3 TURBIN GASTURBIN GAS
Tujuan Pembelajaran:
Tujuan Pembelajaran:
1.
1. Siswa Mampu memahami cara kerja turbin Gas Siswa Mampu memahami cara kerja turbin Gas
2.
2. Siswa mampu menjelaskan cara kerja turbin gas Siswa mampu menjelaskan cara kerja turbin gas
3.
3. Siswa mampu menjelaskan proses-proses kerja pada Siswa mampu menjelaskan proses-proses kerja pada
turbin gas
turbin gas
4.
4. Siswa mampu menyebutkan komponen-komponen turbin Siswa mampu menyebutkan komponen-komponen turbin
gas beserta fungsinya.
gas beserta fungsinya.
A.
A. PendahuluanPendahuluan
Gas-turbine engine
Gas-turbine engine adalah suatu pesawat yang memanfaatkan gas sebagai fluidaadalah suatu pesawat yang memanfaatkan gas sebagai fluida untuk memutar turbin dengan pembakaran internal. Didalam turbin gas energi kinetik untuk memutar turbin dengan pembakaran internal. Didalam turbin gas energi kinetik dikonversikan menjadi energi mekanik melalui udara bertekanan yang memutar roda dikonversikan menjadi energi mekanik melalui udara bertekanan yang memutar roda turbin sehingga menghasilkan daya. Sistem turbin gas yang paling sederhana terdiri turbin sehingga menghasilkan daya. Sistem turbin gas yang paling sederhana terdiri dari tiga komponen yaitu kompresor, ruang bakar dan turbin gas.
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dan memutar beban lainnya seperti generator listrik, dll. Setelah melewati turbin ini dan memutar beban lainnya seperti generator listrik, dll. Setelah melewati turbin ini gas tersebut akan dibuang keluar melalui saluran
gas tersebut akan dibuang keluar melalui saluran buang (buang (exhaust exhaust ).).
Secara umum proses yang terjadi pada suatu sistem turbin gas adalah sebagai Secara umum proses yang terjadi pada suatu sistem turbin gas adalah sebagai berikut:
berikut: 1.
1. Pemampatan (Pemampatan (compression compression ) udara di ) udara di hisap dan dimampatkanhisap dan dimampatkan 2.
2. Pembakaran (Pembakaran (combustion combustion ) bahan bakar ) bahan bakar dicampurkan ke dalam ruang bakardicampurkan ke dalam ruang bakar dengan udara kemudian di bakar.
dengan udara kemudian di bakar. 3.
3. Pemuaian (Pemuaian (expansion expansion ) gas hasil ) gas hasil pembakaran memuapembakaran memuai dan mengalir i dan mengalir ke luar melaluike luar melalui nozel (
nozel (nozzle nozzle ).). 4.
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1.
1. Air Air Inlet Inlet SectionSection. Berfungsi untuk menyaring kotoran dan debu yang terbawa. Berfungsi untuk menyaring kotoran dan debu yang terbawa dalam udara sebelum masuk ke kompresor. Bagian ini terdiri
dalam udara sebelum masuk ke kompresor. Bagian ini terdiri dari:dari: 1.
1. Air Inlet Air Inlet Housing Housing , merupakan tempat udara masuk dimana didalamnya terdapat, merupakan tempat udara masuk dimana didalamnya terdapat peralatan pembersih udara.
peralatan pembersih udara. 2.
2. Inertia Separator Inertia Separator , berfungsi untuk membersihkan debu-debu atau partikel yang, berfungsi untuk membersihkan debu-debu atau partikel yang terbawa bersama udara masuk.
terbawa bersama udara masuk. 3.
3. Pre-Filter Pre-Filter , merupakan penyaringan udara awal yang dipasang pada inlet house., merupakan penyaringan udara awal yang dipasang pada inlet house. 4.
4. Main Filter Main Filter , merupakan penyaring utama yang terdapat pada bagian dalam inlet, merupakan penyaring utama yang terdapat pada bagian dalam inlet house, udara yang telah melewati penyaring ini masuk ke dalam kompresor house, udara yang telah melewati penyaring ini masuk ke dalam kompresor aksial.
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6.
6. Cross Fire Tubes Cross Fire Tubes , berfungsi untuk meratakan nyala api pada semua combustion, berfungsi untuk meratakan nyala api pada semua combustion chamber.
chamber. 7.
7. Flame Detector Flame Detector , merupakan alat yang dipasang untuk mendeteksi proses, merupakan alat yang dipasang untuk mendeteksi proses pembakaran terjadi.
pembakaran terjadi. 4.
4. Turbin SectionTurbin Section. Turbin section merupakan tempat terjadinya konversi energi kinetik . Turbin section merupakan tempat terjadinya konversi energi kinetik menjadi energi mekanik yang digunakan sebagai penggerak compresor aksial dan menjadi energi mekanik yang digunakan sebagai penggerak compresor aksial dan perlengkapan lainnya. Dari daya total yang dihasilkan kira-kira 60 % digunakan perlengkapan lainnya. Dari daya total yang dihasilkan kira-kira 60 % digunakan untuk memutar kompresornya sendiri, dan sisanya digunakan untuk kerja yang untuk memutar kompresornya sendiri, dan sisanya digunakan untuk kerja yang dibutuhkan. Kompon
dibutuhkan. Komponen-komponen-komponen pada turbin en pada turbin section adalah sebagai berikut :section adalah sebagai berikut : 1.
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BAB
BAB
4
4
MOTOR LISTRIK MOTOR LISTRIK
Tujuan Pembelajaran Tujuan Pembelajaran :: 1.
1. Siswa mampu Memahami Konsep Motor listrik (GayaSiswa mampu Memahami Konsep Motor listrik (Gaya elektromagnetik)
elektromagnetik) 2.
2. Siswa dapat menjelaskan cara kerja motor listrik Siswa dapat menjelaskan cara kerja motor listrik 3.
3. Siswa memahami konstruksi motor listrik Siswa memahami konstruksi motor listrik 4.
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Bagian yang menuju kutub utara kawat konduktor dan yang menuju kutub Bagian yang menuju kutub utara kawat konduktor dan yang menuju kutub selatan menerima gaya dari arah vertikal berlawanan sehingga kawat konduktor selatan menerima gaya dari arah vertikal berlawanan sehingga kawat konduktor berputar. Ini disebut prinsip putaran motor.
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E.
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3.
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