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TEKNIK

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Published by Universitas Diponegoro

ISSN : 08521697 EISSN : 24609919 DOI : -

Core Subject : Engineering,

Engineering

Journal yang mempublikasikan artikel-artikel ilmiah dari berbagai disiplin ilmu rekayasa/keteknikan. Artikel-artikel yang dipublikasikan di Jurnal TEKNIK meliputi hasil-hasil penelitian ilmiah asli (prioritas utama), artikel ulasan ilmiah yang bersifat baru (tidak prioritas), atau komentar atau kritik terhadap tulisan ilmiah yang dipublikasikan oleh Jurnal TEKNIK.

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Articles 11 Documents

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Search results for , issue "Volume 34, Nomor 1, Tahun 2013" : 11 Documents clear

PENGARUH PERUBAHAN KECEPATAN KAPAL TERHADAP LEVEL KETINGGIAN AIR PADA SISTEM PALKAN IKAN HIDUP DENGAN SISTEM NATURAL UNTUK KAPAL IKAN TRADISIONAL DI KABUPATEN REMBANG JAWA TENGAH Sasmito Hadi, Eko; Wilma A, Wilma A; Munardi, Robby; Al Fahsan, Al Fahsan
TEKNIK Volume 34, Nomor 1, Tahun 2013
Publisher : Diponegoro University

Development of conventional fish hold design to live fish hold design may provide an alternative solution to keepcosts of preservation of fish catches down. Live fish hold systems left the water in the hold with sea water tocirculate around by giving a hole at the base of the hatch. Rembang traditional fishing vessel has the basiccharacteristics of a flat bottom with a long form of the stern board and has a habit of leaning on the edge of theocean with a sloping surface.The research was carried out on several models of variations in the number of holes and diameter of holes.Water in the live fish hold with ship stationary state will have the same height with a draught of ship, but asincreases of speed of ship then the height of water in the hold will decrease.Based on the analysis and calculation of Computational Fluid Dynamics method results obtained show that theoptimum velocity of each model reaches 7 knots. Models with a variation of amount 4 holes with 2 inch diameterhole has an average altitude of the highest water level of 2.16 m at a speed of 7 knots.

BENTUK KERJASAMA PUBLIC-PRIVATE PEMBANGUNAN GRAVING DOCK DAN MANAJEMEN GALANGAN KAPAL DENGAN METODE ANALYTICAL HIERARCHI PROCESS (AHP) Hartono Hartono; Arif Hidayat; Jati Utomo Dwi H
TEKNIK Volume 34, Nomor 1, Tahun 2013
Publisher : Diponegoro University

In paper Development of port infrastructure in Indonesia is now no longer the responsibility of centralgovernment, along with limited funds and the government's insistence seaport infrastructure needs. Toaccelerate economic growth, the government issued Government Regulation as a legal umbrella. The purpose ofthis study was to examine public-private partnership opportunities in the construction of graving dock andshipyard management. Targets do is review, the criteria are prioritized cooperation and cooperationpriorities.This study used qualitative and quantitative approach, a descriptive qualitative approach throughinterviews used to assess the normative aspect. The quantitative approach used to assess the priority criteriaforms of cooperation and public-private partnership in development graving dock and shipyard management byusing the Analytical Hierarchy Process (AHP). Based on the AHP analysis can be concluded that the expertsdisagree about the priority criteria of cooperation, where the majority of them choose the duration as the maincriterion. As for the analysis of priorities of the cooperation of all experts choose Built-Operate-Transfer (BOT),which is deemed suitable for long-term investment of up to 30 years. BOT puts private partners to more freely tofinance, construct, operate, anticipated rate of return on capital (rate of return) and the risks of commercial andregulatory aspects

PONDASI TIANG PANCANG DAKTAIL Dwi Atmanto, Indrastono
TEKNIK Volume 34, Nomor 1, Tahun 2013
Publisher : Diponegoro University

The driven ductile iron pile is a simple and economical driven foundation system made from ductile iron pipes.The pipe material is centrifugally-cast ductile iron, which has excellent ductility, strength, and corrosionresistance properties. The material behavior and the manufacturing of the pipes in the plant are described.Questions concerning corrosion are treated. The internal and external bearing capacity is discussed as well asthe production of the piles on construction sites. Finally the range of application in practice is presented.

STUDI PALEOSEISMOLOGI AKIBAT BENCANA GEMPA BUMI DI ZONA SESAR KALIGARANG (KGFZ) DI SEMARANG Fahrudin, Fahrudin
TEKNIK Volume 34, Nomor 1, Tahun 2013
Publisher : Diponegoro University

Earthquake in the past can study with paleoseismology. Kaligarang fault zone will record the event ofearthquake and result the sediment. The metode of research is detail field mapping and field excavation.Evidence of paleoseismology in the filed, we find the sand boil and carbon materials. We find two location ofsand boil near with reverse faults. Sand boil to precipitate at unit B Kalibeng Formation. Phase tectonic tocause earthquake occure at late Miocene â€“ Early Pliocene.

LOAD FAKTOR PERALATAN PADA KAPAL CARGO TYPE LCT (Studi Kasus Kapal Lestari Abadi 03) Ariany, Zulfaidah
TEKNIK Volume 34, Nomor 1, Tahun 2013
Publisher : Diponegoro University

This article titled is equipment load factor on cargo ship LCT type by taking a case study on Lestari Abadi ship03, the study aims to predict electric consumption calculation of LCT shipâ€™s type which concerning with thenumber and type of generator; effective and efficience power consumption, safe and effective electric instalationand existing panel. So, minimum required output electric installed to Kapal Lestari Abadi 03 has to 150KW, asspecification performed by caterpillar C9TA 150KW, 188KVA, 1500rpm, 50Hz and 0.8.

MODIFIKASI KARBON AKTIF SEBAGAI ADSORBEN UNTUK PEMURNIAN BIOGAS Susanto, Heru; Wijaya, Wishnu; Widiasa, I Nyoman
TEKNIK Volume 34, Nomor 1, Tahun 2013
Publisher : Diponegoro University

The use of biogas as an environmentally friendly fuel is limited by the presence of CO2 and water vapor asimpurities. Therefore, biogas purification for CO2 and water vapor removal is very important step during biogasapplication. This paper presents a process for biogas purification by means of adsorption using either modifiedor unmodified activated carbon as an adsorbent. The modification was performed by passing a pure ammoniagas into activated carbon in a quartz reactor. The results showed that the adsorption process using modifiedactivated carbon decreases CO2 content in biogas up to 67.5% whereas for unmodified activated carbon was of43%. Further, the modification increased CO2 adsorption capacity from ~28 to ~38 mg CO2/g adsorbent. Theincrease in feed temperature decreases CO2 adsorption capacity.

PENENTUAN BATAS WILAYAH LAUT PROVINSI JAWA TENGAH DAN JAWA BARAT MENGGUNAKAN DATUM GEODESI NASIONAL Kahar, Sutomo
TEKNIK Volume 34, Nomor 1, Tahun 2013
Publisher : Diponegoro University

According to Minister of Internal Affair regulation which is Permendagri No.1 Tahun 2006, Peta LingkunganLaut Indonesia (LLN) must be utilized to define boundaries of province sea jurisdiction. Unfortunately, PetaLingkunan Laut Indonesia still applies Indonesia Datum 1974 instead of Datum Geodesi Nasional 1995. It iscontrary with Permendagri No 76 Tahun 2012 and UU No.4 Tahun 2011 which declare the urgency of singlereference datum for Indonesia region. To fit the requirement, Peta Lingkungan Laut Indonesia must betransformed into official datum. This research applied two transformation formulae. There was LaufTransformations to accomodate 2 Dimension Transformation. Computation of transformation parameters andapplication of those parameters were tested at North Coast of Java from Kendal regency to Brebes regency. Ascalculated in MatLab software, this research concluded that Lauf transformation was good for transformingLingkungan Laut Indonesia from ID74 to DGN95.

EVALUASI EFISIENSI PANAS DAN EMISI GAS RUMAH KACA PADA ROTARY KILN PABRIK SEMEN Ridha Mutiara, Farisa; Hadiyanto, Hadiyanto
TEKNIK Volume 34, Nomor 1, Tahun 2013
Publisher : Diponegoro University

Kiln is an equipment which has vital existence in the manufacture of cement. Kiln firing requires a hightemperature to produce a clinker. Higher combustion temperature allows heat transfer occurs on the surfacecoating on the walls of the kiln that is not evenly distributed, so most of the heat is absorbed. As a consequence,it requires large amounts of fuel. Heat efficiency in the kiln is important to know. Production of clinker in thekiln which occurs at high temperatures, will also release a variety of gases, such as CO2. Carbon dioxide isincluded as one of the greenhouse gas, this gas will negatively impact the earth's ozone. Therefore, need to knowthe range of greenhouse gas that is formed, in order to determine the appropriate mitigation and prevention.Evaluation result of heat efficiency in the kiln is 43,17% by generating greenhouse gas emissions amounted to6,173 tonnes CO2 equivalent / tonne of coal.

METODE PENENTUAN VOLUME AGGREGAT PONDASI JALAN BERDASARKAN VARIASI DAN KESALAHAN: STUDI KASUS Simamora, Marsinta; Dwi Hatmoko, Jati Utomo
TEKNIK Volume 34, Nomor 1, Tahun 2013
Publisher : Diponegoro University

Variations between plans and reality can hardly be avoided in construction projects. These variations may beaccepted when they are still in the acceptance limits, or rejected when they are beyond the acceptance limits.The former is called variation in acceptance and the later is called error. Distinguishing these two in acompleted construction work is very important, as rejected variations (errors) may be considered as breaching acontract, thus may have legal implications. The research aims to evaluate the traditional calculation method(MeTrad) and to promote variation acceptance and error approach (MeVE) that is able to draw a clear linewhether a particular work to be accepted and rejected. The research was conducted by comparing the results ofcalculation of the aggregate volume between MeTrad and MeVE. The data was collected from Mauponggo-Puuwada road project in Nangakeo in 2010. The results show that there was no difference in the volumescalculated using both methods. The volume of Class B aggregate based on MeTrad calculation is 386.01m 3andthe volume based on MeVE is 386.01m3; where 16.67m3 of which (3.34% of the planned volume) is in the rangeof acceptance and 369.34m3 of which (73.94% of the planned volume)is the volume that is rejected (error). Theresults suggest that MeTrad cannot distinguish clearly whether the work is within the limits of acceptance orrejection, while on the other hand MeVE can describe in detail parts of the work to be accepted or rejected.Using this MeVE calculation, an assessment of a construction workis expected to be more objective anddetailed.

BIOBRIKET DARI CAMPURAN LIMBAH KULIT BIJI METE, SEKAM DAN JERAMI SERTA BUNGKIL JARAK, SEKAM DAN JERAMI Setia Budi, Faleh; Buchori, Luqman
TEKNIK Volume 34, Nomor 1, Tahun 2013
Publisher : Diponegoro University

The petroleum is the fuel derived from fossil which can not be renewable and the deposit in the earth is not morenow. In the middle 2008, the price of petroleum achieved US$ 147/Barrel because the supply of petroleum toworld market was reduced. This situation forced the appearance of the alternative energy which can replace thefossil fuel in the future. Their result of combustion has low emission so that they can be reduced the pollutionand were environment friendly. Biobriquette is the one alternative energy which expected to be able to replacethe kerosene and LPG. This research aims to get the exactly composition and type in manufacturing ofbiobriquette from cashew nut shell and jatropa shell waste. The variables choose as the independence variablewas the type of waste (cashew nut shell and jatropa shell) and the compositions (40, 60, 80 and 100%). Theothers are the fixed variable such as the size of briquette 4 cm and the total weight/biquette 25 g. The responseor parameters observed in the experiment were the color, the value of calor, the length of combustion and thecolor of fire. The result of experiment showed that composition of the material greatly affected the quality ofbriquette produced. The composition 100% owns the highest calor of combustion. The calor of Jatropa wastewas higher than that of cashew nut shell.

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