., Nurrohman
UNIVERSITAS IBN KHALDUN BOGOR

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ANALISA PRESSURE DROP DENGAN PENAMBAHAN ZAT ADITIF CAIRAN COOLANT PADA PIPA SILINDER MENGGUNAKAN METODE EMPIRIS DAN METODE EKSPERIMEN Setiawan, Irwan; ., Nurrohman; Al Kindi, Hablinur
AME (Aplikasi Mekanika dan Energi): Jurnal Ilmiah Teknik Mesin Vol 4, No 1 (2018)
Publisher : UNIVERSITAS IBN KHALDUN BOGOR

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Abstract

The flow of fluid through the pipe creates fluid friction with pipe walls causing pressure drop and fluid flow velocity affecting the use of energy to drain it. Pressure drop can be affected by several factors such as friction or friction factor, pipe length, pipe diameter and fluid velocity. In this research, it will analyze pressure drop on piping system based on friction, fluid flow characteristics, and fluid velocity. The analysis was done by using two methods, namely experimental method and empirical calculation method. The stages of this study consist of problem analysis, literature study, calibration, data retrieval, empirical data processing and experiments, validation, analysis of results and conclusions. Based on the results of empirical and experimental research, the lowest pressure drop in the experiment and empirical was the 12 LPM discharge copper pipe and the water coolant ratio is 0: 100. This means that the best material pipes used were copper pipes rather than steel and galvanized pipes. The results of the tests and experiments have been tested for validation. The validation value of empirical and experimental data measurement is 91%.
STUDI EKSPERIMENTAL PENDINGIN PASIF LAMPU LIGHT EMITTING DIODE UNTUK APLIKASI FOTOGRAFI Sumantri, Yudi; Pramono, Gatot Eka; ., Nurrohman
AME (Aplikasi Mekanika dan Energi): Jurnal Ilmiah Teknik Mesin Vol 3, No 1 (2017)
Publisher : UNIVERSITAS IBN KHALDUN BOGOR

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Energy is all around us in a very clear shape and utilization. Along with the changing times, the energy is being intensively investigated with the intention to do enhancement to optimize an effective and efficient energy source. Light Emiting Diode (LED), which is one of the electronic component, is not foreign in human life. LEDs are now widely used, such as in childrens toys, traffic signs, the indicator light for the electronic equipment industry as well as photography. SMD 3528 LED strip light is a type of LED that is most widely used today. In addition to its relatively small dimensions is also due to the low electrical power consumption. In the world of photography, lighting sources is absolute existence. This study was conducted to determine the characteristics of LED Strip lights SMD 3528 with passive cooling for photographic purposes. From the experimental results, it was obtained the greater input power of is given, the value of the points that were tested was greater. Among other things, LED temperature, the temperature of the middle heat sink, the heat-sink and the outside air (ambient) and the resulting brightness. Material and cross-sectional area and shape of the heat sink greatly affected the absorption and release of heat that occurs on passive cooling.
THE INFLUENCE OF FROTHER IN FLOTATION USING ELECTROLYSIS FOR BATIK DYEING WASTE SEPARATION ., Nurrohman; ., Warjito
AME (Aplikasi Mekanika dan Energi): Jurnal Ilmiah Teknik Mesin Vol 2, No 1 (2016)
Publisher : UNIVERSITAS IBN KHALDUN BOGOR

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Batik waste can increase water characteristics such as turbidity, color and Total Suspended Solid (TSS). A technique for separating Batik from the liquid so that its turbidity, color and TSS decrease is needed. Flotation studies have been conducted using electrolysis to produce the bubbles to separate waste synthetic dye staining result of Batik from the bulk liquid. Research carried out by electrolysis with 316L stainless steel electrodes, inside an acrylic pipe with a height of 100 cm, and 8,4 cm in diameter with a voltage 15 V. Solid aluminum sulfate as a reagent was added to coagulate Batik waste as much as 1 gram per 10 ml of Batik waste. Batik waste was mixed with distilled water beforehand. Frother used was pure ethanol as much as 0.1% v/v. From the research it was discovered that flotation of Batik waste can be used for Batik waste separation with the addition of alum. Alum was proved capable of acting as collector in this type of waste separation. Ethanol as frother used was proved capable of making stable froth and increases the separation efficiency.
Computational Fluid Dynamics Analysis of A Workroom Design ., Nurrohman
AME (Aplikasi Mekanika dan Energi): Jurnal Ilmiah Teknik Mesin Vol 2, No 2 (2016)
Publisher : UNIVERSITAS IBN KHALDUN BOGOR

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Abstract

Diketahui bahwa masyarakat Jakarta menghabiskan biaya sebanyak 38,5 trilyun rupiah untuk kesehatan. Nilai ini cukup tinggi dibandingkan dengan APBN 2016 untuk kesehatan yang mencapai sekitar 67 trilyun rupiah. Enam puluh persen dari penyakit di Jakarta adalah penyakit pernapasan. Untuk kasus ruang gubernur Jakarta pada tahun 2005, diketahui bahwa jumlah partikel di kamar gubernur sekitar 45000 partikel per sentimeter kubik. Ada kemungkinan besar bahwa jumlah ini berhubungan erat dengan kualitas udara yang mengakibatkan gubernur mengalami gangguan pernafasan. Kualitas udara dipengaruhi oleh sirkulasi udara. Jadi, penting untuk merancang sebuah ruangan yang memiliki sirkulasi yang tepat dan memiliki kenyamanan termal. Sebuah model ruang kerja untuk kepala atau ketua telah dipilih sesuai dengan standar. Simulasi computational fluid dynamics (CFD) telah dilakukan untuk menentukan suhu udara masuk sehingga suhu di sekitar tempat pertemuan berada dalam keategori nyaman secara termal. Dari hasil simulasi diketahui bahwa kenyamanan termal tercapai ketika inlet suhu udara sekitar 19oC.
STUDI EKSPERIMENTAL PENDINGIN PASIF LAMPU LIGHT EMITTING DIODE UNTUK APLIKASI PADA PENERANGAN RUANGAN Hidayat, Rahmat; Eka Pramono, Gatot; ., Nurrohman
AME (Aplikasi Mekanika dan Energi): Jurnal Ilmiah Teknik Mesin Vol 3, No 1 (2017)
Publisher : UNIVERSITAS IBN KHALDUN BOGOR

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Abstract

In the present day, light emitting diode (LED) is used for domestic purposes up to the industry, such as for lighting room. Although relatively expensive, LED are highly in demand by the public because it produces a brighter light and uses very low power so it can save electrical energy. LED produces heat emanating from the chip. Generation of heat will result in the degradation of performance of the LED. To keep the performance of the LED light remains good, a process is needed for the LED to have a better heat dissipation. It is achieved by using heatsink as an element to release heat. This research is a fundamental research which aims to determine heat transfer characteristics on LED of Chip on Board (COB) type. From the experimental results, it is obtained that the greater the value of the input voltage, the higher the value of lux but the performance of the LED decreases with higher junction temperature value. The performance and light produced by the LED are highly dependent on the type of heatsink materials. When aluminum used the value of lux obtained was 1363 lm/m2 while for aluminum-copper combination the value of lux obtained was 1251 lm/m2. The value of heatsink area greatly affected the temperature of the thermal pad.