Article Per Year (5 Year)
p-Index From 2021 - 2026
0.61
P-Index
This Author published in this journals
All Journal VANOS Journal of Mechanical Engineering Education Jurnal Teknik Mesin Indonesia Jurnal Polimesin
Kimar Turnip
Universitas Kristen Indonesia
Aerospace Engineering Automotive Engineering Control & Systems Engineering Education Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
Analisis ketahanan pompa dengan penggerak arus listrik direct current Rahmad Samosir; Medyawanti Pane; Kimar Turnip; Rio Parluhutan
Jurnal Teknik Mesin Indonesia Vol. 17 No. 1 (2022): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v17i1.271

Abstract

Saat pompa air DC sudah banyak diproduksi, namun masih jarang digunakan masyarakat umum. Penggunaan dengan arus DC sangat potensial karena dapat menggunakan listrik langsung dari panel surya, akan tetapi masyarakat umum belum mengetahui keandalan pompa tersebut. Untuk mengetahui keandalan pompa tersebut, dilakukan kajian ini. Berdasarkan pengujian yang dilakukan untuk mengetahui ketahanan pompa menggunakan pompa DC dengan spesifikasi sebagai berikut: daya masimum 180 W, head maksimum 15 m, kapasitas maksimum 1,5 m3/jam dengan 12 V. Dari hasil pengujian selama 5 x 24 jam dengan head 4,9 m diperoleh hasil yaitu pada voltage 12,04 V dan 4,09 A didapat kapasitas pompa yaitu 23 liter/menit, daya pompa 50,7 W. Pada tegangan 7,7 V dan 6,02 A didapatkan kapasitas pompa yaitu 10 liter/menit, daya pompa 46,4 W. Pada tegangan 12,06 V dan 4,1 A didapatkan kapasitas pompa yaitu 20 liter/menit daya pompa 49,4 W. Sehingga dapat diambil kesimpulan bahwa dari hari pertama sampai hari ke tujuh, performa pompa dapat dinilai hanya mengalami sedikit perubahan dari 23 liter/menit menjadi 20 liter/menit.
Design of Micro Hydro Power Plant In Girimulyo Village Rahmad Samosir; Medyawanti Pane; Lionardo Lionardo; Kimar Turnip
VANOS Journal of Mechanical Engineering Education Vol 7, No 2 (2022)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/vanos.v7i2.16778

Abstract

The utilization of water as a natural resource from renewable energy for power generation is an alternative solution to replace the need for fossil fuels. In Girimulyo village, Ngargoyoso sub-district, there is a river that can be potential to become a Micro Hydro Power Plant. From field observations and calculations using the GPS (Global Positioning System) application, the water discharge Q = 0,2 m3/s. and the height of the waterfall H = 16,5 m. Based on the height and the existing water flow, it is determined that the turbine used is the Pelton turbine. From the calculation of the effective head of 15,81 m. With the water discharge used to rotate the Pelton turbine, the power obtained is 20,162 kW. From this power, it can be calculated that the shaft diameter is 38 mm. To make it easier to adjust the rotation between the generator and the Pelton turbine rotation, a flat belt type belt transmission with a width of 300 mm and a thickness of 9 mm is used while the maximum belt tension is 39 kg with a tangent angle between the pulley and the belt 7,180.
Effect of hardening holding time and tempering duration on the microstructure and hardness of CHQ 10B21 wire Melya D. Sebayang; Kimar Turnip
Jurnal Polimesin Vol 24, No 3 (2026): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i3.8473

Abstract

Heat treatment parameters play an important role in controlling the mechanical properties and microstructure of bolt materials. The research was conducted on the production of bolts produced from raw material wire CHQ 10B21. This study aims to evaluate the effect of hardening holding time and tempering duration on the hardness, tensile strength, and microstructure of CHQ 10B21 wire used for bolt production. The material was heated at 870°C with varying holding times, followed by oil quenching and tempering at 480°C with different tempering durations. Hardness testing was evaluated based on the HES D3211-99A standard with a target range of 22–32 HRC, while metallographic observations were conducted using sequential grinding and polishing. The results showed a direct relationship between holding time, tempering duration, and material properties. Longer hardening holding time increased hardness, with the highest value of 29 HRC obtained at 60 minutes, compared with 14 HRC in the raw material. Increasing tempering time improved tensile strength, reaching 891.91 N/mm² at 75 minutes after 60 minutes of hardening. Microstructural analysis showed the formation of tempered martensite and tempered bainite, with more homogeneous phase distribution at longer heat-treatment durations. These findings indicate that the optimal heat treatment condition for CHQ 10B21 bolt production is 60 minutes hardening followed by 75 minutes tempering.
Co-Authors Lionardo Lionardo Medyawanti Pane Melya D. Sebayang Rahmad Samosir Rio Parluhutan