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All Journal POSITRON SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Jurnal Ilmiah Teknik Mesin Jurnal Rekayasa Mesin AKSIOLOGIYA : Jurnal Pengabdian Kepada Masyarakat Patria Artha Technological Journal Gorontalo Journal of Infrastructure and Science Engineering JURNAL KAJIAN TEKNIK MESIN Jurnal Mesin Nusantara ARMATUR : Artikel Teknik Mesin dan Manufaktur Journal of Education Technology Information Social Sciences and Health Jurnal Indonesia Sosial Teknologi Sultra Journal of Mechanical Engineering (SJME) ILTEK : Jurnal Teknologi Sultra Journal of Mechanical Engineering
Kardiman, Kardiman
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Analysis of the Effectiveness of Solar Panel Systems in Electricity Using the Fmea Method on Smokeless Waste Burning Machines Afriadi, Reza Tri; Naubnome, Viktor; Kardiman, Kardiman
Journal of Education Technology Information Social Sciences and Health Vol 3, No 2 (2024): September 2024
Publisher : CV. Rayyan Dwi Bharata

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57235/jetish.v3i2.3167

Abstract

This research has been carried out on the analysis of the effectiveness of solar panel systems in electricity using the FMEA method on smokeless waste burning machines. This research aims to determine the problems and causes that occur in the electrical failure of solar panels in smokeless waste burning machines. This research also aims to implement and find out how effective the Failure Mode And Effect Analysis (FMEA) method is in reducing the risk of electrical power failure in the panel system. solar energy on smokeless waste burning machines. This research also analyzes the effect of damage and data processing using the FMEA method to determine the intensity of solar radiation in measurements using a luxmeter. Temperature measurements were carried out on the solar panels using a thermogun, for voltage and current measurements using a digital multimeter, while for measuring the intensity of sunlight using a luxmeter. The temperature test results in sunny weather were 39.3oC at 9:07, 42.4oC at 12:07, 34.9oC at 15:07 while in cloudy weather it was 38.5oC at 09:07, 40.3oC at 12:07, 36.9oC at 15:07. Electrical power is very different when collecting data in sunny conditions and cloudy conditions, therefore in this study the differences will be tested after and before fanning so that it can be easier to determine the effectiveness of the electrical power produced. The increase in temperature on the surface of the solar panel greatly influences the output voltage and current of the solar panel which has an impact on the output power of the solar panel. Temperatures from 09:07 to 15:07 can result in a decrease in the power produced by the solar panel, but at At the same time, the surface of the solar panel is cooled using a fan for 5 minutes, then the power produced by the solar panel directly experiences the highest increase at 11:00 with an increase in power of 3.53 watts. In accordance with the flow diagram for making FMEA for the system, several types of damage or failure that often occur in solar panel systems are collected based on several studies. Information regarding the severity level, number of occurrences and how a method can detect errors in solar power generation systems was obtained from several previous research literature and discussions with PLTS practitioners. The S, D, O values are then multiplied to get the Risk Priority Number (RPN) results which indicate which failures have a large RPN. From this mapping we can take further action to overcome failures in the solar panel system. From the results of the FMEA test analysis, it is very useful in finding out deficiencies or causes of failure in the electricity produced, in this tool there is damage to use or damage to the tool or room factors which can interfere with the process of ineffectiveness of the solar panels that produce electricity in smokeless waste burners. This.
Effect of Preheat Temperature Variation with Cooling Media on Mechanical Properties in Welding SS400 Steel Oktaviandy, Nadya Rachma; Kardiman, Kardiman; Hanifi, Rizal
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 17, No 2 (2023): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.17.2.130-142

Abstract

SS400 material is a type of low-carbon steel with a carbon content of 0.17%. It is recognized as low-carbon steel. SS400 steel is commonly employed in shipbuilding and general construction projects. This study recommends the utilization of SS400 steel in tank manufacturing through the Shielded Metal Arc Welding (SMAW) process. Before the SMAW welding process, specimens undergo a specific treatment involving preheating at temperatures of 100°C, 150°C, and 200°C. Subsequently, after preheating, specimens are welded, followed by immersion in a cooling medium, either well water or SAE 15W-40 oil. The preheating and cooling processes aim to enhance the mechanical properties of the material. Impact testing, tensile testing, and microstructure analysis were conducted to evaluate the effects of these treatments. The research results demonstrate a significant improvement in Impact energy, tensile strength, yield strength, modulus of elasticity, and strain in specimens subjected to preheating and cooling treatment. These findings indicate that the use of preheating and cooling can enhance the mechanical performance of SS400 material, providing positive benefits in construction applications that require increased strength and resilience
Effect of Doping Density and Parasitic Resistances on The Performance of Perovskite Solar Cells-based Graphene Oxide as Hole Transport Layer by SCAPS-1D Fauji, Najmudin; Kardiman, Kardiman; Suci, Farradina Choria; Hakim, Muhammad Fahmi; Efelina, Vita; Widianto, Eri
POSITRON Vol 14, No 2 (2024): Vol. 14 No. 2 Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/positron.v14i2.74606

Abstract

Perovskite solar cells (PSCs) have demonstrated remarkable improvement and promise to be produced as large-scale, low-cost devices. Several resistive losses, such as the loss current, the trapping, and the recombination of charge carriers, significantly inhibited the performance of PSCs. Typically, the series resistance (RS) and shunt resistance (RSH) of the devices influence these kinds of losses. In this study, we conduct a simulation analysis to investigate the effect of doping density and parasitic resistances (RS and RSH) on the performance of PSCs-based graphene oxide (GO) as a hole transport layer (HTL) using the SCAPS-1D. The doping density variations in HTL demonstrate improved power conversion efficiency (PCE) and fill factor (FF) as the doping density increases. Both RS and RSH significantly affect the PSC performance, as they control the shape and slopes of the current density (J-V) characteristic. The optimization method produced impressive results, including an open-circuit voltage of 0.94 V, a short-circuit current density of 22.51 mA.cm−2, a fill factor of 78.92%, and a power conversion efficiency of 16.75%. This study leads to a basic understanding of the physics of PSC devices. The proposed design provides a systematic analysis method for photovoltaic science and technology.
COOLANT CIRCULATION IMPROVEMENT ON THE CHIP TUB OF THE MACHINE LNC OKUMA 0002 PT. KOMATSU UNDERCARRIAGE INDONESIA Prastama, Muhammad Aditya Artha; Gusniar, Iwan Nugraha; Kardiman, Kardiman
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol. 15 No. 1 (2021): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.15.1.68-73

Abstract

In general, coolant is a cooling medium used to cool workpieces and cutting tools during the machining process. In PT Komatsu Undercariage Indonesia, the LNC OKUMA 0002 chip crankcase contained a lot of stagnant coolants. The factor that causes the coolant to stagnate is that the growl is wasted through the chip conveyor and the coolant is carried along with the growl to the chip. Changing the coolant fluid needs to be done in a certain phase because the use of the coolant for too long causes sand to accumulate. Excessive sand can close the cooling duct system. The quality of the coolant can deteriorate due to heat and a dirty environment. In addition, corrosion on the radiator can also result in the deposition of dirt on the coolant. When this happens, the engine overheats easily and triggers a stall. The repairs that have been carried out are examining and repairing the components of the coolant system by adding a coolant channel and a pump that functions to suck the coolant so that the coolant returns to the LNC OKUMA 0002 engine.
Pemberdayaan Masyarakat tentang Pemanfaatan Tanaman Saga (Abrus Precatorius L) di Desa Tanahbaru Pakisjaya Karawang Widianto, Eri; Santoso, Dian Budhi; Kardiman, Kardiman; Nugraha, Asep Erik
Aksiologiya: Jurnal Pengabdian Kepada Masyarakat Vol 4 No 1 (2020): Februari
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/aks.v4i1.2294

Abstract

ABSTRAKTanaman obat saat ini banyak digunakan baik sebagai obat dan perawatan kesehatan. Tanaman obat menjadi sumber bahan baku penting yang sebelumnya belum diketahui kandungan kimianya. Tanaman Saga (Abrus Precatorius L) banyak ditemukan di Indonesia seperti di Desa Tanahbaru, Pakisjaya, Karawang. Tanaman Saga banyak mengandung flavonoid, terpenoid, tanin, alkaloid dan saponin. Tanamn Saga dapat digunakan sebagai antiseptik, anti virus, anti malaria dan anti fertilitas. Pada kegiatan ini bertujuan untuk pemberdayaan masyarakat Desa Tanahbaru tentang pemanfaatan tanaman Saga. Kegiatan ini dilakukan dengan evaluasi kegiatan awal, sosialisasi, pendampingan dan evaluasi akhir kegiatan.Kata Kunci: pemberdayaan; tanaman Saga; tanaman obat. ABSTRACT Medicinal plants are being used as a drug and health care delivery system. Medicinal plants can be important source of previously unknown chemical substances. Saga (Abrus Precatorius L) abundantly found in Indonesia such as in Tanahbaru village, Pakisjaya, Karawang. Saga principally contains falvonoids, terpenoid, tanin, alkaloids dan saponin. It have been for antiseptic, anti-viral, anti-malarial, and antifertility. This activity aims to community empowerment in Tanahbaru village about Saga plants. Activities are conducted by initial evaluation of activities, socialization, assistance and final evaluation activities.Keywords: empowerment; medicinal plants; Saga plants. 
Perancangan Pelek (Velg) Sepeda Motor Listrik Berbahan Serat Karbon Pendekatan Desain Menggunakan Autodesk Inventor Professional Suejiwo, Gesang Abid; Kardiman, Kardiman
Journal of Education Technology Information Social Sciences and Health Vol 4, No 2 (2025): September 2025
Publisher : CV. Rayyan Dwi Bharata

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57235/jetish.v4i2.6242

Abstract

Perkembangan teknologi otomotif berfokus pada efisiensi energi dan pengurangan emisi karbon, sehingga kendaraan listrik seperti sepeda motor listrik semakin diminati. Pada penelitian ini dilakukan perancangan pelek sepeda motor listrik menggunakan material serat karbon yang dikenal memiliki kekuatan tinggi dan bobot yang ringan. Perancangan ini dibuat dengan bantuan perangkat lunak Autodesk Inventor Professional dan dianalisis menggunakan metode elemen hingga (FEA) untuk menguji ketahanan pelek terhadap beban operasional. Hasil simulasi menunjukkan bahwa pelek serat karbon mampu menahan beban dengan distribusi gaya yang optimal pada roda depan dan belakang, serta memiliki nilai faktor keamanan yang memadai. Pelek yang dihasilkan tidak hanya kuat tetapi juga ringan, sesuai dengan standar keselamatan yang disyaratkan. Penelitian ini menegaskan keunggulan serat karbon dalam aplikasi otomotif, khususnya pada komponen pelek sepeda motor listrik.
Pengaruh holding time pada proses hardening untuk baja S50C sebagai pisau mesin pengurai sabut kelapa Rohadin, Rohadin; Mikael, Miko; Kardiman, Kardiman
Sultra Journal of Mechanical Engineering Vol. 3 No. 1 (2024): Sultra Journal of Mechanical Engineering
Publisher : Program Studi Teknik Mesin, Universitas Sulawesi Tenggara

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

Abstract

Baja dengan berbagai kegunaannya memiliki peranan penting dalam proses permesinan dan kontruksi. Dalam pengunaanya, baja dipilih karena kekuatan keuletan dan kekerasan yang dimilikinya salah satu jenis baja yang bisa dipakai pada proses permesinan adalah baja S50C namun dalam pengunaannya sebagai bahan pisau pengurai sabut kelapa. Tujuan dari penelitian adalah sebagai berikut yaitu mengetahui hasil kekerasan material dari hasil quenching dan hardening dengan variasi waktu penahanan (holding time) lalu mengetahui nilai kekerasan spesimen raw material dengan spesimen setelah hardening dan mengetahui pengaruh struktur mikro pada baja S50C dengan menggunakan air sebagai media pendingin dengan proses hardening. Metode penelitian yang penulis gunakan adalah experimental dimana baja S50C diberi pre-hardening pada temperatur 650°C dengan holding time 10 menit lalu di hardening pada temperatur 900°C melewati temperatur austenite 727°C dengan variasi holding time 60 menit, 90 menit dan 120 menit, kemudian didinginkan secara cepat dengan air sumur dengan waktu 3 menit. Hasil penelitian menunjukan bahwa nilai kekerasan tinggi terdapat pada variasi waktu 120 menit dengan nilai kekerasan sebesar 723,53 HV (meningkat 68,30 dari raw material) dan nilai kekerasan terendah pada variasi waktu 60 menit sebesar 560,71 HV. Dari pengujian struktur mikro pada baja S50C dengan pembesaran 500x menunjukan variasi waktu 120 menit memiliki struktur mikro martensite paling banyak.
PENGARUH WAKTU CELUP HOT DIP GALVANIZE PADA BAJA KARBON ASTM A516 GRADE 70 TERHADAP KETAHANAN LAJU KOROSI MENGGUNAKAN METODE WEIGHT LOSS VARIASI PH AIR Cahaya, Tubagus Hidayatullah; Kardiman, Kardiman; Gusniar, Iwan Nugraha
Gorontalo Journal of Infrastructure and Science Engineering Vol 7, No 1 (2024): Gorontalo Journal Of Infrastructure And Science Engineering
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gojise.v7i1.3272

Abstract

The industrial sector plays a crucial role in the global economy, with energy industries, especially oil and gas, experiencing rapid growth. However, pipeline leaks due to corrosive processes pose significant challenges in this sector. Corrosion, a material degradation process occurring upon contact with the environment, requires prevention and control measures to reduce detrimental effects. Various corrosion prevention methods for steel have been developed, including galvanizing processes such as zinc-rich paint, zinc electroplating, and hot-dip galvanizing, commonly used for comprehensive protection by forming a zinc barrier on steel surfaces. Steel, a widely used construction material, especially low-carbon steel, dominates applications like vehicle manufacturing, railways, and the construction of structures such as pipes, tanks, and ships. Low-carbon steel, with less than 0.3% carbon, exhibits high toughness and malleability but is susceptible to corrosion in corrosive environments. This study focuses on the corrosion resistance of hot-dip galvanized coatings on ASTM A516 Gr 70 carbon steel in a marine environment. The research aims to evaluate the galvanization performance in preventing corrosion and extending the steel's lifespan, particularly in the context of its use as a protective coating for oil and gas pipelines. Corrosion tests using the weight loss method will assess the quality and corrosion resistance of galvanized ASTM A516 Gr 70 carbon steel. The study, underscores the importance of corrosion science in understanding and addressing corrosion challenges in industrial applications. The research is expected to provide insights into corrosion rates under specific conditions and variations in test specimens
Pengaruh holding time pada proses hardening untuk baja S50C sebagai pisau mesin pengurai sabut kelapa Rohadin, Rohadin; Mikael, Miko; Kardiman, Kardiman
Sultra Journal of Mechanical Engineering Vol 3 No 1 (2024): Sultra Journal of Mechanical Engineering
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Sulawesi Tenggara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54297/sjme.v3i1.429

Abstract

Baja dengan berbagai kegunaannya memiliki peranan penting dalam proses permesinan dan kontruksi. Dalam pengunaanya, baja dipilih karena kekuatan keuletan dan kekerasan yang dimilikinya salah satu jenis baja yang bisa dipakai pada proses permesinan adalah baja S50C namun dalam pengunaannya sebagai bahan pisau pengurai sabut kelapa. Tujuan dari penelitian adalah sebagai berikut yaitu mengetahui hasil kekerasan material dari hasil quenching dan hardening dengan variasi waktu penahanan (holding time) lalu mengetahui nilai kekerasan spesimen raw material dengan spesimen setelah hardening dan mengetahui pengaruh struktur mikro pada baja S50C dengan menggunakan air sebagai media pendingin dengan proses hardening. Metode penelitian yang penulis gunakan adalah experimental dimana baja S50C diberi pre-hardening pada temperatur 650°C dengan holding time 10 menit lalu di hardening pada temperatur 900°C melewati temperatur austenite 727°C dengan variasi holding time 60 menit, 90 menit dan 120 menit, kemudian didinginkan secara cepat dengan air sumur dengan waktu 3 menit. Hasil penelitian menunjukan bahwa nilai kekerasan tinggi terdapat pada variasi waktu 120 menit dengan nilai kekerasan sebesar 723,53 HV (meningkat 68,30 dari raw material) dan nilai kekerasan terendah pada variasi waktu 60 menit sebesar 560,71 HV. Dari pengujian struktur mikro pada baja S50C dengan pembesaran 500x menunjukan variasi waktu 120 menit memiliki struktur mikro martensite paling banyak.
Pelapisan Baja Karbon Jis S50c Menggunakan Metode Elektroplating: Variasi Pelapisan Nickel (NI) dan Chrom (CR) Terhadap Sifat Fisik dan Sifat Kimia Zha Oktaviana Dela Putri, Zha; Kardiman, Kardiman; Hanfi, Rizal
Jurnal Indonesia Sosial Teknologi Vol. 2 No. 06 (2021): Jurnal Indonesia Sosial Teknologi
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (8887.145 KB) | DOI: 10.59141/jist.v2i06.179

Abstract

Pelapisan menjadi bagian akhir dari proses produksi dari suatu produk dengan melakukan pemberian sifat tertentu pada suatu permukaan benda kerja dengan mengharapkan benda tersebut akan mengalami perbaikan terhadap sifat fisiknya mencapai bentuk setelah 6 proses pengerjaan mesin serta penghalusan terhadap permukaan benda kerja. Nikel terdapat besi dan kobalt yang sering digunakan untuk tujuan pencegahan karat dan menambah keindahan.Tujuan penelitian ini mencari pengujian sem, pengujian korosi, pengujian ketebalan dan pengujian kekerasar dari Pelapisan Baja Karbon JIS S50C dengan metode electroplating nikel dan krom dilakukan di Laboratorium Teknik Mesin Universitas Sigaperbangsa Karawang, sedangkan pengujian serta analisa hasil eksperimen material di Balai Besar Bahan dan Barang Teknik (B4T) Bandung dan pusat Penelitian Fisika di LIPI Serang. Penelitian ini menggunakan alat electroplating dan komponen bak penampung elektrolit, power supply, penjepit anoda dan katoda, heater, aerator, gerinda listrik, alat pengujur kekerasan vickers, Salt Spray Chamber dan mikrosop optik. 
Co-Authors Afriadi, Reza Tri Alfariji Munandar, Muhammad Hisson Alfatah, Muh Irfan Ananto, Putut Praditya Anjani, Ratna Dewi Aripin Cahaya, Tubagus Hidayatullah Deri Teguh Santoso Efelina, Vita Fulha, Muhammad Wildan Ainul Gusniar, Iwan Nugraha Hakim, Muhammad Fahmi Hanfi, Rizal Hanifi, Rizal Imran, Al Ichlas Johari, Agung Fahmi Kurniawan, Stefanus Aldy La Ifa Mikael, Miko Najmudin Fauji Naubnome, Viktor Nugraha, Asep Erik Oktaviandy, Nadya Rachma Prastama, Muhammad Aditya Artha Rismawati Rasyid Rizki, M Nurholis rohadin, rohadin Santoso, Dian Budhi Saputra, Reynaldi Suci, Farradina Choria Suejiwo, Gesang Abid Widianto, Eri Wilanno, Marga Rizqi Zha Oktaviana Dela Putri, Zha