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All Journal Jurnal Simetris Machine : Jurnal Teknik Mesin Energi & Kelistrikan Jurnal Teknologi Terapan Jurnal Abdimas PHB : Jurnal Pengabdian Masyarakat Progresif Humanis Brainstorming Piston: Journal of Technical Engineering Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Jurnal Elektra BERNAS: Jurnal Pengabdian Kepada Masyarakat Quantum Teknika Jurnal Pengabdian Masyarakat Indonesia Kreator Ramatekno
Lukman Nulhakim
Politeknik Enjinering Indorama
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The Effect of Spindle Speed on The Surface of Teak Wood Work Pieces on A 3 Axis CNC Router Machine : The Effect of Spindle Speed on The Surface of Teak Wood Work Pieces on A 3 Axis CNC Router Machine nulhakim, lukman
Kreator Vol. 12 No. 1 (2025): Kreator
Publisher : P3M Politeknik Negeri Media Kreatif

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46961/kreator.v12i1.1625

Abstract

The effectiveness of machining process time and surface roughness quality are the main factors for evaluating whether the machining product is acceptable or not. Spindle speed is one way to maximize process time. This study aims to determine the effect of spindle speed variations on the surface roughness of objects made of teak wood material using a 3-axis CNC router machine. The research method uses an experimental method on objects made of teak wood using spindle speed variations of 4000, 6000, and 8000 RPM. Then the surface roughness measurements were carried out, and the measurement results were analyzed to determine the effect of spindle speed variations. The results of the study on the surface roughness of objects, spindle speed 8000 RPM produced a Ra value of 10.988 µm which is the lowest Ra value.
Design and Construction of a Satay Grill Based on Thermoelectric Generator as a Source of Electrical Energy Nulhakim, Lukman; Syafrizal; Tauvana, Ade Irvan; Widodo; Nurhidayatuloh, Farhan
Piston: Journal of Technical Engineering Vol. 8 No. 2 (2025)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v8i2.48616

Abstract

Thermoelectric Generator is a technology used to generate electrical energy by utilizing the Seebeck effect, which occurs due to the temperature difference between the hot and cold sides. This study aims to determine the voltage generated by the thermoelectric generator from the process of burning satay using coconut shell charcoal. In this experiment, 6 pieces of thermoelectric generator type TEG1-241-1. 4-1. 2 were used which were connected in series. The pieces were mounted on aluminum material measuring 165 x 110 x 15 mm, and equipped with a heatsink at the bottom of the satay grill body for cooling. The heatsink used is an extrude model. Testing began when the charcoal had reached a red color. The maximum voltage generated reached 2,25 V in seven minutes, with a temperature difference reaching 5,9 °C. The temperature on the hot side was recorded at 102,2 °C, while on the cold side it was 96,3 °C.
Analysis of the Effect of Adding a Water Heater to the R290 Split Air Conditioning Instead of R22 Widodo; Nulhakim, Lukman; Syafrizal; Tauvana, Ade Irvan; Kurnia, Deva Arya; Asmoro, Purwandito Tulus
Piston: Journal of Technical Engineering Vol. 8 No. 2 (2025)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v8i2.48846

Abstract

The heat generated by split air conditioning (AC-Split) is sufficiently high to be utilized as a heat exchanger. The installation of a heat exchanger device, referred to as an Air Conditioning Water Heater (ACWH), is used to heat water in a tank by utilizing the waste heat from the condenser. In this study, refrigerant R290 will be used as a replacement for R22, with the aim of eliminating the Ozone Depleting Potential (ODP) and Global Warming Potential (GWP) associated with R22. Calculations are carried out to ensure the performance of the split AC by testing each refrigerant, R22 and R290, installed in the heat exchanger system. The test data is calculated and analyzed based on the performance on the vapor compression diagram. The results of the performance calculations of each R290/R22 refrigerant COP: 9.7/6.4, compression work: 28.7/25.72 kJ/kg, cooling effect, and electrical power: 881/976 Watts. The calculation results of R290 have better performance compared to R22, especially in electrical power. R290 is 10% lower than R22, COP is 34% higher, and it is ODP and GWP-free.
RANCANG BANGUN KOMPOR ARANG DENGAN MODIFIKASI TERMOELEKTRIK GENERATOR Nulhakim, Lukman; Syafrizal; Irvan Tauvana, Ade; Fernandha, Endricko
JURNAL RAMATEKNO Vol 5 No 2 (2025): Jurnal_Ramatekno_vol_5_no_2_2025
Publisher : LPPM Politeknik Enjinering Indorama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61713/jrt.v5i2.266

Abstract

Termoelektrik generator merupakan sebuah teknologi yang digunakan untuk menghasilkan listrik dengan memanfaatkan efek Seebeck yang terjadi akibat perbedaan suhu panas dan dingin pada kedua sisinya. Penelitian ini bertujuan untuk mengetahui tegangan yang dihasilkan oleh termoelektrik generator dari proses pembakaran pada kompor dengan menggunakan arang tempurung kelapa sebagai bahan bakarnya. Pembangkit listrik ini memanfaatkan 7 termoelektrik generator tipe TEG1-241-1.4-1.2 yang disambungkan secara seri dan dipasang pada material logam sebagai penghantar panas pada kompor yang berukuran 270 x 270 x 250 mm serta dilengkapi dengan heatsink. Heatsink yang digunakan sebagai pendingin merupakan model extrude. Pengujian dilakukan selama 30 menit, dimana tegangan dan kuat arus maksimum yang dihasilkan mencapai 1,54 V dan 1,43 A dalam waktu 18 menit dengan perbedaan temperatur 13,5 oC, dimana sisi panas dan sisi dingin pada TEG memiliki temperatur sebesar 124,8 oC dan 111,3 oC. Semakin besar perbedaan temperatur panas dan dingin pada sisi TEG semakin besar pula tegangan yang dihasilkan.
Co-Authors Ade Irvan Tauna Ade Irvan Tauvana Akmalia, Nurul Anugrah, Hari Ardiani, Septia Asmoro, Purwandito Tulus Dwiputra, Aditya Yudhistira Fernandha, Endricko Ferriawan Yudhanto, Ferriawan Kurnia, Deva Arya Mokhamad Is Subekti Mokhamad Is Subekti Mokhamad Is Subekti Mokhamad Is Subekti Mulyani, Yayu Musawarman, Mr. Nurhidayatuloh, Farhan Prambandono, Bayu Rachmanu, Fatkur Rahmayanti, Handika Dany syafrizal Syafrizal Syafrizal syafrizal syafrizal Tauvana, Ade Widodo Widodo Widodo Widodo Widodo Wisnujati, Andika Yusuf, Mirza