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All Journal ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Mechanical Engineering for Society and Industry
Utomo, Mohamad Said Kartono Tony Suryo
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Experimental evaluation on the power characteristic of direct-photovoltaic charging for thermal storage equipment Rahman, Reza Abdu; Sulistyo, Sulistyo; Utomo, Mohamad Said Kartono Tony Suryo; Ragil, Dimas; Suyitno, Budhi Muliawan
Mechanical Engineering for Society and Industry Vol 4 No 1 (2024)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.11493

Abstract

Thermal storage is an essential equipment for storing excessive heat, especially for water heating systems. The present work proposes a preliminary study to maximize the operation of thermal storage using photovoltaics as the primary source for charging the heat storage material. The assessment indicates the concept is feasible, where the output power from photovoltaics can be directly converted to heat using a heating element. The power ratio is considerably high (up to 38.6%), resulting in the maximum temperature of the heat absorber material (water) increasing to 43.2 °C. The final assessment using suitable phase transition material shows that steady phase behavior is essential to maximizing the temperature profile of the material. It is achieved using stabilized-hexadecanoic acid, which shows a transient phase transition at a temperature of 54.2 °C, reducing the possibility of heat loss with an average temperature rate of 0.54 °C/min in the discharge stage. This finding proves the proposed concept is applicable, while further improvement can be done to adjust the suitable power output from photovoltaic and storage tank arrangement for the actual system. Despite that, the result is expected to accelerate the utilization of photovoltaics as reliable solar renewable technology.
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
Co-Authors Ahluriza, Pradipta Berkah Fajar Tamtomo kiono Ragil, Dimas Rahman, Reza Abdu Sulistyo Sulistyo Suyitno, Budhi Muliawan