Dedy Eko Rahmanto
Program Studi Teknik Energi Terbarukan, Politeknik Negeri Jember

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TEKNOEKONOMI ALAT PEMURNI AIR MENGGUNAKAN ENERGI LISTRIK TERBUANG DI PLTMH GUNUNG SAWUR 1 LUMAJANG Dedy Eko Rahmanto; Valency Femintasari
JURNAL AGROTEKNOLOGI Vol 13 No 01 (2019)
Publisher : Faculty of Agricultural Technology, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (423.315 KB) | DOI: 10.19184/j-agt.v13i01.11114

Abstract

Water purification is carried out to separate water from minerals in it. One process of water purification is distillation. Water destilator require heat that can be obtained from electricity. The Gunung Sawur 1 Microhydro produces electricity for the surrounding society. But, not all electricity produced by microhydro was used. Excess of electricity from microhydro discharged into dummy load for balancing. The potency of wasted electrical energy can be used for water distillation. The purpose of this research were to make a plan about water purification using wasted electrical energy from microhydro Gunung Sawur 1 and investigate its economic feasibility. This research begun with a survey of potency of wasted electrical energy in microhydro Gunung Sawur 1. The potency of waste electrical energy as the basic to calculate the production capacity of water distillation column. Feasibility study was carried out by using NPV and B/C ratio. The result showed that the potency of wasted electrical energy in microhydro of Gunung Sawur 1 up to 66 kwh/day. The capacity of maximum power of planned distillation column was equal to the maximum power of microhydro dummy load. The production capacity of pure water was about 66 liters a day. The production of water purifier was feasible to do based on NPV value of IDR 30,121,094 and the B/C ratio value of 1.51. Keywords: distillation, microhydro, wasted energy
INVESTIGASI LISTRIK MIKROHIDRO DI PERKEBUNAN GUNUNG PASANG KECAMATAN PANTI, JEMBER Dedy Eko Rahmanto; Michael Joko Wibowo; Ahmad Fahriannur; Abdul Ghofur
JURNAL AGROTEKNOLOGI Vol 16 No 01 (2022)
Publisher : Faculty of Agricultural Technology, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/j-agt.v16i01.28021

Abstract

Gunung Pasang plantation has a micro-hydro power plant which is used for electricity needs of the factory and the surrounding residents. The micro-hydro power plant is not equipped with an electronic load controller system. The micro-hydro electric voltage can change at any time if there are some changes in consumer load. Micro-hydro electricity investigation is needed to determine the feasibility of the micro-hydro electricity. The investigation was carried out by recording the micro-hydro electricity data which is produced in Gunung Pasang Plantation. Data recording is done by installing a power logger while the micro-hydro turbine operates. The results of the investigation showed that the electric voltage which is generated by Gunung Pasang micro-hydro was fluctuating from less than 100 volts to more than 245 volts with a voltage value that deviated a lot from the 1995 SPLN rule. The average daily voltage which was generated was around 150.34 to 172.18 volts with a standard deviation of 22.11 to 30.67 volts. Micro-hydro operators tried to regulate the work of micro-hydro turbines at all times so the generated voltage could reach the stability. This unstable electrical condition was actually not feasible and had possibility to cause damage to consumer’s electrical equipment. It was necessary to have an electronic load controller system so the outcome of the micro-hydro voltage could be stable and safe. Keywords: investigation, micro-hydro, voltage
Pemanfaatan Daun Biduri (Calotropis Gigantea) Sebagai Perekat Pada Pembuatan Briket Serbuk Gergaji Kayu Bayur (Pterospermum Javanicum) Dedy Eko Rahmanto; Esma Hadi Fitroni; Bayu Rudiyanto
Rona Teknik Pertanian Vol 13, No 1 (2020): Volume 13, No. 1, April 2020
Publisher : Department of Agricultural Engineering, Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17969/rtp.v13i1.16092

Abstract

Abstrak. Kayu bayur banyak digunakan untuk pembuatan bahan baku furnitur yang menghasilkan limbah serbuk gergaji. Kayu bayur memiliki nilai kalor sebesar 4.452,01 kal/gr, kadar abu 1,04% dan kadar air 19,29%. Serbuk gergaji kayu bayur ini sangat berpotensi digunakan sebagai bahan pembuatan briket dengan penambahan perekat.  Bahan yang bisa digunakan sebagai pengganti perekat tepung tapioka adalah daun tanaman biduri. Tanaman biduri memiliki kandungan kimia seperti selulosa, pentosan sebagai hemiselulosa, lignin, abu, tanin 9,1mg/g dan pektin 55%. Pembuatan briket dengan perekat daun biduri bertujuan untuk mengetahui bagaimana pengaruh berbagai variasi perekat, dan bagaimana karakteristik briket yang dihasilkan. Penelitian yang telah dilakukan mendapatkan hasil bahwa dari variasi kadar perekat 35%, 40%, dan 45% pada briket terbaik yaitu pada variasi ke BB3 diaman 55% (30 g) arang serbuk gergaji kayu bayur dengan 45% (24,5 g) perekat daun biduri dan karakteristiknya mencapai nilai SNI briket No.1/6235/2000. Pada perlakuan ini nilai yang diperoleh yaitu untuk kadar air 1,8%, kadar abu 7,42%, densitas 0,4235 g/cm3, nilai kalor 5.069,589 kal/g, dan uji tekan 4,0538 kg/cm2.The Use of Leaves Biduri (Calotropis Gigantea) as Adhesives to Making Briquettes Sawdust Wood Bayur (Pterospermum Javanicum)Abstract. Bayur wood is widely used for manufacturing furniture raw materials that produce sawdust waste. Bayur wood has a calorific value of 4,452.01 cal/g, ash content of 1.04% and a moisture content of 19.29%. This bayur wood sawdust is very potential to be used as a briquette making material by adding adhesive to the briquetting process. Material that can be used as a substitute for tapioca flour adhesive is the leaves of the biduri plant. Betell plants have chemical properties like cellulose, pentatosan as hemicellulose, lignin, as, tannin 9.1 mg/g and pectin 55%. The making of briquettes with biduri leaf adhesive aims to find out how the influence of various variation of the adhesive, and how the characteristics of the briquettes produced. The research that has been carried out shows that the variation of 35%, 40%, and 45% adhesive content in the best briquettes is in the variation to BB3 where 55% (30 g) chacrcoal of sawdust with 45% (24.5 g) of adhesive biduri leaves and their characteristics reach to SNI briquettes No.1/6235/2000. In this treatment the values obtained are for water content of 1.8%, ash content of 7.42%, density 0.4235 g/cm3, calorific value of 5,069.589 cal/g, and pressure test of 4.0538 kg/cm2.