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All Journal Teknik dan Ilmu Komputer JMPM (Jurnal Material dan Proses Manufaktur) Prosiding Seminar Nasional Teknoka Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Sainteks: Jurnal Sain dan Teknik Metalik: Jurnal Manufaktur, Energi, Material Teknik
Delvis Agusman
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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PERANCANGAN PENGUKURAN KINERJA PADA PT JAYA CELCON PRIMA DENGAN METODE PERFORMANCE PRISM DAN SCORING OMAX (OBJECTIVES MATRIX) Laricha, Lithrone; Agusman, Delvis; Agrida, Sanvy
Teknik dan Ilmu Komputer vol. 1 no. 4 Oktober-Desember 2012
Publisher : Teknik dan Ilmu Komputer

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Abstract

Celcon blocks produced by PT Celcon Jaya Prima are more commonly used in multistorey buildings such as offices, hospitals, hotels, industries, rather than in residential housing. To increase the stakeholders’ satisfaction and to be more competitive, PT Celcon Jaya Prima needs to develop further its products, one of which is by measuring the company’ performance. Performance measurement is done by determining the variables of KPI (Key Performance Indicator) by using Performance Prism method including stakeholder satisfaction, strategies, processes, capabilities, and stakeholders’ contributions. KPI calculation was done by AHP method. Performance measurement was performed by OMAX scoring after the weighting process completed. The results showed that PT Celcon Jaya Prima did not meet three of the KPI’s targets. It is proposed that the company employs KPI Process 5 as a way to expand its marketing strategy.  Keywords: celcon block, performance prism, KPI, AHP, OMAX
Pengaruh Starter Ragi dalam Proses Pembentukan Biogas Limbah Buah Agusman, Delvis; Rifky, Rifky; Buono, Ario Kilat
Prosiding Seminar Nasional Teknoka Vol 2 (2017): Prosiding Seminar Nasional Teknoka ke - 2
Publisher : Fakultas Teknik, Universitas Muhammadiyah Prof. Dr. Hamka, Jakarta

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Abstract

Pemanfaatan limbah buah-buahan sebagai bahanbaku yang menggunakan ragi dan tidak menggunakan ragi dengan kapasitas 15 kg dan proses fermentasi selama 21 hari dilakukan 5 tahap pengujian dan 2 tahap pengujian menggunakan gas analyzer untuk mengetahui hasil proses fermentasi.  Selama 5 tahap pengujian hanya 2 tahap pengujian saja yang menggunakan manometer U untuk melihat tekanan dari proses fermentasi dengan melihat ketinggian air. Pengujian pertama gas analyzer yang menggunakan ragi hasil dari karbon di oksida (CO2) 65,7 % dan gas metan (CH4) 7,2 %, sedangkan pada pengujian kedua yang tidak menggunakan ragi hasil dari karbon dioksida (CO2) 76,3 % dan gas metan (CH4) 9,9 %. Kandungan karbon dioksida (CO2) yang terlalu tinggi tidak mengakibatkan gas buang yang dihasilkan dari proses fermentasi buah-buahan tidak dapat melakukan proses pembakaran.
Penyusunan SOP untuk Mengatasi Kemugkinan NOT-GO Produkdi PT. CP Agusman, Delvis; Metasilani, Metasilani
Prosiding Seminar Nasional Teknoka Vol 1 (2016): Prosiding Seminar Nasional Teknoka ke - 1
Publisher : Fakultas Teknik, Universitas Muhammadiyah Prof. Dr. Hamka, Jakarta

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Abstract

Sistem Tata Kerja atau Standard Operating Procedure (SOP), berfungsi untuk memberikan acuan bagi pekerja dalam melaksanakan proses produksi, sehingga meningkatkan produktivitas kerja yang ditandai dengan semakin rendah tingkat keluhan pelanggan terhadap produk Not-Go yang dihasilkan. SOP membuat setiap prosedur kerja memiliki acuan yang jelas, sehingga produk yang dihasilkan, tidak tergantung kepada personil dalam memenuhi standar produk, tapi sangat bergantung kepada sistem. Setiap personil yang terlbat dalam setiap lini produksi, melaksanakan aktifitasnya dengan lebih tepat sasaran sehingga target zero defect dapat dicapai. Hal ini bisa terlaksana karena, setiap lini produksi bertanggungjawab terhadap bagian kerja mereka sesuai SOP yang telah ditetapkan.
Pengaruh Temperatur dan Arus Listrik Proses Pelapisan Krom Pada Plastik ABS Dengan Metode Elektroplating Rahman, Muhammad Budi Nur; Riyanta, Bambang; Agusman, Delvis
JMPM (Jurnal Material dan Proses Manufaktur) Vol 4, No 1 (2020): JUNI 2020
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v4i1.9379

Abstract

Elektroplating pada plastik berfungsi menambah sifat konduktif dan dekoratif. Plastik ABS memiliki tingkat keberhasilan untuk dilakukan elektroplating karena dapat dietsa secara kimiawi. Tujuan penelitian ini adalah mengetahui pengaruh temperatur dan arus listrik proses elektroplating krom terhadap ketebalan lapisan dan kekasaran permukaan. Proses elektroplating pada plastik ABS diawali dengan proses etching, proses metalisasi palladium, dan electrolessplating nikel. Variasi arus proses elektroplating krom yang dilakukan adalah 11 A, 16 A, dan 22 A sedangkan variasi temperatur adalah 55oC, 65oC, dan 75oC. Pengamatan hasil pelapisan meliputi pengamatan struktur mikro menggunakan mikroskop optic dan SEM, ketebalan lapisan, kekasaran permukaan dan kekerasan permukaan. Semakin besar arus proses elektroplating dapat meningkatkan kekasaran permukaan dan ketebalan lapisan. Proses elektroplating dengan arus 22 A menghasilkan kekasaran permukaan 0,493 µm dan ketebalan lapisan sebesar 60,61 µm. Peningkatan temperatur proses elektroplating sampai temperatur 75oC akan menurunkan nilai kekasaran permukaan sebesar 0,40 μm dan ketebalan lapisan sebesar 21,53 μm. Variasi arus dan temperatur proses elektroplating tidak banyak berpengaruh terhadap nilai kekerasan yang berkisar antara 111 - 114 shore-D. Electroplating on plastic serves to add conductive and decorative properties. ABS plastic has a high degree of success for electroplating because it can be chemically etched. The purpose of this study was to determine the effect of temperature and electric current on the chrome electroplating process on the thickness of the layer and surface roughness. The electroplating process on ABS plastic begins with the etching process, the palladium metallization process, and the nickel electroless-plating. The variation of the chromium electroplating process current is 11 A, 16 A, and 22 A while the temperature variation is 55oC, 65oC, and 75oC. Observation of coating results includes observation of microstructure using optical microscopy and SEM, layer thickness, surface roughness and surface hardness. Coating research results include observations of microstructure and SEM, layer thickness, surface roughness and surface hardness. The greater the current electroplating process can increase surface roughness, thickness of the layer. Electroplating process with a current of 22 A produces a surface roughness of 0.493 µm and a layer thickness of 60.61 µm. Increasing the temperature of the electroplating process to a temperature of 75oC will reduce the surface roughness value by 0.40 μm and the thickness of the layer by 21.53 μm. The variation of current and temperature of the electroplating process does not significantly affect the hardness values ranging from 111 - 114 shore-D. 
Analysis of Frame Construction Strength in Belt Conveyor Design Using Ansys Workbench Anggi Pratama; Delvis Agusman
Sainteks: Jurnal Sain dan Teknik Vol 5 No 1 (2023): Maret
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v5i1.527

Abstract

Belt conveyor is a material transfer machine that is generally used in the industrial world to transport semi-finished production materials and products from one part to another. In making a conveyor belt, the main component is needed, namely the frame. The frame is a construction that functions as a place where the components become a unit on a machine. In this research, a simulation test will be carried out to determine the strength of the construction and the material used by the framework for component loading by providing maximum carrying capacity for variable loading. The loading given is 100kg, 200kg, 300kg, 400kg and 500kg. This test simulation uses the Ansys Workbench 2020 R2 software with the finite element analysis (FEA) method. Analysis of strength testing uses a frame model measuring 4070 mm x l500 mm x 2440 mm as the main frame which is then simulated with maximum loading variations ranging from 100 – 500kg. The analysis results from testing the strength of the construction of the conveyor belt frame against the loading variable, obtained a safety factor of 100kg = 3.70; 200kg = 3.01; 300kg = 2.67; 400kg = 2.41; 500kg = 2.16. The minimum safe limit for dynamic loads is 2 according to Dobrovolsky's "machine element" book, thus the maximum loading tolerance for the conveyor belt frame may not be more than 500 kg.
Analysis of Vibration Characteristics in 17-Inch Aluminum Alloy Wheel Rims Using Finite Element Method Wijaya, Victor Indra; Ariyansah, Riyan; Agusman, Delvis; Rifky; Heriyani, Oktarina
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa & Inovasi Volume 6 Nomor 2 Tahun 2024
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v6i2.6620

Abstract

The wheel rim serves as a component designed to provide stability and necessary support for vehicle tires. The phenomenon of resonance occurring when the external vibration frequency approaches the natural frequency of the structure has the potential to increase vibration amplitude, which can lead to wheel rim damage. This study aims to investigate the shape patterns and natural frequencies of 17-inch aluminum alloy wheel rims, as well as to analyze the maximum total deformation that occurs. The finite element method is employed to simulate the vibration characteristic of 17-inch aluminum alloy wheel rims under various natural frequencies. Modifications to the wheel rim design are made by altering the spoke angle in variations of 5°, 10°, and 15°. The vibration characteristic data of the wheel rim was obtained through simulation using ANSYS software. The research findings indicate that the natural frequencies range from approximately 364.7 Hz to 723.21 Hz. Furthermore, the maximum total deformation values range from approximately 9.7 mm to 22.5 mm.
Analisa Pengaruh Modifikasi Pemasangan Solenoid Valve Pada Mesin Chiller Di Kantor BKN Pusat Rulan Fazriawan; Delvis Agusman
Prosiding Seminar Nasional Teknoka Vol 9 (2024): Proceeding of TEKNOKA National Seminar - 9
Publisher : Fakultas Teknik, Universitas Muhammadiyah Prof. Dr. Hamka, Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/teknoka.v9i1.17517

Abstract

The air conditioning machine used at Head office BKN is air-cooled chiller machine. This chiller machine works by utilizing a vapor compression cycle. The four main components in the vapor compression cycle are: compressor, condenser, expansion valve and evaporator. The vapor compression cycle will run repeatedly as long as the chiller machine is activated. The problem with this cycle is that when the chiller machine is deactivated, the liquid refrigerant (R134A) will return to the compressor, which can cause leaks/clogging. To keep the chiller in normal condition, a solenoid valve is installed between the evaporator flow and the compressor. A solenoid valve is an electromagnetic valve that functions to control the flow of air or water. In this research, tests were carried out on chiller machines that had solenoid valves installed and those that had not been installed. The results of the research are that chiller machine compressors that have solenoid valves installed have a more stable temperature. Life time of a compressor with a stable temperature is longer
Modifikasi Sistem Pemanas Oven Dengan Sumber Panas Heater Ferdiansyah, Zulkarnain; Nofendri, Yos; Agusman, Delvis
METALIK : Jurnal Manufaktur, Energi, Material Teknik Vol. 4 No. 1 (2025): Metalik: Jurnal Manufaktur, Energi, Material Teknik
Publisher : Universitas Muhammadiyah PROF. DR. HAMKA Fakultas Teknik – Program Studi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/metalik.v4i1.20054

Abstract

Background: Penelitian ini berfokus pada perancangan dan analisis kinerja alat pengering kayu dengan tujuan meningkatkan efisiensi proses pengeringan melalui pengendalian suhu udara. Modifikasi dilakukan dengan mengganti sistem pemanas konvensional menggunakan heater dan blower sebagai sumber panas. Alat pengering ini memiliki dimensi panjang 1170 mm, lebar 740 mm, dan tinggi 650 mm. Pengujian dilakukan pada suhu 50°C, 60°C, dan 70°C untuk mengevaluasi perubahan kadar air, massa kayu, kelembaban relatif, serta durasi pengeringan. Hasil eksperimen menunjukkan bahwa peningkatan suhu pengeringan mempercepat penurunan kadar air kayu. Pada suhu 50°C, kadar air berkurang hingga 17% dalam 600 menit, sedangkan pada suhu 60°C dan 70°C, kadar air menurun masing-masing hingga 16% dalam 420 menit dan 15% dalam 300 menit. Peningkatan efisiensi pengeringan terjadi karena udara panas mempercepat pelepasan uap air dari kayu, sehingga mengurangi waktu pengeringan dan meningkatkan kualitas hasil akhir.   Abstract Background: This study focuses on the design and performance analysis of a wood drying machine aimed at improving drying process efficiency through air temperature control. The modification was carried out by replacing the conventional heating system with a heater and blower as heat sources. The drying machine has dimensions of 1170 mm in length, 740 mm in width, and 650 mm in height. Testing was conducted at temperatures of 50°C, 60°C, and 70°C to evaluate changes in moisture content, wood mass, relative humidity, and drying duration. Experimental results indicate that increasing the drying temperature accelerates the reduction of wood moisture content. At 50°C, the moisture content decreased to 17% within 600 minutes, while at 60°C and 70°C, it dropped to 16% in 420 minutes and 15% in 300 minutes, respectively. The improvement in drying efficiency occurs because hot air speeds up the release of water vapor from the wood, thereby reducing drying time and enhancing the final product quality.
Studi Eksperimentasi Posisi Pendingin Termoelektrik pada Kotak Pendingin terhadap Kinerja Sistem Pendingin bertenaga Panel Surya Rifky; Setiawan , Eki Hadi; Agusman, Delvis; Mujirudin, Mohammad; Avorizano, Arry
METALIK : Jurnal Manufaktur, Energi, Material Teknik Vol. 4 No. 2 (2025): Metalik: Jurnal Manufaktur, Energi, Material Teknik
Publisher : Universitas Muhammadiyah PROF. DR. HAMKA Fakultas Teknik – Program Studi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/metalik.v4i2.21140

Abstract

Solar cells are a powerful technology to convert solar energy into electrical energy directly, while thermoelectrics can convert electrical energy (potential difference) into heat energy (temperature difference). The combined solar cell and thermoelectric system is used as an air conditioner. The research was conducted by making a cooling system in the form of a cooling box with a cooling source on the roof side and wall side. The cooling source in this study is a thermoelectric cooling system consisting of a series of thermoelectric modules. The purpose of this study is to find that the position of the TEC affects the cooling results in the cooling box and determine the lowest temperature and performance of the cooling system in the cooling box. The method used is an experimental method with the model is a cooler box with cooler box dimensions: 520mm x 370mm x 440mm. Solar cells as electrical energy suppliers are placed in the presence of sunlight throughout the day and the output power from solar cells is distributed to the thermoelectric cooling system in series. so that thermal energy changes take place on its sides. The cold side of the thermoelectric will absorb heat from inside the cooling box, while the hot side of the thermoelectric will release heat to the environment outside the cooling box. The results showed that the positioning of the thermoelectric cooler on the roof side and the wall side of the cooler box affected the heat transfer and temperature achievement in the center of the cooler box. The average center room temperature achieved by the cooler on the roof side is 23.70 ℃ and 24.75 ℃ on the wall side. While the coefficient of performance of the cooling system in the cooler box with thermoelectric cooler on the roof side amounted to 2.17 and in the thermoelectric cooler on the wall side amounted to 1.8.
Co-Authors Anggi Pratama Avorizano, Arry Bambang Riyanta, Bambang Buono, Ario Kilat Ferdiansyah, Zulkarnain Lithrone Laricha Metasilani, Metasilani Mujirudin, Mohammad Nofendri, Yos Oktarina Heriyani Rahman, Muhammad Budi Nur Rifky, Rifky Rifky, Rifky Riyan Ariyansah Rulan Fazriawan Sanvy Agrida Setiawan , Eki Hadi Wijaya, Victor Indra