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Fatigue Performance of Sugar Palm Fibre-Reinforced Thermoplastic Polyurethane Composites with Varying Fibre Content Bachtiar, Dandi; Siregar, Januar Parlaungan; Suhaeri; Masri; Zulfadhli
Journal of Engineering and Science Vol. 4 No. 1 (2025): June
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/jes.v4i1.267

Abstract

This study investigates the fatigue behavior of sugar palm fibre (SPF)-reinforced thermoplastic polyurethane (TPU) composites with varying fibre contents (10 wt%, 20 wt%, and 30 wt%). The composites were fabricated using extrusion followed by hot press moulding. Tensile tests were conducted in accordance with ASTM D638 to determine the ultimate tensile strength (UTS), and fatigue tests were performed under stress levels of 80%, 70%, 60%, and 50% of the UTS, following ASTM D7791. The results indicate that an increase in fibre content leads to a reduction in both tensile strength and fatigue life, likely due to poor interfacial bonding and fibre agglomeration. Fatigue life was found to be significantly higher at lower stress levels across all fibre contents. These findings provide valuable information about the potential and limitations of SPF/TPU composites for applications involving cyclic loading, particularly in lightweight and sustainable material applications
Analisis Beban Pendingin terhadap AC Split untuk Ruangan Area Perkantoran Taman Tekno BSD Raharjo; Sujianto; Suhaeri; Ferdian, Irvan
Jurnal Inovasi Ilmu Pengetahuan dan Teknologi (JIPTEK) Vol. 7 No. 1 (2025): Jurnal Inovasi Ilmu Pengetahuan dan Teknologi (JIPTEK)
Publisher : Universitas Pamulang

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Abstract

Indonesia has a tropical climate, which results in potentially high temperatures and humidity. This condition requires every room to have an air conditioning system to ensure comfort during activities. The air conditioning equipment used is typically an air conditioner (AC). Global warming exacerbates these conditions. On the other hand, office buildings in BSD Techno Park generally have roofs made of zinc-galvanized material coated only with aluminum foil. To maintain comfortable room temperature and humidity, heat must be removed from the room, and this heat is referred to as the cooling load. This study focuses on analyzing the cooling load of split AC units for office rooms in BSD Techno Park. The goal is to determine the total cooling load and calculate the heat removed to establish the required cooling capacity. The average office room size is approximately 80 m². Activities typically take place from 10:00 AM to 4:00 PM WIB. The calculated external cooling load is 4.042 m²/W. Thus, solar conduction through the roof (Q) is 554.04 Watts. Heat transfer through walls is 122.95 Watts, while the cooling load from glass is 118.97 Watts, from doors is 2.35 Watts, and from partition walls is 10.02 Watts. The heat generated by human activities inside the room is 2,255 Watts. Therefore, the grand total cooling load, or Effective Room Latent Heat (ERLH), is 2,558.86 Watts or 29,061.81 BTU/hr. Consequently, a split AC unit with a capacity of 2 PK and 1.5 PK, or equivalent BTU/hr, is able to meet the needs of people in a room and ensure office comfort. Abstrak: Indonesia memiliki iklim tropis sehingga berpotensi memiliki temperatur dan kelembapan udara yang sangat tinggi. Kondisi ini mengharuskan setiap ruangan memiliki sistem pendinginan udara agar nyaman digunakan untuk beraktivitas. Adapun peralatan pengkondisian udara (air conditioning) yang digunakan umumnya adalah AC. Pemanasan global membuat kondisi ini semakin parah. Di sisi lain, perkantoran yang berada di Taman Tekno BSD rata-rata memiliki atap berbahan seng galvanis yang hanya dilapisi aluminium foil. Untuk menjaga agar temperatur dan kelembapan udara ruangan berada pada kondisi nyaman, panas atau kalor harus dikeluarkan dari ruangan, dan besarnya kalor ini dapat disebut sebagai beban pendingin. Penelitian ini berfokus pada analisis beban pendingin pada AC split untuk ruangan perkantoran di Taman Tekno BSD. Tujuannya adalah untuk mengetahui total beban pendingin dan menghitung kalor yang dibuang sehingga dapat ditentukan kapasitas pendinginan udara yang diperlukan. Ukuran ruangan perkantoran rata-rata memiliki luas 80 m². Kegiatan biasanya berlangsung pada pukul 10.00–16.00 WIB. Hasil penghitungan beban pendingin luar adalah 4,042 m²℃/W. Sehingga konduksi matahari melalui atap (Q) sebesar 554,04 Watt. Perhitungan kalor melalui dinding adalah 122,95 Watt. Sementara beban dari kaca sebesar 118,97 Watt, beban dari pintu sebesar 2,35 Watt, dan dari partisi pemisah sebesar 10,02 Watt. Adapun panas akibat aktivitas orang di dalam ruangan sebesar 2.255 Watt. Dengan demikian, grand total beban pendingin atau Effective Room Latent Heat (ERLH) adalah 2.558,86 Watt atau 29.061,81 BTU/hr. Maka penggunaan AC split yang memiliki kapasitas 2 PK dan 1½ PK atau setara BTU/hr direkomendasikan karena mampu memenuhi kebutuhan dan kenyamanan manusia di dalam ruangan perkantoran tersebut.
Co-Authors Aditya, Krisna Ajinar Akhyar Akhyari Alfisyahrin Ali, Masri ALI, NURDIN ARHAMI Azhar Azhari, Hari Azmi, Saddam Bachtiar, Dandi Bakhtiar, Dandi Devi Sara, Ira Didin Sabarudin Dini Nur Fadhillah Diny Fitriawati, Diny Fadli Tri Hartono Ferdian, Irvan Gapy, Mansur Gita Eka Sila Gultom, Muhammad Husin Gunawan, Randi Harahap, Silfina Rahmi Husaini ISKANDAR Krisna Aditya Lusiawati, Ira M. Nizar Machmud Machmud, Mohd. Nizar Masri Masri Ibrahim Masri, M. Faris Aufa Nasution, Elvy Sahnur Noviana, Dwi Nuraga Budiman, Andika Nurjannah Nurul Malahayati Nurwijayanti Pradinata, Edy Putra, T. Edisah RAHARJO Rizqi Ghassani Sabri Saifuddin Saiful Sila, Gita Eka Siregar, Januar Parlaungan Sujianto Suriadi Suyana, Hilma Syahriza Syahrizal Syukri , Mahdi Syukriyadin Taufik, Cevi Mochamad Udink Aulia Zainuddin Zulfadhli