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All Journal Jurnal Teknologi Jurnal Optimasi Sistem Industri INDONESIAN JOURNAL OF APPLIED PHYSICS Conference on Innovation and Application of Science and Technology (CIASTECH) Buana Ilmu Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Journal of Applied Sciences and Advanced Technology Mechanical Engineering for Society and Industry Automotive Experiences Jurnal Teknik Mesin Mechanical Xplore Jurnal Akademika Kimia Borobudur Engineering Review SEMNASTERA (Seminar Nasional Teknologi dan Riset Terapan) Jurnal Polimesin Jurnal Akademika Kimia
Sukarman Sukarman
Program Studi Teknik Mesin, Fakultas Teknik Dan Ilmu Komputer, Universitas Buana Perjuangan Karawang, Karawang
Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation

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ANALISIS KINERJA EVAPORATOR PADA VAPORS COMPRESSION REFRIGERATION SYSTEM MENGGUNAKAN REFRIGERANT R410A Sukarman Sukarman; Khoirudin Khoirudin; Murtalim Murtalim; Ahmad Fauzi; Ricko Valderama; Amri Abdulah; Anwar Ilmar Ramadhan
Jurnal Teknologi Vol 14, No 1 (2022): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.14.1.127-138

Abstract

VCR system  is an energy conversion device that uses a mechanical vapour compression cycle in the process. The performance of the VCR system using environmentally friendly refrigerants is a significant issue, and much research is still underway to evaluate and improve the efficiency of the systems used. Therefore, this paper presents an experimental investigation of the performance of the refrigeration cycle. A VCR system was used as a test tool. The coefficient of performance (CoP) was studied using a VCR system  design with varying evaporator loads. Variation of an evaporator load is done by intervening fan rpm at five rpm levels. The VCR system uses a compressor with a capacity of 365 watts using R410A refrigerant. Refrigerant R410A is one of the alternative refrigerants to replace R22 which is not environmentally friendly. Experimental data was validated using Genetron Properties 1.1 software. Experimental analysis data showed that the highest CoP was obtained at the lowest rpm with a value of 3.17. Meanwhile, the lowest CoP is 3.02, obtained at the highest rpm. Loading the evaporator with fan rpm produces a CoP value indirectly proportional to the fan rpm value. Genetron 1.1 software validation results produce a higher CoP value of about 2%-3% than experimental data.
ANALISIS FENOMENA SPRING-BACK/SPRING-GO FACTOR PADA LEMBARAN BAJA KARBON RENDAH MENGGUNAKAN PENDEKATAN EKSPERIMENTAL Khoirudin Khoirudin; Sukarman Sukarman; Nana Rahdiana; Ahmad Fauzi
Jurnal Teknologi Vol 14, No 1 (2022): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.14.1.27-38

Abstract

Bending angle accuracy is the primary output variable that should achieve in the V-bending   process. The spring-back/spring-go factor is one of the essential variables that affect the accuracy of the bending angle. This study uses the Taguchi experimental method using four input parameters and multiple practical levels. The input parameters used in this research are V-die  opening, punch angle (punch angel), punch speed (punch speed) and bending force. The V-die  opening used two experimental levels at the practical level, while the other three parameters used three functional groups. This work selected SPCC-SD low carbon steel material with a material thickness of 0.8 mm in this study. The results of the ANOVA analysis showed that the punch angle is the main factor that affects the spring-back/spring-go factor, with the highest contribution of 76.15%. This condition is also following the results of the S/N ratio analysis, where the punch angle parameter has a delta of 0.125, followed by the punch speed, V-die  opening, and bending force. These parameters have a delta value of 0.026, 0.022, and 0.009, respectively.
Analysis of Pressure Vessel Design on Radiator Cooling System Using Low Carbon Steel Material Nana Rahdiana; Sukarman Sukarman; Murtalim Murtalim; Khoirudin Khoirudin; Dodi Mulyadi; Amir Amir; Tito Chaerul Pratama; Ahmad Hidayat
Journal of Applied Sciences and Advanced Technology Vol 3, No 3 (2021): Journal of Applied Sciences and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.3.3.81-90

Abstract

This study discusses the analysis of a pressure vessel's design in the Radiator Cooling 1000 (RC-1000) system, which operates at a design temperature of 100oC. A pressure vessel is a container of gaseous, solid, or liquid material subjected to internal or external pressure and can withstand various other load variations. The pressure vessel on the RC-1000 system has a diameter of 85.4 mm or 3.36 inches and will experience an internal pressure of about 143.7 kPa or 20.84 psi, so it must be designed safely. This research method uses analytical and experimental methods. The analytical method is used to calculate the thickness of the pressure vessel material, the maximum allowable working pressure, and the hydrostatic test calculation. While the experimental method was carried out on the hydrostatic test process, the evaluation was based on the prevailing regulations in the Republic of Indonesia. Using the SPCC-SD material (JIS 3141), it was found that the minimum thickness of this pressure vessel is 1.15 mm or 0.0452 inches on the shell side and 1.10 mm or 0.0434 inches on the head/dome side. The thickness of the material used on the shell side and head/dome is 1.2 mm or 0.0472 inches in practice. This pressure vessel has passed the hydrostatic test at 1600 kPa or 232.1 psi. The test pressure is given around seven psi higher because it makes it easier to read the scale on the pressure gauge.
STUDI NUMERIK PENGARUH JARAK SIRIP TERHADAP LAJU ALIRAN PADA ALAT PENUKAR KALOR PIPA GANDA Khoirudin Khoirudin; Sukarman Sukarman; Murtalim Murtalim; Muhammad Arif Rahman; Muhammad Ihsan Fadlilah
Conference on Innovation and Application of Science and Technology (CIASTECH) CIASTECH 2021 "Kesiapan Indonesia Dalam Menghadapi Krisis Energi Global"
Publisher : Universitas Widyagama Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Alat penukar panas adalah alat yang digunakan untuk memindahkan energi kalor antara dua fluida. Pada alat penukar kalor pipa ganda, laju perpindahan panas sangat dipengaruhi oleh berbagai faktor. Jenis material, luas penampang, dan laju aliran merupakan beberapa faktor yang mempengaruhi laju perpindahan. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh jarak antar sirip pada alat penukar kalor pipa ganda. Material yang digunakan adalah pipa tembaga berdiameter dalam 10,7mm dan berdiameter luar 12,7mm. Pipa tembaga sebagai pipa dalam dan dialiri fluida dengan temperature konstan sebesar 60 °C. Material pipa luar menggunakan alumunium berdiameter dalam 19,4 dan berdiameter luar 25,4 mm dan dialiri fluida dengan temperature konstan sebesar 30 °C. Sirip dengan jarak antar sirip 10 mm, 15 mm, dan 20 mm dipasang pada bagian luar pipa tembaga. Laju aliran massa diatur konstan sebesar 0,1 kg/s. Penelitian ini dilakukan menggunakan metode numerik yang disimulisasikan dengan perangkat lunak. Dari hasil penelitian terlihat ada perbedaan laju perpindahan panas dari setiap variasi jarak sirip pada pipa tembaga. Laju perpindahan panas paling kecil terjadi pada pipa polos atau tanpa sirip yaitu sebesar 647.745 watt. Laju Perpindahan panas paling besar terjadi pada pipa dengan jarak sirip 10mm yaitu sebesar 1621.452 watt.
A Report on Metal Forming Technology Transfer from Expert to Industry for Improving Production Efficiency Khoirudin Khoirudin; Sukarman Sukarman; Murtalim Murtalim; Fathan Mubina Dewadi; Nana Rahdiana; Amin Rais; Amri Abdulah; Choirul Anwar; Aries Abbas
Mechanical Engineering for Society and Industry Vol 1 No 2 (2021)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (795.464 KB) | DOI: 10.31603/mesi.5613

Abstract

This article reports on technological mastery assistance in three small metal forming industries in Indonesia. Problems in the blangking and piercing separately process caused increased production time which resulted in inefficiency cost. Therefore, the expert team aided in metal forming technology through participatory action research (PAR) methods and experimental methods through reverse engineering for several products. The PAR method involves optimal contribution and participation from the industry. Assistance in mastering technology in small metal-forming industries reduces the manufacturing process from seven to three stages, increasing efficiency. The press machine's tonnage capacity must balance with the force blanking/piercing requirement. The minimum press machine requirement is 6.7 tons, and based on the availability of existing press machines, the expert team recommends a 20-ton capacity press machine. Total efficiency can be further increased by implementing full progressive die technology by combining piercing, blanking, and bending processes.
Multi-objective Optimization of Sansevieria Trifasciata Fiber Reinforced Vinyl Ester (STF/VE) Bio-composites for the Sustainable Automotive Industry Apang Djafar Shieddieque; Mardiyati Mardiyati; Sukarman Sukarman; Bambang Widyanto; Yulfian Aminanda
Automotive Experiences Vol 5 No 3 (2022)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.7002

Abstract

Bio-composite materials have taken an extensive interest in research over the years due to their excellent properties, such as excellent mechanical and physical properties, stiffness, and low density/lightweight. The exceptional properties of bio-composite materials have had a widespread application in several industries, such as; the packaging industry, construction, automotive, and other related engineering fields. This research investigates mechanical, physical, and microstructure properties of Sansevieria Trifasciata (STE) natural fiber, -reinforced Vinyl Ester (STF/VE) bio-composite. The mechanical and physical properties of STF/VE bio-composites, including the tensile strength and density, are investigated through fibre preparation, orientation, and fibre volume fraction parameters. The STF/VE bio-composite tensile strength coupon is manufactured using the bio-composite transfer moulding (BTM) process and with pressure moulding. The Taguchi experimental design and analysis of variance (ANOVA) are selected to investigate the effect of variables on the mechanical properties model. The alkali preparation of STF, unidirectional fibre orientation, and fibre volume fraction improve tensile strength. Non-alkali treatment and random fibre orientatio, on the other hand, result in a reduction of density. The results of the ANOVA analysis show that the fibre volume fraction (wt.%) is the variable that most significantly affects the tensile strength and density responses, with contributions of 50.57% of tensile strength and 51.34% of density, respectively. Based on the optimization results, the STF/VE with alkali treatment, unidirectional, and 15 w.t.% is chosen as the best bio-composite formulation, with the best tensile strength-density balance. It indicates that the optimum parameter was successfully achieved among the samples examined in this work.
Analysis Redox Reaction on Zinc-Coating Thickness Test in Metal Processing Industry of Small and Medium Enterprises Gatot Triyanto; Ricky R. Saputro; Chepi Reynaldir; Khoirudin Khoirudin; Sukarman Sukarman
Jurnal Akademika Kimia Vol. 11 No. 1 (2022)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (259.54 KB) | DOI: 10.22487/j24775185.2022.v11.i1.pp19-25

Abstract

This study discusses the implementation of redox reactions on the thickness test of the galvanized (zinc-coated) layer using the JIS-H-0401 standard to help Small and Medium Enterprises (SMEs) industries. Some of the finished products go through the galvanizing process in the metal processing industry. Quality constraints, especially related to the thickness of the galvanic (zinc-coated) layer, have become an object that is less controlled because of the limitations of the test equipment used. This research uses an experimental method applied to one of its products: a flat washer with SPCC material and a thickness of about 2.20 mm. SPCC - SD material is classified as low carbon steel based on its carbon content. 5-unit flat washers were identified with sample codes A, B, C, D, and E. Flat washers have an internal diameter of 22.65 - 22.7 mm. In comparison, the outer diameter is between 43.75 - 43.80. The redox reaction process uses HCl (hydrochloric acid) with a concentration of 1 M, which is diluted with water (H2O). The zinc thickness test results show that the flat washer has an average thickness of 10.52 microns with a minimum and maximum thickness variation of 10.66 -10.72 microns.
Evaluasi Kekuatan Resistance Spot Welding pada Proses Tailor welded blankss Menggunakan Mill-steel Beda Ketebalan Khoirudin khoirudin; Dicky Dimyati; Apang Djafar Ashiedieque; Sukarman S; Fathan Mubina Dewadi; Nana Rahdiana; Istianto Budhi Rahardja; Anwar Ilmar Ramadhan; Heri Suripto
Borobudur Engineering Review Vol 1 No 2 (2021): Mechanical and Industrial Engineering Research
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/benr.4916

Abstract

This paper presented the test of cup drawing, and the tensile ability of tailor welded blanks (TWBs) used to join the resistance spot welding a variety of different parameters. This study used SPCC-SD (JIS 3141) material with a material thickness of 1.0 mm and 1.2 mm. This research is focused on obtaining the highest tensile-shear strength of resistance spot welding and how it affects the results of the drawing cup process. This study used an experimental research method using six samples of RSW parameters. RSW parameters used are welding current, welding time, and squeeze time. This research was achieved the highest tensile-shear strength value of 5.09 kN and the lowest 4.15 kN which was achieved in the 5th and 1st samples respectively. The results of the cup drawing test using RSW parameters in the 5th and 6th samples showed no TWB failure in the welded area. Further research will be carried out by performing Taguchi optimization using RSW and TWBs parameters in the cup drawing process.
ANALISIS POTENSI RISIKO POSTUR KERJA PADA UMKM TELUR ASIN DESA JAYAMUKTI, KARAWANG Nana Rahdiana; Ade Suhara; Sukarman; Khoirudin
BUANA ILMU Vol 7 No 1 (2022): Buana Ilmu
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, Universitas Buana Perjuangan Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36805/bi.v7i1.3014

Abstract

Postur kerja, merupakan salah satu unsur penting dari sikap kerja yang mengandung risiko tinggi jika dilakukan dengan sikap kerja yang kurang tepat. Perlu adanya antisipasi agar tidak terjadi ganguan Musculoskeletal Disorders (MSDs). Hasil penelitian pendahuluan dengan kuesioner Nordic Body Map (NBM) pada UMKM telur asin menunjukkan keluhan dengan persentase tinggi yang dialami pekerja adalah sakit pada bagian leher atas, bahu kanan, pinggang, pantat, lutut kiri, dan lutut kanan. Keluhankeluhan ini apabila dibiarkan dalam jangka Panjang dapat menyebabkan ganguan muskuloskeletal, penyakit akibat kerja, bahkan kecelakaan kerja. Sehingga perlu dilakukan analisis postur tubuh pekerja saat melakukan aktivitas. Tujuan untuk mengetahui potensi risiko ergonomi pada UMKM telur asin “Si Emak” berdasarkan analisis postur tubuh para pekerja saat melakukan aktivitas pada proses persiapan pembuatan telur asin, dengan menggunakan metode OWAS (Ovako Working Posture Analysis System). Berdasarkan analisis postur kerja dengan menggunakan metode OWAS seluruh aktivitas masuk kategori level 4 (potensi risiko sangat tinggi), sehingga diperlukan adanya perbaikan segera postur kerja dan fasilitas kerja untuk mengurangi risiko terjadinya cedera dan atau penyakit akibat kerja. Simulasi perhitungan metode OWAS, setelah usulan penggunaan meja kerja dan kursi kerja ergonomis, diperoleh skor OWAS kategori level 1 dengan potensi risiko ergonomi rendah. Kata Kunci: UMKM, Musculoskeletal Disorders (MSDs), OWAS, Risiko ErgonomiWork posture is one of the important elements of a work attitude that contains a high risk if it is done with an inappropriate work attitude. There is a need for anticipation so that Musculoskeletal Disorders (MSDs) do not occur. The results of a preliminary study using a Nordic Body Map (NBM) questionnaire on salted egg SMEs showed that a high percentage of complaints experienced by workers were pain in the upper neck, right shoulder, waist, buttocks, left knee, and right knee. These complaints if left unchecked in the long term can cause musculoskeletal disorders, occupational diseases, and even work accidents. So it is necessary to analyze the body posture of workers when doing activities. The purpose of this study was to determine the potential ergonomic risks of salted egg SMEs "Si Emak" based on an analysis of the workers' body postures when carrying out activities in the preparation process for making salted eggs, using the OWAS (Ovako Working Posture Analysis System) method. Based on the analysis of work posture using the OWAS method, all activities are categorized as level 4 (very high risk potential), so it is necessary to immediately repair work postures and work facilities to reduce the risk of injury and or work-related diseases. The OWAS calculation simulation method, after the proposed use of ergonomic work desks and chairs, obtained an OWAS score for level 1 category with low ergonomic risk potential..Keywords: MSMEs, Musculoskeletal Disorders (MSDs), OWAS, Ergonomics Risk
The Effect of Temperature on Tensile Strength of Polypropylene Plate Material Using Hot Gas Welding (HGW) Method Rohman Rohman; Anjar Prasetyo; Amri Abdulah; Karyadi Karyadi; Thiyana Thiyana; Sukarman Sukarman
Jurnal Teknik Mesin Mechanical Xplore Vol 3 No 1 (2022): Jurnal Teknik Mesin Mechanical Xplore (JTMMX)
Publisher : Mechanical Engineering Department Universitas Buana Perjuangan Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36805/jtmmx.v3i1.2453

Abstract

This study focuses on plastic welding, a technique that employs polypropylene plastic material in 3600-litre reservoir applications. The liquid pressure within it causes hydrostatic pressure in the reservoir. The pressure in the reservoir is approximately 0.01 N/mm2. This study aimed to determine how frequently polypropylene joints leak or sustain damage as a result of welding. Hot gas welding (HGW) with a v-groove connection type is employed (v-grove). Specimens of polypropylene were prepared in accordance with ASTM D638-I. In this study, the input parameters were chosen by varying the welding position and the machine's setting temperature. The results indicated that the required welding temperature for 5 mm-thick polypropylene plastic ranged between 220 and 280 degrees Celsius. In the tensile test on samples S1, S2, and S3, the average decrease in tensile strength of the three test objects was 13.84 N/mm2, 15.98 N/mm2, and 15.21 N/mm2, respectively
Co-Authors Acim Maulana Ade Suhara Afif Hakim Ahmad Fauzi Ahmad Hidayat Amar Amar Amin Rais Amir Amir Amir Amir Amri Abdulah Anjar Prasetyo Anwar Ilmar Ramadhan Aries Abbas Arul Basit Bambang Widyanto Budi Aribowo Budi Kristiawan Chepi Reynaldir Choirul Anwar Choirul Anwar Danang Supriyanto Dede Ardi Rajab Dede Ardi Rajab Dicky Dimyati Dodi Mulyadi Edi Gunawan Fajar Mucharom Fathan Mubina Dewadi Gatot Triyanto Ilmi Ramanda Sitorus Istianto Budhi Rahardja Jatira Jatira Karyadi Khoirudin Khoirudin Khoirudin Khoirudin Khoirudin Khoirudin Khoirudin Khoirudin Khoirudin Mardiyati, Mardiyati Mohamad Rizkiyanto Muhamad Taufik Ulhakim Muhammad Arif Rahman Muhammad Ihsan Fadlilah Murtalim Murtalim Murtalim Murtalim Murtalim Nana Rahdiana Nana Rahdiana Nana Rahdiana Nazar Fazrin Nazar Fazrin Renata Lintang Azizah Revi Kusnadi Ricko Valderama Ricky R. Saputro Ridhwan Shalahuddin Saputra Rohman Rohman Rohman Rohman Safril Safril setiawan, Dibyo Shieddieque, Apang Djafar Shieddique, Apang Djafar Siswanto Siswanto Siswanto Sumanto Sumanto Sumanto Suripto, Heri Syahrul Taufik Hidayat Tegar Dwi Cahyo Thiyana Thiyana Tito Chaerul Pratama Tomas Irfani Trisa Ramadan Triyono Triyono Yadi Heryadi Yulfian Aminanda