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All Journal Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Abdi Laksana : Jurnal Pengabdian Kepada Masyarakat JTTM: Jurnal Terapan Teknik Mesin
Subroto
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Chemistry Control & Systems Engineering Economics, Econometrics & Finance Education Engineering Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Physics Social Sciences Other

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Computational Fluid Dynamic Analysis of Turbo Cyclone and Intake Manifold Spacer on Honda Supra Fit Sarjito; Sandhika Putra Pratama; Wijianto; Subroto
JTTM : Jurnal Terapan Teknik Mesin Vol 3 No 1 (2022): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Sekolah Tinggi Teknologi Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v3i1.161

Abstract

The need for human mobility is constantly increasing over time, so the demand for vehicle production mass is still relatively high. A large number of conventional vehicle use makes the impact of dependence on fuel oil. This dependence is very threatening for various aspects. Increasing the combustion efficiency in the engine room is necessary. Turbo cyclone is an additional component applied to the intake manifold, which causes the originally linear inflow to rotate (swirl) and mix fuel with air more maximally in the combustion engine to increase the combustion efficiency. Recently, we fabricated and characterized turbo cyclone and intake manifold spacer to increase the combustion engine's performance. Turbo cyclone designed in two different blades with a degree 400 with an angle of inclination blade. Intake manifold spacer designed with 24 grooves with a 400 angle. A selected sample in this research is the Honda Supra Fit 125CC year 2006. In this study, to increase the combustion engine's performance, we applied the 3-blade turbo cyclone and 4-blade turbo cyclone in the air filter. We applied an intake manifold spacer between the combustion engine and carburetor. Computational Fluid Dynamic (CFD) of turbo cyclone and intake manifold spacer is shown the changing in velocity, pressure, and turbulence intensity. The specific result shown in 4-blade turbo cyclone with change in velocity is 0.14009 m/s, with pressure drop -0.04582 Pa, and the change of turbulence intensity value is 2.44536 % explain that the turbulence condition is a medium-turbulence case. The unspecific result in the intake manifold spacer shows only a change in velocity 0.26269 m/s with a pressure drop of only -0.00673 Pa, which means the inner flow profile is almost linear. It proves from turbulence intensity value only 0.41247 % explain that internal air-flow in low-turbulence flow condition. Based on turbulence case from turbulence intensity, it has shown increased performance in the medium-turbulence case. These results suggest that turbo cyclone and intake manifold spacer can increase the performance of combustion engines.
Comparison of Alum and Poly Aluminum Chloride Coagulant Performance on Turbidity and pH of Lematang Enim PDAM Raw Water Komala, Ria; Subroto; Sisnayati; Dwipayana, Hendra; Nurlela
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 21 No. 1 (2024): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v21i1.13749

Abstract

Raw water is natural water found in lakes, rivers, streams, and underground sources before any treatment or purification processes. It typically contains various impurities, such as suspended solids, organic matter, pathogens, and dissolved minerals, which need to be removed to make it safe for consumption. Aluminum Sulfate and Poly Aluminum Chloride (PAC) are two commonly used chemicals in the treatment of raw water to remove impurities and make it suitable for drinking, industrial, or agricultural purposes. These chemicals play crucial roles in the purification process by aiding in the coagulation and flocculation of contaminants, which facilitates their removal through filtration. Study on raw water treatment using Aluminum Sulphate and Poly Aluminum Chloride (PAC) coagulants was carried out at Talang Jawa IPA PDAM Lematang Enim of Muara Enim District by taking raw water samples from Talang Jawa Intake and Pelita Sari Intake. This study aimed to find out the right type and dose of coagulant in the raw water treatment process.  he test parameters were turbidity and pH values. The research was conducted using a jar test to determine the dose of coagulant. The results showed the use of solid PAC was more effective for both intakes. The optimum coagulant dose is 20 ppm PAC in the raw water of Talang Jawa intake and Pelita Sari intake with turbidity of 2.62 NTU and 4.15 NTU and pH of 7.8 and 7.6.
PENYULUHAN HUKUM: KESADARAN HUKUM PADA ANAK YANG BERHADAPAN DENGAN HUKUM PADA ANAK BINAAN DI LAPAS KHUSUS ANAK (LPKA) KELAS IIA JAKARTA Yhogi Singgih Gunawan; Giyats Rif'at Afifi; Putri Indraswari Susilo; Subroto; Dwi Yuliani; Yoyon M Darusman; RR Dewi Anggraeni; Endi Arofa
Abdi Laksana : Jurnal Pengabdian Kepada Masyarakat Vol 5 No 2 (2024): Abdi Laksana : Jurnal Pengabdian Kepada Masyarakat
Publisher : LPPM Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/abdilaksana.v5i2.40781

Abstract

Tujuan dari kegiatan pengabdian kepada masyarakat ini adalah untuk dapat meningkatkan pemahaman tentang Anak Berhadapan dengan Hukum (ABH) bagi anak-anak. Anak Berhadapan Hukum dapat disebut sebagai Anak yang Berkonflik dengan Hukum yang selanjutnya disebut Anak adalah anak yang telah berumur 12 (dua belas) tahun, tetapi belum berumur 18 (delapan belas) tahun yang diduga melakukan tindak pidana. Beberapa dampak negatif yang dialami oleh ABH diantaranya anak mengalami diskriminasi, menjadi kurang percaya diri, serta memperoleh perundungan oleh lingkungan sebayanya. Tidak jarang ABH, baik itu pelaku, saksi atau bahkan korban menjadi tertekan dan akhirnya mengalami depresi dengan kondisi ini. pentingnya untuk menjaga nama ataupun privasi dari anak menjadi hal terpenting dalam proses hukum. Hasil dari kegiatan ini, Pertama diharapkan bisa memberikan pemahaman kepada ABH agar dapat mencegah anak-anak lain untuk tidak berhadapan dengan hukum. Kedua, apabila terdapat anak yang telah berhadapan dengan hukum, maka berusaha untuk dapat memberikan pemahaman kepada para anak-anak tersebut agar mereka tidak mengulangi perbuatannya, sehingga pertumbuhan anak-anak yang berhadapan hukum terus dapat diminalisir. Dampak dari kegiatan ini adalah para anak-anak dan orang tua memahami dan mengerti tentang apa yang perlu untuk dilakukan ketika berhadapan dengan hukum.
Co-Authors Anggraeni, RR Dewi Dwi YULIANI Dwipayana, Hendra Endi Arofa Giyats Rif'at Afifi I Ketut Suada Nurlela Putri Indraswari Susilo Ria Komala Sandhika Putra Pratama Sarjito Sisnayati Sisnayati Yhogi Singgih Gunawan Yoyon M Darusman