Composite fouling characteristics of CaCO 3 and CaSO 4 in plate heat exchangers at various operating and geometric conditions

Kang Sub Song, Junyub Lim, Sungho Yun, Dongwoo Kim, Yong Chan Kim

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In a water heating system, such as a district heating and hot water supply system, the composite fouling of CaCO 3 and CaSO 4 characterizes the actual usage environment. In this study, the composite fouling characteristics of CaCO 3 and CaSO 4 in plate heat exchangers were measured and analyzed at various concentrations, flow velocities, temperatures, and chevron angles. Moreover, based on the measured data, empirical correlations for the fouling resistance, fouling period, and pressure drop ratio at an asymptotic state, are developed as a function of concentration, Re, temperature, and chevron angle. The correlations for the fouling resistance, fouling period, and pressure drop ratio at the asymptotic state yield satisfactory predictions with mean absolute errors of 7.1%, 4.6%, and 2.0%, respectively. In addition, the sensitivities of the operating and geometrical parameters on the composite fouling characteristics are analyzed using modified regression coefficients.

Original languageEnglish
Pages (from-to)555-562
Number of pages8
JournalInternational Journal of Heat and Mass Transfer
Volume136
DOIs
Publication statusPublished - 2019 Jun 1

Keywords

  • Asymptotic fouling period
  • Asymptotic fouling resistance
  • Asymptotic pressure drop ratio
  • Composite fouling (CaCO /CaSO )
  • Plate heat exchanger

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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