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Design Feed Bottom Exchanger 31-E-102 A type Spiral Plate Heat Exchanger in Naphtha Hydrotreating Unit

Skripsi, 022 / 2021 / TKE
Undergraduate Theses from JBPTPPOLBAN / 2022-12-28 13:42:26
Oleh : Rezal Maulana Ikhsan - 171734025 (rezal.maulana.tken417@polban.ac.id)
Dibuat : 2022-12-28, dengan 4 file

Keyword : HTRI, kinerja, naptha, spiral plate heat exchanger
Subjek : HTRI, Naphtha, Performance, spiral plate heat exchanger

Feed Bottom Exchanger 31-E-102 A merupakan salah satu komponen yang terletak pada unit 31 Naphtha Hydrotreating Unit. Komponen ini berfungsi untuk membantu meringankan kinerja furnace dengan menaikkan temperatur Feed Naphtha Stripper yang memiliki standar operasi 65-75oC. Feed Bottom Exchanger berjenis Shell and Tube Heat Exchanger digunakan sejak tahun 2005 dan telah mengalami penurunan performa dengan terbentuknya fouling, sehingga temperatur Feed Naphtha Stripper hanya sampai 59,6oC dengan nilai efektivitas perpindahan panasnya rendah. Untuk itu, diperlukan heat exchanger yang memiliki kemampuan untuk menangani masalah fouling, efektivitas pertukaran panas tinggi, serta temperatur keluaran sesuai dengan standar operasi. Spiral Plate Heat Exchanger (SHE) memiliki geometri melingkar sehingga membuat fluida mengalir memutar dengan kecepatan yang konstan. Aliran melingkar fluida secara terus menerus di dalam SHE dapat mengurangi terbentuknya fouling dan meningkatkan efektivitas perpindahan panas. Penelitian mengenai perancangan Spiral Plate Heat Exchanger menggunakan metode kuantitatif dengan data sekunder yang bersumber dari industri terkait, jurnal, dan textbook. Data dianalisis berdasarkan hasil perhitungan manual yang divalidasi dengan software Heat Transfer Research Inc. (HTRI). Hasil perancangan Spiral Plate Heat Exchanger menunjukkan nilai faktor kekotoran (0,000774 m2.K/W) lebih besar dari nilai ketentuan (0,000704 m2.K/W). Nilai pressure drop dihasilkan pada sisi panas 23,3865 kPa dan sisi dingin 17,9300 kPa, nilai ini lebih rendah dari syarat pressure drop untuk heat exchanger fluida cair (68,95 kPa). Efektivitas perpindahan panas meningkat dari 0,4221 menjadi 0,6958 atau 39%. Hasil analisis berdasarkan kelayakan ekonomi didapatkan nilai NPV sebesar Rp.865.835.880,19 dan Payback Period selama 2,81 tahun atau 34 bulan. Kata Kunci: HTRI, kinerja, naptha, spiral plate heat exchanger.

Deskripsi Alternatif :

Feed Bottom Exchanger 31-E-102 A is one of the components located in the 31 Naphtha Hydrotreating Unit. This component serves to help alleviate the performance of the furnace by increasing the temperature Feed Naphtha Stripper which has an operating standard of 65-75oC. The feed bottom exchanger type Shell and Tube Heat Exchanger that has been used since 2005 and has decreased in performance by the formation of fouling, so that the temperature feed Naphtha Stripper is only up to 59.6oC with low heat transfer effectiveness. For this reason, a needed heat exchanger has the ability to handle fouling problems, high effectiveness of heat transfer, and output temperature in accordance with operating standards. Spiral Plate Heat Exchanger (SHE) has a circular geometry that makes the fluid flow around at a constant speed. The continuous circular flow of fluid in the SHE can reduce the formation of fouling and increase the effectiveness of heat transfer. Research on the design of the Spiral Plate Heat Exchanger uses quantitative methods with secondary data sourced from related industry, journals, and textbooks. The data were analyzed based on the results of manual calculations which were validated with Heat Transfer Research Inc software. (HTRI). The results of the Spiral Plate Heat Exchanger design show that the value of the fouling factor (0.000774 m2.K/W) is greater than the specified value (0.000704 m2.K/W). The pressure drop resulting on the hot side is 23.3865 kPa and the cold side is 17.9300 kPa, these values are lower than the required pressure drop for a heat exchanger of liquid (68.95 kPa). The heat transfer effectiveness increases from 0.4221 to 0.6958 or 39%. The results of the analysis based on economic feasibility obtain a NPV value of Rp.865.835.880,19 and a payback period of 2.81 years or 34 months. Keywords: HTRI, Naphtha, Performance, spiral plate heat exchanger.

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