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The Effect of Greenery Façade on Thermal Comfort in Multipurpose Building at Samudra University Harmin, Amalia; Musfirah, Rizka; Syntia, Rita
JURUTERA - Jurnal Umum Teknik Terapan Vol 11 No 02 (2024)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v11i02.9567

Global climate change causes environmental temperatures to rise resulting in thermal comfort problems in humans. Thermal comfort is needed by humans in their daily lives. If thermal comfort is not met properly, it can inhibit activity, and reduce the quality of life. Humans spend 87% of their time in the building performing various activities. To improve thermal comfort in the building, air conditioning systems such as air conditioners are needed, but increased use of air conditioners will increase electricity consumption. Samudra University's multipurpose building with a glass envelope and orientation of the building in the direction of the rising sun results in direct solar radiation entering the building. The wave nature of solar radiation when it enters the glass becomes a short wave and cannot return through the glass to get out so the temperature inside increases. To minimize radiation entering the building, it is necessary to add a green facade that can absorb solar radiation heat. However, studies on the effect of green facades on buildings with glass material envelopes are still unknown. The purpose of this research is to examine how the influence of solar radiation entering the Samudra University multipurpose building on thermal comfort with experimental study methods and MATLAB simulations to obtain a thermal comfort index. The results showed that with the green façade, the indoor temperature at 12:46 pm was 38.16 ºC in the part planted with plants, while the top of the room was the hottest part because at the top there was no obstruction from the sun on the roof of the building. Based on the simulation results show that the green façade of heat entering the building undergoes absorption first so that the temperature inside the building is lower than the environment which will improve thermal comfort.

Perkembangan dan Tantangan Transisi Energi Terbarukan dalam Bauran Energi Indonesia untuk Mencapai Nol Emisi Maliya Syabriyana
JURUTERA - Jurnal Umum Teknik Terapan Vol 11 No 02 (2024)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v11i02.10810

Indonesia's journey toward a zero-emission future is a complex and multifaceted endeavor, driven by its commitment to sustainable energy practices and reducing its carbon footprint. In 2021, the Indonesian government revised and submitted its Nationally Determined Contributions (NDC), reinforcing its commitment to the Paris Agreement's goal of achieving net zero emissions by 2060 or earlier. As part of this effort, the government has set ambitious targets for the energy mix, aiming for 23% new and renewable energy by 2025 and 31% by 2050. On the path to reaching these targets, several significant strides have been made in policy development and the establishment of energy transition facilities. This article examines the progress made in the renewable energy sector, focusing on policy initiatives, progress of integration of renewable energy into the national energy grid, and its challenge. Despite these advancements, Indonesia faces substantial challenges in achieving its zero-emission goals. In conclusion, while Indonesia has made commendable progress in its renewable energy transition, realizing a zero-emission energy mix will require sustained efforts and strategic planning.

Thermal Performance Enhancement of Solar Water Heaters Using Phase Change Materials in Flat Plate Collectors Saputra Sidabutar, Baginda; A. Abdullah, Nasruddin; Abdul Rahman, Nazaruddin; Amir, Fazri
JURUTERA - Jurnal Umum Teknik Terapan Vol 11 No 02 (2024)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v11i02.10363

Solar water heaters are widely utilized for domestic hot water production, leveraging solar energy as a renewable and sustainable resource. However, the intermittent nature of solar radiation limits their efficiency, particularly during periods of low solar intensity or at night. This study investigates the thermal performance enhancement of solar water heaters through the integration of phase change materials (PCMs), specifically paraffin, within flat plate collectors. The paraffin PCM is placed within an additional pipe in the collector to store excess thermal energy during peak sunlight hours and release it when solar radiation is insufficient. Experimental tests were conducted to measure temperature fluctuations, heat storage capacity, and overall system efficiency with and without PCM integration. The results indicate that the addition of paraffin PCM significantly improves the system’s ability to retain heat, maintaining water temperatures above 50 °C for extended periods and increasing the overall efficiency of the solar water heater by 17.10%. This study demonstrates the potential of PCM-enhanced solar water heaters in optimizing energy use and improving thermal efficiency, making them more effective in regions with variable solar exposure.

Effect of Carbonization Temperature of Charcoal Briquettes from Corn Cob with Gondorukem (Resina Colophonium) Adhesive on Briquette Quality Standards Johanes Saragih, Kevin; A. Abdullah, Nasruddin; Bahri Widodo, Syamsul
JURUTERA - Jurnal Umum Teknik Terapan Vol 11 No 02 (2024)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v11i02.10364

Briquettes are an alternative energy source made from agricultural waste. Apart from producing an alternative energy source, briquettes are a more efficient and income-generating solution for processing agricultural waste in Indonesia. This research obtains quality standard of briquettes due to carbonization temperature, time and variations in the ratio of adhesive. Carbonization temperature is 300-350°C, and 350-400°C with a temperature increase rate of 10 °C/minute for 15 and 30 minutes. Then the briquettes are molded with a charcoal mass ratio of 90:10 and 80:20 with adhesive. The briquettes are then tested using the SNI 1683-2021 method including calorific value, water content, ash content, volatile matter and fixed carbon. The best method for this research is Carbonization temperature on 350-400 ℃, time of carbonization and a ratio of 90% raw material and 10% adhesive (90:10) with test results of a heating value of 5,605.75 Cal/g, water content 6.29%, ash content 6.12 %, volatile matter 11.96 % and bound carbon 81.92 %.

Progress and Challenges of Renewable Energy Transition in Indonesia’s Energy Mix Towards Net Zero Emissions Syabriyana, Maliya
JURUTERA - Jurnal Umum Teknik Terapan Vol 11 No 02 (2024)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v11i02.11141

Indonesia's journey toward a zero-emission future is a complex and multifaceted endeavor, driven by its commitment to sustainable energy practices and reducing its carbon footprint. In 2021, the Indonesian government revised and submitted its Nationally Determined Contributions (NDC), reinforcing its commitment to the Paris Agreement's goal of achieving net zero emissions by 2060 or earlier. As part of this effort, the government has set ambitious targets for the energy mix, aiming for 23% new and renewable energy by 2025 and 31% by 2050. On the path to reaching these targets, several significant strides have been made in policy development and the establishment of energy transition facilities. This article examines the progress made in the renewable energy sector, focusing on policy initiatives, progress of integration of renewable energy into the national energy grid, and its challenge. Despite these advancements, Indonesia faces substantial challenges in achieving its zero-emission goals. In conclusion, while Indonesia has made commendable progress in its renewable energy transition, realizing a zero-emission energy mix will require sustained efforts and strategic planning.

Impact Characterization of Safety Helmets Made From Areca Fiber-Reinforced Polyester Composites Ahmad, Nazli; Arif, Zainal; Arif Adlie, Taufan; Iskandar
JURUTERA - Jurnal Umum Teknik Terapan Vol 11 No 02 (2024)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v11i02.10819

Composite materials are a combination of two or more materials with different properties. Areca fiber, a natural fiber abundant in Indonesia, has the potential to be used as reinforcement in composites with Polyester BTQN 157 resin as the matrix. This study aims to analyze the effect of varying fiber-resin weight fractions (10%, 15%, 20%, 25%, and 30%) on impact strength. Specimens were fabricated using the hand lay-up method and tested using the Charpy impact method according to ASTM standards. The results show that the composite with 20% fiber content achieved the highest impact strength, at 3.193 kJ/m². However, this value remains below the Indonesian National Standard (SNI) requirement for safety helmets, which is 0.00972 J/mm². The produced helmet weighs 470 grams, exceeding the SNI standard (337 ± 5 grams). Although the helmet demonstrated resistance to impact, further research is required to optimize the material composition to fully meet SNI standards.

Innovative Jominy Test Equipment for Evaluating The Hardening Of AISI 1045 Steel Rahman; Arif, Zainal; Suheri; Bahri Widodo, Syamsul
JURUTERA - Jurnal Umum Teknik Terapan Vol 11 No 02 (2024)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v11i02.10937

The development of heat treatment testing equipment is essential in metallurgical applications, especially for determining the hardenability of steel. This study focuses on designing a portable Jominy test apparatus to evaluate the hardenability of AISI 1045 medium carbon steel, offering a more practical and cost-effective solution. The apparatus was built with an angle iron frame (64 x 82 x 64 cm) and equipped with a 200-liter water drum and a Shimizu water pump (18 L/min flow rate). Hardness testing was performed using the Rockwell B method (150 kgf load, 15-second dwell) on specimens subjected to three conditions: raw, water-quenched, and oil-quenched, after heating at 900 °C for 30 minutes. The results showed hardness increases from 91.00 HRB (raw) to 101.33 HRB (water-quenched) and 100.33 HRB (oil-quenched), with water quenching producing slightly higher values due to its faster cooling rate. The study demonstrates the effectiveness of the portable apparatus for evaluating AISI 1045 steel hardenability with advantages in portability, cost, and reliability.

Enhancing Thermal Efficiency of a Solar Water Heating System with a Parabolic Trough Collector Sukuria Mungkur, Rahmat; Umar, Hamdani; Abdullah, Nazaruddin; Amir, Fazri
JURUTERA - Jurnal Umum Teknik Terapan Vol 11 No 02 (2024)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v11i02.11033

The growing population drives the construction of high-rise buildings as residential areas, leading to an increased demand for hot water for bathing, consumption, and other purposes. Conventional water heating using fossil energy negatively impacts the environment, making solar water heater (SWH) technology an eco-friendly alternative. However, the efficiency of conventional SWHs with evacuated tube collectors remains limited due to suboptimal solar energy capture. This study aims to enhance water heater efficiency by utilizing concentrated solar power (CSP) technology with a parabolic trough collector (PTC). The PTC focuses solar energy on a square-shaped receiver containing a sensible heat storage medium and a main pipe for heating water. The research was conducted experimentally by measuring water temperature with thermocouples and solar radiation using a pyranometer. The results show that the maximum water temperature achieved was 84°C at a solar radiation intensity of 1.112 W/m², with a maximum system efficiency of 35%. This technology demonstrates potential for improving the efficiency of renewable energy-based water heating systems.

Studi Numerik Aliran Melintasi Empat Buah Silinder Sirkular Yang Tersusun In- Line Square Dengan Bodi Pengganggu Yusup, Intan; Cut, Banta; Bahri Widodo, Syamsul
JURUTERA - Jurnal Umum Teknik Terapan Vol 11 No 02 (2024)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v11i02.11144

The development of circular cylinders in engineering has been widely utilized, including in pipeline construction, underwater networks, and tube heat exchangers. Previous studies have indicated the presence of drag forces, lift forces, vortex shedding, and vortex-induced vibrations (VIV) that occur when fluid flows past these cylindrical arrangements. Consequently, further research was conducted using numerical simulations aimed at reducing drag forces, lift forces, vortex shedding, and VIV in these circular cylinder configurations. In this study, four in-line square circular cylinders were arranged with a main cylinder diameter (D = 25 mm) and a disturbance body diameter (d = 4 mm), yielding a diameter ratio (d/D) of 0.16. The cylinder arrangement was placed in a narrow channel with a square cross-section measuring (H = 300 mm and L = 1500 mm), resulting in a blockage ratio of 25%, tested at a Reynolds number (Re) of 5.0 × 104 based on the cylinder diameter. Three disturbance bodies (DB) were positioned at angles θ = 0°, 120°, and 240° in front of two upstream cylinders with a gap distance (G/D) of 0.16 relative to the circular cylinder. This numerical simulation research was conducted using 2D UnsteadyRANS with Ansys Fluent 19.1 software, employing structured mesh and turbulence models k-ω-SST and K-Epsilon Standard. The results indicated that the distance between cylinders and the use of disturbance bodies significantly affect the drag coefficient experienced by the four in-line square circular cylinders. The addition of disturbance bodies surrounding the two upstream cylinders at angles of 0º, 120º, and 240º was highly effective in reducing the drag coefficient (CD) on the third cylinder (upper downstream) and the fourth cylinder (lower downstream).

A Study on the Design and Construction of a Stove Utilizing Waste Oil as Fuel Urhamdi, Nila; Bahri Widodo, Syamsul; Cut, Banta
JURUTERA - Jurnal Umum Teknik Terapan Vol 11 No 02 (2024)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v11i02.11145

The history of stoves reflects significant development, starting from the use of simple hearths to the emergence of kerosene stoves, electric stoves, and gas stoves. In Indonesia, the use of gas stoves continues to rise, especially with the ongoing energy conversion initiatives by the government. However, limited access to gas fuel in remote areas remains a challenge, necessitating efforts to explore alternative fuels. Used cooking oil is a waste product that has the potential to pollute the environment and adversely affect human health; however, it can be utilized as a stove fuel. This study aims to design and test a burner stove that utilizes used cooking oil as fuel. The research method involves quantitative data obtained from burner stove testing. The results indicate that the efficiency of the stove achieved is between 10,03% - 10,41%.

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Fazri

Contact Email
jurutera@unsam.ac.id

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+6285261571533

Journal Mail Official
fazri@unsam.ac.id

Editorial Address
Jln. Prof. Dr. Syarif Thayeb, Meurandeh, Kota Langsa, Aceh, 24416

Location
Kota langsa,

Aceh

INDONESIA

Abstract

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Fazri

Contact Email jurutera@unsam.ac.id

Phone +6285261571533

Journal Mail Official fazri@unsam.ac.id

Editorial Address Jln. Prof. Dr. Syarif Thayeb, Meurandeh, Kota Langsa, Aceh, 24416

Location Kota langsa, Aceh INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Fazri

Contact Email
jurutera@unsam.ac.id

Phone
+6285261571533

Journal Mail Official
fazri@unsam.ac.id

Editorial Address
Jln. Prof. Dr. Syarif Thayeb, Meurandeh, Kota Langsa, Aceh, 24416

Location
Kota langsa,

Aceh

INDONESIA