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Rahman, Haolia
Politeknik Negeri Jakarta
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Performance analysis of 3D assets in virtual reality simulations for climate change: a case study in sustainable energy systems Miranto, Cahya; Firmanda, Ardiman; Rante, Hestiasari; Sukaridhoto, Sritrusta; Agus Zainuddin, Muhammad; Rahman, Haolia
Bulletin of Electrical Engineering and Informatics Vol 14, No 5: October 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v14i5.9532

Abstract

This study investigates the performance impact of 3D assets in a virtual reality (VR) simulation designed for climate change education, aiming to balance visual fidelity and system efficiency on standalone headsets. Using a case study modeled on a sustainable energy environment, key performance metrics frames per second (FPS), triangle count, and draw calls were measured to assess the effect of object density, material transparency, and batching strategies. Experimental results show that configurations with 20 trees and 20 characters maintained 101 FPS, while denser scenes with 30 trees and 30 characters dropped to 79 FPS approaching the minimum usability threshold for VR. Transparent tree foliage with alpha-cutout materials imposed higher graphics processing unit (GPU) loads than high-triangle opaque character models, highlighting the performance cost of material complexity. These findings offer practical guidelines for optimizing asset configurations in immersive educational VR content. Future work may explore integration of artificial intelligence (AI) behavior and user interaction to assess broader system performance.
Optimalisasi Aliran Turbin Aksial yang Menghasilkan Daya dalam Sistem Siklus Rankine Organik Berdasarkan Studi Numerik Haolia Rahman; Fitri Wijayanti Wijayanti; Gun Gun Ramdlan Gunadi; Albait Malikul Izzat
Infotekmesin Vol 17 No 2 (2026): Infotekmesin: Juli 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/

Abstract

Low-capacity Organic Rankine Cycle (ORC) turbines play an important role in utilizing low- to medium-temperature heat sources. This study aims to investigate the effects of working-fluid inlet temperature and turbine rotational speed on the power output and efficiency of an axial ORC turbine, as well as to determine the operating conditions that provide optimal performance. A Computational Fluid Dynamics (CFD)-based numerical simulation was conducted using SolidWorks Flow Simulation. The turbine analyzed in this study was a single-stage axial turbine equipped with eight half-round blades and operated with R134a as the working fluid. Simulations were performed at an inlet pressure of 2 MPa with inlet temperatures of 80°C, 90°C, and 100°C, and rotational speeds of 1500 rpm and 3000 rpm. The evaluated parameters included mass flow rate, enthalpy change, torque, input power, output power, and turbine efficiency. The simulation results showed that increasing the rotational speed from 1500 rpm to 3000 rpm improved the turbine power output. The highest output power of 14,064 W was achieved at 100°C and 3000 rpm, while the highest efficiency of 10.68% was obtained at 80°C and 3000 rpm. These findings indicate that rotational speed has a significant influence on turbine performance, whereas higher inlet temperatures do not necessarily result in the highest efficiency. The results of this study provide a useful basis for optimizing the design and operating conditions of axial ORC turbines for low-temperature heat recovery applications.
Filter Cleaning System Modification to Improve Dust Colletor Haolia Rahman; Alfi Hidayat Hutasuhut; Sugeng Mulyono
Recent in Engineering Science and Technology Vol. 2 No. 1 (2024): RiESTech Vol. 2 No. 1 Years 2024
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v2i01.45

Abstract

The filter cleaning system is part of the dust collector which functions as a filter between dirty air and clean air. Blockage of the dust collector is due to a lack of maintenance to control the performance of filter cleaning components such as valves, jetspray tubes and bagcloth. Another cause is the less than optimal air pressure from the jetspray to dislodge the dust adhering to the bagcloth. So it is necessary to recondition both the layout of the filter cleaning components and the optimization of jet spray pressure. Determination of the capacity of the jetspray tube is adjusted to the specifications of the compressor and uses the ASME VIII Div I (Pressure Vessel) standard with dimensions of 1400mm x 8inch SCH20. The feasibility test of the jetspray tube is carried out by calculating the allowable thickness and the factor of safety based on the pressure operated on the jetspray tube. Determining the location of the filter cleaning components is based on aspects that make it easier for the operator to carry out the maintenance so that the performance of the filter cleaning components can be controlled properly. Based on the stress simulation using solidworks 2020 for the SCH20 pipe which has a thickness of 6.35mm operated with a pressure of 7 bar it is categorized as safe to use.
Co-Authors Adhi, Pribadi Mumpuni Agus Zainuddin, Muhammad Ainun Nidhar, Ainun Albait Malikul Izzat Alfi Hidayat Hutasuhut Ardiman Firmanda Bahar UDIN Belyamin Belyamin Cahya Miranto Candra Damis Widiawaty, Candra Damis D, Candra Devi Handaya Fitri Wijayanti Wijayanti Gunadi, Gun Gun Ramdlan Hamdi Hamdi Handaya, Devi Isnanda Nuriskasari Iwan Susanto Kamal, Dianta Mustofa M, Hasvienda Noor Hidayati Paulus Sukusno Pramono, Agus Edy R, Sidiq Ramadhan, Mochammad Tendi Noer Rante, Hestiasari Rosidi Sugeng Mulyono Tatun Hayatun Nufus teguh budianto Y, Asep