cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
REM
Contact Email
rieza@eng.uir.ac.id
Phone
+6281378508244
Journal Mail Official
rem@journal.uir.ac.id
Editorial Address
Jl. Kaharuddin Nasution No 113 Perhentian Marpoyan, Pekanbaru, Riau 28284
Location
Kota pekanbaru,
Riau
INDONESIA
Journal of Renewable Energy and Mechanics
Published by Universitas Islam Riau
ISSN : 27146219     EISSN : 26148315     DOI : 10.25299
Core Subject : Social, Engineering,
Automotive Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences
REM is a peer-reviewed and open access journal that publishes significant and important research from area of Mechanical and Material Science and Development of Technology related with Mechanical Engineering. We accept submission from all over the world on English language. Our Editorial Board members are prominent and active researchers in renewable energy and mechanical engineering fields who ensure efficient, fair, and constructive peer-review process. All accepted articles will be published freely and available to all readers with worldwide visibility and coverage. REM (Journal of Renewable Energy and Mechanics) published periodically two times annually by Department of Mechanical Engineering, Faculty of Engineering, Universitas Islam Riau.
Arjuna Subject : -
Articles 104 Documents
 7   8   9   10   11 
Manual Hydraulic Briquetting Machine for Sustainable Fuel Production from Biomass and Charcoal Dust Umar, Saminu; Hauwa’u Umar
Journal of Renewable Energy and Mechanics Vol. 9 No. 01 (2026): REM VOL 9 No 01 2026
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Access to reliable and affordable energy remains a significant challenge in rural communities, where reliance on firewood, charcoal and kerosene contributes to environmental degradation and health risks. This study reports the design, fabrication and testing of a manual hydraulic briquetting machine capable of converting locally available biomass and charcoal dust into dense, uniform briquettes. The machine was constructed from mild steel and a hydraulic bottle jack, allowing operation without electricity and simple maintenance using local tools. Briquette production involved mixing biomass with cassava starch as a binder, then manually compressing and air-drying. Compressive strength tests showed that charcoal dust produced the strongest briquettes (1.30 KNm-²), followed by rice husk (1.10 KNm-²) and sawdust (1.03 KNm-²), indicating that feedstock properties influence briquette performance. The results indicate that the machine provides a low-cost, sustainable fuel option while promoting effective utilisation of biomass and charcoal by-products.    
Effect of Differences in Fluid Pressure Passing Through Venturi on Dissolved Oxygen Level in Medical Waste Water: Effect of Differences in Fluid Pressure Passing Through Venturi on Dissolved Oxygen Level in Medical Waste Water Anwar, Zainuri; Irfan Dzaky, Muhammad; Reco Putra, Aldony; Bayu Saputra, Fajri; Roihan, Mohammad; Audhi Natanegara, Muhammad Audhi Natanegara
Journal of Renewable Energy and Mechanics Vol. 9 No. 01 (2026): REM VOL 9 No 01 2026
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Medical wastewater is characterized by a high organic load, which has the potential to deplete Dissolved Oxygen (DO) levels in receiving waters. One effective method to mechanically increase DO levels is through the aeration process using a venturi injector-based microbubble generator (MBG). This study aims to analyze the effect of fluid pressure variations passing through the venturi on the increase of DO levels in medical wastewater. The research was conducted experimentally by varying the fluid input pressures at 1 bar, 2 bar, 3 bar, and 4 bar to observe the effectiveness of ambient air suction through the venturi injection. DO level measurements were carried out over a time range of 15–60 minutes using a DO meter. The results indicated an increase in DO levels at an inlet pressure of 3 bar, reaching approximately 9 mg/L. However, a decrease in DO levels occurred at 4 bar, dropping to 6.1 mg/L. This was due to excessive velocity causing turbulence in the divergent zone, so the bubbles to collide and coalesce
An Experimental Study on the Effect of a Water Injection System on Performance, Specific Fuel Consumption, and Exhaust Gas Emissions in a 110 cc Gasoline Engine MARBUN, JALYIAMSEP; Mujahidin, Didin Mujahidin; Nashrul Chanief Hidayat
Journal of Renewable Energy and Mechanics Vol. 9 No. 01 (2026): REM VOL 9 No 01 2026
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

ABSTRACT The increase in motor vehicle numbers in developing countries has led to higher fuel demand and increased exhaust emissions, requiring technologies to optimise combustion and reduce environmental impact. This study aims to evaluate the effects of injection systems on engine performance, fuel consumption, and exhaust emissions in 110 cc gasoline engines. The experiment compared two configurations: standard operation (STD) and water injection (H₂O), in which distilled water was sprayed at 15% of the fuel volume at 400 kPa, controlled by an Arduino-based PWM system. Exhaust emissions were measured using an HG-520 gas analyser; performance was tested on a dynamometer; and fuel consumption was evaluated through a 15 km road test. The results showed that water injection significantly reduced HC and CO emissions by 49.4% and 90%, respectively, while CO₂ remained stable and O₂ decreased by 74.60%, indicating more effective combustion. Engine performance improved, with power increasing by 6.26% and torque increasing by 6.26%. However, fuel consumption increased by 18.75%. Overall, water injection can improve combustion quality and engine output, but further optimisation is needed to improve fuel efficiency.  
Performance and Thermal Efficiency Analysis of A Household-Scale Waste Incinerator without External Fuel Nurjaya, Nurjaya; Reson Wibowo,; Nur Rohmat; Muhamad Cahyadi
Journal of Renewable Energy and Mechanics Vol. 9 No. 01 (2026): REM VOL 9 No 01 2026
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Household waste accumulation has become a significant environmental issue in urban areas. This study evaluates the thermal performance and mass-reduction efficiency of a household-scale waste incinerator prototype operating without external fossil fuel under natural-draft airflow. The combustion chamber was fabricated from a cylindrical steel drum equipped with primary air inlets. Mixed household waste (initial mass 5 kg; moisture content 28%) was tested. Temperature was measured using a K-type thermocouple positioned at the chamber centre. The maximum recorded temperature reached 100°C within 40 minutes. Mass reduction reached 25%, calculated based on initial and final mass measurements. The estimated thermal efficiency was 7.1%, determined using a simplified energy balance approach. The results indicate that the prototype operates under low-temperature thermal degradation conditions rather than complete incineration. Design improvements are required to achieve standard incineration temperatures.

Page 11 of 11 | Total Record : 104

 7   8   9   10   11 

Filter by Year

2018 2026


Reset
Filter By Issues
All Issue Vol. 9 No. 01 (2026): REM VOL 9 No 01 2026 Vol. 8 No. 02 (2025): REM VOL 8 No 02 2025 Vol. 8 No. 01 (2025): REM VOL 8 NO 01 2025 Vol. 7 No. 02 (2024): REM VOL 7 NO 02 2024 Vol. 7 No. 01 (2024): REM VOL 7 NO 01 2024 Vol. 6 No. 02 (2023): REM VOL 6 NO 02 2023 Vol. 6 No. 01 (2023): REM VOL 6 NO 01 2023 Vol. 5 No. 02 (2022): REM VOL 5 NO 02 2022 Vol. 5 No. 01 (2022): REM VOL 5 NO 01 2022 Vol. 4 No. 02 (2021): Journal of Renewable Energy and Mechanics (REM) Vol. 4 No. 01 (2021): REM Vol. 3 No. 02 (2020): REM Vol. 3 No. 01 (2020): REM Vol. 2 No. 02 (2019): REM Vol. 2 No. 01 (2019): REM Vol 2 No 01 (2019): REM Vol 1 No 02 (2018): REM Vol. 1 No. 02 (2018): REM More Issue