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All Journal G-Tech : Jurnal Teknologi Terapan
Riswan Sepriyatno
Universitas Islam Malang, Indonesia
Computer Science & IT Decision Sciences, Operations Research & Management Energy Engineering

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Cold Thermal Energy Storage (CTES) Study In A Hospital Building Akhmad Faruq Alhikami; Egi Dwi Gusuma; Moh. Fiqi Firmansah; Rusdan Aditya Aji Nugroho; Riswan Sepriyatno
G-Tech: Jurnal Teknologi Terapan Vol 8 No 1 (2024): G-Tech, Vol. 8 No. 1 Januari 2024
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33379/gtech.v8i1.3559

Abstract

This paper studies cold thermal energy storage in a hospital building. There are six CTES strategies to implement in the building includes full storage, levelling storage, partial storage 30%, partial storage 50%, partial storage 70%, and partial storage 90%. The energy consumption, electricity cost and chiller performances are evaluated to find the optimum mode.The results showed that levelling storage found the best mode for new cooling system investment with annual savings up to 10.5%. In addition the energy consumption is considered lower than normal cooling system. The chiller capacity of partial storage 30% is closed to normal cooling, thus this strategy is the best for replacement system with the annual savings up to 13%.
Investigation of Carburetor Venturi Bore Size in Internal Combustion Engines Using Ron 95 Fuel Mixed With Bioethanol Riswan Sepriyatno; Tri Sandi Arif Hamzah; Nur Rahmadani Jatu Matimbang; Akhmad Faruq Alhikami; Mochammad Khoirul Rosidin
G-Tech: Jurnal Teknologi Terapan Vol 8 No 2 (2024): G-Tech, Vol. 8 No. 2 April 2024
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33379/gtech.v8i2.4082

Abstract

This study presents the results of an investigation into the performance and exhaust emissions of a four-stroke, 1-cylinder internal combustion engine. In order for the engine to produce optimal energy, the right fuel is needed so as to reduce exhaust emissions, which are considered very dangerous for the survival of living things. Bioethanol is considered to optimize combustion reactions in the form of CO dan HC produced, but bioethanol contains less energy compared to gasoline. The purpose of this study is to analyze the fuel v-power shell of RON 95mixed with 15% bioethanol fuel with a comparison of carburetor venturi hole sizes 26 and 28. From the results obtained, fuels with bioethanol mixtures have lower levels of waste emissions while, performance is improved compared to non-mixed petrol fuels.
Co-Authors Akhmad Faruq Alhikami Egi Dwi Gusuma Mochammad Khoirul Rosidin Moh. Fiqi Firmansah Nur Rahmadani Jatu Matimbang Rusdan Aditya Aji Nugroho Tri Sandi Arif Hamzah