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KOMPRESSOR KOMPRESSOR Alat yang dipakai untuk menaikkan tekanan udara dengan cara memampatkan volumenya. Dilihat dari cara kerjanya, ada beberapa tipe kompressor: 1. Kompressor torak a. kerja tunggal b. kerja ganda 2. Kompressor Rotary Kompresor yaitu pesawat/ mesin yang berfungsi untuk memampatkan atau menaikkan tekanan atau memindahkan fluida gas dari suatu tekanan statis rendah ke keadaan tekanan statis yang lebih tinggi Example of Centrifugal Flow Intake airflow is being forced around the outside perimeter of the engine. Centrifugal Compressor Airflow being forced around body of engine Example of Axial Flow Intake airflow is forced down the center shaft of the engine. Multistage Axial Compressor Center Shaft Example of Combination Flow Intake Air Flow Axial Compressor Centrifugal Compressor Intake air flow is forced down the center shaft initially by axially compressor stages, and then forced against engine perimeter by the centrifugal compressor. Major Components of Interest Compressor Axial Centrifugal Turbine Axial Radial Axial Compressor Centrifugal Compressor Centrifugal Compressor Operation Centrifugal compressors rotate ambient air about an impeller. The impeller blades guide the airflow toward the outer perimeter of the compressor assembly. The air velocity is then increased as the rotational speed of the impeller increases. Dynamic Surge Occurs when the static (inlet) air pressure rises past the design characteristics of the compressor. When there is a reversal of airflow from the compressor causing a surge to propagate in the engine. Essentially, the flow is exhausted out of the compressor, or front, of the engine. Result, is the compressor no longer able to exhaust as quickly as air is being drawn in and a bang occurs. http://www.turbosolve.com/index.html Compressor Inlet Turbine Exit Tipe kompressor ejector centrifugal- turbo axial-turbo vane liquid ring screw rotary blower labyrinth diaphragm rotary reciprocating trunk crosshead free- piston single-rotor double-rotor helical displacement compressor dynamic compressor Components of air 21% other gasses 78% nitrogen oxygen 1% Tekanan Pressure (p) = Force (F) Area (A) 1 Pascal (Pa) 1 Newton (N) 1 m (A) = Equivalents 105 Pa = 1 bar 1 MPa = 10 bar Gauge pressure 1 bar = 14,5 psi(g) 1 hPa = 0,001 bar 1 bar = 10197 mmWC 1 bar = 750,062 Torr A = 1 m2 TURBO KOMPRESSOR INTERCOOLER KOMPRESSOR CENTRIFUGAL KOMPRESSOR ROTARY ROTARY ROTOR SCREW KOMPRESSOR symmetrical profile asymmetric profile The world renowned Advantages of CompAir screw compressors Compressed air generation with two rotating screws FAMILY SCREW COMPRESSOR fluid filter hot fluid compressed air fluid-air mixture cooled fluid Construction: SCREW KOMPRESSOR KOMPRESSOR BOLAK BALIK SATU TINGKAT (IDEAL) Salah satu jenis kompressor bolak balik yang sederhana adalah adalah kompressor dengan seluruh kompressinya berlangsung dalam satu selinder yang biasa disebut dengan kompressor satu satu tingkat. Dalam hal kompressor ideal diasumsikan bahwa: 1. Tidak ada kerugian tekanan pada katup masuk dan katup buang 2. Tekanan pada langkah isap dan langkah buang adalah konstan 3. Kompressor tidak mempunyai ruang rugi 4. Seluruh proses kompressi berlangsung pada satu selinder Reciprocating Compressor System = Control Volume which contains the gas being compressed. IB MOTION Body # C, connecting rod tload Rotation Body # B, the crank (partially hidden) Body # A, the flywheel part of the load A C MC Inlet Outlet Valve Closed Valve Open KOMPRESSOR TORAK Reciprocating compressors single / two stage Note the difference: - single / two stage - single acting / double acting Installation: - portable - stationary Application: (single stage) - trade 10 bar - boosters 35 bar Applications: trade, up to 15 bar high pressure, up to 35 bar Reciprocating compressors two stage inter- cooling top dead centre 1 bar absolute 8 bar Upper piston clearance (dead space) KOMPRESSOR TORAK Double-acting with crosshead Application: High pressure, up to 1000 bar in combination with screw compressors. Compression of gas KOMPRESSOR TORAK KERJA GANDA Minimizing Compressor Work 2 2,1rev inw vdP = }Minimizing Compressor Work (Open System + Ideal Gas) Three compression processes: Isentropic (no cooling):Pvk = Constant Polytropic (some cooling): Pvn = Constant Isothermal (maximum cooling): Pv =Constant ( )w kR T TkkRTkPPcomp inkk,( )= = |\

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(((2 1 1 2111 11( )w nR T TnnRTnPPcomp innn,( )= = |\

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(((2 1 1 2111 11w RT PPcomp in ,ln =21w vdPrev = }12Pv RTRTvP==Distribusi Compresor Compressor Area Tanki Angin Manometer Line Produksi Pemakaian Compresor 1.Snaper (pengencangan baut) 2. Hoist 3. Base Roller 4. Spray angin 5. Spray Gun (anti rust)