Article Per Year (5 Year)
p-Index From 2020 - 2025
0.408
P-Index
This Author published in this journals
All Journal Logic : Jurnal Rancang Bangun Dan Teknologi International Journal of Renewable Energy Development
Saputra, I Nyoman Agus Adi
Unknown Affiliation
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Numerical simulation of co-firing oil palm fronds and lignite coal injected at different burning rates in tangential pulverized coal burner Ihsan, Sobar; Prabowo, Prabowo; Widodo, Wawan Aries; Saputra, I Nyoman Agus Adi
International Journal of Renewable Energy Development Vol 14, No 3 (2025): May 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.60982

Abstract

Reducing CO₂ emissions and utilizing biomass, particularly palm oil mill waste, is crucial for addressing climate change, enhancing air quality, and advancing environmentally sustainable clean technology innovations. Palm fronds can serve as a renewable fuel source with minimal emissions, providing a viable co-firing option for coal in coal-fired power plants (PLTU). Although previous studies have shown promising CO₂ emission reductions through co-combustion of oil palm fronds and coal, there is still no comprehensive analysis of the combustion characteristics and emission behavior when varying the burner injection zone, thus further research is required. This study performs a numerical analysis using three-dimensional computational-fluid dynamics (CFD) to examine the co-burning process of palm fronds alongside low-calorie coal (LRC) at the Pacitan PLTU, which has a capacity of 315 megawatts. The co-burning simulation, incorporating a 5% substitution of palm fronds in each burner, was conducted to differentiate between burners A and D, aiming to determine the optimum injection area. The findings of the simulation reveal inconsistencies in combustion properties, particularly regarding temperature allocation. The primary results demonstrate a temperature rise when palm fronds are used as a co-firing fuel, attributed to their greater volatility and oxygen content compared to coal. The most notable decrease in CO₂ emissions was observed with the substitution of 5% oil palm fronds in burner B; however, the reduction was not substantial, as indicated by a mass fraction value of 0.128 at the boiler discharge. An increase in NOx mass fraction was also observed due to the organic nitrogen in palm frond biomass, which decomposes rapidly during combustion at high temperatures. This co-firing technology is expected to provide a means for lowering emissions and improving the use of alternative fuels as a substitution for fossil fuels in a time to come.
Performance Analysis of Thermoelectric Cooler Box with Water Cooling Block (WCB) and Heat Sink Fan Sutina, I Wayan; Winarta, Adi; Saputra, I Nyoman Agus Adi
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 2 (2025): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i2.93-99

Abstract

Thermoelectric cooler boxes offer an environmentally friendly, energy-efficient, and portable cooling solution. However, the performance of thermoelectric cooling systems is highly dependent on the effectiveness of heat dissipation on the hot side of the Peltier module (TEC). This study aims to experimentally investigate the impact of using a Water Cooling Block (WCB) compared to a conventional heat sink fan on the cooling performance of a thermoelectric-based cooler box. The experimental setup involved two configurations for the hot side cooling system, where parameters such as hot-side temperature, cabin temperature, and Coefficient of Performance (COP) were measured and analyzed. The experimental results showed that the use of WCB was able to significantly reduce the temperature on the hot side, with a temperature reduction in the cabin reaching 20.35 °C and an average COP of 0.09687. Meanwhile, the TEC-fan temperature in the cabin cooler box was lower at 21.45 °C, with an average COP value of 0.04718. Therefore, the Water Cooling Block demonstrates superior efficiency and thermal management compared to the heat sink fan, offering enhanced performance for thermoelectric cooler box applications in various low-temperature storage needs.
Co-Authors Adi Winarta, Adi Prabowo Prabowo sobar ihsan, sobar Sutina, I Wayan Wawan Aries Widodo