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All Journal Jurnal Teknik Mesin Rekayasa Mesin Jurnal Rekayasa Material, Manufaktur & Energi Jurnal Inotera Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi International Journal of Marine Engineering Innovation and Research Jurnal Cahaya Mandalika Malikussaleh Journal of Mechanical Science Technology kawanad jes Jurnal Polimesin
Ahmad Syuhada
Dosen Teknik Mesin - Universitas Syiah Kuala
Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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A study of co-firing palm kernel shell on the Nagan Raya coal-fired power plant Ansar, Khairil; Syuhada, Ahmad; Sofyan, Sarwo Edhy
Jurnal Polimesin Vol 21, No 6 (2023): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i6.4021

Abstract

Co-firing biomass with coal in existing utility boilers is seen as one strategy for promoting renewable energy with low upfront costs and little to no impact on the boilers' high efficiency. The purpose of this research is to analyse the fuel characteristics and performance of palm kernel shell co-firing at Nagan Raya Coal-Fired Power Plant (CFPP) at various percentages of palm kernel shell combination. The analysis is conducted based on the operational data obtained from Nagan Raya Power Plant. In this study, the characteristics of fuel and the performance of a power plant are analysed based on percentages of fuel variations, namely 100% coal, 95% coal-5% palm kernel shell, and 90% coal-10% palm kernel shell. The results reveal that co-firing's biomass ratio boosted operation parameters, including main steam pressure, temperature, and flow rate. Subsequently, co-firing with 90% coal-10% palm kernel shell has enhanced the power plant output to 90,7 MW compared to those with 100% coal, 95% coal-5% palm kernel shell, namely 89,3 MW and 90,4 MW, respectively
Effect of rotation on achieving constant voltage in three-phase self-excited induction generator for small scale wind turbines application Syukri, Mahdi; Syuhada, Ahmad; Tarmizi, Tarmizi; Akhyar, Akhyar
Jurnal Polimesin Vol 22, No 3 (2024): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i3.5279

Abstract

Three-phase Self-Excited Induction Generators (SEIGs) are commonly employed for electricity generation in remote or isolated areas. SEIGs are preferred in such regions due to their ability to create a magnetic field by adding a capacitor to one of their terminals. Nevertheless, a significant challenge in utilizing SEIGs is maintaining a consistent output voltage in the presence of load fluctuations. This study aims to investigate the impact of generator rotation on the SEIG's output voltage and determine the optimal rotation speed required for achieving a stable output voltage. Ensuring stable voltage regulation is crucial to guarantee the proper functioning of all loads connected to the SEIG. Furthermore, operating the SEIG in parallel with other generators is advantageous. The methodology employed in this study involves varying the load supplied by the SEIG at different capacitor values. Unwanted voltage variations occur due to load fluctuations within a generating system or SEIG. Adjustments to the generator's rotation speed are made to uphold a uniform voltage level. The variables considered in this study include the generator's rotation speed, capacitor size, and load fluctuations. Simulation results demonstrate that the SEIG's output voltage is affected by the generator's rotation speed, and maintaining a consistent voltage necessitates appropriate adjustments to capacitor values and generator speed. This research enhances understanding of SEIG characteristics and offers guidance on effective settings for maintaining a stable output voltage at various generator rotation speeds. Future research can focus on practically implementing these findings to enhance the performance of SEIGs in real-world applications
Effect of numerous plate holes in a cooling tower on heat transfer optimization Suansyah, Heli; Syuhada, Ahmad; Sofyan, Sarwo Edhy
Jurnal Polimesin Vol 21, No 5 (2023): October
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i5.4069

Abstract

An industry requires a cooling medium to reduce heat in an industrial machine during operation. Companies generally use cooling towers for engine cooling media. The common issue is that heat reduction and heat transfer rate are not significant. Therefore, a new variation is needed to ensure that the cooling tower can effectively lower the temperature of the machinery. The problem statement aims to determine the parameters that can enhance both the heat transfer rate and the heat transfer coefficient in cooling towers. The objective is to determine the heat transfer rate and heat transfer coefficient. The method used is experimental by varying the water inlet in five variations of the cooling tower plates, they are being 48, 60, 80, 120, and 250 holes. The results showed that the highest temperature difference occurs at Tin 80oC with the variation of 250 holes, which is 9.34oC, and the highest heat transfer value reached 1833.17 watts. Meanwhile, the lowest temperature difference occurred at Tin 60oC with a variation of 48 holes, which is 3,98oC, and the lowest heat transfer value reached 787.47 watts. The highest convection coefficient occurs at Tin 70oC with the variation of 250 holes, which is 117.74 W/m²⋅K. The lowest convection coefficient occurs at Tin 80oC with a variation of 48 holes, which is 77.36 W/m²⋅K. This can be concluded that the temperature difference (⧍T), heat transfer rate, and heat transfer coefficient will increase when the number of holes in each plate variation increases.
Performance analysis of a single-blade archimedes screw turbine for low-head micro hydro applications Maulana, Muhammad Ilham; Syuhada, Ahmad; Yusmanizar, Yusmanizar; Asyqar, Muhammad Aufa
Jurnal Polimesin Vol 23, No 4 (2025): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i4.7182

Abstract

The need for efficient micro-hydro power generation systems for low head locations and the challenges of electrification in remote areas are increasing. The Archimedes Screw Turbine (AST) offers a simple and environmentally friendly technological solution; however, experimental studies on single-blade configurations with heads below 1 meter are limited. This study aims to evaluate the performance of a single-blade AST turbine through experimental testing at varying heads (0.7-1.0 meters) and flow rates (106-1035 L/min). The analyzed parameters include torque, mechanical power, and turbine efficiency, with the application of the Taguchi method for optimization of experimental design and reduction of the number of tests. Results show that flow discharge has a dominant influence on turbine performance compared to head, with the maximum power of 115.89 W and the highest efficiency reaching 68.72% under the condition of 1 meter head and 1035 L/min discharge. This study confirms that the single-blade AST turbine can function optimally at low head conditions and is worthy of further development for small-scale renewable energy systems in irrigation canals and other shallow flow sources.
Analyzing Heat Transfer Variations with Hole Quantities in Multi-Layered Flat-Plate Cooling Towers Thaib, Razali; Syuhada, Ahmad; Perangin-Angin, Alifia Kaneysha; Al Kautsar, Teuku Muhammad Aldine
Jurnal Polimesin Vol 23, No 2 (2025): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i2.6064

Abstract

Cooling towers are essential industrial heat exchangers that cool water by exposing it to air, promoting evaporation and subsequent temperature reduction. Despite extensive research on performance enhancement, the optimal design configuration remains uncertain. This study examines the impact of hole quantity and shape on the thermal performance of a multi-layered flat-plate cooling tower. Circular holes in three configurations—80, 120, and 185 holes—were tested at inlet temperatures of 65°C and 75°C. The cooling tower has a total height of 2.4 meters, with each plate measuring 0.7 × 0.5 meters and arranged at a 15° angle. Experimental results show that the highest heat transfer rate occurs at 75°C with 185 holes, while the largest heat transfer coefficient is achieved at 65°C with the same configuration. These findings emphasize the significant role of hole quantity and geometry in optimizing cooling tower performance. The results offer valuable insights for industrial applications, particularly in improving cooling efficiency in power plants and manufacturing processes.
The Influence of Forced and Natural Convection on the Sensory Characteristics of Dried Fish Rizkia; Ahmad Syuhada
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 3 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i3.4906

Abstract

Indonesia is one of the countries with the largest archipelagos in the world, boasting an abundant wealth of natural biodiversity. One of these resources is fisheries. The production of dried fish is one of the community's efforts to increase the selling price of fish. The dried fish produced by the community is usually sold in traditional markets and has few buyers due to the lack of attention to the quality of the dried fish. To increase buyers' interest in dried fish, the quality must be improved. The aim of this study is to enhance the production system and quality of dried fish through the use of drying equipment with different drying methods, namely natural convection and forced convection drying systems. In natural convection, the drying process utilizes the movement of air flows caused by density differences, while in forced convection drying, the air flow rate is controlled with the help of a fan. This study involves the use of four variations of air velocity that will be tested: 1 m/s, 2 m/s, 3 m/s, and a gradual reduction from an initial speed of 3 m/s, decreasing by 1 m/s every 3 hours of drying until reaching 1 m/s. Drying is then continued at an air flow rate of 1 m/s until the desired moisture content is achieved. The results of the study indicate that the use of natural convection and forced convection drying methods affects the drying rate and the final product quality, including color, texture, and taste. From the results obtained, the use of forced convection drying method with a gradual reduction in air velocity proved to be the best treatment, with a drying rate of 0.036 kg/h, yielding the best final quality in terms of color, texture, and taste.
Co-Authors - Alchalil - Azhari - Hamdani - Mursalin - Ramadlan - Zulkifli . Zulfan Abraar Shalahuddin Adi Saputra Ismy Akhyar Akhyar Akhyar Akhyar Al Kautsar, Teuku Muhammad Aldine Al Munawir Amrizal Amrizal Anan Niazi Usman Andi Yusra Ansar, Khairil ARHAMI ARHAMI Arie Hantama Siregar Arya Rudi Nasution Asri Asyqar, Muhammad Aufa Azwinur Azwinur Bachtiar, Dandi Bayu Alif Satari Dandi Bachtiar Darmawan Darmawan Dedi Afandi Dogar Situmeang Erliadi Erliadi Erwin Ash'ari Fadliani Fadliani Farid Isnan Fazri Amir Fikri, Thaharul Hamdani Umar Heli Suansyah Ikhwan Ikhwan Iqbal Iqbal Ira Devi Sara Irwansyah Syam Junaidi Junaidi M Iqbal A.P M. Iqbal A.P. M. Nizar Machmud Mahdi Syukri Maidi Saputra Masri Meliagrina Meliagrina Muhammad Faisal Muhammad Hatta Muhammad Ilham Maulana Muhammad Ilham Maulana Muhammad Sayuthi Muhammad Thaib Hasan Muhammad Yusuf Muhtadin Mustika, Yulanda Dwi Nasution, Muhammad Syukri Perangin-Angin, Alifia Kaneysha Putra, Mhd Irwansyah Putra, T. Edisah Ratna Sari Ratna Sari Ratna Sary Ratna Sary Razali , Razali Razali Razali Razali Thaib Razali Thaib Rizkia Rizkia, Rizkia Sadam Husin Samsul Bahri Sarwo Edhy Sofyan Sofyan, Sarwo Edhy Suansyah, Heli Suriadi T. Edisah Putra Tarmizi Tarmizi Taufiq Taufiq Teuku Juliadi Teuku Zulfadli Teuku Zulfadli Ully Muzakir Ulul Rizza Jumada Umurani, Khairul Yufandi, Asra Yusmanizar Yusmanizar Zahrul Fuadi Zahrul Fuadi Zahrul Fuadi Zahrul Fuadi Zakirullah Zakirullah Zulfadhli Zulfadhli Zulfan Zulfan Zulkifli Zulkifli