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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 102 Documents
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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

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

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.
ANALISA PROPERTIES MATERIAL PIPA ECONOMIZER PLTU JATENG 2 ADIPALA 1 X 660 MW Martin Fatah; Dhami Johar Damiri; Halim Rusjdi; rafsanjani rafsanjani
JURNAL POWERPLANT Vol 6 No 2 (2018): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/powerplant.v6i2.301

Abstract

A leaking of welding joint in the economizer tube was observed at PLTU Adipala. The tube was just operated for 2 months (1440 hours) since the commissioning. The leaking might be caused by the aggressive working environment of the tube. This aggressive environment might also decrease the performance of material properties. The objective of the research is to investigate the tube material properties after 2 months operation. The material properties was analysed using mechanical, visual and metallography test, i.e. tensile test, hardness test, optical microscope as well as SEM/EDX. It is observed that the yield tregth and UTS of the tube are within SA210 C carbon steel standard. Hardness of the tube is slightly lower than SA210 C standard.. Visual inspection both on fireside and waterside shows corrosion attack. SEM shows pitting corrosion on the inner surface. However, EDX doesn’t show any corrosive species in the inner surface of the tube.
ANALISIS PENGARUH PENURUNAN TEMPERATUR LMTD TERHADAP UNJUK KERJA HRSG PADA PLTGU Prayudi Suparmin
JURNAL POWERPLANT Vol 6 No 2 (2018): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/powerplant.v6i2.393

Abstract

Pembangkit Listrik Tenaga Gas dan Uap (PLTGU) Unit Pembangkitan Semarang salah satu jenis pembangkit yang diharapkan menopang kebutuhan energi listrik. Heat Recovery Steam Generator (HRSG) peralatan yang memiliki prinsip kerja seperti boiler, sumber energi dari gas buang turbin gas yang memiliki temperatur tinggi. Permasalahan yang timbul pada HRSG adalah terjadinya kebocoran pipa yang beakibat pada efisiensi HRSG. Dengan Overhaul yaitu mengganti pipa, pembersihan dinding tube, dan isolasi HRSG, dan pluging tube, maka overhoul berdampak pada penurunan temperatur rata-rata logaritmik (LMTD) dan kenaikan panas Q HRSG. Penelitian ini dilakukan untuk menganalisis dampak penurunan temperatur LMTD terhadap unjuk kerja HRSG sebelum dan sesudah overhaul. Metode penelitian yang digunakan adalah metode deskriptip dengan melakukan studi kasus di PLTGU Tambaok Lorok Unit 2 Semarang. Data-data yang diperlukan dalam penelitian diambil langsung dari CCR PLTGU Tambak Lorok Unit 2 Semarang. Dari hasil analisis diperoleh hasil bahwa setelah kegiatan overhoul mengakibatkan terjadinya penurunan perbedaan temperature LMTD, dan menaikan jumlah panas pada HRSG. Terjadinya penurunan perbedaan temperature LMTD HRSG akibat kegiatan overhoul akan mengakibatkan efisiensi HRSG meningkat, sedangkan kenaikan panas Q HRSG setelah overhoul akan meningkatkan efisiensi HRSG.
Pemeliharaan Preventif Pompa Vakum STG PLTGU Unit 1 Tambak Lorok Semarang Win Alfalah
JURNAL POWERPLANT Vol 6 No 2 (2018): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/powerplant.v6i2.397

Abstract

To increase the efficiency of condensation on the PLTGU (Gas and Steam Power Plant) a low pressure in condenser is needed, so steam moves faster toward the condenser because high pressure difference. To reduce pressure in the condenser, a vacuum pump is used. Vacuum pump engine maintenance in this study is in form of preventive maintenance (repairs carried out with the schedule scheduled by the component factory and/or by user experience), etc. This is because maintenance that is considered to be affordable both in terms of cost and field implementation in our country for power plants currently is preventive maintenance. What will be discussed here is preventive maintenance at the vacuum pump unit 1 of PT Indonesia Power PLTGU Tambak Lorok, Semarang. This discussion covers details of the vacuum pump preventive maintenance of each components, causal relationship of damage to causes, detailed analysis of the damage causes to vacuum pump components, etc.
PENINGKATAN SIFAT MEKANIK MATERIAL RING PISTON NON ORIGINAL MESIN PADA MESIN DIESEL MITSUBISHI-MAN 18 V52/55A PLTD TELLO UNIT 1 Win Alfalah
JURNAL POWERPLANT Vol 6 No 2 (2018): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/powerplant.v6i2.399

Abstract

The purpose of this study, to determine the characteristics of piston ring material compression Tello diesel engine. Non original (NOM) diesel engine piston rings are heat treated with a holding time of 1.2 and 3 hours then hardness test, metallograhic test and chemical composition test.From the results of these test, compared with the results of the original diesel engine piston ring (OM) and piston ring (NOM) tests which were not subjected to heat treatment. The results obtained show a significant different between the OM piston ring and NOM piston ring with a hold time of 1. 2 and 3 hours especially in the hardness value. For OM and NOM piston ring elements 0f 77.5% and 89.2%, while carbon elements have the same value of >4 %. Whereas the results of microstructure testing show that the shape of graphite from several materials is different, both in form and size of graphite. For the hardness of the NOM piston ring with a hold tome of 3 hours the hardness value of 301 HV approaches the OM piston ring of 309 HV.
KOMPARASI METODE ESTIMAS DEBIT AIR CHILLER Nofirman Firdaus
JURNAL POWERPLANT Vol 6 No 2 (2018): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/powerplant.v6i2.411

Abstract

Pada umumnya tidak semua chiller dilengkapi oleh alat ukur debit air (Flow meter) yang permanen untuk mengukur debit air kondensor dan evaporator. Hal ini dikarenakan mahalnya biaya investasi untuk pengadaan alat tersebut. Dikarenakan hal ini, dalam beberapa tahun terakhir dikembangan alat ukur virtual untuk “mengukur” debit air pada kondensor dan evaporator. Alat ukur virtual ini dikenal dengan sebutan virtual flow meter (VFM). Untuk itu penelitian ini akan melakukan studi komparasi metode VFM yang menggunakan model kesetimbangan energi. Studi komparasi bertujuan untuk mengetahui keakuratan masing-masing metode VFM yang ada.
PENGARUH KINERJA DOSEN TERHADAP KEPUASAN MAHASISWA Arief Suardi Nur Chairat; Utami Wahyuningsih
JURNAL POWERPLANT Vol 6 No 2 (2018): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/powerplant.v6i2.422

Abstract

Perhatian kepuasan atau ketidakpuasan konsumen (mahasiswa) semakin besar. Semakin banyak pihak yang menaruh perhatian terhadap hal ini. Salah satu pihak yang banyak berhubungan langsung dengan kepuasan dan ketidakpuasan di perguruan tinggi adalah mahasiswa. Persaingan yang semakin ketat, banyaknya perguruan tinggi yang terlibat dalam pemenuhan kebutuhan dan keinginan mahasiswa menyebabkan setiap perguruan tinggi menempatkan orientasi pada kepuasan mahasiswa sebagai tujuan utama sehingga semakin banyak pihak yang menaruh perhatian terhadap kepuasan dan ketidakpuasan mahasiswa di peguruan tinggi. Adanya sedikit ketidakpuasan mahasiswa terhadap dosen.dengan munculnya 2 skor yang terkecil pada point pertanyaan 3 dan 9 maka, dosen dapat lebih memperbaiki lagi kinerjanya terutama menambah diskusi dalam setiap tatap muka dan memperbaharui bentuk pengajaran agar menambah minat dan semangat belajar mahasiswa dengan keaktifan dosen dan mahasiswa berimbang dalam kuliah, sehingga tercipta nilai maksimal dalam kualitas pelayanan terhadap mahasiswa.
OPTIMALISASI RADIUS SERVER SEBAGAI SISTEM OTENTIKASI DAN OTORISASI UNTUK PROSES LOGIN MULTI APLIKASI MIKHMON MENGGUNAKAN USER MANAGER DI MIKROTIK Sabar Hanadwi putra
JURNAL POWERPLANT Vol 6 No 2 (2018): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/powerplant.v6i2.452

Abstract

ABSTRACT The development and application of science and technology has a very important impact on various aspects of activities which include wireless communication. In daily life various security measures can be carried out through communication devices used by managers, when managing users as a step to integrate several different applications can be done by optimizing the server radius as the authentication and authorization stages for multi-application login process called mikhmon. this is to implement an authentication and authorization system for the multi-application mikhmond login process by optimizing the use of the radius server. The results of this study indicate that in testing the radius server optimization process as an authentication system and this authorization can make users only have one single account for several different applications and a time base voucher results show that the user cannot log in again when the voucher time is up. Keywords: Mikrotik, Mikhmon, Usermanager, Otentikasi,Otorisasi.

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