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All Journal Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering)
Rahmat Sabani
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Agriculture, Biological Sciences & Forestry Engineering

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Pengeringan Biji Kemiri pada Alat Pengering Tipe Batch Model Tungku Berbasis Bahan Bakar Cangkang Kemiri (Drying of pecan seed using Batch Type dryer with pecan sheel fuel): Drying of Pecan Seed using Batch Type dryer with Pecan Sheel Fuel Murad Murad; Rahmat Sabani; Guyup Mahardhian Dwi Putra
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 3 No 1 (2015): Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Publisher : Fakultas Teknologi Pangan & Agroindustri (Fatepa) Universitas Mataram dan Perhimpunan Teknik Pertanian (PERTETA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (433.822 KB)

Abstract

Generally, this research aimed to study drying characteristic of pecan seed on a Batch type (stove) dryer using pecan shell as fuel. Specifically, this research aimed to determine moisture content reduction, temperature change, drying rate, mass transfer rate, air dryer flow rate, energy requirement, drying efficiency, and drying capacity. This research used experimental method in order to determine drying characteristic of pecan on thin layer method using oven, which was conducted in laboratorium by temperature varied of 40oC, 50oC, 60oC, 70oC, dan 80oC. Thick layer method was conducted by trial mathematical model, i.e. collected data from drying stage on batch stove dryer then analyzed using software based on mathematical model, actual data were also collected from on field experiments. Measurement of pecan geometric characteristic also had been conducted. Result showed that pecan had sphericity number of 0.79. Characteristic curve of thin layer drying obtained from analytical result showed the drying rate was decreasing and correlation between ln MR (%db) with t (hours) on drying temperature of 40 oC to 80 oC showed decreasing moisture content and drying rate towards drying time. General equation for moisture content ratio, MR = exp (-0,0141.T – 0,2583)*t. Graphic of correlation between fuel (kg) and moisture content equilibrium (%) showed decreasing moisture content equilibrium at every fuel addition.
KARAKTERISTIK PENGERINGAN SAWUT MOCAF MENGGUNAKAN ALAT PENGERING TENAGA SURYA TIPE GREENHOUSE Murad Murad; Rahmat Sabani; Hary Kurniawan; Surya Abdul Muttalib; Fakhrul Irfan Khalil
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 7 No 1 (2019): Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Publisher : Fakultas Teknologi Pangan & Agroindustri (Fatepa) Universitas Mataram dan Perhimpunan Teknik Pertanian (PERTETA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (535.637 KB) | DOI: 10.29303/jrpb.v7i1.103

Abstract

Tujuan dari penelitian ini adalah untuk mempelajari karakterisitik Pengeringan Sawut Mocaf menggunakan alat pengering tenaga surya tipe greenhouse. Metodologi yang digunakan dalam penelitian ini adalah metode eksperimental dengan mengukur beberapa parameter, yaitu penurunan berat bahan, kadar air, suhu pengering, suhu lingkungan, kelembaban udara dan laju pengeringan. Alat yang digunakan adalah pengering tenaga surya tipe greenhouse, termokopel CA tipe CC (Cooper Constanta), timbangan digital, timbangan analitis, anemometer, rekam data, luxmeter, stopwatch, termometer batang dan alat tulis. Pengambilan data dilakukan setiap 30 menit. Hasil penelitian menunjukkan karakteristik suhu di dalam ruang pengering ERK yang diukur pada setiap rak dan pada bagian saluran udara keluar melalui exhaust fan. Peningkatan radiasi surya pada umumnya terjadi pada tengah hari yaitu sekitar pukul 12.00 wita sampai pukul 13.00 wita, sedangkan pada saat pemantauan ERK kondisi cuaca cukup berawan sehingga terjadi penurunan radiasi surya. Didapatkan rata-rata temperatur ruang pengering selama pengeringan adalah 39oC, kelembaban udara relatif rata-rata 63%, penurunan berat bahan tiap jam rata-rata 0,95 gram/jam, laju penurunan kadar air rata-rata 55,25% db/jam dari kadar air awal sebesar 67% db sampai kada air mencapai 10%db dan rata-rata Me diperoleh sebesar 14,22%. Dari hasil penelitian pengeringan sawut mocaf yang diperoleh, maka disimpulkan bahwa laju perubahan kadar air MOCAF memiliki karakteristik laju menurun terhadap waktu.
Sistem Otomasi Photovoltaic pada Pembangkit Listrik Tenaga Surya (PLTS) Berbasis Mikrokontroler Arduino skala lab guyup mahardhian dwi putra; Huswatun Ida Lailatun; Rahmat Sabani; Diah Ajeng Setiawati
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 8, No 2 (2019): Juni
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1402.9 KB) | DOI: 10.23960/jtep-l.v8i2.130-138

Abstract

Photovoltaic (PV) merupakan suatu alat yang digunakan untuk mengkonversi sinar surya menjadi energi. Untuk memaksimalkan hasil konversi dari Photovoltaic (PV) perlu dirancang dengan posisi Photovoltaic (PV) yang selalu tegak lurus terhadap arah datangnya matahari. Tujuan dari penelitian ini adalah merancang sistem otomasi serta mengevaluasi kinerja alat pembangkit listrik tenaga surya yang bersifat dinamik. Pada penelitian ini digunakan mikrokontroler sebagai sistem kendali, 4 buah rangkaian LDR, dan 2 buah motor servo sebagai output. Sehingga penelitian ini menghasilkan suatu alat berupa PLTS dinamik yang dapat membantu panel surya selalu bergerak ke arah datangnya sinar matahari..
Pengeringan Lapis Tipis Kopra Putih Menggunakan Oven Pengering: White Copra Thin Layer Method using Drying Oven Murad Murad; Rahmat Sabani; Guyup Mahardhian Dwi Putra
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 3 No 2 (2015): Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Publisher : Fakultas Teknologi Pangan & Agroindustri (Fatepa) Universitas Mataram dan Perhimpunan Teknik Pertanian (PERTETA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (300.823 KB)

Abstract

West Nusa Tenggara has enormous potential as coconut producer in Indonesia. With total area 64.297,10 ha, it can produced coconuts in amount of 49670.93 tons (NTB in Figures, 2010). Most of the coconut was sent to Java Island, whereas some local communities process the coconuts into copra and traditional coconut oil. However, NTB as producer of copra has not been able to produce good quality copra because the traditional process is conducted using simple processing equipment, requires large human power, and long processing time. Due to these limitiation, it is necessary to implement appropriate technology by using shelf-type dryer (tray dryer) tool that utilizes solar energy as a source of thermal energy. Using solar collectors panel, the dryer produce heat higher than using direct drying and the temperature can be controlled. Purpose of this study was to determine characteristics of copra drying processes (temperature, relative humidity, effective drying rate, and relation between effective drying rate and water content) using oven as ideal drying tool, for further application on solar-energy tray-dryer type. Drying was conducted until water content achieved 9%, the observed and calculations data were plotted into graphic then studied descriptively. Calculated variables are reduction in weight material, moisture content, drying air temperature, ambient air temperature, outflow air temperature, material temperature, air humidity, drying efficiency, air flow rate, and intensity of solar radiation. Constant value indicates that the higher the drying air temperature, the more rapid time were needed to decrease moisture content of the material, therefore the obtained general equation for water content ratio becomes MR = exp (-0,0141.T - 0.2583) * t.
Evaluation on Sale Banana (Musa paradisiaca L.) Drying on Hybrid (Solar-Electricity) Tray Dryer Arief Fazlul Rahman; - Sukmawaty; Rahmat Sabani
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 5 No 1 (2017): Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Publisher : Fakultas Teknologi Pangan & Agroindustri (Fatepa) Universitas Mataram dan Perhimpunan Teknik Pertanian (PERTETA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (644.397 KB) | DOI: 10.29303/jrpb.v5i1.48

Abstract

Hybrid (solar-electricity) dryer use additional heat from heater, therefore its efficiency is higher than the solar one. This research aimed to evaluate energy requirement during the drying process and to study efficiency of drying chamber of hybrid (solar-electricity) tray type dryer to drying Sale Banana. Method used was experimental. Material used was banana sliced 0.8 cm and 0.4 cm thickness. Research parameters consist of temperature, moisture content, drying time, drying energy, air flow velocity, and solar intensity. Analyzed data were drying energy produced by the collector, energy to evaporate water in the material, efficiency of drying chamber, and energy to increase material’s temperature. Data analysis conducted using Microsoft excel. This hybrid dryer is suitable for Sale Banana drying with drying chamber’s optimum temperature of 55°C. The result showed that the best drying process using hybrid dryer obtained with material thickness of 0.4 cm, whereas maximum efficiency of solar dryer was 42.21%. Keywords: heater, collector, drying, banana ABSTRAK Pada alat pengering hybrid (surya-listrik) digunakan panas tambahan dari heater, sehingga efisiensi hybrid lebih tinggi dari full surya. Penelitian ini bertujuan untuk mengevaluasi kebutuhan energi selama pengeringan serta mempelajari efisiensi ruang pengering alat pengering hybrid (surya-listrik) tipe rak untuk pengeringan pisang sale. Metode yang digunakan adalah eksperimental. Bahan yang digunakan dalam penelitian ini adalah pisang hijau yang diiris tipis 0,8 cm dan 0,4 cm. Parameter penelitian terdiri dari suhu, kadar air, lama pengeringan, energi pengeringan, kecepatan aliran udara dan intensitas cahaya matahari. Data yang dianalisa pada penelitian ini adalah energi pengeringan yang dihasilkan oleh kolektor, energi untuk menguapkan air bahan, efisiensi ruang pengering, dan energi untuk menaikan suhu bahan. Analisis data dilakukan menggunakan microsoft excel. Alat pengering hybrid (surya-listrik) tipe rak ini cocok untuk pengeringan pisang sale dengan suhu optimal pada ruang pengering adalah 55oC pada pengeringan hybrid. Hasil penelitian menunjukan proses pengeringan pisang sale terbaik adalah dengan ketebalan bahan 0,4 cm menggunakan hybrid dengan efisiensi ruang pengering maksimal 55,20% dengan kadar air 35,5% sementara efisiensi maksimal pengeringan surya sebesar 42,21%. Kata kunci: heater, kolektor, pengeringan, pisang
Co-Authors - Sukmawaty Arief Fazlul Rahman Diah Ajeng Setiawati Fakhrul Irfan Khalil Guyup Mahardhian Dwi Putra Guyup Mahardhian Dwi Putra Hary Kurniawan Huswatun Ida Lailatun Murad Murad Murad Murad Surya Abdul Muttalib