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All Journal Jurnal Hukum Ekonomi Islam (JHEI) Jurnal Teknik Mesin Sinergi Jurnal Ilmu dan Inovasi Fisika
Rian Pratama
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Computer Science & IT Electrical & Electronics Engineering Energy Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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SIMULASI PENGARUH VARIASI EKSTRAKSI TURBIN TERHADAP EFISIENSI TERMAL SISTEM PLTU BARRU MENGGUNAKAN MATLAB/SIMULINK Remigius Tandioga; Apollo Apollo; Rian Pratama; Eko Kurnala
Jurnal Teknik Mesin Sinergi Vol 14, No 2 (2016): Oktober 2016
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (646.831 KB) | DOI: 10.31963/sinergi.v14i2.1172

Abstract

Basically extraction turbine is the process of utilization of residual steam from the turbine or steam thermal energy transfer that had crashed into the turbine blade to produce rotation. Before the water is pumped into the boiler feedwater must be preheated until it reaches a certain temperature. The heating takes place by conduction by using hot steam removed (extracted) from the turbine.Retrieval of data taken at the turbine extraction system in the plant Barru. The data is in the form of temperature, pressure, flow rate, and volume as well as an image extraction turbine system. Then to develop a model in the form of a mathematical model extraction component. Further making and testing programs in the form of block Simulink simulation using MATLAB software. Perform data processing and discussion. From the simulation results will be obtained data and charts thermal efficiency of the turbine and the variation of the use of extraction will be conducted discussion. The conclusion of this study is variable extraction systems have been conducted using a manual counting of steam calculator software and a conventional formula. Variable values that have been obtained in the form= 14,95 kg/s,= 0,882 kg/s,= 4,764 kg/s,= 1,742 kg/s,= 52,905 kg/s,= -33,436 kg/s, Wp total = 15,957 kJ/kg, Qin = 2650,852 kJ/kg. Mathematical model extraction turbines are known in the form of the transfer function. The simulation results obtained with the use of thermal efficiency value of one to six extraction, with details Eks1 = 15,5%, Eks2 = 21,27%, Eks3 = 21,46%, Eks4 = 22%, Eks5 = 42%, Eks6 = 54%. From these results it is evident that the use of feedwater heater as a component of the extraction system is essential to improve the thermal efficiency of a steam power plant, especially in plant Barru.Keywords: Barru power plant, extraction, MATLAB Simulink, Thermal Efficiency. 
Analisis Pendekatan Empiris PGA (Peak Ground Acceleration) Pulau Bali Menggunakan Metode Donovan, MC. Guirre dan M.V. Mickey Emi Ulfiana; Said A. Rumy; Rian Pratama; Puji Ariy
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 2, No 2 (2018)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (502.015 KB) | DOI: 10.24198/jiif.v2i2.19730

Abstract

Salah satu faktor yang mempengaruhi nilai percepatan tanah maksimum atau Peak Ground Acceleration (PGA) adalah faktor lokal yang dapat berupa keadaan geologi atau karakteristik suatu wilayah. Hal ini menunjukkan adanya perbedaan nilai PGA pada suatu wilayah terkait perbedaan karakteristik geologi. Nilai PGA pada umumnya didapatkan dari hasil observasi rekaman akselerograf, namun dikarenakan keterbatasan alat akselerograf pada suatu wilayah, maka perhitungan PGA dilakukan dengan pendekatan empiris. Penelitian ini bertujuan untuk menganalisis rumus empiris Donovan, Mc. Guirre, dan M.V. Mickey terhadap kecocokan nilai PGA pulau Bali berdasarkan peta guncangan tanah, baik berupa Shakemap maupun peta Seismic Hazard pulau Bali. Penelitian menggunakan 738 data parameter gempa bumi dari katalog BMKG dan USGS pada rentang waktu Januari 1963 hingga Oktober 2017. Hasil penelitian menunjukkan bahwa dibandingkan dengan dua metode empiris lainnya, metode empiris Donovan adalah pendekatan empiris paling baik yang dapat digunakan untuk menghitung nilai PGA di Pulau Bali.
Tinjauan Hukum Ekonomi Syariah Terhadap Praktik Arisan Online Di Grup Whatsapp Danu, Danu Achmad Rifai; Rian Pratama; Lukisa Nur Fernanda; Nuryani, Nuryani; Nuryani, Ita Dwilestari
Jurnal Hukum Ekonomi Islam Vol. 7 No. 1 (2023): Jurnal Hukum Ekonomi Islam (JHEI)
Publisher : Asosiasi Pengajar dan Peneliti Hukum Ekonomi Islam Indonesia (APPHEISI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55577/jhei.v7i1.123

Abstract

One way to improve Muamalat's economy can be done by using Arisan. Arisan is a social phenomenon that occurs in various regions. Currently, Arisan has become a common activity carried out by the community, both in government offices, the business sector, households, schools, and even in places of worship. This study aims to examine the practice of online arisan, because there are several deficiencies in the online arisan system used so far. This study uses an empirical legal research method with a case study approach, which takes issues surrounding the practice of online arisan from the perspective of Islamic business law. Based on the results of this study, it can be concluded that online arisan involves elements of wakalah, but there is a conflict between the practice of online arisan and Islamic trade law (Qardh and Wakalah) because there is uncertainty (gharar) and elements of gambling (maysir), and there are significant debts and receivables. In Fiqh Muamalah, the term used is Riba Dayn. Therefore, the author proposes to abolish the two systems and replace them with a system based on sharia economic principles.AbstrakSalah satu cara untuk meningkatkan perekonomian Muamalat dapat dilakukan melalui penggunaan Arisan. Arisan adalah sebuah fenomena sosial yang terjadi di berbagai wilayah. Sekarang ini, Arisan telah menjadi kegiatan yang umum dilakukan oleh masyarakat, baik di kantor pemerintahan, sektor bisnis, rumah tangga, sekolah, dan bahkan di tempat ibadah. Penelitian ini bertujuan untuk mengkaji praktik arisan online, karena terdapat beberapa kekurangan dalam sistem Arisan online yang digunakan sejauh ini. Penelitian ini menggunakan metode penelitian hukum empiris dengan pendekatan studi kasus, yang mengambil masalah seputar praktik arisan online dari perspektif hukum bisnis Islam. Berdasarkan hasil penelitian ini, dapat disimpulkan bahwa arisan online melibatkan unsur wakalah, namun terdapat konflik antara praktik arisan online dan hukum dagang Islam (Qardh dan Wakâlah) karena terdapat ketidakpastian (gharar) dan unsur perjudian (maysir), serta terdapat utang piutang yang signifikan. Dalam Fiqh Muamalah, istilah yang digunakan adalah Riba Dayn. Oleh karena itu, penulis mengusulkan penghapusan kedua sistem tersebut dan menggantinya dengan sistem yang berlandaskan prinsip ekonomi syariah.
Co-Authors Apollo Apollo Danu, Danu Achmad Rifai Eko Kurnala Emi Ulfiana Lukisa Nur Fernanda Nuryani Nuryani Nuryani, Ita Dwilestari Puji Ariy Remigius Tandioga Said A. Rumy