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All Journal International Journal of Advances in Applied Sciences Jurnal Teknik Mesin Jurnal Mechanical Ensiklopedia of Journal Jurnal Teknik Mesin Makara Journal of Technology Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII Jurnal Teknologi dan Vokasi
Nofriady Handra, Nofriady
Institut Teknologi Padang
Aerospace Engineering Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Transportation

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PENGARUH POSISI BAUT GALVANIS DAN STAINLESS STEEL DITINJAU DARI FRACTURE SURFACE PADA SAMBUNGAN PLAT Nofriady Handra; Brazi
Jurnal Teknik Mesin Vol 2 No 1 (2012): Jurnal Teknik Mesin Vol.2 No.1 Oktober 2012
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2012.v2.i1.26-34

Abstract

This study is an experimental study using the UTM (Universal Testing Machine) where the bolts are the main object of the test. Testing independent variables are used only in the varying positions. Testing was conducted using 3 (three) bolts located at the 5 (five) pieces in a jig (test tool of the shear bolts), with different positions for each test. Number of bolt position is that as many as 5 variations of the entire position will be obtained in the optimal position to receive style. Objectives to be achieved is to know the phenomena that occur in the process of loading on the bolts. Besides the above objectives, this study also to identify and analyze the characteristics of the material properties of the shear plate is fastened with two bolts, on a variety of positions so we get a position that would result in fracture or shear bolt receiving optimal shear forces. Optimal position to receive a shear force is position 2 and 3. The position is not optimal receive shear force is position 4.
Experimental Investigation on Performance ByPass Cycle Multi-Split Cooling System-VRF Arfidian Rachman; Nofriady Handra; Lisa Nesti
Jurnal Teknik Mesin Vol 11 No 2 (2021): Jurnal Teknik Mesin Vol.11 No.2 October 2021
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2021.v11.i2.179-183

Abstract

Variable refrigerant flow air-conditioning (VRF) systems are important and widely used building energy systems around the world. In this study, the performance of a multi-split VRF system using the bypass cycle is evaluated using the experiment as a possible sub-cooling method to prevent flash gas generation in liquid pipelines. The experimental for the multi-split VRF system is developed by considering the applications of the bypass cycle, and is validated with experimental data. The results of the tests that have been carried out are obtained in the vapor compression cycle with a bypass cycle, an increase in cooling capacity of 2.96% and an energy saving ratio (EER) of 1.72%. The input power of the bypass cycle is reduced by up to 2.45% when the performance of the multi-split VRF systems with bypass cycle cooling capacity conditions.
Briket Biomassa Berbahan Dasar Serat TKKS Dengan Penambahan Serbuk Pinus dan Kanji pada Sistem Screw Ekstruder Terhadap Kekuatan Nofriady Handra
Retii 2020: Prosiding Seminar Nasional ReTII ke-15
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Empty Fruit Bunches (EFB) are one of the solid wastes produced by the palm oil industry. One of the uses of EFB is as a raw material for making alternative briquettes to overcome dependence on fossil energy. In this research, the utilization of natural waste empty fruit bunches and pine bark which is processed into powder as an added material is an innovation to obtain the output of biomass briquettes for toughness and ignition quality. The addition of a certain amount of pine bark powder is an added function to see the quality of combustion. In the process of making bio-briquettes, the binder material is needed so that the briquettes are not easily crushed by 15% and the powder composition is 10%, 15%, and 20%. The tests carried out on the sample are drop test according to the ASTM D 440-86 R02 standard, and an ignition test to obtain the ash content produced from the combustion process. The results showed, at the composition of 20/15%, the ignition quality of the briquettes was higher in volume compared to the ignition of briquettes at the composition of 10/15% and 15/15%, and resulted in smoother and more uniform burning ash. On the other hand, in this composition too, the percentage of damaged briquette fibers during the drop test is 0.09%.
PENINGKATAN SIFAT GLASS-CERAMICS FLY ASH TERVITRIFIKASI DENGAN PENAMBAHAN 30 WT.% ALUMINIUM SILIKAT DAN PENGATURAN SUHU SINTER Nurzal, Nurzal; Pratiwi, Putri; Handra, Nofriady; Perdana, Mastariyanto; Hafni, Hafni
Jurnal Teknologi dan Vokasi Vol 3 No 1 (2025): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2025.3.1.116-121

Abstract

This study investigates the effects of adding 30 wt.% aluminum silicate and varying sintering temperatures on the density and hardness of vitrified fly ash glass ceramics. Fly ash, a waste by product from coal combustion at the Suralaya thermal power plant has long posed environmental challenges. To mitigate these impacts, this research explores its utilization in producing glass ceramics. The samples were prepared as cylindrical samples with a diameter of 15 mm and thickness of 5 mm, and were fabricated using uniaxial pressing at 120 MPa. The samples were sintered at 1050, 1100, and 1150 °C with a heating rate of 5 °C/min. Experimental results reveal that adding 30 wt.% AS significantly improves the density from 2.31 to 2.51 g/cm³ and hardness from 443 to 2418.55 MPa compared to 100 wt.% fly ash. Optimal density and hardness were achieved at a sintering temperature of 1150 °C.
Automatic Sand Sieving Machine with Three Sieves Nofriady Handra; David A.; Randa J
Jurnal Teknik Mesin Vol 6 No 1 (2016): Jurnal Teknik Mesin Vol.6 No.1 April 2016
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2016.v6.i1.19-23

Abstract

Sand is the base ingredient in the development process. In addition, the material cannot be separated sand use in the industrial world. Often in industrial buildings and workers needed sand material that has been processed. Sand material is usually still mixed with rocks or gravel. To get fine sand material, do the sifting process. The sieving process is carried out in order to get ready for the sand used in the process. The design of this sand sifter tools will provide convenience and a better process when compared with the work done traditionally. Benefits of making the application of automatic sand sieving machine can help the construction workers, especially in the process of building the sand processing to several functionality and usability. And can be used to produce maximum results in conditions that are not limited in the field. The purpose of making sand sifter tools this automated system is to ease the work in process and streamline the shifting sands of time, economic and workforce. The process of making this tool consists of four main processes, manufacture sifter, frame and hopper manufacture, manufacture of other supporting components, and assembly of all components. From the results of tests and experiments, that for 20 kg of the starting material that contains sand and stone (gravel) is processed only takes approximately 25 seconds to produce three types of the filter sand and stone as well. In general, the innovation of this tool enabled us to increase production of larger sieve in a short time, for development work on a large scale; this tool is suitable for generating a large amount of production that would be more economical in terms of time and cost.
STUDI PERFORMA BRIKET AMPAS KOPI DENGAN CAMPURAN SERAT SAWIT DENGAN PEREKAT SARI BUNGA SEPATU (Hibiscus Rosa-Sinensis) Denas, Fahrezi; Handra, Nofriady
Ensiklopedia of Journal Vol 7, No 4 (2025): Vol. 7 No. 4 Edisi 1 Juli 2025
Publisher : Lembaga Penelitian dan Penerbitan Hasil Penelitian Ensiklopedia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33559/eoj.v7i4.3244

Abstract

In the future, world energy will be threatened by the increasing difficulty of finding energy sources from fossils. Experts argue that with current consumption patterns, fossil energy is expected to run out soon. Petroleum will run out in 30 years in 2052,.This study aims to determine the performance of briquettes from coffee grounds waste mixed with EFB (Empty Fruit Bunch) fiber and glued using hibiscus rona-sinesis flower extract as a natural adhesive. Variations in the ratio of coffee husk and EFB mixture (9:1, 8:2 7:3) were used to test the physical and chemical characteristics of briquettes, including density, water content, volatile matter, fixed carbon, calorific value, and ash content, which were compared with Indonesian national standards (SNI 01-6235-2000). The results showed that increasing the proportion of coffee grounds increased the calorific value of the briquettes, but the fixed carbon and volatile matter values did not meet the established standards. Other parameters such as water and ash content had met the national standards. The average density of briquettes ranges from 0.39–0.40 g/cm³, with a mixture ratio of 9:1 producing the highest calorific value, which is 4,625 cal/gram.Keywords  : Briquettes, Biomass, Calorific value, Hibiscus extract, Coffee grounds, Empty Fruit Bunch (EFB)
Briquette of Empty Fruit Bunch Fiber as an Alternative Substitution for Binderless Fuel Methods Handra, Nofriady; Indra, Ade
Makara Journal of Technology Vol. 27, No. 3
Publisher : UI Scholars Hub

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Abstract

Biomass development has been a key issue for the past few decades and will remain attractive in the future because of its cleanliness, renewability, carbon neutrality, and other advantages. This study aims to determine the optimal holding time for heating system briquettes by testing the heating value of empty fruit bunches fibers. The process of this research involves the use of one unit of briquette molding equipment by providing a heating system to the mold cylinder. Fibers were manually finetuned until they reached a size of 20 mesh (0.84 mm). Densification temperature is an essential factor that could affect the combustion properties, especially the calorific value. The Arduino program is used for setting the heating resistance time of the mold, which is 15, 20, and 25 min at a temperature of 200 ºC, and the thermal controller is used to adjust the temperature variation. Results showed that the highest calorific value of the three varieties of holding time was at 25 min with a calorific value of 4480.2 cal/g, and the lowest cost at 15 min was 4022 cal/g. Meanwhile, a calorific value of 4432.5 cal/g was found at 20 min. This finding is due to the low moisture content and high charcoal content of the sample in the 25 min briquette mold. Therefore, briquettes at 25 min have a higher heating value compared with those at 15 and 20 min holding time.
Innovation and Utilization of FABA Bean Waste as Briquette Material: A Study on Combustion Characteristics sambo, maysharah; Handra, Nofriady
Jurnal Teknik Mesin Vol 15 No 1 (2025): Jurnal Teknik Mesin Vol.15 No.1 April 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2015.v5.i1.15-22

Abstract

This study aims to investigate the innovation and utilization of fly ash bottom ash (FABA) waste from PLTU Ombilin as a briquette material, focusing on its combustion characteristics. FABA, a by-product of coal combustion, poses environmental challenges if not properly managed. In this research, FABA was blended with pyrolyzed pecan shells and starch as a binding agent, then compacted into briquettes with varying compositions. The combustion characteristics, including ignition time, combustion temperature, and calorific value, were evaluated using standard testing methods. The results indicate that variations in raw material composition significantly influence briquette performance. Briquettes containing 70% FABA, 20% pecan shell, and 10% starch exhibited the longest ignition time of 4 minutes and 3 seconds, with an average combustion temperature of 243°C. Meanwhile, briquettes composed of 60% FABA, 30% pecan shell, and 10% starch achieved the highest average combustion temperature of 376°C, with a flame duration of 3 minutes and 34 seconds. The highest calorific value, 8,714 cal/g, was obtained from briquettes containing 40% FABA, 10% pecan shell, and 40% starch. These findings demonstrate the potential of FABA waste as an alternative fuel source and contribute to sustainable industrial waste management and the development of environmentally friendly energy materials.
Co-Authors Ade Indra Anwar Kasim Anwar Kasim Arfidian Rachman Brazi Brazi Brazi Brazi David A David A. David A. Denas, Fahrezi G Gunawarman, G Gunawarman Hafni Hafni Mastariyanto Perdana Nesti, Lisa Peri Indra Yudi Peri Indra Yudi Putri Pratiwi Randa J Randa J Rio Ansuni Rio Ansuni Rio Fernando Rio Fernando sambo, maysharah Santosa Santosa Santosa Santosa Sudarisman Sudarisman Suryadi Suryadi