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All Journal Majalah Ilmiah MOMENTUM Turbo : Jurnal Program Studi Teknik Mesin JURNAL TEKNIK Motor Bakar : Jurnal Teknik Mesin DEVICE Community Services and Social Work Bulletin Prosiding Seminar Nasional Rekayasa dan Teknologi (TAU SNAR- TEK)
Yafid Effendi
Jurusan Teknik Mesin, Fakultas Teknik, Universitas Diponegoro Jl. Prof. H. Soedarto, SH, Tembalang, Semarang 50239
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation

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Journal : jurnal teknik

 1 
Analisa Pengaruh Head (Tinggi Jatuh Air) Terhadap Putaran Pompa Pada Turbin Pelton Skala Laboratorium Taufan, Muhammad; Effendi, Yafid
Jurnal Teknik Vol 12, No 2 (2023): Juli - Desember 2023
Publisher : Universitas Muhammadiyah Tangerang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31000/jt.v12i2.10125

Abstract

Turbin pelton adalah salah satu jenis pembangkin listrik tenaga micro hydro yang dikembangkan di Indonesia dengan memanfaatkan energi potensial dan energi kinetik yang ada pada air untuk diubah menjadi energi listrik. Dalam skema kerja turbin pelton memerlukan dua hal, yaitu debit air dan tinggi jatuh air (head) untuk menghasilkan tenaga yang dapat dimanfaatkan. Maka dari itu, bahwa kenaikan daya dipengaruhi oleh tingginya head dan debit air yang banyak, semakin banyak debit air yang keluar dari nozzle maka semakin besar juga tegangan listrik yang dihasilkan oleh turbin. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh head (ketinggian jatuh air) terhadap putaran pompa pada turbin pelton skala labolatorium dan untuk mengetahui head effective yang dibutuhkan agar turbin pelton dapat bekerja dengan maksimal. Metode yang digunakan dalam penelitian ini eksperimen yaitu dengan pengambilan data dan uji coba. Hasil penelitian ini menunjukkan semakin tinggi head acctual dan debit air yang digunakan maka akan semakin besar pula head effective, debit air, daya turbin dan daya listrik yang dihasilkan. Pada variasi head actual 5 m sd 5,5 m dengan rentang 0,1 terhadap head effective, debit air, daya turbin dan daya listrik. Hasi tertinggi terjadi pada Head Actual maksimum yaitu 5,5 meter dengan Head Effective 3,67 meter menghasilkan debit air 0,004374 m3/s, daya turbin 125,85 Watt dan daya listrik 113,27 Watt.
Peningkatan Performa Termal Dengan Menggunakan Vortex Generators Didalam Saluran Persegi Panjang Effendi, Yafid; Rosyidin, Ali; Setiawan, Bambang
Jurnal Teknik Vol 13, No 1 (2024): Januari - Juli 2024
Publisher : Universitas Muhammadiyah Tangerang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31000/jt.v13i2.14222

Abstract

Vortex generators (VGs) are an effective method for improving the thermal performance of heat exchangers. This study aims to optimize the heat transfer rate by employing VGs, where airflow passes over a heated cylinder within a rectangular duct equipped with vortex generators. An experimental approach was conducted to investigate the enhancement of heat transfer using concave delta winglet (CDW) and delta winglet (DW) VGs, compared to the baseline condition without VGs. The experiments involved variations in the angle of attack (β) at 10°, one VG pairs, and the arrangement types (in-line and staggered). The cylinder was heated with a constant power of 35 W, reaching a surface temperature of 38 °C, and airflow velocities ranged from 0.4 to 2 m/s. Temperature measurements were taken at the inlet, outlet, and cylinder surface using thermocouples. The research results indicate a significant enhancement in the convective heat transfer coefficient when using vortex generators (VGs). Among the various configurations tested, the staggered concave delta winglet pair (CDW) arrangement demonstrated the highest values in terms of convective heat transfer coefficient, friction factor ratio, and performance evaluation criterion (PEC), followed by the in-line CDW, staggered delta winglet pair (DW), and in-line DW configurations. The highest convective heat transfer coefficient was observed in the staggered CDW configuration, reaching 16.02%. The friction factor ratio (f/fo) for this configuration was 108.67%. The highest PEC value, 26.34%, was achieved with a single staggered CDW pair at a Reynolds number of Re = 11,000.
Peningkatan Performa Termal Dengan Menggunakan Vortex Generators Didalam Saluran Persegi Panjang Effendi, Yafid; Rosyidin, Ali; Setiawan, Bambang
Jurnal Teknik Vol. 13 No. 1 (2024): Januari - Juli 2024
Publisher : Universitas Muhammadiyah Tangerang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31000/jt.v13i2.14222

Abstract

Vortex generators (VGs) are an effective method for improving the thermal performance of heat exchangers. This study aims to optimize the heat transfer rate by employing VGs, where airflow passes over a heated cylinder within a rectangular duct equipped with vortex generators. An experimental approach was conducted to investigate the enhancement of heat transfer using concave delta winglet (CDW) and delta winglet (DW) VGs, compared to the baseline condition without VGs. The experiments involved variations in the angle of attack (β) at 10°, one VG pairs, and the arrangement types (in-line and staggered). The cylinder was heated with a constant power of 35 W, reaching a surface temperature of 38 °C, and airflow velocities ranged from 0.4 to 2 m/s. Temperature measurements were taken at the inlet, outlet, and cylinder surface using thermocouples. The research results indicate a significant enhancement in the convective heat transfer coefficient when using vortex generators (VGs). Among the various configurations tested, the staggered concave delta winglet pair (CDW) arrangement demonstrated the highest values in terms of convective heat transfer coefficient, friction factor ratio, and performance evaluation criterion (PEC), followed by the in-line CDW, staggered delta winglet pair (DW), and in-line DW configurations. The highest convective heat transfer coefficient was observed in the staggered CDW configuration, reaching 16.02%. The friction factor ratio (f/fo) for this configuration was 108.67%. The highest PEC value, 26.34%, was achieved with a single staggered CDW pair at a Reynolds number of Re = 11,000.
Co-Authors Ahmad Ramdhani, Ahmad Alvian Demaz Peramutya Ashar, Ilham Ariawan Bambang Setiawan Dwi Setiawan, Agung Efrizal Efrizal Fahmi, Muhammad Idrokul Farhan Putra Arya, M. Iqbal Fattah, Fanni Irfan, Akhmad Muhammad Taufan Muhammad, Rouf Mujiono Mujiono Nugroho, Agung Oktarina Heriyani Pangestu, Anugrah Widhi Pratama, Putra Dafa Ramadan, Hamdan Riyanto Riyanto Rizki Dwi Ardika Rohmat Taufiq Rosyidin, Ali Rozaki, Syahrul Maulana Safi'i, Muhamad Safi‘i, Muhamad Saputra, Muhamad Juli Suheri Suheri Kertosenjoyo2, Suheri Susanto Susanto Waluyo, Bambang Suhardi Wibi Pramanda