International Research Journal of Innovations in Engineering and Technology - IRJIET International Open Access, Monthly, Peer Reviewed, Reputed Journal ISSN (online): 2581-3048

Impact Factor (2025): 6.9

DOI Prefix: 10.47001/IRJIET

Performance Analysis of HP Heater with Comparison of the Number of Plugging Tubes in a 400 MW Coal-Fired Power Plant

Abstract

Each of Units 1-4 SLA PGU has a capacity of 400 MW and seven feedwater heaters, namely three low-pressure feedwater heaters (LPH 1, 2, and 3), a deaerator, and three high-pressure feedwater heaters (HPH 5, 6, and 7). HPH 5 in Unit 2 has experienced 30% tube plugging, which is equivalent to 480 out of 1579 tubes. Plugging is expected to reduce the performance of HPH. If the plugging exceeds the maximum limit, the HPH needs to be retubed to restore equipment reliability. Furthermore, a comparison of the performance of HPH 5 was calculated with plugging variations of 0%, 22%, and 30% when the unit was at full load. The calculation results of terminal temperature difference (TTD), drain cooler approach (DCA), and log mean temperature difference (LMTD) showed an increase with the increase in plugging in HPH. Meanwhile, the calculation of heat rate and effectiveness showed a decrease caused by the additional plugging in the HPH. The largest heat transfer occurs in the condensing zone of the HPH, where the value is around 80% to 85% of the total heat transfer that occurs. All calculations of the relationship between performance parameters and HPH plugging variations have an R-square value of more than 0.67, indicating a strong relationship.

Country : Indonesia

1 Akbar Dwitama2 Widayat3 M.S.K Tony Suryo Utomo4 Nazaruddin Sinaga

  1. Master of Energy Department, Diponegoro University, Semarang, Central Java, 50241, Indonesia & Suralaya Power Generation Unit (SLA PGU), PT Indonesia Power, Cilegon, Banten, 42439, Indonesia
  2. Master of Energy Department, Diponegoro University, Semarang, Central Java, 50241, Indonesia & Chemical Engineering Department, Diponegoro University, Semarang, Central Java, 50275, Indonesia
  3. Master of Energy Department, Diponegoro University, Semarang, Central Java, 50241, Indonesia & Mechanical Engineering Department, Diponegoro University, Semarang, Central Java, 50275, Indonesia
  4. Master of Energy Department, Diponegoro University, Semarang, Central Java, 50241, Indonesia & Mechanical Engineering Department, Diponegoro University, Semarang, Central Java, 50275, Indonesia

IRJIET, Volume 7, Issue 5, May 2023 pp. 1-10

doi.org/10.47001/IRJIET/2023.705001

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