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JURUTERA (Jurnal Umum Teknik Terapan)
Published by Universitas Samudra
ISSN : 23565438     EISSN : 23565438     DOI : https://doi.org/10.55377/jurutera.v10i02.8268
Core Subject : Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Engineering Mechanical Engineering
Jurnal Ilmiah Jurutera menerbitkan dalam berbagai topik dalam bidang rekayasa dan sains yang dapat dikategorikan kedalam tema-tema berikut: - Teknik Elektro dan Informatika - Teknik Geologi dan Pertambangan - Teknik Arsitektur dan Perencanaan Wilayah dan Kota - Teknik Mesin dan Industri - Teknik Sipil dan Lingkungan - Teknik Perkapalan, Sistem Perkapalan, dan Kelautan - Multidisiplin
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 9 Documents
 1 
Search results for , issue "Vol 12 No 02 (2025)" : 9 Documents clear
Experimental Study of Heat Absorption in Concrete with Paraffin and Beeswax Encapsulated in Plastic Balls as Phase Change Materials Rejeki Josua Purba, Heri; Amin, Muhammad; Arif, Zainal
JURUTERA - Jurnal Umum Teknik Terapan Vol 12 No 02 (2025)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v12i02.12058

Abstract

Energy consumption in the building sector, particularly for air conditioning (AC), accounts for approximately 30% of global energy use and one-third of greenhouse gas emissions. In urban areas, the use of conventional materials such as red bricks and concrete blocks contributes to increased indoor temperatures, thereby raising electricity demand. One promising solution is thermal energy storage technology using Phase Change Materials (PCM). This study presents an experimental investigation of heat absorption in 30×30×15 cm concrete specimens with the addition of paraffin and beeswax PCM encapsulated in plastic balls. The PCM content was varied at 0%, 5%, 10%, and 15% of the concrete volume. Heating was applied using three 160-watt incandescent lamps. The results showed that concrete containing PCM absorbed more heat than the control specimens. Heat absorption by paraffin was 8.19%, 9.83%, and 16.39%, while beeswax achieved 4.91%, 8.19%, and 14.75%. These findings suggest that the use of PCM encapsulated in plastic balls can enhance the thermal energy efficiency of concrete and reduce electricity consumption in buildings.
Analisis Pengaruh Besar Sudut Potong & Ketebalan Mata Pisau Pada Mesin Pencacah Daun Kering Terhadap Hasil Cacahan Izhar Amri, Muhammad; Bahri Widodo, Syamsul; Arif, Zainal
JURUTERA - Jurnal Umum Teknik Terapan Vol 12 No 02 (2025)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v12i02.12077

Abstract

Technology development aims to simplify work and improve equipment efficiency, including modifying the dry leaf chopper to optimize chopping results. This modification focuses on variations in the angle and thickness of the blade to obtain finer shreds that meet the needs. This study aims to determine the most effective cutting angle and blade thickness in producing the best shreds. The research was conducted at the Mechanical Engineering Laboratory of Samudra University in August 2024. The blades used varied in cutting angles of 30°, 20°, and 10° and thicknesses of 3 mm and 5 mm. The quantitative analysis method was applied in this study using the independent sample T-test to evaluate the effectiveness of each variable. The results showed that a blade angle of 10° was the most effective angle for softening the chopped dry leaves. In addition, the most optimal blade thickness to produce fine shreds was 3 mm. This modification shows a significant improvement compared to the previous shredder, which used an angle and blade thickness with less than optimal results. With this research, it is expected that the dry leaf shredder can function more efficiently and produce shreds that meet the standards
Design and Test of Heat Absorption Using Heat Pipe Condenser for Patchouli Essential Destilazion Alfarizi, Daffa; A. Abdullah, Nasruddin; Amir, Fazri; Harmin, Amalia
JURUTERA - Jurnal Umum Teknik Terapan Vol 12 No 02 (2025)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v12i02.12082

Abstract

This study aims to design and analyze a heat pipe condenser for heat absorption in the patchouli essential oil distillation process. The condenser was equipped with 6 heat pipes to condense patchouli essential vapor into liquid. In this design, the pan used is made of stainless steel with a capacity of 5 kg. In this study, a spiral copper pipe is also equipped to support heat absorption during the patchouli essential oil distillation process. In this study, several tests were carried out. the first without using a heat pipe, then a test equipped with a heat pipe, and the last using a heat pipe but not using water in a stainless steel pan. From the results of the study after the distillation of patchouli essential oil is as follows with testing without using a heat pipe on the condenser, the results of the absorption power were 840 J, and those using heat pipes had an absorption power of 42,924 J, and those using heat pipes but not using water in the pan had an absorption power of 39,900 J. Where in this study the heat pipe successfully absorbed heat power during the distillation process of patchouli essential oil.
Tungku Pemanas Logam Inovatif Untuk Proses Perlakuan Panas Berbahan Bakar Gas LPG Andriansah, Febri; Arif, Zainal; Suheri
JURUTERA - Jurnal Umum Teknik Terapan Vol 12 No 02 (2025)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v12i02.12086

Abstract

This LPG gas-fueled metal heating furnace is designed to support heat treatment and metal smelting processes in small to medium-scale industries. With dimensions of 50 × 90 × 67 cm, this furnace is equipped with a 3600 RPM Sumura burner and blower to improve combustion efficiency and even heat distribution. The wall structure consists of SK32 firebrick, a fireproof blanket, caliboard, and an iron plate as outer protection. This layered insulation system aims to contain the heat in the combustion chamber so that it does not propagate out excessively. Tests showed that the combustion chamber temperature (T6) reached 1023°C in 60 minutes. The temperature decreases gradually from the inner to the outer layers: T5 (SK32 brick) 832°C, T4 (outer brick) 69°C, T3 (fiber blanket) 49°C, T2 (clapboard) 45°C, and T1 (iron plate) 43°C. The total heat transfer by conduction was recorded at 20.671 kW. These results show that the layered insulation design is effective in maintaining thermal efficiency and improving user safety. This furnace design has great potential to be applied in metal heat treatment activities by small industry players because it is energy efficient, easy to control, and economical. This research also opens up further development opportunities, such as the integration of an automatic control system and optimization of the shape of the combustion chamber.
Solar Distillation Experiment Parabolic Dish Integrated with Spiral Copper Tube Condenser Kurniawan, Wahyu; Amin, Muhammad; A. Abdullah, Nasruddin
JURUTERA - Jurnal Umum Teknik Terapan Vol 12 No 02 (2025)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v12i02.12060

Abstract

The availability of clean water has become a major challenge due to population growth and climate change, despite 97.5% of the Earth's surface consisting of water, only 2.5% is suitable for consumption. Desalination has become an important solution to convert seawater into fresh water. One of the technologies used is the parabolic solar concentrator, which focuses sunlight to a single point to generate steam. Research using a parabola measuring 71.98 cm × 50 cm with a focal point of 62 cm produced 0.88 liters of distilled water with a cooler and 0.23 liters without a cooler. The efficiency increased from 11% to 12.5% with the use of a cooler. Spiral tubes also help to reduce the temperature of the outgoing steam, enhancing the effectiveness of the system.
Analisa Pengaruh Parameter Line Width Terhadap Kekuatan Tarik Hasil Cetak Menggunakan 3D Printer Sabri, Faris Ahmad Mizanus; Kamil, Syahiir; Sumawijaya; Bahri Widodo, Syamsul; Arif Adlie, Taufan; Arif, Zainal
JURUTERA - Jurnal Umum Teknik Terapan Vol 12 No 02 (2025)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v12i02.12351

Abstract

3D printers of the extrusion type, also known as Fused Deposition Modelling (FDM), are widely used to create products from polymer materials in the desired shapes, such as bricks, holders, toys, and so on. The quality of the printed results is significantly influenced by the process parameters that can be adjusted. This study aims to analyze the effect of the line width parameter on the tensile strength of the prints produced using extrusion-type 3D printers. The specimen design follows the ASTM D638 type IV standard, with variations in the line-width printing parameters: 0.3 mm (P1), 0.4 mm (P2), and 0.5 mm (P3). The specimens were printed in PLA. Testing was conducted on 9 specimens, 3 for each line width parameter (P1, P2, P3), using a Universal Testing Machine. The average tensile strength values obtained were 27.97 MPa (P1), 31.61 MPa (P2), and 30.52 MPa (P3). The highest tensile strength was achieved with a line width of 0.4 mm. The results of the study indicate that the line width parameter affects the tensile strength of the printed results. Determining appropriate printing parameters can improve the quality of the printed product.
Heat Transfer Analysis of Deep Coaxial Geothermal Heat Exchangers: Insights Into Heat-Flux Distribution on Borehole Wall Ujung, Idris; A. Abdullah, Nasruddin; Suheri
JURUTERA - Jurnal Umum Teknik Terapan Vol 12 No 02 (2025)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v12i02.12095

Abstract

Briquettes are solid fuel that can be used as an alternative energy source. Making biocharcoal briquettes is one way to convert a biomass energy source into another biomass by compressing it and making it into a more regular shape. In this research, red calliandra wood was used using the pyrolysis method, temperature variations and adhesive variations. The pyrolysis temperatures used are 300°C, 400°C, and 500°C with a pyrolysis time of 60 minutes. Then the briquettes are molded with a ratio of charcoal and molasses (cane molasses) 90%:10% and 70%:30%. Briquettes are tested using the SNI 01-6235-2000 method, namely calorific value, water content, ash content and volatile matter. Of the 6 samples taken, almost all met the standards and sample A briquettes obtained the best results with a composition of 90% charcoal and 10% adhesive at a temperature of 500, producing a calorific value of 6945.67 cal/gr, water content of 6.35%, ash content of 7, 76%, volatile matter 10.81% and bound carbon 77.72%.
Experimental Investigation of Thermal Performance of Concrete Walls Incorporating Paraffin-Aluminum Phase Change Material” Idris, Muhammad; Amin, Muhammad; Arif, Zainal
JURUTERA - Jurnal Umum Teknik Terapan Vol 12 No 02 (2025)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v12i02.13324

Abstract

High ambient temperatures in tropical regions contribute to increased energy consumption for indoor cooling systems. One passive thermal control method that can be applied is the use of Phase Change Material (PCM) as a latent heat storage medium. This study aims to analyze the effect of paraffin-aluminum PCM incorporation on the thermal performance of concrete walls through experimental testing. Four concrete wall prototypes with dimensions of 30 cm × 30 cm × 15 cm were prepared, consisting of a control wall without PCM and walls containing PCM layers with thicknesses of 2 cm, 3 cm, and 5 cm. The experiment was conducted under 200-watt lamp radiation for 16 hours, with temperature measurements recorded at three observation points using K-type thermocouples connected to a data logger. The results indicate that the incorporation of PCM reduced the wall surface temperature compared to the control wall. The 2 cm PCM specimen reduced the temperature by 18–22%, while the 3 cm PCM specimen achieved a 24.6% reduction. The best thermal performance was obtained from the 5 cm PCM specimen, with temperature reductions of 26.8% at the upper point, 22.9% at the middle point, and 19.2% at the lower point. Increasing PCM thickness improved the heat storage capacity and enhanced the wall’s ability to suppress surface temperature rise. The paraffin-aluminum PCM combination demonstrates potential as a passive thermal control material for building walls in tropical climates.
Numerical Analysis of the Wake Interactions Between Two Tandem Cylinders at a Reynolds Number of 1×10^5 Tambunan, Muhammad Fadli; Cut, Banta; A.Abdullah, Nasruddin
JURUTERA - Jurnal Umum Teknik Terapan Vol 12 No 02 (2025)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v12i02.13419

Abstract

Circular cylinders are a geometric shape widely utilized in engineering applications such as electricity poles, offshore piles, subsea pipelines, and heat exchangers, where the drag force fluctuations experienced by two tandem-arranged cylinders are known to be determined by the longitudinal spacing ratio (L/D); previous studies were conducted at a Reynolds number of 6.5 x 104. This foundation led to the initiative for further numerical simulation research aimed at analyzing the effect of L/D variations (1.5, 2.0, 3.0, and 4.0) on the flow characteristics around two such cylinders at a higher Reynolds number (1X10), utilizing a cylinder diameter (d) of 25 mm within a narrow square channel (H = 300 mm and L = 1500 mm). This study was performed using 2D unsteady RANS via Ansys Fluent Student R2 2021, employing a structured mesh and the k-ω SST turbulence model. The results revealed that the L/D = 1.5 variation shows a significantly lower rear pressure compared to L/D = 2.0, 3.0, and 4.0, where the largest pressure difference between the front (high) and the rear (very low and negative) indicates the highest pressure drag, a characteristic dominated by earlier flow separation and a large wake. Conversely, the L/D = 3.0 variation demonstrated the lowest upstream cylinder CD value (0.734) among all variations, suggesting optimal reduction, while the lowest downstream cylinder CD value (0.209) was recorded at the L/D = 1.5 spacing.

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