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Development of ECU (Electronic Control Unit) to Maintain Stability of Biogas Fuelled Generator
Get PDFBiogas fueled generator has a unique character because the converter kit on the generator has the characteristic of absorbing the biogas supply. Therefore, in this study, biogas is accommodated in a plastic container equipped with a valve that can adjust the amount of biogas supply pressure. Combustion in the Genset combustion chamber will occur if the ratio of air supply and supply of biogas (AFR = Air to Fuel Ratio) meets the stoichiometric number. So a ratio control is needed on air supply and biogas supply, which can follow changes in biogas conditions in plastic bags and generator loads. For this reason, this paper presents an ECU (Electronic Control Unit) that can regulate the ratio of air supply to biogas supply by using a servo motor valve, which is commanded by a control signal from the ECU. The resulting ECU prototype is equipped with a multi-input connector (to receive the signal output of CH4 methane gas sensor and the biogas supply pressure sensor), multi-output (control signal to the servo motor valve), and multi regulators to adjust the Set Point value for the methane gas content CH4, the value of the set point of the biogas supply pressure and to tune the value of the proportional gain control (KP). The results of the ECU performance test by trial and error by giving a dummy input signal (analogy to the signal output of methane gas sensor and the analog of the pressure sensor output signal in the form of an electric voltage generated from the signal generator) can drive the servo motor, valve air supply, and servo motor, valve supply biogas. Accordance with the gain control input from the regulator.
21 Bar Yoshimin Boiler Maintenance with Controlling Residual Phosphate
Get PDFBoiler as the steam generator is usually utilized as a turbine drive and other industrial processes. Boiler needs good treatment and surveillance to keep its best performance. Boiler water (BW) and boiler feed water (BFW) quality control is essential in boiler maintenance since it preserves boiler from crust, corrosion, and carry over, moreover, it also prevents boiler pipe to break. Boiler maintenance in sugar refinery factory is carried out by controlling the quality of BFW, Chemical injection (inner maintenance) and blowdown of boiler water. BFW mineral content (SiO2 , total hardness) is maintained as small as possible using a softener (cation resin) or demineralization unit (cation and anion resin). Chemical injection is performed by the addition of soda in order to control the pH of boiler water. Phosphate addition aims to tie up total hardness level which is caused by concentration process of water boiler and slipped of hard water from BFW. Blowdown process has purpose to reduce crust and corrosion caused by mineral concentrate inside boiler. The experiment was conducted by controlling pH of BFW from 7.5-8.5, maximum total hardness at 3 ppm, maximum SiO2 concentration at 3 ppm and maximum Total Dissolve Solid (TDS) at 100 ppm while BW was controlled its pH at 10.5-11, maximum total hardness at 20 ppm, maximum SiO2 concentration at 50 ppm, maximum Total Dissolve Solid (TDS) at 2000 ppm, and residual phosphate ion between 4 – 10 ppm. The experiment time was adjusted as a milled day or about for 140 days. The result of the experiment showed that the treatment had a good impact on the condition of the boiler drum pipe
Analysis of Container Problems in Exception Area at PT. Terminal Petikemas Surabaya uses the Lean Six Sigma Method
Get PDFPT Terminal Petikemas Surabaya is a company engaged in logistics, container services. Since the end of December 2019, PT Terminal Petikemas Surabaya began implementing a gate automation system at gate in exports. One thing that is done to support the gate automation is the Exception Area which is used as a data repair place for trucks that experience problems during the gate-in export process before heading to the stacking field. Containers that are constrained during the gate-in process indicate that there are procedural errors carried out by internal companies and external parties, such as drivers, forwarders, and importers related to administrative and technical problems. This research focuses on controlling the quality of container problems that enter the exception area by using a statistical method in the form of lean six sigma. The purpose of this study is to determine the average length of time to resolve containers for each problem, to know the quality of and the sigma level of the average length of time to resolve containers that enter the Exception Area based on the average number of container problems entering the Exception Area according to five problem criteria, knowing the problems that cause themost of the containers that enter the Exception Area. The results of the analysis in this study are the average length of time for containers that enter the Exception Area for each problem as a whole, the highest is caused by the system and the lowest is due to the closing time. The average number of container problems that enter the Exception Area in accordance with the five criteria, the problem has been controlled statistically with the most problem causes caused by the system, and the sigma level value is obtained from the average number of container problems that enter the Exception Area according to the five problem criteria which is 3,395, which means the variation or diversity of container problems that enter the exception area based on the problems of the containers that enter the Exception Area according to the five criteria, the problem is quite large
Blockchain at the Service of Ocean Challenges: Discard Management and Bycatch Control
Get PDFThe purpose of this paper is to introduce a new alternative method of seafood management by using blockchain technology with a particular emphasis on bycatch and overfishing. The paper has been investigated through an innovative connection between the various consumers in the world, what we call bycatch can be considered as food for humans, animals, or plants. In addition, numerous parties that are directly or indirectly connected to the seafood industry can utilize the blockchain platform in order to facilitate seafood trading, especially what is called bycatch. The data analyzing in this paper has been clarified using a decentralized management system, seafood resources, and human consumption can stay in a semi-equilibrium. Furthermore, the paper can take the first steps to reduce environmental catastrophes caused by humans on the ocean
Overcoming Project Delivery Delays in A Consulting Firm: A Knowledge Management Perspective
Get PDFBased on Investment Coordinating Board (BKPM) press release, the investment realization in Indonesia for the period of 2015-2018 shows a positive trend. In addition, the issuance of Presidential Regulation No. 24 of 2018 related to Online Single Submission (OSS) which facilitates the issuance of licensing in Indonesia. This has a direct impact on the consulting firms, as the Foreign Investment Company (PT PMA) tends to transfer their internal activities to service provider companies to provide opportunities to fulfill their objectives to gain competitive advantage. Seeing this great potential, leads to growth in companies engaged in consulting. In Jakarta alone, there were at least 66 consulting firms which are working in similar field. During project completion, there are several obstacles causing delays in project delivery namely transfer of knowledge that was that was not carried out effectively due to changes in regulations. This research uses a qualitative method in the form of interviews processed through coding categorization, observation & archive at a consulting firm, BDO Indonesia. Furthermore, knowledge management systems, SECI and knowledge flow are presented. The result of this research shows the importance of knowledge management perspective to overcome the project delivery delays in the consulting firm
Analisis Risiko Penyebaran Kasus Covid-19 di Surabaya Raya Menggunakan Model Thomas Cluster Process
No full textCOVID-19 menyebar cepat di Jawa Timur khususnya daerah Surabaya Raya yang memiliki jumlah pasien terkonfirmasi positif tertinggi dibandingkan kota/kabupaten lainnya di Jawa Timur. Kota Surabaya merupakan kota dengan jumlah pasien terkonfirmasi positif terbanyak dibandingkan Kabupaten Sidoarjo dan Gresik, dimana pada tanggal 20 Maret hingga 9 Juli 2020 68% dari jumlah kasus di Surabaya Raya merupakan kasus COVID-19 di Kota Surabaya. Hasil eksplorasi data menunjukkan bahwa data COVID-19 di Surabaya Raya tidak homogeny dan cenderung membentuk kelompok. Pemodelan kasus COVID-19 dengan Inhomogeneous Thomas Cluster Process menunjukkan kepadatan pabrik dan kepadatan tempat ibadah secara signifikan mempengaruhi persebaran COVID-19 di Surabaya Raya, dimana setiap penambahan 1 pabrik dalam 1 km2 akan meningkatkan risiko COVID-19 sebanyak 2 kali lipat. Sedangkan jika dalam 1 km2 terjadi penambahan sebanyak 1 tempat ibadah maka risiko meningkatnya kasus COVID-19 di Surabaya Raya sebesar 4 kali lipat jika dibandingkan dengan tidak ada penambahan tempat ibadah, sehingga diantara kedua variabel tersebut yang memberikan pengaruh besar terhadap risiko peningkatan kasus positif COVID-19 di Surabaya Raya adalah kepadatan tempat ibadah. Estimasi jumlah kasus positif COVID-19 di Surabaya Raya adalah sebesar 161 kasus dengan standar deviasi kasus positif COVID-19 baru tersebar disekitar lokasi early case adalah sebesar 1,21 km. Validasi model dengan plot envelope K-Function menunjukkan bahwa Inhomogeneous Thomas Cluster Process baik digunakan untuk memodelkan data COVID-19 di Surabaya Raya pada 20 Maret 2020 hingga 9 Juli 2020
Penutup Jurnal
No full textJurnal Manajemen Aset Infrastruktur & FasilitasVolume 5, Nomor 1, Januari 2021 (e) ISSN 2615-1847 (P) ISSN 2615-1839JMAIF, Vol. 4, No. 4, Oktober 2020Faktor Keengganan Pelajar Bersepeda di Yogyakarta Isa Indrawan, Muhammad Zudhy Irawan & Siti MalkhamahPotensi Permintaan Angkutan Umum pada Rencana Rute Feeder di Kecamatan Kuta Alam, Kota Banda Aceh Rio Erlangga, Cut Mutiawati, Fitrika Mita Suryani & MarwanAnalisis Kinerja Aset Destinasi Wisata Waduk, Studi Kasus: Waduk Cijere, Kabupaten Bandung Barat Hennidah Karnawati, Putri Dewi Purnama & Tiara Ulul AzmiKinerja Simpang Monumen Trunojoyo di Kecamatan Sampang, Kabupaten Sampang A. Yusuf Zuhdy, Triaswati M. Notodiningrat, Aan Fauzi & Lukman YusufPartnership Scheme Alternatives for Low-Cost Rental Public Apartment in Indonesia Ria Asih Aryani Soemitro, Farida Rachmawati, Tri Joko Wahyu Adi & Connie SusilawatiPersepsi Masyarakat Mengenai Prioritas Pembangunan Infrastruktur Desa Berbasis Mitigasi Bencana (Studi Kasus Nagari/Desa Inderapura Selatan) Anggraini Rasadi, Benny Hidayat & Taufika OphiyandriPenilaian Tingkat Kerentanan Bangunan Gedung Di Area Sekolah SIT Aliya Bogor Muhamad Lutfi & Rafitri SuryawaniJMAIF, Vol. 4, No. 3, Juli 2020Evaluasi Kinerja Aset Fasilitas Wisata Domba di Kabupaten Garut Fadila Febianisa Slamet & Nurlaila FadjarwatiDampak Perkembangan Pariwisata Pulau Lombok terhadap Pengembangan Bandar Udara Internasional Lombok Putu Agus Valguna, Dewanti & Latif Budi SuparmaEvaluasi Kinerja Aset Tempat Pengolahan Sampah Terpadu (TPST) di Kabupaten Sidoarjo Marlena, Tri Joko Wahyu Adi & I.D.A.A. WarmadewanthiAnalisis Kebijakan Struktur Tarif dan Pengaruhnya terhadap Besaran Subsidi (Studi Kasus : TransJakarta) Mira Lestira Hariani, Idwan Santoso & Sony Sulaksono WibowoPemanfaatan Bagian-Bagian Jalan Nasional, Studi Kasus di Ruas Jalan MERR Surabaya Dyah Kusuma Dewi,, Ria Asih Aryani Soemitro, Hitapriya Suprayitno & Herry BudiantoAnalisis Standar Perancangan Geometri Rel Kereta Cepat (Studi Kasus : Kereta Cepat Jakarta - Bandung) Rahmi Fajriati, Suryo Hapsoro Tri Utomo & Imam MuthoharPerbandingan dan Sintesa Karakteristik Perilaku Perjalanan Penumpang KA Komuter SULAM dan KA Komuter SUPORAnita Susanti,, Ria Asih Aryani Soemitro & Hitapriya Suprayit
Performance Optimization of Gas Turbine Generator Based on Operating Conditions Using ANN-GA at Saka Indonesia Pangkah Ltd
Get PDFA Gas Turbine is a rotary engine that extracts energy from a flow combustion gas. The reliability and efficiency of gas turbines are one of the top priorities at Saka Indonesia Pangkah Ltd (SIPL). In order to optimize the operating conditions of a gas turbine, three components are needed. First is the problem formulation which consists of objective functions, problem boundaries or constraints, and determination of optimized variables. The second component is a valid model, which represents the characteristics of a gas turbine installed in SIPL. The third component is the optimization technique that is suitable with the optimization problem that will be solved. In this paper, the objective function is maximizing gas turbine efficiency, some operational limitation as constrains by manipulating air to fuel ratio. The model was developed using Artificial Neural Network (ANN) and Genetic Algorithm (GA) was selected as the stochastic optimization technique to solve the problem. The neural network model created directly using the operational data from an actual parameter gas turbine generator. The data needed for ANN-based modeling is around 8150 data sets that will be used to train and validate the ANN model. Variable data sets were divided in two parts, for training purposes is 87.5% and for validation is 12.5%. Weight management for neural networks was carried out using Levenberg-Marquardt algorithm which could give good results with RMSE = 7.3 X 10-3. From the results of the stochastic optimization (GA) simulation, the potential reduction of fuel gas consumption is around 280.8 kg/hr if the air mass flow can be increased from 2.4 kg/s to 2.7 kg/s or efficiency increase up to 10.6%
The Influence of Islam and Javanese Culture on The Meaning of Keraton Surakarta Hadiningrat’s Architecture
Get PDFThe effects of religion and culture to the people’s life in Indonesia certainly become inevitability. Keraton, as the residence of the king and the family has philosophical concepts and meanings on each element. Keraton Surakarta in physically and principle adheres to the philosophy of the Javanese people’s life as a media of Islamic development as well as the Javanese culture. This study aims to find out the influence of Islamic values and Javanese culture on the architecture of Keraton Surakarta, especially on the philosophical meaning. The research paradigm used in this study is the Inter-subjective Paradigm. The method applied is Combined Strategies, between Historical Research and Qualitative Research. The data collection was obtained through the literary study, observations, and interview of Keraton Royal Family and The Servants. Research conclusions came from verifying data with interpretation and historiography on the research object. The result of this study is the architectural significance of Keraton Surakarta applying islamic values combined with Java 'cultural philosophy especially to the building orientation and layout sequences. Imprinted meaning derived from the core of the value of human's relationship with god and the courtship philosophy of the Manunggaling kawula gusti
Using ADDIE Model to Appraise MOOC English for Non-Academic Staffs (ENAS) Designed for University Non-Academic Staffs Amid the COVID 19 Outbreak
Get PDFTo help universities non-academic staffs maintain their productivity amid the COVID 19 outbreak, MOOC ENAS was developed. To guarantee the eligibility of the program, through this research, ADDIE model was employed to evaluate the course plan. Step 1 and 2 out of the whole 5 steps of ADDIE were used to describe qualitatively about the course design. Using an online questionnaire, the authors received 110 responses and were able to demonstrate that the design had the quality for a good course design. This was led by the results of investigation on the participants’ background correspond to the course plan including the description and objectives. It was figured out that the design was able to accommodate the participants’ language learning demands. The course design facilitated students learning by serving their education background, their workplace origin, and their already existing language learning experience. However, the study was lacking in the generalizability. To serve this, further research is needed by adding quantitative data so that the results of the evaluation could be presented in numbers that were more accurate and elusive. Finally, in terms of design, the MOOC ENAS is quite accommodating to be further continued into development of course content, implementation, and evaluation as assigned in ADDIE Model