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JURNAL TEKNOLOGI TECHNOSCIENTIA
Published by Institut Teknologi Nasional Yogyakarta
ISSN : 19798415     EISSN : 27148025     DOI : https://doi.org/10.34151/technoscientia.v8i2.161
Core Subject : Science, Engineering,
Earth & Planetary Sciences Engineering
JURNAL TEKNOLOGI TECHNOSCIENTIA dengan ISSN: 1979-8415 dan E-ISSN: 2714-8025 merupakan jurnal ilmiah yang diterbitkan LPPM Institut Sains & Teknologi AKPRIND Yogyakarta sebagai wahana publikasi karya ilmiah/penelitian di bidang teknologi atau rekayasa meliputi bidang teknik kimia, teknik industri, teknik mesin, teknik elektro, teknik informatika, teknik geologi, dan teknik lingkungan, terbit dua kali setahun pada setiap bulan Februari dan Agustus. Setiap naskah yang dikirim akan dilakukan review secara tertutup. Hasil review naskah meliputi: DITOLAK atau DITERIMA DENGAN PERBAIKAN atau DITERIMA. Setiap naskah yang dinyatakan DIITERIMA dan DITERBITKAN dikenakan biaya proses dan cetak sebesar Rp. 250.000,- (di luar biaya pengiriman) dikirimkan via transfer ke: Bank Mandiri Cabang Yogyakarta No.: 137-00-1255210-1 an.: Prof. Dr. Ir. Sudarsono, M.T.
Arjuna Subject : Energi (semua kategori) - Energi (Lain-Lain)
Articles 534 Documents
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ANALISIS FAKTOR GESEKAN PADA PIPA LURUS DENGAN VARIASI DEBIT ALIRAN Subagyo, Rachmat
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 3 No 2 Februari 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v3i2.483

Abstract

Distribution of laminar or turbulent flow is strongly influenced by the Reynolds number, Viscosity, pressure gradient and surface roughness. High coefficient of friction affect directly to a substantial reduction in pressure and eventually to the energy needed to push the fluid. Because of the role of the coefficient of friction is very important in the flow, so study has been conducted on the straight pipe, and friction factor with the variation of flow rate, by measuring pressure at two particular points to determine the loss. From the experimental results it can be concluded that the friction factor will be smaller in value with increasing Reynolds number and with the increase of Re, the friction factor value will be more stable. In the first experiment the highest friction factor occurs at Re = 4,30 x 104 with a value of f = 2,195 x 10-2 for the second experiment at Re = 1,41 x 104 with a value of f = 2,462 x 10-2 and the third experiment at Re = 2,39 x 104 with a value of f = 2,461 x 10-2. And for the lowest value occurred at Re = 1,91 x 105 with a value of f = 1,513 x 10-2, Re = 1,86 x 105 with a value of f = 1,521 x 10-2 and Re = 1,75 x 105 with a value of f = 1,544 x 10-2. At Re numbers began to 1,50 x 104 - 2 x 104 value of the friction factor tends to be stable (unchanged). The difference calculation from the experimental to the theoretical friction factor is 1,37% and to the moody diagram is = 1,14%.
PEMANTAU KESTABILAN TEGANGAN PADA JARINGAN LISTRIK 3-FASE BERBASIS PC DATALOGGER Hani, Slamet
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v4i1.484

Abstract

This research, is studied about a system of PC Datalogger capable to measure, record, present the graph of usher the phase and phase voltage with neutrally on 3-phase electric network in accurate figure, informative and realtime. The watcher of stability process abaut 3-phase electrics network in electronic can do to use transduser with three single phase transformator in way configuration, by using RS232 interface for data communications of PC and measure module. System examination to ability of application program 3-phase datalogger.exe run by PC as regulator process the datalogger voltage 3-phase watched. In this examination, result of voltage monitoring will be presented in separate linearity graph for the tension of test the R-N, S-N, T-N, RS, ST And TR com-paring with the time depth perception.
PENGARUH PENGGUNAAN SPONTAN POWER TERHADAP UNJUK KERJA MOTOR BENSIN NF 100 D -, Sudarsono
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 3 No 2 Februari 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v3i2.485

Abstract

Vehicles that are mostly still using conventional fuels (gasoline and diesel). The fuel demand is increasing in many areas, especially for automotive so we need to save energy by increasing engine performance. This case forced to examine the effect of using and without out the spontan power to the engine performance. This study used the constant load for each test (standard engine and the spontan power) with the variation of rotation 1500, 2000, 2500, 3000, 3500 , 4000, 4500, 5000, 5500, 6000 and 6500 rpm in laboratorium. This research was also conducted in the field to know the difference in ecceleration.The test had been conducted to assess the performance of a 4-stroke motor-cycle engine of 100cc Honda supra x 2001 and the result said that using the spontan power the torque rose 17.85% to standard conditions, the average power rose 14.79 % to standard conditions, the everage effective pressure rose 17.82%, average fuel consum-ption reduced 7.112% to standard condition and the everage efficiency increase 24.303% to standard condition.
PENURUNAN KADAR SUSPENDED SOLID DAN ZAT WARNA PADA AIR LIMBAH INDUSTRI BATIK DENGAN ARANG AKTIF -, Warsiyah
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 3 No 2 Februari 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v3i2.486

Abstract

Batik industri liquid waste contained the quite high concentrations of biodegradable and easily-rotten suspended solid and non-biodegradable dye. When no processing was conducted before it was disposed into receiving water body, such a condition would produce reduced quality of life. This research aimed to reduce the content of suspended solid and dye in liquid waste by using adsorption process through the use of active carbon media. Active carbon media-based adsorption has been one of the methods to solve pollution problem on receiving water body. Experimental method through the use of active carbon was adopted. The results of the experiment was developed into a design of waste processing instrument. The instrument was operated by setting absorbent, while the adsorbent was a pipe of 4 inch in diameter, and the surface area was 0.03243 m2. Water level was set to be 0.6 m higher than the media. Analysis variant is yused in dis research. Result indicated that active carbon was able to reduce SS and the dye. The efficiency of SS and the dye were 55.23% and 55.30%, respectively. The variant analysis showed F value at 5% significance level with 5.14 free grade of the effluent quality, and the adsorption of active carbon was better at the 70 cm thickness with maximum water height.
PENERAPAN METODE QUALITY FUNCTION DEPLOYMENT (QFD) SEBAGAI UPAYA UNTUK PENINGKATAN KUALITAS PELAYANAN Indriani, Sri; Sari, Sanny Andjar
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v4i1.487

Abstract

Quality of service is a very important factor in an entertainment business. This cases on research of MGM City Club is an entertainment business to the concept of One Stop Entertainment. Includes art galleries, Pub, Lounge, and karaoke.This study aims to analyze the quality of customer services and factors-other factors that can enhance pro-gress for the company. Fulfilling customer expectations and customer satisfaction will bring benefits to the company. To meet consumer expectations, it is necessary to perform design services with quality improvement QFD. The use of these methods can help com-panies focus on improvements that should be made to meet these consumer expecta-tions.Based on this analysis it is known that the highest attribute value of interest rate is "Keamanan saat berada di pub" with a value of 4.73, and the lowest is ”Adanya kemuda-han dalam penyampaian komplain” with the value 4.30. The value of the highest satis-faction level was “Sound yang memadai” with a value of 3.83 and the lowest is “Jumlah meja dan kursi yang memadai” with a value of 2.54. While the priority for attention by the pub was “Melakukan briefing setiap hari” with a value of 1.397.
AKTIVITAS VULKANISME EKSPLOSIF PENGHASIL FORMASI SEMILIR BAGIAN BAWAH DI DAERAH JETIS IMOGIRI Mulyaningsih, Sri; Husadani, Y T; Umboro, P A; Sanjoto, Siwi; Purnamawati, Dwi Indah
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v4i1.489

Abstract

The widely exposed of volcanic rocks within western part of Central Java-DIY Southern Mountain areas, indicates that volcanic activities had influenced geology of this area. Volcanic-stratigraphic study finds pumiceus rocks, tuff and co-ignimbrite breccias that can be described as primery volcanic rocks at study areas. Those volcanic rocks were erupted explosively followed by collapsing strato cone and forming new caldera. The associate of volcanic rocks with co-ignimbrite breccias, indicates that the central eruption was not far from the outcropes. Shallow intrusive rocks of andecites bearing hornblendes that exposed at the highest cone shape geomorphology of Gunung Gede, south to southwest Sudimoro, might be as the central eruptions.
SISTEM KENDALI PEMICUK LEDAK DENGAN DETONATOR LISTRIK MENGGUNAKAN TELEPON GENGGAM BERDASARKAN SMS (SHORT MESSAGE SERVICE) -, Subandi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v4i1.490

Abstract

The use of explosives/bomb was always considered bad and frighten for society because of the recent terrorist act. In fact, not only in the military field, Bomb can be used for construction (reconstruction), mining exploration, dramatization movie scene or something else, but can not be denied its high risk. Be clear about the bomb technology is not widely explored whether the explosives themselves, trigger/detonator, especially control systems.Control using a Mobile based on SMS has been used widely, considering the advantages of this control that it is low cost, wide coverage, and do not need to design the transmitter and receiver. The message sent is the format of PDU (Protocol Data Unit), but is converted to text for easy monitoring, a microcontroller with at-command (command function for HP) will read and recognize those formats to start the next action according to the instructions sent via message. By Sending an SMS (boom) to the mobile server, then messages are forwarded to the microcontroller. The results show that the system works well if the character that is sent in complaince then the microcontroller will execute the program to activate the electric detonators, the ecplosive will be ignited and successfully detonated.
ANALISIS PERUBAHAN VOLUME PADA CYLINDER HEAD DAN TINGGI LUBANG EXHAUST TERHADAP KENAIKAN DAYA SEPEDA MOTOR 2 LANGKAH -, Sudarsono
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v4i1.492

Abstract

The aim of this research is to know the effect of the change of cylinder head and the height of exhaust port to obtain great and safe power. Cylinder has many ports which are used in scavenging process (proses pemasukan, pembilasan dan proses pem-buangan) Exhaust port determines compression that is occurred in two stroke engine cycle and influences the engine characters. In standard condition, revolution 1500 produced 2 Nm torque. After modification, torque decreased to 1,5Nm. New torque increased in revolution 2000 rpm with 3,1Nm. Torque reached a peak from 10,8Nm in revolution 8500rpm to 13,6Nm in revolution 10.000rpm. Power produced in standard condition was 0,4Hp in revolution 1500rpm. After modification, it decreased to 0,3Hp. New power increased in revolution 3500rpm. Power reached a peak from 12,9Hp in revolution 8500 rpm to 19Hp in revolution 10.000rpm.
PENGAMATAN KESTABILAN LERENG TAMBANG MENGGUNAKAN SLOPE STABILITY RADAR (SSR) -, Supandi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v4i1.493

Abstract

Maintenance of the mine slope stability is very important to maintain continuity of mining activities. Although the mine design is done by carefully using several methods and approaches, but often there is a failure due to design limitations of geological information. In this case it is necessary to minimize the effects of a monitoring tool that can detect early indications of instability. In this study aims to determine the function of Slope Stability Radar (SSR) in the monitoring of slope stability is the end goal is to avoid negative impacts and risks of failure can be avoided mine design and sustainability of mining activities can proceed safely. In this study the observations using the Slope Stability Radar (SSR). Radars placed at a point perpendicular to the object in the observed and the radar will emit a wave toward the object and the object wave will be sent back and will be captured by the radar..In this study, the radar is installed in a certain position to monitor the movement of the walls of the mine and the results of research can be in the relationship between the movement of the actual conditions that exist. Monitoring the stability of the wall using the radar continues to be done at the time of stabilization and stabilization has been finished when done. Monitoring was stopped when the mine wall stabilisasi and activity near the ravine has been finished and there is no indication of movement of the slope. From this research produced the conclusion that the use of slope stability radar (SSR) are very helpful and effective for the observation of slope stability, especially to minimize the risk of mining activities.
KARAKTERISTIK MENARA PENDINGIN DENGAN BAHAN ISIAN TALI IJUK Johanes, Susanto
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v4i1.494

Abstract

In this study the characteristics of a water cooling tower with palm fibre as the packing material have been investigated experimentally. The experiments were carried out in a rectangle glass tower of 81 cm2 cross sectional area and 100 cm height. The packing used was constructed of 8 palm-fibre ropes (of about 0,6 cm diameter), zigzag and cross of water flow, and then it placed above the stainless steel support on the tower bottom. There were two type of packing i.e. 21,7.10-4 and 28,3.10-4 kg weigh of rope every m3 volume of the packing. The experimental results show that the increasing of the water inlet temperature and packing height causes the increasing of the tower characteristic . Mean while the increasing of the water/air mass flow rate ratio causes the decreasing of the tower characteristic.The tower characteristics is as a function of the investigated variables which expressed as: NTU = 165,24.10-3 (mw/ma)-0,999 (Z)0,5343 (Twi)0,1429 . It is for 21,7.10-4 kg/m3 of the specification of the packing material, with the relative error of 6,1 %, and NTU = 3,35.10-3 (mw/ma)-0,995 (Z)0,5050 (Twi)1,1643. It is for 28,3.10-4 kg/m3 of the specification of the packing material, with the relative error of 5,5 %.These equations are valid for the range variables, they are mw/ma of 4,46 – 9,48, Z of 30 – 90 cm, Twi of 50 – 60 oC. The mean effectiveness of the heat transfer were calculated to be 24,8 % and 25,9 %, respectivally for 21,7.10-4 and 28,3.10-4 kg/m3 of the specifications of the packing material.

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