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All Journal Automotive Experiences Indonesian Community Journal
Aris Purwanto
Universitas Negeri Surabaya, Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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Pelatihan Hidroponik Sebagai Upaya Peningkatan Keterampilan dan Ketahanan Pangan Siswa di Sekolah Indonesia Davao (SID) Filipina Priyo Heru Adiwibowo; Ahmad Saepuddin; Akhmad Hafizh Ainur Rasyid; Aisyah Endah Palupi; Muhaji Muhaji; I Made Arsana; A Grummy Wailanduw; Indra Herlamba Siregar; Aris Ansori; Mochamad Arif Irfa’i; Hanna Zakiyya; Aris Purwanto
I-Com: Indonesian Community Journal Vol 5 No 1 (2025): I-Com: Indonesian Community Journal (Maret 2025)
Publisher : Fakultas Sains Dan Teknologi, Universitas Raden Rahmat Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/icom.v5i1.6680

Abstract

Hydroponics training at the Indonesian School of Davao (SID) Philippines aims to improve students' skills in growing crops using soilless methods. Hydroponics is an effective solution for sustainable agriculture in countries with limited land. This training was carried out in three stages: pre-activity, implementation, and evaluation. The pre-activity stage identifies problems in implementing modern agricultural technology in schools. During implementation, students gain theoretical and practical understanding of hydroponic systems, including planting media selection, plant care, and nutrient management. Evaluation is carried out to assess the skills students acquire after training. Participants' response to the training reached 97%, reflecting high satisfaction and interest in the material presented. These findings confirm that hydroponic training can be an effective solution in preparing students to face the challenges of sustainable agriculture in the future. The results of the training show that students are able to manage hydroponic systems independently and understand the importance of environmentally friendly agriculture, as well as the skills needed to face agricultural challenges in the future.
Numerical Study of Hydrogen Enrichment on Stoichiometric DME–Air Premixed Flames Aris Purwanto; Herman Saputro; Akhmad Faruq Alhikami; Riyadi Muslim; Eka Dwi Ariyanto; Fudhail Abdul Munir
Automotive Experiences Vol. 9 No. 1 (2026)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.15766

Abstract

Dimethyl ether (DME), an alternative fuel lacking carbon–carbon bonds, offers the potential for clean combustion with minimal soot emissions. Despite this advantage, DME exhibits relatively low initial reactivity and flame-propagation velocity under premixed conditions, which constrains its stability and operational flexibility. This study presents a numerical investigation of hydrogen enrichment effects on DME–air combustion characteristics and mechanisms, with emphasis on microkinetic behavior and flame structure. The investigation employs one-dimensional (1D) and two-dimensional (2D) simulations to assess adiabatic flame temperature, laminar flame propagation velocity, elementary reaction rates, dominant reaction pathways, and distributions of temperature and OH radicals. Results from 1D simulations indicate that introducing hydrogen at low fractions (approximately 5%) markedly increases both flame temperature and propagation velocity by enhancing the H–O–OH radical pool. When hydrogen fractions exceed 10%, further improvements in combustion performance plateau as the system nears chemical equilibrium. Kinetic analysis reveals that hydrogen acts as a key modulator, shifting DME oxidation from initiation-dominated reactions to hydrogen-abstraction and chain-branching regimes. Two-dimensional simulations corroborate that this mechanistic shift produces a more compact flame, advances heat release, and increases the concentration of OH radicals by an order of magnitude. Collectively, these results demonstrate that hydrogen functions as a microkinetic enhancer rather than merely a fuel additive and indicate that moderate enrichment (5–10%) is sufficient to optimize DME combustion.
Effect of Anti-lock Braking System Modulation Frequency on Flywheel-Based Energy Harvesting During Panic Braking Agung Prijo Budijono; I Nyoman Sutantra; Agus Sigit Pramono; Aris Purwanto; Po-Hung Lin
Automotive Experiences Vol. 9 No. 1 (2026)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.16210

Abstract

A considerable portion of braking energy in electric vehicles is dissipated as heat, especially during severe or panic braking. This study experimentally investigates the effect of anti-lock braking system (ABS) modulation frequency on flywheel-based energy harvesting during panic braking using a laboratory-scale Flywheel Regenerative Capture System (FRCS). The proposed setup integrates an ABS braking unit, a magnetic clutch, a flywheel, and an electrical generator to recover part of the braking energy while maintaining braking stability. Experiments were conducted at ABS modulation frequencies of 10, 20, 30, 40, and 50 Hz. Braking performance was evaluated using wheel-speed response, slip ratio, braking time, braking distance, flywheel rotational response, and generated electrical power. At an initial braking speed of 1000 rpm, the ABS braking process operated within a slip-ratio range of approximately 0.17–0.38, while the shortest braking distance under regenerative braking reached about 15.83 m at 40 Hz, compared with about 19.58 m at 10 Hz without regenerative braking. The 10 Hz setting produced the most stable deceleration pattern, the highest flywheel rotational response, and the highest electrical output, whereas higher frequencies increased fluctuation and reduced effective torque transfer to the generator. These findings indicate that ABS modulation frequency strongly influences both braking stability and flywheel-based energy harvesting performance. The study demonstrates the feasibility of integrating a flywheel regenerative capture system with ABS-controlled panic braking, providing a basis for further vehicle-scale development.
Enhancing Stoichiometric Methane-Air Flames: The Role of N2O Replacement Aris Purwanto; Herman Saputro; Akhmad Faruq Alhikami; Fudhail Abdul Munir
Automotive Experiences Vol. 8 No. 2 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.13422

Abstract

The oxidizer is used in aviation propellants for its relatively high impulse density and non-toxic nature. At elevated temperatures, nitrous oxide (Nâ‚‚O) decomposes into approximately 33% oxygen (Oâ‚‚) and 67% nitrogen (Nâ‚‚), providing a higher oxygen content than ambient air. This decomposition enables Nâ‚‚O to produce higher flame temperatures than air. Previous studies have shown that Nâ‚‚O addition improves flame stability in methane combustion systems. This study examined the substitution of Oâ‚‚ with Nâ‚‚O in stoichiometric methane”“air premixed flames, using both numerical and experimental methods. One-dimensional and two-dimensional simulations with CHEMKIN PRO revealed that replacing air with Nâ‚‚O increases flame temperature but reduces laminar flame speed, mainly due to lower local oxygen concentrations in the reaction zone. The simulations also showed that nitrogen oxides (NOâ‚“) emissions increase significantly in the post-reaction zone, while carbon monoxide (CO) and carbon dioxide (COâ‚‚) emissions decrease. Experimental results confirmed that controlled Nâ‚‚O addition enhances flame stability, but excessive concentrations can trigger combustion instabilities. Overall, the findings indicate that introducing up to 20% Nâ‚‚O can increase flame temperature and reduce CO emissions in methane flames.
Co-Authors A Grummy Wailanduw Agung Prijo Budijono Agus Sigit Pramono Ahmad Saepuddin Aisyah Endah Palupi Akhmad Faruq Alhikami Akhmad Hafizh Ainur Rasyid Aris Ansori Ariyanto, Eka Dwi Fudhail Abdul Munir Hanna Zakiyya Herman Saputro I Made Arsana I Nyoman Sutantra Indra Herlamba Siregar MOCHAMAD ARIF IRFAI Muhaji Muhaji Po-Hung Lin Priyo Heru Adiwibowo Riyadi Muslim