ANALISIS PENINGKATAN KINERJA HEAT EXCHANGER DENGAN MERUBAH SISTEM AIR PENDINGIN SIKLUS TERBUKA MENJADI SIKLUS TERTUTUP MENGGUNAKAN COOLING TOWER UNTUK MENJAGA KESTABILAN SUPLAI DAYA PLTA KOTA PANJANG

AFFANDI, HERY (2019) ANALISIS PENINGKATAN KINERJA HEAT EXCHANGER DENGAN MERUBAH SISTEM AIR PENDINGIN SIKLUS TERBUKA MENJADI SIKLUS TERTUTUP MENGGUNAKAN COOLING TOWER UNTUK MENJAGA KESTABILAN SUPLAI DAYA PLTA KOTA PANJANG. S1 thesis, Universitas Mercu Buana Jakarta.

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Abstract

There are two types of cooling water system based on cycle , that is open cycle system (once through) and closed cycle system (recirculating-cooling tower). For open cycle systems is not equipped with cooling towers, otherwise in closed cycle systems (recirculation) there is no need for intake fitted with filters, just with one simple filter. The cooling water system of PLTA Kota Panjang is an open cycle with one of its equipment is heat exchanger. To determine the performance of heat exchanger in the open cycle can be done by calculating the overall heat transfer coefficient and the value of the fouling factor on the heat exchanger before and after maintenance (cleaning). With decreasing of the heat exchanger performance, it can be affect to the other operating parameters on the PLTA Kota Panjang Unit 2, that is temperature of upper bearing guide and thrust bearing will be reaching the alarm temperature, and the power output Unit 2 PLTA Kota Panjang should be decreasing and then the heat exchanger should be maintained (cleaned). Based on the heat exchanger performance analysis, the performance heat exchanger before maintained (cleaned) has e result for overall heat transfer coefficient is 2,696 kW / m2K, fouling factor value is 0,00036971 m2.oC/W and output power is 35 MW. The performance heat exchanger after maintained (cleaned) has a result for overall heat transfer coefficient is 6,103 kW / m2K, fouling factor value is 0,000162685 m2.oC/W and power output is 38 MW. In order for the performance of the heat exchanger to be the same as after maintained (cleaned), it is necessary to analyze the performance of the heat exchanger by closed cycle using the cooling tower. Based on the heat exchanger performance analysis, the values of overall heat transfer coefficient is 5,645 kW / m2K with the value of the fouling factor is 0,000176 m2.oC/W, and the heat transfer by air and water in the cooling towers required is 2294,3 kW. Keywords: Fouling factor, overall heat transfer coefficient, heat transfer, cooling tower, open cycle, closed cycle, power output Berdasarkan siklusnya sistem air pendingin terbagi dua jenis yaitu sistem siklus terbuka (once through) dan sistem siklus tertutup (recirculation – cooling tower). Untuk sistem air pendingin siklus terbuka tidak dilengkapi dengan menara pendingin (cooling tower), sebaliknya pada sistem siklus tertutup (resirkulasi) tidak dibutuhkan intake yang dipasangi lebih dari satu saringan. Sistem air pendingin PLTA Kota Panjang merupakan siklus terbuka dengan salah satu peralatannya adalah heat exchanger. Untuk mengetahui kinerja heat exchanger pada siklus terbuka dapat dilakukan dengan menghitung koefisien perpindahan panas keseluruhan dan nilai fouling factor pada heat exchanger sebelum dan sesudah dibersihkan. Penurunan kinerja heat exchanger dapat mempengaruhi parameter operasi lainnya pada Unit 2 PLTA Kota Panjang yaitu suhu upper guide bearing dan suhu thrust bearing meningkat bahkan mencapai suhu alarm, jika hal ini terjadi maka daya output Unit 2 PLTA Kota Panjang harus diturunkan dan heat exchanger tersebut harus dipelihara (dibersihkan). Dari hasil analisis perhitungan kinerja heat exchanger sebelum dibersihkan didapat nilai koefisien perpindahan panas keseluruhan 2,696 kW/m2K, nilai fouling factor 0,00036971 m2.oC/W dan daya output 35 MW, sedangkan kinerja heat exchanger setelah dibersihkan didapat nilai koefisien perpindahan panas keseluruhan 6,103 kW/m2K, nilai fouling factor 0,000162685 m2.oC/W dan daya output 38 MW. Agar kinerja heat exchanger sama dengan setelah dibersihkan maka perlu dilakukan analisis kinerja heat exchanger dengan siklus tertutup menggunakan cooling tower yang airnya berasal dari water treatment. Dari hasil analisis didapat nilai koefisien perpindahan panas keseluruhan 5,645kW/m2K dengan nilai fouling factor 0,000176 m2.oC/W sehingga kebutuhan cooling tower dengan laju penyerapan atau pembuangan kalor oleh udara sebesar dan juga kapasitas penyerapan kalor/heat transfer maximum dari cooling tower sebesar 2294,3 kW. Kata kunci : Fouling factor, koefiesien perpindahan panas keseluruhan, heat transfer, cooling tower, siklus terbuka, siklus tertutup, daya output

Item Type: Thesis (S1)
Call Number: ST/13/19/029
NIM: 41317110091
Uncontrolled Keywords: Fouling factor, koefiesien perpindahan panas keseluruhan, heat transfer, cooling tower, siklus terbuka, siklus tertutup, daya output
Subjects: 000 Computer Science, Information and General Works/Ilmu Komputer, Informasi, dan Karya Umum > 000. Computer Science, Information and General Works/Ilmu Komputer, Informasi, dan Karya Umum > 006 Special Computer Methods/Metode Komputer Tertentu > 006.3 Artificial Intelligence/Kecerdasan Buatan > 006.31 Machine Learning/Pembelajaran Mesin
000 Computer Science, Information and General Works/Ilmu Komputer, Informasi, dan Karya Umum > 020 Library and Information Sciences/Perpustakaan dan Ilmu Informasi > 025 Operations, Archives, Information Centers/Operasional Perpustakaan, Arsip dan Pusat Informasi, Pelayanan dan Pengelolaan Perpustakaan > 025.3 Bibliographic Analysis and Control/Bibliografi Analisis dan Kontrol Perpustakaan > 025.34 Cataloging, Classification, Indexing of Special Materials/Pengatalogan, Klasifikasi, Pengindeksan Bahan Tertentu > 025.344 Machine-Readable Materials/Bahan yang Dapat Dibaca Mesin
600 Technology/Teknologi > 620 Engineering and Applied Operations/Ilmu Teknik dan operasi Terapan
600 Technology/Teknologi > 620 Engineering and Applied Operations/Ilmu Teknik dan operasi Terapan > 621 Applied Physics/Fisika terapan
600 Technology/Teknologi > 620 Engineering and Applied Operations/Ilmu Teknik dan operasi Terapan > 621 Applied Physics/Fisika terapan > 621.8 Machine Engineering, Machinery/Teknik Mesin
Divisions: Fakultas Teknik > Teknik Mesin
Depositing User: Dede Muksin Lubis
Date Deposited: 26 Sep 2019 03:28
Last Modified: 26 Sep 2019 03:28
URI: http://repository.mercubuana.ac.id/id/eprint/50919

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