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All Journal G-Tech : Jurnal Teknologi Terapan Automotive Experiences
Muchammad Muchammad
Universitas Diponegoro, Indonesia
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering

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Energy Audit of the Footwear Factory Administration Building Using the Energy Consumption Intensity Analysis (IKE) Method Awwalunisa Aliya Kusuma; Heri Sutanto; Muchammad Muchammad
G-Tech: Jurnal Teknologi Terapan Vol 9 No 1 (2025): G-Tech, Vol. 9 No. 1 January 2025
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/gtech.v9i1.5880

Abstract

This study aims to enhance energy efficiency in the administrative buildings of PT. XXX's footwear factory through an energy audit. Improving energy efficiency in cooling and refrigeration systems can significantly reduce energy-related emissions due to high electricity consumption. The research method involves an energy audit in accordance with ISO 50001:2018 standards, which includes collecting historical electricity consumption data, calculating and analyze of the energy consumption intensity (IKE) and analyzing energy-saving opportunities. The analysis results indicate that the Neki A Office Marketing Building and the Bottom Office Building with an average IKE value of 17.08. The criteria building is a bit wasteful.  Regarding to the analysis the significant use of electricity in every building is Air conditioning. So, the opportunity to reduce electricity and saving energy has three potentials. However, the significant impact and appropriate to implement common issue is retrofit air conditioning to inverter type. This study concludes that the implementation of energy efficiency measures can result in significant savings in electricity consumption.
Performance and Emission Characteristics of an Engine Fueled with Mangrove Bioethanol”“Gasoline Blends Syarifudin Syarifudin; Eflita Yohana; Muchammad Muchammad; Suhartana Suhartana
Automotive Experiences Vol. 8 No. 1 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.13121

Abstract

Alternative fuels are a primary solution to address fuel scarcity and the adverse effects of fossil fuels, such as air pollution. Bioethanol is notable for its simple production process and the use of flexible raw materials, although it is often derived from crops used in food production. Mangrove bioethanol, however, is produced from Rhizophora mucronata mangrove fruit, which is abundant, rich in carbohydrates, and not part of the human food chain. This study aimed to evaluate the use of mangrove bioethanol as a biofuel on engine performance and emission reduction in gasoline engines. Laboratory-based experiments were conducted using mangrove bioethanol blends at concentrations of 5% (GE5) and 10% (GE10). Pure gasoline (G100) served as the baseline for comparison. The results showed that GE10 delivered better engine performance and lower emissions than both G100 and GE5, likely due to its high octane rating and oxygen content. Performance improvements with GE10 included increases of 7.89% in brake torque (BT) and brake power (BP), 47.55% in brake thermal efficiency (BTE), and 20.33% in exhaust gas temperature (EGT), along with a 98% reduction in brake specific fuel consumption (BSFC). In terms of emissions, GE10 led to reductions in carbon monoxide (CO) and hydrocarbon (HC) emissions by 43.56% and 36.54%, respectively, while carbon dioxide (COâ‚‚) emissions increased by 59.42%.
Co-Authors Awwalunisa Aliya Kusuma Eflita Yohana Heri Sutanto Suhartana Suhartana Syarifudin Syarifudin