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Purwoko, Yohanes Agung
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Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Industrial & Manufacturing Engineering

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ANALISA POMPA COOLING WATER SUPPLY UNTUK MENGHASILKAN STANDAR POMPA YANG EFISIEN DI COOLING TOWER 4 PT EFG Purwoko, Yohanes Agung; Ridho Febrianto, Fendi; Susilo, Ade; Febriyanto, Rusdi
Technologic Vol 15 No 1 (2024): TECHNOLOGIC
Publisher : LPPM Politeknik Astra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52453/t.v15i1.382

Abstract

PT EFG Casting Plant is a manufacturing company that produces engine components used for Daihatsu car engines and some Toyota car engines. The production process is closely related to the high-temperature molding process using a casting machine. Overall, it is cooled using water from a cooling tower and the water is supplied using 2 pumps. An analysis was carried out which aims to determine the efficiency of the two cooling water supply pumps and from the results of this analysis obtained a low efficiency of 66% for each pump, this is because there is a 50% closure of the valve after the cooling water supply pump and if the valve is not done closing can cause cavitation in the pump. The low efficiency of the pump motor can result in less than optimal use of electric power in the pump. To overcome this problem the authors make improvements by providing standard pumps that have optimal efficiency in piping installations at PT EFG. So that from the results of these calculations it was found that initially using two cooling water supply pumps to meet the needs of cooling water, it can be reduced and replaced by using one efficient pump and power use can be optimized. Pump motor efficiency can increase up to 74% and can reduce the use of electric power by 53,049.9 kWh. Keywords: cooling tower, pump efficiency, pump standardization, energy.
OPTIMALISASI PROSES DENGAN METODE COMMONIZE BOOTH B UNTUK MATERIAL X** TWO TONE KANSAI PAINT di LINE TOPCOAT PT ASTRA DAIHATSU MOTOR Purwoko, Yohanes Agung; Mukhtariz, Akmal; Edi Widyartono, Andreas; Amri, Mahardhika; Febriyanto, Rusdi
Technologic Vol 15 No 1 (2024): TECHNOLOGIC
Publisher : LPPM Politeknik Astra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52453/t.v15i1.431

Abstract

Abstract – PT. Astra Daihatsu Motor Karawang Assembly Plant is a manufacturing company in Indonesia that produces four-wheeled vehicle models for the Daihatsu and Toyota brands. The Painting process is one of the processes in a series of car manufacturing processes at PT. Astra Daihatsu Motor Karawang Assembly Plant. After collecting data related to the achievement of the KPI (Key Performance Index) of the Painting Department, several aspect points were obtained that had not reached the target, one of which was a process aspect point related to efficiency. After being broken down, the Tocpoat Line becomes the main process with the lowest efficiency, which only reaches 87%. With the current achievement of efficiency, in one hour Topcoat is only able to produce 62.6 units/hour from the target of 68.7 units that must be produced. However, with the ability of the current topcoat, it causes a loss of 5.1 units/hour and must be done overtime at the end of production. Therefore, a deeper study was carried out using the QCC 8 Step method which focused on the Topocoat production line, as well as making improvements to one of the efficiency problems, namely Heijunka X** Twotone with the target of increasing efficiency, meeting supply unit needs towards touch ups, and reducing unit loss per hour on the Topcoat production line. After this analysis and improvement was carried out, it was seen that the results of changes in efficiency increase were achieved, which reduced unit loss in the topcoat and were able to save costs related to overtime.Keywords : Pinting Departement KPI, Efficiency Topcoat, Target Unit, Overtime.
PREDIKSI JALUR JALAN BERBASIS KALMAN FILTER PADA SISTEM ADAS (ADVANCE DRIVING ASSISTANCE SYSTEM) MENGGUNAKAN HOUGH TRANSFORM DENGAN KAMERA BERSUDUT PANDANG TERBATAS WIDYARTONO, ANDREAS EDI; PURWOKO, YOHANES AGUNG; KESAWA, I NYOMAN
Technologic Vol 16 No 1 (2025): TECHNOLOGIC
Publisher : LPPM Politeknik Astra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52453/t.v16i1.472

Abstract

Deteksi jalur jalan (road lane detection) merupakan komponen penting dalam sistem bantuan pengemudi cerdas kendaraan otonom. Namun, tantangan muncul ketika kamera dipasang pada kaca depan bagian atas kendaraan dengan sudut pandang terbatas, terutama saat kendaraan berbelok. Keterbatasan ini menyebabkan area region of interest (ROI) menjadi sempit, bahkan jalur tidak terdeteksi sama sekali. Penelitian ini mengusulkan pendekatan kombinasi antara metode deteksi garis berbasis Hough Transform Probabilistik (HoughLinesP) dan prediksi posisi jalur menggunakan Kalman Filter. Ketika jalur hanya sebagian terdeteksi atau tidak terdeteksi karena keterbatasan sudut kamera, Kalman Filter digunakan untuk memprediksi posisi jalur berdasarkan pergerakan titik-titik sebelumnya. Hasil eksperimen menunjukkan bahwa pendekatan ini mampu mempertahankan estimasi posisi jalur secara stabil dan akurat meskipun terjadi kehilangan sebagian informasi visual akibat keterbatasan pandangan kamera. Metode ini meningkatkan keandalan sistem deteksi jalur dalam kondisi lingkungan dinamis dan sudut pandang sempit.
Co-Authors Amri, Mahardhika Andreas Edi Widyartono Edi Widyartono, Andreas Febriyanto, Rusdi KESAWA, I NYOMAN Mukhtariz, Akmal Ridho Febrianto, Fendi Susilo, Ade