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All Journal Jurnal Teknik Mesin SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin
Najamudin Najamudin
Universitas Bandar Lampung
Automotive Engineering Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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PENGARUH TEKANAN MASUK DAN TEKANAN KELUAR TURBIN TERHADAP DAYA PENGGGERAK GENERATOR Najamudin Najamudin
JURNAL TEKNIK MESIN Vol 6, No 2 (2019): April
Publisher : Universitas Bandar Lampung

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Abstract

The steam turbine is a prime mover that converts the vapor potential energy to kinetic energy and is subsequently converted to mechanical energy in the form of turbine shaft rotation. Turbine shaft, directly connected with the actuated mechanism, steam turbine can be used in various industrial fields or power plants. Generally, the steam turbine consists of a stationary part called a stator or turbine housing and a rotating part called a rotor. In the stator there is a nozzle, where the steam is exposed inside so that its speed rises. While on the rotor there are moving blades and discs that are the hilt of the moving blade. Because the shape of the motion blade is made curved in such a way that the change in vapor momentum flowing between the blades will cause a force acting on the blade curve so that it is pushed. This drive is subsequently transmitted by the disc and resulted in a spin on the turbine shaft. Power plants in Indonesia use generators to generate electricity. For that required the engine as a prime mover one of which is a steam turbine, to meet the above needs, then the problem is how to analyze the power generated steam turbine based on the influence of inlet pressure and turbine outlet pressure to generator generator power to fit Planning specifications of the turbine steam that can be used as a driving generator in a steam power plant.
ANALISA PENGARUH KAMPUH LAS BERBAHAN ALUMINIUM TERHADAP SIFAT MEKANIS PADA LAS ASETILIN Najamudin Najamudin; Frendiantoro Frendiantoro
JURNAL TEKNIK MESIN Vol 5, No 1 (2017): Oktober
Publisher : Universitas Bandar Lampung

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Telah dilakukan proses pengujian dengan meterial alumunium yang dilas dengan beda kampuh las yaitu X, V, dan I. Dimana pengujian ini membandingkan hasil lasan yang memakai kampuh yang berbeda yang mengakibatkan mempengaruhi sifat-sifat mekanik dari alumunium tersebut. Pengelasan (Welding) adalah salah satu teknik penyambungan  logam  dengan  cara  mencairkan  sebagian logam induk dan logam pengisi. Dari definisi tersebut terdapat 2 kata kunci untuk menjelaskan definisi pengelasan yaitu mencairkan sebagian  Iogam dan logam pengisi. Berdasarkan hal tersebut maka dilakukan penelitian ini yang bertujuan untuk mengetahui pengaruh yang ditimbulkan hasil pengelasan beda kampuh las pada alumunium terhadap ketangguhan uji impact (carpy) dan struktur mikro. Nilai uji impact dan struktur mikro rata-rata spesimen adalah :BM 2,2472 joul/mm2, Nilai uji impact rata-rata spesimen dengan kampuh V 2,6300 joul/mm2, Nilai uji impact rata-rata spesimen dengan kampuh X 2,6449 joul/mm2, Nilai uji impact rata-rata spesimen dengan kampuh I 2,8400 joul/mm2, Dan hasil analisis struktur mikro yang didapat Al (berwarna putih ), Mg (berwarna keabu-abuan), Si (bewarna abu-abu) dan Cu (berwarna abu-abu agak kemerahan) dari setiap speseimen Base Material, has dan las pada kampuh V, X dan I.
CARA MENENTUKAN DAYA YANG DIGUNAKAN AIR CONDITIONING (AC) UNTUK KENDARAAN Najamudin Najamudin
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 12, No 1 (2018): SINTEK JURNAL
Publisher : University of Muhammadiyah Jakarta

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Abstract

Vital transportation facilities for the community to facilitate and accelerate human movement from bed more quickly, safely and comfortably. Buses with large capacity with passengers over 50 people operating between cities or between provinces require specific performance in order to provide security and comfort for passengers on the way. Bus transports between cities and between provinces are equipped with air conditioning  system (AC) and some are not. In Buses that use air refreshments there is also no use of the standard main components installed from the manufacturer; such as compressors, condensers, expansion valves and others. Compressors in the air refreshing system can be analogous to the heart of the human body, which serves to suck and pump coolant (refrigerant) that circulates in the system. In this study found that there are several buses that compressor is not a standard compressor from the manufacturer. For that purpose, calculations are mainly carried out on cooling loads, achievement coefficients and compressor power.
Co-Authors Frendiantoro Frendiantoro