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All Journal Jurnal Mechanical Turbo : Jurnal Program Studi Teknik Mesin JURNAL POLI-TEKNOLOGI Logic : Jurnal Rancang Bangun Dan Teknologi
Aa Setiawan
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Pengaruh Campuran High Purity Metanol (HPM) –Solar Menggunakan Sistem EGR terhadap Performa dan Emisi Jelaga Pada Mesin Diesel Injeksi Langsung Aa Setiawan; Syaiful Syaiful
JURNAL MECHANICAL Vol 7, No 1 (2016)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/mech.v7.i1.201604

Abstract

Penelitian ini mempelajari pengaruh campuran HPM dan solar  terhadap performa dan penurunan emisi jelaga pada mesin diesel. Parameter yang menjadi pertimbangan adalah torsi, daya, konsumsi bahan bakar spesifik dan efisiensi termal serta kepekatan asap. Sebuah mesin diesel injeksi langsung, 4 langkah, berpendingin air, naturally aspirated, Isuzu 4JB1, yang dilengkapi dengan sistem cooled-EGR digunakan pada penelitian ini dengan menggunakan campuran bahan bakar HPM-solar dengan rasio  0/100 5/95, 10/90, dan 15/85 berbasis volume dengan melakukan variasi pembebanan dari 25% sampai dengan 100%  dengan interval 25%, pada putaran mesin konstan 2000 rpm. Pada setiap pembebanan, EGR divariasikan dengan laju EGR 0%, dan 100%.Hasil penelitian menunjukkan bahwa, dibandingkan dengan solar 100%,  pemakaian campuran bahan bakar menurunkan daya mesin sebesar 4,69%, dimana daya semakin menurun seiring meningkatnya kandungan HPM. Diamati juga bahwa pemakaian campuran bahan bakar akan meningkatkan BTE sebesar 14,7%, sedangkan nilai BSFC,mengalami penurunan sebesar 10,29%. Pada sisi emisi, penggunaan campuran bahan bakar menurunkan emisi jelaga sebesar 59,32%dimana emisi jelaga menurun seiring dengan bertambahnya HPM dalam campuran bahan bakar. Berdasarkan hasil penelitian, kandungan H85M15 menghasilkan torsi dan daya yang mendekati diesel serta penurunan emisi jelaga tertinggi, sementaraH95M5 memberikan hasil terbaik dari sisi BSFC dan BTE.Kata kunci: Metanol Kadar Tinggi, EGR-Dingin, Mesin Diesel, Kepekatan Asap
Rancang Bangun Boiler Pemanas Tahu Kapasitas 90 kW Dengan Tungku Gasifikasi Berbahan Bakar Sekam Padi Ahmad Maulana Kartika; Aa Setiawan; Dedi Suwandi; Wardika Wardika
JURNAL MECHANICAL Vol 8, No 2 (2017)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/mech.v8.i2.201708

Abstract

Boilers that used in the tofu industry in Indramayu are still use firewood as a fuel. The use of firewood as a fuel in boiler is not effective because it affects the destruction of forests as producers of plants (timber) and oxygen in earth. On the other hand there are also many rice husks that mount in the rice mill and has not been utilized by the surrounding community. Therefore, this research is conducted to utilize rice husk as fuel in boiler for cooking tofu with boiler. This research begins by doing a survey in the field of industry to know about the capacity of traditional wood-fired boilers, which capacity is obtained of 90kW capacity. Then the next step is making boiler husk based on the existing calculations to determine the size of the boiler to be made. Data retrieval is carried out until the temperature of the air boils with a tolerance of up to 30 minutes. Based on the results of the test, the rice husk boiler that has a capacity of 98.3 kW, greater than the value of designing that only 90 kW capacity of combustion and able to heat 190 kg of water within 35 minutes, so it can be used as a substitute of firewood boiler.
TESTPERFORMANCE OF MINIATUR BOILER FOR DRYING KERUPUK WITH VARIOUS PRESSURE AND VARIOUS DIRECTION OF AIR CIRCUITS Ahmad Maulana Kartika; Aa Setiawan; Wardika Wardika
TURBO [Tulisan Riset Berbasis Online] Vol 6, No 2 (2017): Desember 2017
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (713.611 KB) | DOI: 10.24127/trb.v6i2.533

Abstract

In the industrial center of kerupuk in Indramayu, drying kerupuk by using boiler is done if the weather conditions are cloudy or rainy. The kerupuk drying process uses the boiler by utilizing a steam pressure of 4 bar and passing it to the heat exchanger (hx) for heating air in the drying chamber. To achieve 4 bar pressure on the boiler takes a long time, about 3-4 hours duration so it is less effective in its use. If the steam working pressure on the boiler is reduced to 3 or 2 bar, it will likely save the drying time of the kerupuk. For that we need to test the process of drying kerupuk with pressure variations 2, 3 and 4 bars in order to know the difference in performance. In addition to variations of vapor pressure, the test is also carried out with variations in the direction of air flow to the position of the dried kerupuk, ie the position of vertikal direction and horizontal direction position but with the same pressure that is 4 bar. The test was carried out on a miniatur kerupuk dryer boiler with a design tailored to the conditions in the field. From the test results obtained the value of loss of drying (LOD) kerupuk at 4 bar pressure has a value of 46.4% and 43.8%, while at pressure 3 and 2 bar LOD values 38.4% and 31.1%. It can be said that the working pressure of 4 bar is indeed an effective pressure to be used in the process of drying the kerupuk. For the combustion efficiency of the boiler also, the pressure of 4 bar is higher when compared to the efficiency at 3 and 2 bar pressure. As for the direction of air flow, the direction of the vertikal position of the kerupuk more effectively used in the process of drying kerupuk compared the horizontal direction.Keywords: boiler, heat exchanger, loss of drying, efficiency.
Analysis of The Effect Evaporator Fan Rotation Variations on Air Blast Freezer Performance for Freezing Mango Puree Wardika; Yudhy Kurniawan; Aa Setiawan; Muchammad Zuhda Alifun Naja
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 24 No. 3 (2024): November
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v24i3.150-159

Abstract

Mangoes are the main commodity in Indramayu Regency, but they are easily damaged after harvesting due to improper mango processing. One solution to overcome this problem is to process mangoes into puree. This process requires freezing technology such as an air blast freezer machine. The evaporator fan functions to prevent blocking of the evaporator fins and distribute cold air so that the room temperature reaches -18˚C. This research aims to determine the effect of variations in evaporator fan rotation on the performance of the air blast freezer system. Data are taken every 10 minutes until the mango puree reaches the set point temperature. Three experiments were conducted with evaporator fan speeds set to low (1800 RPM), medium (2200 RPM), and high (2600 RPM). Based on the tests that have been carried out, the system performance at low fan rotation produces an actual Coefficient of Performance (COP) of 1.9 with an efficiency of 41% and electricity costs of IDR 462,900. Medium fan rotation produces an actual COP of 2.0 with an efficiency of 43% and electricity costs of IDR 469,380. High fan rotation produces an actual COP of 2.1 with an efficiency of 45%. This research shows how variations in fan speed affect the COP, system efficiency, and operational costs, therefore the results of this research contribute to the development of energy efficient and economical cooling technology, especially for tropical-based food preservation applications such as fruit puree mango.
PENGARUH PERUBAHAN TEMPERATUR KABIN TERHADAP KINERJA PADA SISTEM REFRIGERASI FREEZE DRYING wardika wardika; Aa Setiawan; Tri Wulan Fitriyani
Jurnal Poli-Teknologi Vol. 20 No. 3 (2021)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v20i3.4461

Abstract

Tujuan penelitian ini adalah untuk mengetahui kinerja dari mesin freeze drying dengan variasi perubahan temperatur kabin. Metode yang digunakan dalam penelitian ini adalah dengan membandingkan langsung perubahan setpoint pada temperatur kabin -10oC, -15oC dan -20oC terhadap kinerja pada sistem refrigerasi mesin freeze drying dimana dimensi kabin 40cmx40cmx40cm, dengan beban produk irisan buah mangga sebesar 3 kg. Berdasarkan hasil pengolahan data yang dilakukan pada freeze drying didapat kinerja sistem pada COP aktual temperatur kabin -10oC sebesar 2,7, temperatur kabin -15oC sebesar 2,8 dan temperatur kabin -20oC sebesar 2,7. Efisiensi sistem pengeringan beku dengan variasi temperatur masing-masing -10oC, -15oC, dan -20oC sebesar 63%, 62,7% dan 63,1%,Kata kunci : freeze drying, temperatur, Kinerja, Kualitas produk.
Analysis of The Effect Evaporator Fan Rotation Variations on Air Blast Freezer Performance for Freezing Mango Puree Wardika; Yudhy Kurniawan; Aa Setiawan; Muchammad Zuhda Alifun Naja
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 24 No. 3 (2024): November
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v24i3.150-159

Abstract

Mangoes are the main commodity in Indramayu Regency, but they are easily damaged after harvesting due to improper mango processing. One solution to overcome this problem is to process mangoes into puree. This process requires freezing technology such as an air blast freezer machine. The evaporator fan functions to prevent blocking of the evaporator fins and distribute cold air so that the room temperature reaches -18˚C. This research aims to determine the effect of variations in evaporator fan rotation on the performance of the air blast freezer system. Data are taken every 10 minutes until the mango puree reaches the set point temperature. Three experiments were conducted with evaporator fan speeds set to low (1800 RPM), medium (2200 RPM), and high (2600 RPM). Based on the tests that have been carried out, the system performance at low fan rotation produces an actual Coefficient of Performance (COP) of 1.9 with an efficiency of 41% and electricity costs of IDR 462,900. Medium fan rotation produces an actual COP of 2.0 with an efficiency of 43% and electricity costs of IDR 469,380. High fan rotation produces an actual COP of 2.1 with an efficiency of 45%. This research shows how variations in fan speed affect the COP, system efficiency, and operational costs, therefore the results of this research contribute to the development of energy efficient and economical cooling technology, especially for tropical-based food preservation applications such as fruit puree mango.
Co-Authors Ahmad Maulana Kartika Akrom, Akrom Dedi Suwandi Muchammad Zuhda Alifun Naja Tri Wulan Fitriyani Wardika wardika Wardika Wardika Yudhy Kurniawan