Sukmaji Indro Cahyono, Sukmaji Indro
Industrial Engineering Departement Diponegoro University Jl. Prof. Sudarto, SH Tembalang Semarang 50239 Telp. 0247460052

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PENENTUAN KONSEP PERANCANGAN ALAT PENGERING SIMPLISIA JAHE MENGGUNAKAN SUMBER PANAS SINAR MATAHARI DENGAN BACKUP PANAS KOMPOR BIOMASSA Agassi, Ereika Ari; Damayanti, Retno Wulan; Cahyono, Sukmaji Indro
J@ti Undip : Jurnal Teknik Industri Volume 10, No. 3, September 2015
Publisher : Departemen Teknik Industri, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (545.592 KB) | DOI: 10.12777/jati.10.3.179-186

Abstract

Proses pengeringan rimpang jahe yang dilakukan petani Biofarmaka Karanganyar untuk memproduksi simplisia,  selama ini menggunakan sumber panas sinar matahari. Sinar matahari merupakan sumber energi yang terdapat bebas di alam namun tidak dapat dikontrol. Proses produksi simplisia terhambat apabila tidak terdapat panas matahari yaitu apabila cuaca mendung atau hujan. Hambatan proses produksi simplisia menjadi faktor yang penting mengingat daya tahan jahe segar yang rendah. Untuk itu, diperlukan adanya alternatif sumber energi panas yang murah dan dapat dikontrol untuk memproduksi simplisia jika sumber energi panas matahari tidak dapat digunakan. Penelitian ini bertujuan untuk menyusun konsep perancangan alat pengering simplisia jahe menggunakan sumber panas sinar matahari dengan backup panas kompor biomassa. Tahapan perancangan terdiri dari identifikasi kebutuhan pengguna, penyusunan spesifikasi produk, pengembangan konsep produk, dan pemilihan konsep produk. Penelitian ini menghasilkan 36 konsep produk untuk alat pengering simplisia jahe menggunakan sumber panas sinar matahari.   Kata kunci : alat pengering; simplisia; energi matahari; kompor biomassa   Abstract   The ginger drying process used by Biofarmaka farmers of Karanganyar to produce simplisia, used heat source from solar energy of the sunlight. Sunlight is a free source of energy that can be obtained in the universe but can not be controlled. Production of simplisia can be stopped or obstructed if there is no sunlight that gives solar energy for the drying process (cloudy or rainy). This obstacle of production process of simplisia becomes an important matter considering the low durability of fresh ingredients (ginger). This requires the presence of an additional source of heat energy which is cheap and can be controlled to produce simplisia if the heat source from solar energy of the sunlight can not be used. This study aims to construct concept of design solar dryer with a biomass stove for heat backup to produce ginger simplisia. The step of design are identification of user requirements, construction of product specifications, product concept development, and product concept selection. This study resulted in 36 product concept of the ginger solar dryer. Keywords : dryer; simplisia; solar energy; biomass stove
Pembuatan dan pengujian turbin propeller dalam pengembangan teknologi pembangkit listrik tenaga air piko hidro (PLTA-PH) dengan variasi debit aliran Dewanto, Henanto Pandu; Himawanto, Dwi Aries; Cahyono, Sukmaji Indro
Jurnal Teknik Mesin Indonesia Vol 12 No 2 (2017): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1083.684 KB) | DOI: 10.36289/jtmi.v12i2.72

Abstract

Hydroelectric power plants (hydropower) with a power generated capacity of less than 5 kW called "Pico Hydro" (hydropower-PH). Pico Hydro is one of the renewable energy sources that are environmentally friendly. In this study aims to: (1) the manufacture hydropower plants Pico Hydro energy-efficient, renewable and environmentally friendly; (2) determine the efficiency of the turbine with the testing of flow variation; (3) determine the efficiency of generator. Designing and making portable water turbines are easily in the manufacture, operation, and maintenance and has a high efficiency and effectiveness that can use the method of reverse engineering. The production process is performed to create a turbine by the lathe and welding processes. While the materials used are mild steel. Results of this study were found that: (1) the manufacturing process of hydropower plants Pico Hydro can be performed easily by the public; (2) the type of turbine used in hydropower-PH testing is a propeller turbine with 4 blades; (3) flow measurement with V-Notch method showed the following actual debit are 5.38 x10-3 (m3/s), 6.62 x10-3 (m3/s), 7.69 x10-3 (m3/s) and 8.84 x10-3 (m3/s. Turbine efficiency is 3.59 %, 4.26 %, 5.66 % and 7.54 %. The efficiency of the generator has a value of 39.31 %, 40.51 %, 32.55 % and 30.45 %.
Redesign runner turbin pembangkit listrik tenaga pico hydro dengan metode reverse engineering melalui pendekatan teoritis Zuhud, Abdillah; Cahyono, Sukmaji Indro; Tjahyana, Dominikus Danardono Dwi Prija
Jurnal Teknik Mesin Indonesia Vol 11 No 2 (2016): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (693.216 KB) | DOI: 10.36289/jtmi.v11i2.54

Abstract

Daerah tertinggal adalah daerah yang terisolasi secara geografis yang memiliki aksesibilitas sangat rendah. Sebagian besar wilayahnya memiliki tingkat populasi dan kelistrikan yang rendah karena aksesibilitasnya sangat jauh dari jaringan tenaga nasional. Masalah listrik di daerah tertinggal bisa diatasi dengan membangun pembangkit listrik tenaga piko hidro. Salah satu komponen penting piko hidro adalah runner turbin. Berdasarkan proses perancangan teoritis yang mengacu pada laju alir variabel tetap 25 l/s, head 2 m dan jumlah putaran turbin 1500 rpm maka diperoleh runner diameter luar turbin propeller adalah 0,103m, diameter hub 0,515m, jumlah blade adalah 4 dengan profil blade datar, efisiensi hidrolik 76% dan ditargetkan untuk meningkatkan tenaga listrik 490 Watt.
Pengaruh kecepatan gerak torch pemanas pada proses automatic flame hardening terhadap nilai kekerasan dan kekuatan tarik baja karbon medium Purwanto, Andi; Triyono, Teguh; Cahyono, Sukmaji Indro
Mekanika: Majalah Ilmiah Mekanika Vol 17, No 2 (2018): MEKANIKA: Majalah Ilmiah Mekanika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mekanika.v17i2.35127

Abstract

Steel material was widely used and obtained in the industry and automotive application. The hardness of the surface area and the ductile of the core were produced by using heat treatment, in this case, automatic flame hardening method was used. The heat treatment process was done in order to increase the surface temperature by using a carburizing flame and then the cooling process by using water cooling medium continously followed. The aim of this research was to identify the effect the heating torch velocity on the surface hardness and the tensile strength of the medium carbon steel using the automatic flame hardening process. Some variations were used in this research were heating torch velocities at 10 mm/min, 20 mm/min, 30 mm/min, and 40 mm/min. The results shows that the heating torch velocity at speed 10 mm/min was the most optimal parameter. The maximum hardness of the surface area is reached 398.9 VHN, while the highest tensile strength was 647.3 MPa and the perlit-ferrit phase was also formed. By these results, the hard properties on the surface area and the ductile properties in the middle area of the specimen could be obtained.