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INDONESIA
JURNAL POLI-TEKNOLOGI
Published by Politeknik Negeri Jakarta
ISSN : 14122782     EISSN : 24079103     DOI : https://doi.org/10.32722/pt.v20i1
Core Subject : Science, Engineering,
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation
Poli-Teknologi Journal is a journal, which began publication in 2002, published by the Research and community service Unit of Politeknik Negeri Jakarta. It starts from Volume 1 Number 1 in January 2022 for printed version; ISSN (print) 1412-2782 and ISSN (online) 2407-9103. Poli-Teknologi Journal is a series of scientific publications in applied science and technology area from the perspective of a multi and interdisciplinary studies and it is published 3 times in year.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 410 Documents
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RANCANGAN SISTEM INFORMASI PENDUKUNG KEPUTUSAN UNTUK PENENTUAN PERUSAHAAN SUPPLIER PERANGKAT LISTRIK DI POLITEKNIK NEGERI JAKARTA Tardi Tardi
Jurnal Poli-Teknologi Vol. 12 No. 2 (2013)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v12i2.506

Abstract

ABSTRACT The Design System Imformation of Supporting The Decisions For Ditermining Supplier Company of Electrical Components of State polytechnic of Jakarta.This paper describes the work of the system Analytical Hierarchy Process (AHP). AHP used as a tool to facilitate the selection of suppliers of electrical equipment in the laboratory component. AHP can casily determine the Eigen values of criteria consisting of the sale price, product quality, and after sales service and also an alternative value that consists of three companies (CV. Asia Mandiri, CV. Wirana Sejahtera, dan Iyotech Mandiri) to be partners suppliers of electrical components in Politeknik Negeri Jakarta. The system use pairwise matrix, factored by how many times it will get the highest Eigen value both of the criteria and alternatives. To speed up the retrieval of highest value and alternative criteria of could also SuperDecision Software, because simply enter the average value of the questionnaire it will get its Eigenvalues. Key word : Criteria, Alternatives, Priority, Analytical Hierarchy Process. ABSTRAK Tulisan ini berisi tentang sistem kerja dari Analytical Hierarchy Process (AHP). AHP dipakai sebagai alat untuk mempermudah pemilihan pamasok peralatan komponen di laboratorium listrik. AHP dapat dengan mudah menentukan nilai-nilai Eigen dari kriteria yang terdiri dari harga jual (HJ), mutu produk (MP), dan layanan purna jual (LPJ) dan juga nilai alternatif yang terdiri dari tiga perusahaan (CV.Asia Mandiri, CV. Wirana Sejahtera, dan Iyotech Mandiri) untuk dijadikan partner pemasok komponen listrik di Politeknik Negeri Jakarta. Sistem ini menggunakan matriks perbandingan berpasangan, dengan beberapa kali difaktorkan maka akan didapatkan nilai tertinggi Eigen, baik dari kriteria maupun dari alternatif. Untuk mempercepat pengambilan nilai tertinggi dari kriteria dan alternatif bisa juga digunakan perangkat lunak Super Decision, karena cukup dengan memasukkan nilai rata-rata dari kuisioner maka akan didapatkan nilai Eigennya. Kata kunci : Kriteria, Alternatif, Prioritas, Analytical Hierarchy Process.
KONVERTER AC-DC TIGA FASA TERKENDALI TERHADAP TOTAL HARMONIC DISTORTION (THD) PADA BEBAN INDUKTIF BERBASIS LAB-VIEW Kusnadi -; Prawito -
Jurnal Poli-Teknologi Vol. 12 No. 2 (2013)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v12i2.523

Abstract

ABSTRACT Application of non linear loads are widely used in household industries, office buildings and factories such as power converters for motor speed control of ac/dc, un-interruptible power supplies (ups) lampfluorescent using electronic ballas. Ac-dc converters use of electronics will draw distorted current containing harmonic components and will cause the overall system power factor is reduced. Distorted currents will contain thd% (total harmonic distortion). In the operation of ac-dc converter controlled three-phase, setting the ignition point is worth noting. Giving improper ignition angle can cause the ac-dc converters do not work optimally. In this study, presented a new method to measure the thd% automatically on the input side of the net ac-dc converter controlled three-phase as a function of ignition angle based on an inductive load labview 8.5 and ni-dq 6008. Laboratory experiments conducted by evaluating the value of thd% and looking for work operations ignition angle as a function of% thd on the input side of the net ac-dc converter is controlled to a three-phase inductive load using labview 8.5 software and hardware ni-dq 6008. Experimental results of the operation value of work ac-dc converter: the load l1 = 0.25 h. Value of 31% ≤ thd ≤ 35% and ≤ 52.2 (α0) ≤ 58.09, with a presentation error ≤ 0.2%. For thd 5%, while for thd%> 35% will get a% e> 4%. On load l2 = 0.56 h.nilai thd ≤ 31% ≤ 36% and (α0) = 54 with a percentage error ≤ 3% Keywords: ac-dc converter, thd. Lab view ABSTRAK Aplikasi beban non linier sangat luas digunakan di industri rumah tangga, gedung perkantoran dan pabrik seperti konverter daya untuk pengendalian kecepatan motor ac/dc, un-interruptible power supplies (ups) lampu fluorescent yang menggunakan ballas elektronik. Penggunaan konverter ac-dc elektronik akan menarik arus terdistorsi yang mengandung komponen harmonisa dan secara keseluruhan akan menyebabkan factor daya system menjadi berkurang.arus yang terdistorsi akan mengandung thd%(total harmonic distortion). Dalam pengoperasian konverter ac-dc tiga fasa terkendali ,pengaturan sudut penyalaan merupakan hal yang perlu diperhatikan. Pemberian sudut penyalaan yang tidak tepat dapat menyebabkan konverter ac-dc tidak bekerja secara optimal. Pada penelitian ini, suatu metoda baru dipresentasikan untuk mengukur thd% secara otomatis pada sisi input jala-jala konverter ac-dc tiga fasa terkendal sebagai fungsi dari sudut penyalaan pada bebaninduktif berbasis lab-view 8,5dan ni-dq 6008. Ekperimen dilakukan dilaboratorium dengan cara mengevaluasi nilai thd% dan mencari operasi kerja sudut penyalaan sebagai fungsi dari %thd pada sisi input jala-jala konverter ac-dc tiga fasa terkendali untuk beban induktif dengan menggunakan software labview 8,5dan hardware ni-dq 6008. Hasil ekperimen menghasilkan nilai operasi kerja konverter ac-dc :pada beban l1=0,25h .nilai 31%≤ thd≤35% dan 52,2≤ (α0)≤58,09 ,dengan presentasi kesalahan ≤0,2%.untuk thd5%, sedangkan untuk thd%>35% akan mendapatkan %e>4%. Pada beban l2=0,56h.nilai 31%≤thd≤36%dan (α0) =54 dengan persentasi kesalahan≤ 3%
KNOWLEDGE MANAGEMENT SYSTEM UNTUK PEMBANGKIT LISTRIK TENAGA MIKROHIDRO Anwar Said
Jurnal Poli-Teknologi Vol. 12 No. 2 (2013)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v12i2.531

Abstract

ABSTRACT Some of rural areas in indonesia in fact is still have not getting electricity power supply enough. While demography in indonesia is potential to built micro hydro power (mhp). Micro hydro power (mhp) become solution to cover the needs of electricity because of the mhp manufacture is not wasting a lot of fund. In addition to cheap, mhpdoes notdamage the environment because people have to keep the water supply flowing/riverby keeping the trees int he head waters area, including no cutting of trees and littering. However, the information of this mhp haven’t spread to people in indonesia or community lived in the rural areas who needs electricity power supply. The development ofinformation technology givea significant impactfor people.with the creation ofa knowledge management system ,is expected to mhp information abou tmicro hydro can be spread to public in detail and easy to reach. Further this knowledge management system can be a reference for future progress in the mhp. Design of knowledge management system begin with identifying the needs of system. Then the modeled of knowledge management system, based on these needs will be made by usinguml. The design is an interface of knowledge management system based on internet access which have the facilities like searching, transfer, distribution, and adding the newest knowledge of micro hydro and mhp. Keywords : design, interface, knowledge management, micro hydro ABSTRAK Sebagian pelosok daerah di indonesia pada kenyataannya masih belum mendapatkan pasokan listrik yang memadai. Sedangkan kondisi sebagian besar wilayah indonesia, sangat berpotensi dibangun pembangkit listrik tenaga mikro hidro (pltmh).pltmh dapat menjadi solusi pemenuhan kebutuhan listrik karena pembuatannya dan murah. Selain murah, pltmh tidak merusak lingkungan karena masyarakat harus menjaga ketersediaan air mengalir / sungai dengan menjaga pepohonan di daerah hulu sungai termasuk tidak menebang pohon dan membuang sampah sembarangan. Namun informasi mengenai solusi ini/pltmh masih asing bagi masyarakat daerah dan sulit untuk didapatkan. Perkembangan teknologi informasi yang sedemikian cepat memberikan dampak yang cukup signifikan terhadap kemajuan informasi bagi masyarakat luas. Dengan pembuatan sistem knowledge manajemen untuk pltmh diharapkan informasi mengenai mikrohidro dapat diterima masyarakat luas secara detail, rinci, dan mudah. Selanjutnya sistem knowledge manajemen dapat menjadi referensi bagi kemajuan pltmh di waktu mendatang. Perancangan sistem knowledge manajemen dimulai dengan melakukan identifikasi kebutuhan sistem. Berdasarkan kebutuhan tersebut dibuat desain sistem, yang dimodelkan dengan menggunakan metode uml berupa rancangan interface sistem knowledge manajemen mikrohidro berbasis internet yang memiliki fasilitas untuk mentransfer, mendistribusikan, serta menambahkan knowledge terbarukan untuk pltmh Kata Kunci : Rancangan, PLTMH, Interface , knowledge management, micro hydro
PERBANDINGAN EFISIENSI BAK PROSES DUA SEL DAN TIGA SEL DALAM MENURUNKAN KANDUNGAN BESI (Fe) DALAM AIR LIMBAH SECARA ELEKTROKOAGULASI DENGAN KATODA DARI KARBON BEKAS BATERAI Sutanto Sutanto
Jurnal Poli-Teknologi Vol. 10 No. 1 (2011)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v10i1.537

Abstract

The content pollutants of iron (Fe) in waste water that uncontrolled can cause environmental pollution. Iron content in the waste water that exceeds 1 mg / L is not safe for the environment. Because the regulation of the Minister of Environment No.Kep-03/MENKLH/II/1991 explained that the maximum content of iron in the waste water is 1 mg / L If the iron content in the waste water exceeds that of such provision, the waste water must be treated until comply with the regulations of the Ministry of Environment. One of the processing carried out in this research is to apply the electrocoagulation process with aluminum as anode and waste carbon baterry as cathode. The research is conducted by flowing water of 7 liters of industrial waste water into the bath electrocoagulation process. The process is runing in the two and three cell of tank with an power electric 12 V and intervals of 2 minutes for observation iron content in waste water. The iron content in waste water is analyzed by Atomic Absorption Spectrophotometer (AAS). The results of process until 28 minutes showed that the iron content is reduced from 4.23 mg/L to 0.91 mg/L or equivalent with 78.49 % for process in two cells and from 4.23 mg/L to 0.33 mg/L or equivalent with 92.20 % for process in three cells. Conclusion, the efficiency of the three cells is the best than two cells to reduced iron content in the waste water. Keywords:Waste water, Pollutant of Copper,Electrocoagulation,Reduction of Pollutant
HUBUNGAN ANTARA SUDUT PEMAKUAN DAN BEBAN TEKAN AKSIAL SEJAJAR SERAT PADA SAMBUNGAN BERHIMPIT PAPAN KAYU Mursid Mufti; Putera Agung M. Agung
Jurnal Poli-Teknologi Vol. 12 No. 1 (2013)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v12i1.587

Abstract

Relationship between angle of nailing direction and axial force in line with wood fibre has not been discussed yet indetail of “peraturan konstruksi kayu untuk indonesia (pkki), ni-5, 1961, in all section 15”, which explaines about wood joints with standard nailing. Nail material is one of joint instrument types which are used largely in wood construction. Research uses model test where variation of angle of nailing direction is apllied in one type of wood lap joint, and loads variation in loading test is accounted by amount of fabricated brickwall causing rupture of wood lap joint tested. The research shows that angle of nailing direction in range 60 – 140o would result maximum axial force in line with wood fibre. Keywords: angle of nailing direction, axial force
STUDI KASUS KERUSAKAN JEMBATAN DAN PENGARUHNYA TERHADAP SISA UMUR JEMBATAN Andi Indianto; Iwan Supriyadi
Jurnal Poli-Teknologi Vol. 12 No. 1 (2013)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v12i1.589

Abstract

This paper presents the results of research case studies of bridge damage and influence on the remaining life of the bridge. This research takes the case of the highway bridge between kebon jeruk – penjaringan west of jakarta. The purpose of this activity is to get an idea of the residual life of the bridge that is related to the presence of defects in the structure of the bridge. To determine the actual condition of the bridge, performed data collection by measuring the compressive strength of concrete, crack depth, crack width, thick concrete cover, reinforcement diameter, reinforcement spacing, deflection due to load and run. From these data made feasibility and serviceability analysis to determine the value of the bridge.condition. Furthermore value condition used to predict the residual life of the bridge. The results of the residual life analysis showed that highway bridge on 1 segment , who suffered damage to the value of the condition 2.67, residual life if the damage continue only 1.07 years, and if the damage does not continue, the remaining life of 11.67 years. For segment 3 which suffered minor damage with the value of condition 2, residual life if the damage continues only 2,125 years, and if the damage does not continue the residual life of 18.89 years. Keywords: bridge, pile slab, value condition, feasibility, serviceability, remaining life.
KARAKTERISTIK BETON ASPAL DENGAN SUBSTITUSI AGREGAT LIMBAH INDUSTRI PENGOLAHAN BIJI BESI (STEEL SLAG) Nunung Martina; Rinawati Jakfar
Jurnal Poli-Teknologi Vol. 12 No. 1 (2013)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v12i1.591

Abstract

Hot mix asphalt concrete with substitution of waste metal processing ( steel slag ) aggregate is the result of residual waste processing or a crust of iron ore furnace , visually shaped as hard lumps and irregularly shaped rock , has a specific gravity > 2.9, steel slag considered as a heavy aggregate. According to the sii 0052-80, steel slag that had less than 27% destroyed sections through a 1.7 mm sieve when tested with los angeles engines, can be used as aggregate. A 50% substitution variation of steel slag aggregate provides characteristics of asphalt concrete mixtures that is eligible to the bina marga 1998 requirement, with the optimum value at the variation of 50 % steel slag to coarse aggregate, with the stability value of 1016.00 kgf, melting value ( flow ) has the lowest value of 3:32 mm , marshall quetion optimum at 306.30 , cavities in aggregate > 16 % , the cavity filled with asphalt > 65 % , the cavity in a mixture of 3 % - 5 % . Keywords : steel slag , filler , marshall test , temperature , asphalt concrete
OPTIMALISASI KAPASITAS GERBANG TOL SEMANGGI I DAN SEMANGGI II TERHADAP PANJANG ANTRIAN KENDARAAN Achmad Nadjam; NURRIFAI NURRIFAI; ACHMAD ADYATMOKO
Jurnal Poli-Teknologi Vol. 12 No. 1 (2013)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v12i1.592

Abstract

Research on optimization of the capacity of toll gate semanggi 1 and 2 to long queues of vehicles is done by the queue theory approach and the capacity of the toll gate. Calculation of additional substation on the optimal number of toll gate semanggi 1 and 2 uses multiserver queuing theory. To address the causes of the most dominant variable in the long queue of vehicles is done by statistical tests. Increasing the number of substations which is done must be adjusted by the number of long queues of vehicles that are allowed by the minister for state owned company is 5 vehicles. The research methodology used is to conduct a survey of service time, the volume of vehicular traffic, the caused of the long queues of vehicles and open-close timing of toll gate semanggi 1. Based on the analysis obtained by calculating the optimal number of substations, based on normal conditions, changes in payment mechanisms and arrangements open and close toll gates semanggi 1 variable causes the most dominant long queue which is dated within one month of the service time of the transaction, a large nominal payment to the substation as well as the date of service time in 1 month and non-normal behavior of users jointly affect the service time of transactions. The result is the calculation of the optimal number of substations based on the change in payment mechanism at toll gate semanggi 1 with 3 main substations, while the toll gate semanggi 2 with 4 main substations. The optimum number of substations based on normal conditions at toll gate semanggi 1 are 4 main substations, while the toll gate semanggi 2 are 2 main substations and 2 tandem substations, while the number of substations based on the optimal open-close system at toll gate semanggi 1, at toll gate clover 1 is 4 main substations, while at toll gate semanggi 2 by 4 main substations. The timing for the opening and closing of toll gate semanggi 1 is 11 minutes for closing time, and 49 minutes for every hour of time in the open condition. Key words: optimization, toll gate capacity, queuing vehicles
ANALISIS KINERJA BETON ASPAL BERBAHAN TAMBAH LIMBAH BOTOL AIR MINERAL (PET) TERHADAP VARIASI TEMPERATUR DAN LAMA PERENDAMAN BANJIR EVA AZHRA LATIFA; EDY PRAMONO
Jurnal Poli-Teknologi Vol. 13 No. 1 (2014)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v13i1.594

Abstract

Roads with flexible pavements whose surface layer consists of asphalt concrete have a high likelihood to get deteriorate due to frequent submersion caused by floods. This research aims to attain an economical asphalt concrete mix with high durability to submersion under the influence of high temperature. Performance is improved by making the asphalt concrete mix resistant to temperature changes through adding mineral water bottle wastes into asphalt until the optimum characteristics are attained. The filler aggregate used is stone ash. Research is conducted on the asphalt concrete mixture that submerged for 24.72 and 120 hours at 300, 380, and 500 celsius. Stability, flow, marshall quotient and pore contents are all tested by the marshall method. . Determination of the best mix with soaking time and temperature variation is done by the regression analysis method. Keywords: aggregate filer, asphalt concrete, mineral water bottle waste, submersion, stability, temperature.
PROTOTIPE DINDING BETIK HASIL DAUR ULANG SAMPAH PLASTIK SRI RESPATI NURCAHYANINGSIH; KUSUMO DRADJAD SUTJAHJO; DJEDJEN ACHMAD
Jurnal Poli-Teknologi Vol. 12 No. 1 (2013)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v12i1.596

Abstract

Researches about plastic concrete(betik)have been done since 2004 by kusumo drajad s. Betik consistsof a mixture of cement, sand, plastic aggregates (pellets) and water, can be categorized as lightweight concrete which have the same compressive strength with the normal concrete, approximately 120 kg/cm2. The research prototype betik walls which is done today as the result of the development composision ofbetik , consist of 1portion of cement, 2 portions of sand and 4 portions of plastic aggregate (recycling product ) and 0,6 portion of water. Afterward, all materials were mixed and poured into plastic bottles of mineral water packaging (such as aqua, ades ). Before the bottles are filled in,it should be cut into24 cm high, assembled with bendrat wires, and added concrete steel reinforcement diameter of 8 mm at the center of the bottle into a series of blocks that consisting of 6 bottles. Based on the testing in physical properties of a block betik’s wall samples have been tested: the slump’s average value is 6cm, the bottom’s surface is quite smooth, no cracked and all intact, but there are several cross-section of bottle that has been filled betik not circle.the experiment also showed: the size of betik’s block : 8.5 cm widht, 48 cm length, 24 cm high and average weight of each block betik’s walls is 9.5 kg. Furthermore, the blocks of betik’s wall were arranged and bonded using mortar that has composition 1 portion of cement and 4 portions of sand. The block of betik’s wall also supported horizontally by using bendrat wire and vertically by using 8 mm concrete bar, and shaped a segment of betik’s wall into 1.5 x 1.5 m. Subsequently, the wall of segment was standed up and than taken off, so the wall collapsed. The results shown that the knots of bindrat or concrete bar were in good condition and didn’t fall. The other results in this study were the blocks of betik’s wall blocks that collapsed are still in whole condition and it can be used again. Keywords: betik, plastic pellets, walls, concrete

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