Desain Compact Heat Exchanger Tipe Plate Fin Sebagai Pendingin Motor Pada Boiler Feed Pump
Submission Date: 2013-11-11 09:59:49
Accepted Date: 2013-12-01 00:00:00
Abstract
Listrik meringankan pekerjaan manusia. Dalam mengalirkan listrik pembangkit listrik tenaga uap menggunakan motor listrik sebagai starting awal. Untuk menjaga motor listrik tetap bekerja maksimal diperlukan proses pendinginan. Selama ini motor listrik hanya didinginkan menggunakan fan, namun masalah lain muncul ketika udara luar lembab atau saat udara mengandung debu/partikulat. Hal ini menyebabkan dinding motor listrik ditempeli oleh debu/partikulat yang akan menyebabkan panas tidak bisa keluar dari motor, sehingga terjadi overheating dan motor mudah mengalami kerusakan. Tujuan dari penelitian ini adalah merancang sebuah alat pendingin motor dengan menggunakan alat penukar panas compact tipe plate fin. Pada penelitian ini data operasi diperoleh dari pembangkit listrik tenaga uap dan perancangan desain alat penukar panas berdasarkan spesifikasi yang ada pada buku Kays and London. Setelah dihitung akan dibandingkan nilai UALMTD dengan UAdesain. Variasi pada penelitian ini adalah beban yang harus didinginkan oleh heat exchanger fungsi temperatur masuk dan keluar dari heat exchanger. Hasil dari penelitian diperoleh dimensi plate fin heat exchanger yang memiliki spesifikasi sesuai desain permukaan 5.3 dari buku Kays and London dengan panjang 1,556 m, lebar 0,897 m, dan tinggi 1,299 m. Sedangkan nilai UALMTD sebesar 17,364 kW/K dan UAdesain sebesar 17,599 kW/K. Kesimpulannya pada analisa performa terhadap variasi beban yang harus didinginkan yaitu semakin tinggi beban yang didinginkan semakin tinggi pula nilai effectiveness. Hal ini terlihat pada beban 105 % dengan efektivitas 0,8845.
Keywords
desain; plate fin; ∆TLMTD; performa heat exchanger
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