Numerical Study Air Preheat Coil as Porous Medium to Analyse Flow Characteristics and Improve Productivity in Muara Karang Unit 4 Steam Power Plant

Rizal Mahendra Pratama, Tri Yogi Yuwono*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Muara Karang Unit 4 operates to fulfil electric energy in Java. The gasification project was carried out in 1995, allowing Unit 4 to operate using gas. Even today, most of the operational process uses gas as the main fuel and oil as a backup. When operating with oil, the combustion airflow from force draft fan (FDF) will be preheated through a heat exchanger (HE) called air preheat coil (APC) to prevent sulphur deposition on the air heater (AH). When operating using gas, the APC is no longer needed and becomes airflow resistant. This study aims to determine the airflow and heat transfer characteristics through the APC if modules are entirely removed. This method is expected to reduce the airflow head loss, thereby automatically reducing the power required by the FDF. This study uses a numerical simulation model with computational fluid dynamic (CFD). The model used in this study is an input parameter energy equation model ON, HE model ON, the viscous model uses realizable k-ε, and APC is approached as a porous medium. The simulation was carried out at 172 MW and two modules scenarios (S0 = all modules ON and S1 = all modules OFF). The results achieved are qualitative and quantitative data. The pressure drop from 1078.4 Pa in S0 decreased to 13.6 Pa in S1. The increment air temperature also decreased from 43.6 ℃ in S0 to 0 ℃ in S1. Reducing pressure drop is proven to be effective in reducing FDF power up to 1,772,124 kWh/year.

Original languageEnglish
Title of host publicationRecent Advances in Renewable Energy Systems - Select Proceedings of ICOME 2021
EditorsMohan Kolhe, Aziz Muhammad, Abdel El Kharbachi, Tri Yogi Yuwono
PublisherSpringer Science and Business Media Deutschland GmbH
Pages181-188
Number of pages8
ISBN (Print)9789811915802
DOIs
Publication statusPublished - 2022
Event5th International Conference on Mechanical Engineering, ICOME 2021 - Virtual, Online
Duration: 25 Aug 202126 Aug 2021

Publication series

NameLecture Notes in Electrical Engineering
Volume876
ISSN (Print)1876-1100
ISSN (Electronic)1876-1119

Conference

Conference5th International Conference on Mechanical Engineering, ICOME 2021
CityVirtual, Online
Period25/08/2126/08/21

Keywords

  • Air preheat coil
  • Computational fluid dynamic
  • Porous medium
  • Pressure drop
  • Steam power plant

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