor Compression Refrigeration (VCR) cycle to obtain the optimal refrigerant and system performance. Thermodynamic analysis methods based on energy and exergy analysis were conducted using refrigerants R1234ze(E), R152a, RC318, R236fa, RE245cb2, R600a, R236ea, and R245fa as working fluids under operational conditions, varying the evaporator, condenser, and boiler temperatures, as well as the efficiency of the compressor and turbine. Based on the thermodynamic analysis (energy and exergy), R152a was selected as the best working fluid for this application. The coefficient of performance (COP) of the integrated ORC-VCR system was 0.6122, resulting in a cooling capacity of 16.26 kW and an exergy efficiency of 0.5017.
Co-Authors . Widayat Ahluriza, Pradipta Arief Marwanto Dedi Lazuardi Drajat Indah Mawarni Eka Darmana Eka Darmana, Eka Emara, Haura Endang Achdi Facta, Mochammmad Fahmi, Heydar Nur Ferdyson, Ferdyson Giarno Giarno Hatmoko, Sumantri 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