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All Journal Buana Ilmu Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Jurnal Teknik Mesin Mechanical Xplore
Khoirudin
Universitas Buana Perjuangan Karawang
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering

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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
An Energy Evaluation in a Vapor Compression Refrigeration System Utilizing R32 Refrigerant Hasanudin Hasanudin; Ananda Duta Suhendar; Amri Abdulah; Renata Lintang Azizah; Khoirudin; Karyadi; Murtalim; Abduh Al Afgani
Jurnal Teknik Mesin Mechanical Xplore Vol 3 No 2 (2023): 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.v3i2.3065

Abstract

This article reports the results of a study into the efficiency of refrigeration systems. The efficiency of the refrigerant-based cooling system is a significant issue due to its connection to global warming. Vapour compression refrigeration (VCR) systems utilise the inverted Rankine cycle to provide cooling process. Existing systems are evaluated and controlled, and their efficacy is either maintained or improved. A VCR device explores evaporator load variations at five different rpm levels as test equipment for measuring the performance coefficient of R32 refrigerant. A 365-watt compressor drives the VCR system. R32 is a more eco-friendly alternative to R22 as a refrigerant. Interpolation and extrapolation were utilized and adapted to convert the system's experimental enthalpy value to total performance. Genetron was chosen to evaluate enthalpy alongside other factors, such as VCR performance. Genetron properties was used to double-check the experiment's findings. The highest CoP was found and evaluated at a speed of 400 rpm (1st level) with the result about 3.17. The lowest value for CoP was found and achieved at the maximum attainable rpm, which was 2.53. The association between CoP and fan speed is inversely proportional during evaporator loading. Genetron properties software validation results produced an average CoP value of less than 10% compared to experimental data. In addition, this work significantly contributes to the study of VCR performance through the development of test devices for the provided VCR system
Preliminary Study of the Spring-back/Spring-go Phenomenon in the V-Bending Process Using SGCC Steel Thin Material Muhammad Rian Kurniadi; Jatira Jatira; Khoirudin; Rizki Aulia Nanda; Rama Kurniawan; Otong Jaelani; Dibyo Setiawan
Jurnal Teknik Mesin Mechanical Xplore Vol 3 No 2 (2023): 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.v3i2.3370

Abstract

This research analyses v-bending results using galvanized SGCC (JIS G 3302) sheet steel. The accuracy of the angle and dimensions of the bending results are the significant elements of the bending process that must be achieved. The bending spring-back/spring-go phenomenon has an impact on bending angle accuracy. If proper parameters are chosen, the spring-tub/spring-go angle should be minimized. This study aimed to see how the proposed v-bending process affected the spring-tub/spring-go angle value. An experimental approach was selected in this study. V-die bending opening, V-die punch angle, V-die punch speed, and bending force are all input parameters for the v-bending process. Meanwhile, in this study, galvanized steel with a thickness of 1.2 mm was used. The results of the ANOVA evaluation showed that the v-die punch speed and bending force are two parameters that affect the response of the variable, with a percentage contribution of 31.0% each. The minimum spring-back angle was found in the second sample, while the minimum spring-go angle was found in the fourth sample
The Effect of V-Bending Parameters Utilizing Electrolytic Zinc-Coated Steel Sheet (SECC) Material Dodi Mulyadi; Khoirudin; Sukarman; Mohamad Rizkiyanto; Nana Rahdiana; Ade Suhara; Ahmad Fauzi; Sumanto
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa dan Inovasi Volume 5 Nomor 1 Tahun 2023
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v5i1.3937

Abstract

This study discusses the phenomenon of spring-back and spring-go in the bending kinematic forming using V-bending dies process and Electrolytic zinc-coated steel sheet (SECC/JIS G 3313) material. The zinc layer on the galvanized steel surface should not be damaged during the material forming process. The zinc layer on the galvanized steel sheet will affect the metal forming process. This study uses an experimental design with four input parameters, namely v-die opening L (mm), punch angle (degree), punch speed (mm/minutes), and bending force (kN). The smallest spring-back was obtained in the 4th test sample: the v-die opening of 35 mm, the punch angle of 40o, the punch speed of 30 mm/minute, and the bending force of 7.50 kN. The minor spring-back degree was 1.67o. Meanwhile, the smallest spring-go obtained in the second sample, namely the v-die opening of 30 mm, the punch angle of 50o, the punch speed of 40 mm/minute, and the bending force of 7.00 kN, the minor spring-go degree of 0.92o was obtained. These results show that the best spring-back degree for SECC/JIS G 3313 material is obtained when the bending process is performed with the v-die bending parameter of 30 mm, punch angle of 50o, punch speed of 40 mm/minute, and bending force of 7.00 kN.
The Qualitative Stability and Thermal Properties Investigation of TiO2-EG/W Nanofluids Through Experimental Validation Muhamad Taufik Ulhakim; Sukarman; Khoirudin; Nazar Fazrin; Tomas Irfani; Amri Abdulah
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa dan Inovasi Volume 6 Nomor 1 Tahun 2024
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v6i1.5882

Abstract

Over the past two decades, researchers have been extremely interested in developing TiO2 nanofluids for heat exchanger applications. Therefore, this study evaluates the performance of employing TiO2 nanofluids, which were prepared using ethylene glycol (EG) and distilled water as the base fluid, then called TiO2-EG/W. The qualitative stability and thermal conductivity properties were measured through the experimental investigation. XRD and SEM analyses were also carried out to investigate the structures of TiO2 nanoparticles used in terms of their crystalline and morphological structures. The results showed a positive impact of stability even for 15 days, and after that, the nanoparticles dropped to the sedimentation by about 58%. Then, the highest thermal conductivity at the temperature of 80 °C was increased by about 17.08% compared to the base fluid. Supported by the results of XRD and SEM analysis, respectively, highlight that TiO2 nanoparticles have a rutile phase with an average crystallite size of 20.23 nm and are small spherical in morphology. This paper also provided the challenge and future perspective of TiO2 nanofluid to appear as an innovation for the development of TiO2 nanofluid in the further studies of heat exchanger applications.
Co-Authors Abduh Al Afgani Ade Suhara Ahmad Fauzi Amri Abdulah Ananda Duta Suhendar Dodi Mulyadi Hasanudin Hasanudin Jatira Jatira Karyadi Mohamad Rizkiyanto Muhamad Taufik Ulhakim Muhammad Rian Kurniadi Murtalim Nana Rahdiana Nazar Fazrin Otong Jaelani Rama Kurniawan Renata Lintang Azizah Rizki Aulia Nanda setiawan, Dibyo Sukarman Sukarman Sumanto Tomas Irfani