cover
Contact Name
Muhammad Yusuf
Contact Email
snast@gmail.com
Phone
+6282282677899
Journal Mail Official
snast@akprind.ac.id
Editorial Address
Institut Sains & Teknologi AKPRIND Jl. Kalisahak 28 Kompleks Balapan Yogyakarta 55222
Location
Kota yogyakarta,
Daerah istimewa yogyakarta
INDONESIA
Prosiding SNAST
ISSN : 1979911X     EISSN : -     DOI : -
SNAST merupakan seminar nasional rutin yang diselenggarakan oleh IST AKPRIND Yogyakarta, sejak tahun 2008 dan diselenggarakan setiap 2 tahun sekali
Articles 200 Documents
PIROLISIS LIMBAH KULIT NANGKA MENJADI ARANG AKTIF DAN ASAP CAIR DENGAN AKTIVATOR LARUTAN NATRIUM KHLORIDA Ani Purwanti; Achmad Thesa Widhaswara; Endri Santoso
PROSIDING SNAST Prosiding SNAST 2018
Publisher : IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Jackfruit (Artocarpu sheterophyllus) is a fruit plant that belongs to a group of tropical plants. During this time, jackfruit harvested for its ripe fruit meat, often used fresh or processed into various types of food. In general, jackfruit skin is only thrown away and underutilized. As jackfruit skin biomass has high organic composition and charcoal content, it has the potential as raw material for making activated charcoal and liquid smoke with pyrolysis process. Activated charcoal production was carried out by pyrolysis process, which is charcoal without contact with air. Jackfruit skin waste that had been cut with a size of 1 cm2 was dried first. After drying process, jackfruit skin waste was analyzed for water content and ash content then the pyrolysis process can be done. The pyrolysis process was carried out using temperature and time variations. The charcoal produced was soaked in the activator of NaCl solution with variations in concentration and soaking time. Based on the research that has been done with 150 grams of raw material, the best results were obtained at the process of pyrolysis temperature of 570ºC and pyrolysis time of 60 minutes, with a concentration of 20% NaCl solution and 34 hours of soaking time. From this process, 53 mL of liquid smoke was produced and the charcoal activity obtained was 331.105 mg/g. This charcoal activity is still below the standard, which is 750 mg/g (SNI 06-3730-1995).
EKSTRAKSI TANIN DARI DAUN JAMBU BIJI SEBAGAI BAHAN PENYAMAK NABATI Sumarni -; Helen Firda Tomanda; Yunita Safitri A. Lakuba
PROSIDING SNAST Prosiding SNAST 2018
Publisher : IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In Indonesia, there are still many tannery factories that use tanneries which have the potentialas environmental pollutant. One type of tanneries used is chrome (Cr). The use of this material produces very high levels of waste. Therefore, the leather tanning producers switch to using more environmentally friendly materials, such astannin. Tannin can be used as natural tanneries that are more environmentally friendly. Generally, tannin is found in plants such as leaves, fruit peels, stems, and bark. One of materials that has high tannin content is guava leaves. This research aims to determine the method ofextracting tannin from guava leaves with extraction process. The extraction process was carried out using 40 grams of red guava leaves with 96 mL ethanol solvent as much as 100 mL and a stirring speed of 250 rpm. This processes were carried out using variation in extraction time, extraction temperature, solvent volume, and stirring speed. The analysis includes analysis of water content, analysis of tannin content in raw materials, and analysis of extracted tannin. From the research that has been done, obtained the results of tannin content of raw materials were 4.42 grams or 10.5%. The best process conditions were obtained at 150 minutes, temperature of 65oC, and stirring speed of 400 rpm with the extracted tannin percentage of 85.44% or weighing 3.78 grams.
PENGARUH STAGGER ANGLE TERHADAP PRESSURE RATIO KOMPRESOR AKSIAL MULTISTAGE Akhsan Yusufi; Setyo Nugroho; Achmad Bahrul Ulum
PROSIDING SNAST Prosiding SNAST 2018
Publisher : IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Axial compressors are one of the most widely used fluid flow impeller engines in gas turbines and turbo jet engines. The compressor rotates at high speed, adding energy to the airflow while at the same time compressing into a smaller space. To obtain a better pressure ratio, modify the angle on the rotor blade, in order to reduce aeerodynamic losses such as stalls and increase the pressure ratio. The variations used are -5˚ and + 5˚. Both variations will be compared to get the best results to reduce the occurrence of stall and increase pressure ratio. Laying variations on the first rotor. Material type for blade compressor using Aluminum alloy with die casting making technique. In axial compressor testing required several measuring devices, such as anemometer, manometer, temperature sensor, and proximity sensor. This axial compressor will be rotated up to a top speed of 1100 rpm using a Fuel motor. The results obtained as a whole indicate that the variation of stagger angle is very influential on pressure ratio. This occurs in the variation of stagger angle -5˚ at 500,650 rpm, and 950 with a pressure value of 1.00208, 1.00317, and 1.008 pa. This causes the effect of rpm to ΔPlocal bias increases 8% to 16%. From the research results obtained the best angle in reducing aerodynamic losses and increase pressure ratio that is on angle variations -5˚.
PENGARUH MODIFIKASI DOVETAIL-CROWN TIP PADA ROTOR TERHADAP PRESSURE RATIO KOMPRESOR AKSIAL MULTISTAGE Ibnu Samsul Kurniawan; Setyo Nugroho; Prima Dewi Permatasari
PROSIDING SNAST Prosiding SNAST 2018
Publisher : IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Compressors are one type of turbomachinery to add energy of fluid and move fluid from one location to another. Axial compressor on gas turbine used to compress fluid to get the required pressure increase. Multiple-stage axial compressor have a high level performance, that is 70-80%. Compressor performance is related with energy utilization, the greater the energy loss, the lower the compressor performance. The biggest energy loss is caused by aerodynamic loss, stall phenomenon and tip clearance. Gap between casing and rotor can cause secondary flow, leakage flow and boundary scrapping. These three streams can cause energy losses and affect the pressure ratio produced by the compressor. One way to get better performance with add dovetail-crown tip modification on the rotor, with the aim of reducing energy loss on the tip clearance. Modification of dovetail-crown tip on the rotor that is, the airfoil profile extended 75% of tip clearance compressor, then given a square gap along the chord with a/b ratio of 1:3. The axial compressors that become the testing system have parameters: 0.5 degree reaction, three stage, stagger angle 24 °, NACA 65- (19) -10 blade profile. Based on the results, the addition of a modified tip blade in the form of a dovetail-crown tip can reduce energy losses by presenting an average reduction in energy losses of 11.9%. The results also show that the use of dovetail-crown tip modification can increase the compressor pressure ratio with an average percentage increase of 0.0219%.
ANALISA TEMPERATUR YANG TIMBUL PADA SPROKET DAN RANTAI SEPEDA MOTOR SAAT SEDANG DIJALANKAN YANG BERPENGARUH TERHADAP KEMULURAN RANTAI DENGAN MENGGUNAKAN PROGRAM NISA HEAT Riki Candra Putra; Joko Hardono
PROSIDING SNAST Prosiding SNAST 2018
Publisher : IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Chains and sprocket are transmission systems that are used to transmit power and rotation from the drive to the driven shaft. Motorcycle chains and sprocket are generally damaged due to lack of proper and correct maintenance and maintenance. The damage that occurs in general is caused by friction between the sprocket teeth and the chain that moves each other quickly, from the friction that occurs it produces heat in the metal material of the chain and sprocket. The heat generated greatly affects the performance of the material. Therefore, it is necessary to know the heat transfer analysis that occurs in friction between the chain and sprocket. Research was carried out in various places and outdoors or on the highway, when motorbikes drove at normal speed and then stopped to make temperature measurements on the surface of the gears and sprocket. Weather conditions at the time of measurement are carried out when the weather is sunny or not rainy, the aim is to facilitate measurement if it is dry or not wet due to water and analyzed using NISA-HEAT software to see temperature distribution at certain speeds and ambient temperatures certain, therefore this experiment can represent the wheel rotation of a motorcycle in conditions when it is running and when the speed of a motorcycle is changing. The heat obtained at the hottest temperature conditions of 38oC obtained by the temperature of the sprocket is 52oC at a speed of 60 km / h with a large heat transfer of 0.543 Watt. And with the increasing speed of the motorcycle to 70 km / h, the temperature of the sprocket becomes 57oC with the same ambient temperature.
ANALISIS PENGENDALIAN KUALITAS PRODUK KERTAS DENGAN MENGGUNAKAN METODE SIX SIGMA, FTA DAN FMEA UNTUK USULAN PERBAIKAN KUALITAS PRODUKSI Winarni -; Joko Susetyo; Sariyono _
PROSIDING SNAST Prosiding SNAST 2018
Publisher : IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

PT Papertech Indonesia unit II Magelang is a company that produces recycled paper with mixed raw materials (short fiber paper such as magazines, newspapers, books), occ (long fiber paper such as dos, cartons) and other additives such as tapioca starch. Its flagship product is chip board. This paper product is often produced every day and always found defect every month resulting in decreased quality (downgrade).Thereforeit is necessary to control product quality. The Six Sigma method is used to measure Sigma Quality Level (SQL) based on the Disabled per Million Opportunity (DPMO) value of chip board production process. Failed Tree Analysis Method is used for defective product defects, the result is used as a barrier to make improvements. The proposed improvements are prioritized based on the largest Risk Risk Number (RPN) in the Failure and Securities Analysis (FMEA) approach and corrective actions with 5W + 1H tools. Based on the calculation, the average value of Defect per Milion Opportunity (DPMO) is 8,950, so the average Sigma Quality Level (SQL) of PT Papertech Indonesia unit II Magelang is 3.87. Fault Tree Analysis shows 13 failure modes that cause the product defect. There are 9 failure modes that prioritize improvement based on Risk Priority Number (RPN) value: hot room temperature (294 RPN), fatigue (280 RPN), decreased concentration (210 RPN), less accuracy (210 RPN), dirty dryer (210 RPN), trim goes into cutter (210 RPN), noise (180RPN), less inspection (180 RPN), moist paper (168 RPN).
STUDI NUMERIK PENGARUH PENAMBAHAN GUIDE VANES TERHADAP KINERJA CIRCULAR ELBOW Imam Santoso; Setyo Nugroho; Prima Dewi Permatasari
PROSIDING SNAST Prosiding SNAST 2018
Publisher : IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The use of curved pipes will cause a pressure drop that is greater than the straight pipe of the same length. This is because there is a large pressure difference between the outer wall and the inner wall, eventually blocking the flow of fluid in the pipe. Pressure drop (pressure drop) of this flow is caused by friction (friction loss), separation (separation) and secondary flow (secondary flow). One method that can reduce pressure on the 900 elbow with the guide vane. The test module is in the form of a circular elbow 900 with a radius ratio (rc / Dh) = 1.2217 without a guide vane and uses a variety of number of guide vane. Numerical research uses computational fluid dynamics (CFD) method using computational software ANSYS FLUENT 14.5 with ReDolds number 9.8x104 ReDh. Fluid in the form of air with an inlet speed is uniform. From the results of this study obtained pressure drop, contour preset coefficient, velocity vector and pathline to determine the fluid flow phenomenon passing through the circular elbow with the addition of one guide vane, two guide vane, three guide vane, and without guide vane as a reference the phenomenon of the addition of guide vanes . The addition of guide vane gives the effect of increasing pressure drop. The biggest increase in pressure drop was the addition of three guide vane with an increase of 45.54% compared to the reference. The magnitude of this pressure drop occurs due to an increase in fluid friction with guide vanes and vortices which block the mainflow in circular elbow.
RANCANG BANGUN ALAT PENGENDALI LAMPU JARAK JAUH BERBASIS RADIO FREKUENSI 315MHZ FS1000A Aufa Maulida Fitrianingrum; Mikrajuddin Abdullah
PROSIDING SNAST Prosiding SNAST 2018
Publisher : IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Control the switching of lamp is one of remote control application that can very useful for household appliance. The main purpose of this research was to make a device that can lighten the human workload. This research developed a remote control using radio frequency technology. This device principle used the principle of wireless system, which the lamp can be turned on or off without using cables. The remote control constructed by radio frequency 315MHz FS1000A module as transmitter and receiver, HT12E and HT12D for connecting the module, and antenna for transferring the signal. To obtain the aim of this research the transmitter will send a signal to the receiver when the switch is pressed. The receiver will receive and process the signal to turn on or off the lamp. Based on the experimental results, this designed device was tested and it was capable to turn on the lights with a range of about 25 meters without obstacles and about 10 meters if there was obstacles. The utilization of this remote control is expected to be developed further and it can be used as an alternative to make human activity more effectively and efficiently, not only for lamp but also for other appliance.
PENGENDALIAN PERSEDIAAN BAHAN BAKU KAYU MENGGUNAKAN PENDEKATAN LOT SIZING Marcelly Widya Wardana; Sulastri _; Ezti Ika Dinari
PROSIDING SNAST Prosiding SNAST 2018
Publisher : IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Persediaan merupakan salah satu aset yang mahal didalam suatu perusahaan, bahkan hingga mencapai 50% dari total aset perusahaan.CV Suyono Jaya merupakan usaha yang bergerak dibidang produksi dan penjualan meuble keperluan rumah tangga. Produk yang dihasilkan adalah produk lemari pakaian. Seringkali terlihat menumpuknya bahan baku kayu pada areal penyimpanan bahan baku.yang mengakibatkan timbulnya biaya penyimpanan yang tinggi. Diharapkan dengan perencanaan dan pengendalian persediaan yang baik diharapkanbisa mengurangi biaya persediaan. Penelitian ini menggunakan lot sizing dalam metode Material Requirement Planning untuk pengendalian dan perencanaan persediaan. Berdasarkan perhitungan yang dilakukan, diperoleh kebutuhan rata-rata per periode adalah 30.000.000 Cm3 : 12 = 2.500.000 Cm3 = 2,5 m3, dari berbagai metode yang digunakan, maka biaya persediaan yang paling terkecil adalah metode Part Period Balancing (PPB), Period Order Quantity (POQ) dan Least Unit Cost (LUC) yaitu dengan total biaya persediaan bahan baku yang digunakan sebesar Rp.810.000,00. Penerapkan metode lot sizing memberikan penghematan sebanyak 45% dari biaya pemesanan dan biaya persediaan yang harus dikeluarkan.
ANALISIS TINGKAT KEBISINGAN PADA KANTOR UNTUK MEREDUKSI PAPARAN BISING DENGAN PENDEKATAN PERANCANGAN TATA LETAK FASILITAS Joko Susetyo; Titin Isna Oesman; Eko Setia S
PROSIDING SNAST Prosiding SNAST 2018
Publisher : IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Kalor Makmur adalah Industri yang memproduksi berbagai keperluan pabrik yang proses produksinya menggunakan berbagai alat bantu kerja antara lain: mesin genset, mesin bubut, mesin gerinda, mesin las, mesin gerinda cutting, mesin bor, dan alat pembuat heating yang menyala selama produksi berlangsung sehingga menimbulkan kebisingan. Posisi kantor yang bersebelahan dengan lokasi produksi menjadi faktor utama kebisingan. Dari hasil studi pendahuluan diperoleh nilai kebisingan sebelum re-layout 89,61 dBA di ruang kantor yang mempengaruhi tingkat kenyamanan saat bekerja. Pada penelitian ini diidentifikasi paparan bising didalam kantor melebihi nilai ambang batas (NAB) dari yang ditentukan pemerintah. Kemudian kebisingan direduksi menggunakan Perancangan Tata Letak Fasilitas dengan urutan Activity relationship chart (ARC), Worksheet, Activity Template Block Diagram (ATBD), Activity Relationship Diagram (ARD), Area Allocation Diagram (AAD). Berdasarkan hasil analisis diperoleh Layout baru kemudian dihitung rata-rata tingkat kebisingan di dalam kantor menggunakan SPSS16 One Sampet T Test dan membandingkan menggunakan Paired Sampel T Test. Dari layout baru dihitug rata-rata kebisingan 75,70 dBA hal ini menunjukkan terjadi menurun tingkat kebisingan dibandingkan dengan Layout sebelumnya.

Page 1 of 20 | Total Record : 200