ANALISIS KINERJA CYCLE GAS COOLER E 4602 TIPE SHELL AND TUBE PADA PABRIK PETROKIMIA DI BANTEN

GHOZIE, WILDAN IMAM AL (2023) ANALISIS KINERJA CYCLE GAS COOLER E 4602 TIPE SHELL AND TUBE PADA PABRIK PETROKIMIA DI BANTEN. S1 thesis, Universitas Mercu Buana Jakarta.

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Abstract

Cycle gas cooler E 4602 in a petrochemical plant has an important role in maintaining the temperature of the reactor during the polymerization reaction. Fluid cycle gas from this reactor is known to carry fines into the cooler tube. The actual performance analysis of the cycle gas cooler E 4602 is unknown due to the presence of fines that enter the cooler (tube) which will cause fouling in the cooler later. Therefore, in this study, the performance analysis of cycle gas cooler E 4602 was carried out. Research on cycle gas cooler performance was carried out analytically using the logarithmic mean temperature difference (LMTD) and the number of transfer units (NTU) calculation methods. From the analysis results, it was found that there was a decrease in the overall heat transfer rate from 14742298.57 J/s to 11944827.04 J/s. This decrease in the heat transfer rate (q) also affected the decrease in the value of the overall heat transfer coefficient (U) from 1094.35 W/m2 .K to 949.83 W/m2 .K at the end of the period. The decrease in the overall heat transfer coefficient (U) indicates that there has been an increase in fouling from 0.0009094 m2 .K/W to 0.001047 m2 .K/W at the end of the analysis period. The effectiveness of this cooler also decreased from 51.93% to 48.09% at the end of the analysis period. The optimal period for the cleaning process is planned for the fifty-second month in April 2026 with an Rf value of 0.0024768 m2 .K/W. Keywords: cycle gas, cooler, fouling, LMTD, NTU Cycle gas cooler E 4602 pada pabrik petrokimia memiliki peranan penting dalam menjaga temperatur reaktor saat reaksi polimerisasi. Fluida cycle gas dari reaktor ini diketahui membawa fines masuk ke cooler tube. Dengan belum diketahuinya analisis kinerja aktual dari cycle gas cooler E 4602 berhubung dengan adanya fines yang masuk ke dalam cooler (tube) yang mana akan membuat fouling pada cooler kemudian maka pada penelitian ini dilakukan analisis kinerja cycle gas cooler E 4602 . Penelitian kinerja cycle gas cooler dilakukan secara analitik dengan menggunakan metode perhitungan logarithmic mean temperature difference (LMTD) dan the number of transfer units (NTU). Dari hasil analisis didapatkan terjadi penurunan laju perpindahan panas secara keseluruhan dari 14742298.57 J/s menjadi11944827.04 J/s. Penurunan Laju perpindahan panas (q) ini ikut berpengaruh terhadap penurunan nilai dari koefisien perpindahan panas keseluruhan (U) dari 1094.35 W/m2 .K menjadi 949.83 W/m2 .K pada akhir periode. Penurunan koefisen perpindahan panas keseluruhan (U) menunjukan bahwa telah terjadi peningkatan fouling dari 0.0009094 m2 .K/W menjadi 0.001047 m2 .K/W pada akhir periode analisis. Effectiveness pada cooler ini juga terjadi penurunan dari 51.93% menjadi 48.09% pada kahir periode analisis. Adapun periode optimal untuk dilakukan proses cleaning direncanakan pada bulan kelima puluh 2 pada bulan April 2026 dengan nilai Rf sudah mencapai 0.0024768 m2 .K/W. Kata Kunci: cycle gas, cooler, fouling, LMTD, NTU

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