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All Journal Eksergi: Jurnal Teknik Energi
Su”™udy, Ahmad Hamim
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Chemical Engineering, Chemistry & Bioengineering Electrical & Electronics Engineering Energy Engineering Mechanical Engineering

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OPTIMALISASI PEMANFAATAN SHM (SOLAR HOME SYSTEM) SEBAGAI PEMBANGKIT ENERGI LISTRIK RAMAH LINGKUNGAN sunardi, sunardi sunardi; Su”™udy, Ahmad Hamim; Cundoko, Anang; Istiantara, Dedik Tri
Eksergi Vol. 17 No. 2 (2021): MEI 2021
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (553.375 KB) | DOI: 10.32497/eksergi.v17i2.2165

Abstract

Energi listrik menjadikan sebuah kebutuhan yang paling mendasar dan vital bagi kehidupan masyarakat. Tidak adanya energi listrik sangat mengganggu aktifitas kehidupan manusia. Hingga saat ini masyarakat masih tergantung terhadap ketersediaan listrik PLN (perusahaan listrik negara) sehingga harus membayar harga listrik yang terus mengalami kenaikan. Selain itu, jaringan energi listrik masih belum terjangkau di daerah pedalaman, hal ini menjadi permasalahan yang sangat besar. Tujuan dari penelitian ini adalah mengembangkan teknologi pembangkit listrik solar home system yang ramah lingkungan, mudah dan efisien. Solar home system dirancang menggunakan akumulator 12V/40AH, beban lampu 100W dan panel surya 20V/5A. Pengembangan SHM selanjutnya dilakukan pengukuran, perhitungan teknis, perhitungan ekonomis dan analisis permasalahan. Hasil dari penelitian dapat diketahui rekomendasi Solar home system sebagai eksplorasi energi yang terbarukan, bersih, ramah lingkungan, investasi jangka panjang, praktis, dan cocok untuk daerah tropis seperti Indonesia.
Case Study of Heat Transfer on Heater Performance of Injection Molding Machines Before and After Maintenace Surindra, Mochamad Denny; Su”™udy, Ahmad Hamim; Hermawan, Baktiyar Mei; Aulia, Nur Fatowil; Priyoatmojo, Slamet; Sumarno, F. Gatot; Suwoto, Gatot
Eksergi Vol. 18 No. 3 (2022): SEPTEMBER 2022
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v18i3.3891

Abstract

Injection molding is a thermoplastic material forming method in which the material melted by heating is injected by a plunger into a water-cooled mold so that it hardens. Molding companies have a classic problem with heaters used to heat plastic ores. One of the companies using the Yizumi UN160SK Injection Molding Machine with polystyrene plastic ore faced a heater malfunction that disrupted the production process.A case study of heater performance was carried out to find out signs of damage, what condition the heater was in (electricity consumption, heat generated and the condition of the plastic ore melt).
Investigation of Double Screw Compressor Characteristic based on Experimental in Industry Aulia, Nur Fatowil; Surindra, Mochamad Denny; Su”™udy, Ahmad Hamim; Apriandi, Nanang; Ulum, Muhammad Showi Nailul; Priyoatmojo, Slamet
Eksergi Vol. 19 No. 03 (2023): SEPTEMBER 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v19i03.5038

Abstract

Large-scale compressed air equipment is the only way to meet the demand for air for production facilities such as the pharmaceutical, automotive, or combustion processes industries. As one of the main driving components in the air compressor system, the double screw determines the reliability and performance of the entire compressed air system. Double screw compressors are a promising option for use in large-scale compressed air systems due to their high efficiency and reliability. The double screw profile has been specially designed to increase compression capability over a period of more than 24 hours with a range of 400 to 385 m3 per hour. The cooling oil works well keeping the compressor temperature constant at around 100 0C, even though there are very active temperature fluctuations. On the working pressure side the compressor as a whole is constant, although there is a significant spike in the dryer pressure. The dryer pressure experienced a significant increase reaching 6.9 Bar in the sixth data collection, while the cooling oil pressure and tank pressure were the same at 6.6 Bar, and the air pressure was 6.3 Bar. The results of observing the performance of compressors during industrial operation have presented the ideal working conditions for double screw compressors reaching 58.4 kJ/kg, while the actual working conditions of compressors are 66.6 kJ/kg. Overall, the average compressor efficiency is 87.81%.
Numerical Study Of The Influence Of Air Flow Through Rectangular Elbow 90 ° With Triangle Inlet Body Disturbance Aulia, Nur Fatowil; Faradis, Luke Ezra; Su”™udy, Ahmad Hamim; Safarudin, Yanuar Mahfudz; Mulyono, Mulyono; Hermawan, Baktiyar Mei; Sutanto, Bayu
Eksergi Vol. 20 No. 01 (2024): JANUARY 2024
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v20i01.5440

Abstract

AbstrakThis research is to determine the effect of air flow flowing through a 90 ° square elbow with the additional shape of a triangle inlet disturbance body. Simulations were carried out using the Computational Fluid Dynamics (CFD) method to analyze air flow characteristics and changes in flow patterns due to the presence of additional triangular shapes in the flow channel. Numerical simulations are carried out by taking the 90 ° square elbow geometry as the basic model and adding an additional triangle inlet disturbance body shape to it. The simulation results show that the triangle inlet disturbance body significantly influences the air flow inside the elbow. This effect can increase turbulence producing different pressure and velocity contours along the elbow. The effect of flow velocity on the flow in the elbow results in a higher velocity if the form of disturbance is also greater. This research could provide greater understanding of the influence of additional components on fluid flow in channels with similar geometries, opening up potential applications across a wide range of industries.Keywords”” Air flow simulation, Triangle Disturbance, Pressure, Speed
Co-Authors Aulia, Nur Fatowil Cundoko, Anang F. Gatot Sumarno, F. Gatot Faradis, Luke Ezra Gatot Suwoto Hermawan, Baktiyar Mei Istiantara, Dedik Tri Mochammad Denny Surindra Mulyono Mulyono Nanang Apriandi Slamet Priyoatmojo, Slamet Sunardi Sunardi Sunardi Sutanto, Bayu Ulum, Muhammad Showi Nailul Yanuar Mahfudz Safarudin