Studi Perbandingan Performa Modifikasi Re-rate Impeller dan Pengoperasian Pompa Paralel untuk Operasional Pompa 213-P-002 A/B di PT TPPI Tuban

Pompa sentrifugal memiliki kinerja optimal apabila beroperasi di sekitar Best Efficiency Point (BEP). Perubahan kebutuhan proses sering menyebabkan pompa bekerja di luar BEP, yang berpotensi menimbulkan gangguan aliran, peningkatan getaran, dan penurunan keandalan. Penelitian ini bertujuan mengevaluasi performa rerate impeller dan alternatif operasi pompa paralel terhadap karakteristik hidrolik pompa sentrifugal 213-P-002 A/B yang membutuhkan fleksibilitas terhadap kebutuhan debit aliran berdasarkan analisis getaran, serta dampaknya terhadap keandalan pompa yang dinyatakan dengan Mean Time Between Failure (MTBF).
Analisis dilakukan menggunakan data sebelum dan sesudah rerate impeller, meliputi data vibrasi, spektrum frekuensi, dan metode PeakVue/Envelope. Evaluasi keandalan dilakukan melalui perhitungan MTBF berdasarkan riwayat gangguan pompa. Selain itu, dilakukan studi alternatif pengoperasian pompa secara paralel dengan skema menggunakan impeller sebelum re-rate agar pompa dapat dioperasikan sesuai BEP pada kebutuhan flow yang fluktuatif.
Hasil penelitian menunjukkan bahwa performa pompa setelah rerate impeller pada kebutuhan operasi rendah menyebabkan penurunan stabilitas hidrolik dan performa pompa yang berdampak pada penurunan keandalan melalui nilai MTBF. Sedangkan studi pengoperasian pompa secara paralel menunjukkan hasil yang lebih baik sebagai solusi yang lebih efektif untuk memenuhi kebutuhan system yang fluktuatif dengan performa dan keandalan yang lebih baik.

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Centrifugal pumps achieve optimal performance when operated near the Best Efficiency Point (BEP). Changes in process requirements often force pumps to operate away from the BEP, which can lead to flow disturbances, increased vibration, and reduced reliability. This study aims to evaluate the performance of impeller rerating and an alternative parallel pump operation on the hydraulic characteristics of centrifugal pump 213-P-002 A/B, which requires flexibility to accommodate varying flow demands, based on vibration analysis, as well as their impact on pump reliability as expressed by Mean Time Between Failure (MTBF).
The analysis was conducted using data collected before and after impeller rerating, including vibration measurements, frequency spectra, and PeakVue/Envelope analysis. Reliability evaluation was performed through MTBF calculations based on the pump failure history. In addition, a study of an alternative parallel pump operation scheme was carried out using the pre–re-rate impeller configuration, allowing the pumps to operate closer to the BEP under fluctuating flow requirements.
The results indicate that post–rerate impeller operation under low flow conditions leads to reduced hydraulic stability and pump performance, resulting in decreased reliability as reflected by a lower MTBF. In contrast, the parallel pump operation study demonstrates better performance and reliability, making it a more effective solution for meeting fluctuating system demands while maintaining operation near the BEP.