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All Journal REKAYASA agriTECH Journal Of Chemical Process Engineering
Rahmat, Anni
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Electrical & Electronics Engineering Energy Engineering Physics

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Analisa Tegangan Panas Housing Batang Kendali Reaktor Nuklir Dalam Batas Desain SA403X Rahmat, Anni; Kurniati, Yuni; Muslimu, Fahmi Alfa
Journal of Chemical Process Engineering Vol. 7 No. 1 (2022): Journal of Chemical Process Engineering
Publisher : Fakultas Teknologi Industri - Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jcpe.v7i1.797

Abstract

Batang kendali reaktor Nuklir adalah satu komponen yang digunakan untuk mengendalikan populasi netron yang beredar dalam teras reaktor nuklir. Untuk memenuhi desain PLTN tipe PWR perlu dibuat sebuah prototype housing batang kendali. Oleh karena itu dalam rangka pembuatan prototype housing batang kendali di perlukan sebuah pradesain yaitu berupa pemodelan integritas housing batang kendali dengan mmenggunakan metode element hingga. Simulasi perpindahan panas dan mekanik pada housing batang kendali reaktor nuklir tipe PWR telah dilakukan menggunakan metode elemen hingga dengan bantuan perangkat lunak Ansys. Simulasi ini dilakukan untuk mengetahui distribusi temperatur selama operasi dan distribusi tegangan vonmisses pada kondisi tegangan panas yang terjadi pada housing batang kendali reaktor dengan tujuan untuk mengetahui integritas strukturnya. Simulasi dilakukan dengan kondisi temperatur operasi 280 ºC dan tekanan 15 MPa dan adanya faktor konveksi pada temperatur 60 ºC serta pada kondisi unsteady state. Dalam simulasi di dapatkan hasil bahwa distribusi temperatur pada housing batang kendali berada pada range 170 ºC – 280 ºC dengan distribusi tegangan Vonmises pada tegangan panas paling rendah adalah 2 MPa dan tegangan Vonmises pada tegangan panas tertinggi sebesar 217 MPa. Dengan menggunakan teori kegagalan tegangan luluh dan distorsi energi maka tegangan panas (dalan vonmises) yang ada pada housing batang kendali masih dalam batas aman karena tegangan yang terjadi masih di bawah tegangan luluh dari bahan SA403X.
Sintesis Biodiesel dari Minyak Jelantah menggunakan Katalis Heterogen Berbasis Kalsium Oksida dari Limbah Cangkang Kerang Bulu (Anadara antiquata) Rahmat, Anni; Kurniati, Yuni; Rahmah Hidayah, Laila; Nafisah, Salwa
Rekayasa Vol 18, No 2: Agustus, 2025
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v18i2.30015

Abstract

The depletion of non-renewable fossil energy reserves is the main reason for this research to develop renewable energy as a substitute for diesel fuel. One of the alternatives studied is the production of biodiesel from used cooking oil. This study aims to produce environmentally friendly biodiesel, reduce dependence on fossil energy, and utilize used cooking oil waste to increase its value for society. This research employs esterification and transesterification methods. The variations in the catalyst used are 2 grams, 4 grams, and 6 grams. Meanwhile, the oil-to-methanol ratio is applied at 1:1.5, 1:3, and 1:6. The results of this study indicate that the free fatty acid content of used cooking oil must be at least 1% to proceed with the transesterification process. Calcium oxide (CaO) catalyst derived from Anadara antiquata shell waste, used as a heterogeneous base catalyst, contains 96.51% CaO. The best biodiesel yield was obtained at a molar ratio of 1:1.5 with 6 grams of catalyst, a molar ratio of 1:6 with 2 grams of catalyst, and a molar ratio of 1:6 with 4 grams of catalyst. All three samples met the biodiesel test standards according to the National Standard (SNI. This study tested the flame on biodiesel. During combustion, the flame color is produced by rapid oxidation. The color indicates the amount of energy produced. Blue flames emit more heat than red flames. Red flames are present below 1000°C. Blue flames are present at temperatures below 2000°C. The combustion of samples containing biodiesel produced a blue flame.
Chemical and Sensory Characteristics of Boranan Instant Chili Sauce with Different Coconut Milk Powder Concentration, Rice Flour, and Dry Grated Coconut Mardhiyyah, Yunita; Puspitasari, Elsa; Rahmat, Anni
agriTECH Vol 44, No 1 (2024)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.78470

Abstract

Sego Boranan is a special food from Lamongan, East Java. They are cooked rice with various dishes flavored with a special chili sauce called Boranan sauce. Sauce consists of many ingredients with complex process production. Therefore, the study aimed to make Boranan sauce formulation coming from dry-based ingredients. Conversion of Boranan sauce recipe from fresh ingredients into powder preparations was carried out using water content data. Coconut milk powder, rice flour, and dry-grated coconut concentration was optimized within 9 sample formulations. All the samples were observed in chemical and sensory characteristics. The parameters observed included pH, proximate test, and preference test (color, aroma, texture, spices taste, and overall). The best formulas were compared with freshly made Boranan sauce. The pH and water content were not influenced significantly, in the other hand, the others (color, fat content, texture, aroma, taste, and overall sensory parameters) showed significant differences. Based on the preference test, high preference with a score of 7.91 acceptance value from a 10 scale was gained by both K2S1R1 and K1S2R1 samples. Although the panelist gave a “like” score, both samples showed significant sensory acceptance and proximate value differences from fresh-made Boranan sauce. The selected formula K2S1R1 was made from 4.5% dry grated coconut, 2.25% coconut milk powder, and 2.25% rice flour. The Rehydrated K2S1R1 sample had 70.7% (wet basis) water content, 1.4% ash content, 17.5% absorbent content, 0.5% protein content, and 8.8% carbohydrate content.
Co-Authors Fahmi Alfa Muslimu Kurniati, Yuni Mardhiyyah, Yunita Nafisah, Salwa Puspitasari, Elsa Rahmah Hidayah, Laila