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Riki Ruli A. Siregar
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INDONESIA
Power Plant
Published by Institut Teknologi Perusahaan Listrik Negara
ISSN : 23561513     EISSN : 2656372X     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
The Scientific Journal of "Power Plant" is a collection of scientific works by lecturers, researchers, and practitioners in the field of Mechanical Engineering that have been published since September 2012. This journal is the result of scientific work, research in the fields of Energy, Materials and Energy Conversion to contribute in writing scientific which will be useful for the application of science and technology, especially in the field of Mechanical Engineering.
Arjuna Subject : -
Articles 7 Documents
 1 
Search results for , issue "Vol 4 No 4 (2017): JURNAL POWER PLANT" : 7 Documents clear
ANALISA EFISIENSI BOILER DENGAN METODE HEAT LOSS SEBELUM DAN SESUDAH OVERHAUL PT. INDONESIA POWER UBP PLTU LONTAR UNIT 3 Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 4 No 4 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

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Abstract

One of the main components of the power plant is boiler. Boiler efficiency is very influential on the plant thermal efficiency. To maintain the efficiency of the boiler according to the design need to do maintenance activities, including overhaul. Sankey diagram to do with lack of analysis of the efficiency of the boiler. In this paper to analyze the efficiency of boiler power plant Banten 3 Lontar method of heat loss and Sankey diagram. The results of analysis of boiler efficiency before overhaul 82.78 and after overhaul 83.80%. Compared with the standard design of a drop in efficiency of the boiler before overhaul 10.:38% and 10.18% after overhaul activities. There are three elements to the largest percentage of heat loss which affects the efficiency of boilers that heat loss due to dry flue gas (6.01% -6.11%), heat loss moister fuels (4.9% -5.1%), and loss of heat due to the combustion of hydrogen (3.9% -5.0%). Also from the analysis obtained there are three elements that influence fuel to the formation of heat loss which affects the efficiency of the boiler, this is carbon (46% -52%), humadity moister (27% -33%) and oxygen (11% -13%). Maintenance and overhaul activities significantly affect the boiler efficiency.
ANALISIS KEKUATAN PIPA GLASS-FIBER REINFORCED EPOXY TERHADAP BEBAN IMPAK, BEBAN TEKUK, DAN BEBAN TEKAN DI JOB PERTAMINA-PETROCHINA EAST JAVA Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 4 No 4 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (23.464 KB)

Abstract

This study aims to determine the strength of the pipe Glass-fiber Reinforced Epoxy due to impact load, bending load, compression load and be able to analyze the failure potential of the shear stress on the pipe inner wall due to the fluid flow in it. Some test has been done, there are impact test with notched Charpy method (ISO 179-10), 3-point bending test (ASTM D 790-15), and the compression test (ASTM D 695-15). Volume fraction of Glass-fiber Reinforced Epoxy pipe for the Glass-fiber (E-glass) is ± 72.85% and for the Epoxy (Bisphenol A) is ± 27.15%. The orientation angle is 54.75 (continued) and the pipe was made by the helical filament winding method. The test results showed the impact strength is 190.10 ± 20.95 kJ / m2, the bending strength is 115.16 ± 5.50 N / mm2, and the compression strength is 259.48 ± 11.85 N / mm2. It is much larger than the calculation of shear stress on the wall of the pipe that assumed. In other word the pipe is safe from failure potential of the shear stress on the pipe inner wall due to the fluid flow in it.
ANALISIS PERFORMA KONDENSOR DI PT. INDONESIA POWER UJP PLTU LONTAR BANTEN UNIT 2 Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 4 No 4 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

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Abstract

Steam Power Plant Lontar Bantam is built on an area of 94 hectares with a capacity of three generating units where each unit is 315 MW, bringing the total power capacity of 945 MW of electricity generated. The electric power generated Lontar Steam Power will be channeled through the 150 kV transmission lines along the 22 kilometers to the substation Teluk Naga and along the 22 kilometers to the new substation Tangerang. Working from the condenser has an influence on the performance rankine cycle. Condenser otherwise good performance when the heat transfer process that occurs in the condenser is progressing well. Heat transfer process is influenced by several things such as cleanliness tube, the amount of refrigerant flowing water, cooling water inlet temperature. The performance of the condenser is calculated at the time before overhaul and after overhaul. Condition after overhaul should be better than before the overhaul, if there is a decrease in performance then you can add what steps can be done to overcome it. In this study to calculate the performance of the condenser using a standard ASME PTC 12.2 – 2010 (Revision Of PTC 12.2–1998 (R2007) Steam Surface Condensers and in research condenser performance results after the overhaul is better than the performance of the condenser before overhaul.
PENGARUH BEBAN PENDINGIN TERHADAP KINERJA MESIN PENDINGIN DENGAN REFRIGERANT R134a DAN MC134 Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 4 No 4 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (23.464 KB)

Abstract

Direct replacement method refrigerant in the engine manifold coolant HFC R134a with hydrocarbon widely developed. Retrofit refrigerant in cooling machine is not known with certainty the optimal pressure on the compressor, resulting in evaporation temperature and shows the performance of air conditioner. This study aims to determine the effect on the performance of the cooling load of air conditioner using refrigerant R134a and MC 134 on the filling pressure of the refrigerant which is optimal. The parameters were observed in this study was the effect of optimal pressure on kompessor, temperature condenser, evaporator temperature, the cooling load on the performance of refrigeration. Experimental research is still done on a laboratory scale. The result showed that if the cooling load increases will take effect on increasing the amount of heat absorbed by the evaporator, the evaporator heat discharged, reduced compressor work, the mass of refrigerant in the system and COP decreased. The use of hydrocarbon refrigerant MC 134 positive impact of heat absorbed the increase in the evaporator, the heat rise in dumped konsendor, COP system, the mass of refrigerant circulating in the system is reduced and the compressor work will decrease. Retrofit refrigerant hydrocarbon refrigerant R134a with MC 134 is worth considering for a vapor compression refrigeration system.
PENGARUH PENGGUNAAN LSHX TERHADAP PERFORMA MESIN PENDINGIN DENGAN LAJU ALIRAN MASSA YANG SAMA PADA KONDISI TRANSIENT Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 4 No 4 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (23.464 KB)

Abstract

There are three things that affect the development of of vapor compression refrigeration system : energy saving, non-ODP and non-GWP refrigerant charges. Keep in mind that the effect on GWP refrigerant and ODP substances occurs only when the substance is released into the atmosphere due to leakage in the refrigeration machine or replacement and recycling of refrigerant. Vapor compression refrigeration system is still used, as well as the type of refrigerant used predominantly of HCFC R22 and HFC R404A environmentally damaging and is scheduled to be removed. So to find an alternative refrigerant that is environmentally friendly and has a good refrigeration capacity such as by adding LSHX technology (Liquid Suction Heat Exchanger). LSHX technology is the use of heat exchanger equipment between the liquid line out the condenser and compressor inlet suction line. The present experimental used three refrigerant different i.e HFC R404A, as a comparison used to replace HCFC R22 and for replacement synthetic refrigerant used hydrocarbon R290 in the vapor compression refrigeration system with LSHX In transient conditions until steady conditions. The refrigeration system was charged with 2 kg of mass, 27oC ambient temperature, and for the calculation using software REFPROP 6. This research conducted in Refrigeration Workshop (Bengkel Pendingin) STT-PLN Jakarta. The results obtained showed the effect LSHX with same mass flow rate, trend the steady state temperature of evaporation HCFC R22 decreased of -16,7oC be -18,2oC, HFC R404A of -19,9oC be -22,2oC and HC R290 of -24,2oC be -27,6oC. Increase the COP, for HCFC R22 from 3,29 to 3,39, HFC R404A from 2,76 to 2,85 and HC R290 from 3,43 to 3,50.
RANCANG BANGUN METODE PEMBELAJARAN PRAKTIKUM CAD/CAM DENGAN MENGGUNAKAN PERANGKAT LUNAK GRATIS Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 4 No 4 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

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Abstract

Computer-Aided Design (CAD) is a form of automation that helps designers to improve drawings, specifications, and design-related elements that use special graphical effects and computer program computations. The CAD system is run through PC for 2D design and modeling as well as drafting process, then executed and integrated with CAM (Computer Aided Manufacture) system adapted to CNC (Computer Numeric Control) format to be used. Inventor Software is one of the many CAD software that has many advantages, so it is unthinkable to design the learning method of CAD / CAM Practicum with combination of Autodesk Inventor Software with Hardware Machine CNC Roland EGX-350. The study was conducted on the even semester of the 2015/2016 school year at STT-PLN Jakarta. A more specific object is a student who takes the CAD / CAM course. The end result of the study, shows that from the respondents stated that the design by using AutoCesk AutoCAD Software has a level of convenience 67.62% (Easy). While using AutoDesk Inventor respondents stated having ease of 82.2% (Very Easy).
STRATEGI PENGEMBANGAN DAN PELAYANAN INDUSTRI OPTIK UNTUK MENINGKATKAN MINAT PELANGGAN AGAR KEMBALI (STUDI OPTIK XYZ DI BEKASI) Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 4 No 4 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (23.464 KB)

Abstract

Untuk mengetahui perbaikan dari pengaruh kualitas layanan, nilai yang dirasakan, atribut teknologi untuk mencapai kepuasan pelanggan sehingga ada niat pembeli kembali, menentukan kriteria faktor yang mempengaruhi prioritas utama agar ditingkatkan kualitas layanannya untuk mendekati harapan pelanggan ditentukan melalui hasil analisis IPA sehingga dapat disusun strategi pengembangannya terhadap industri optik. Metode yang digunakan penelitian ini adalah analisis deskriptif, uji validitas, uji reliabilitas, uji kecukupan data, Importance Performance Analysis (IPA), indeks kepuasan, analisis gap, analisis SEM dan analisis SWOT. Karakteristik pelanggan optik xyz dari 110 responden sebagian besar adalah berusia 31- 40 tahun sebanyak 56 orang berjenis kelamin perempuan, 29 orang memiliki pekerjaan sebagai karyawan swasta, 58 orang datang ke optik bertujuan membeli kacamata, dan dalam 2 tahun terakhir 2x kali kedatangan sebanyak 49 orang. Dari Hasil uji hipotesis kualitas layanan terhadap kepuasan pelanggan, atribut teknologi terhadap kepuasan pelanggan, atribut teknologi terhadap minat pelanggan kembali, signifikan yang berarti mempunyai pengaruh langsung, hasil nilai yang dirasakan pelanggan terhadap kepuasan pelanggan, kualitas layanan terhadap minat pelanggan untuk kembali, kepuasan pelanggan terhadap minat pelanggan agar kembali tidak signifikan yang berarti tidak memiliki pengaruh langsung. Kesenjangan atau gap dari hasil pengukuran persepsi dan ekspektasi sebesar -0,19 bernilai negatif, maka konsumen tergolong tidak puas. Hasil analisis IPA pada kuadran I adalah optik terletak di lokasi yang strategis, tempat parkir yang memadai dan aman, ruang pelayanan yang nyaman, kesiapan petugas untuk melayani customer dan menginformasikan pelanggan tentang kepastian waktu penyelesaian jasa yang menunjukkan atribut dimensi kualitas pelayanan yang sangat penting untuk diperbaiki. Dengan analisis SWOT diantaranya : setiap pembukaan cabang baru sekiranya selalu memperhatikan lokasi yang strategis untuk posisi optik dan tempat parkir jika membuka cabang ruko, selalu perhatian dengan lingkungan usaha, koleksi barang dengan harga terjangkau harus tetap tersedia agar menjangkau semua kalangan, membuat promosi iklan yang lebih menarik, pengembangan standar pelayanan, pengembangan standard operating procedur / SOP layanan pelanggan.

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