International Journal

Composite fouling characteristics of CaCO3 and CaSO4 in plate heat exchangers at various operating and geometric conditions
Year of publication 2019
Title of paper Composite fouling characteristics of CaCO3 and CaSO4 in plate heat exchangers at various operating and geometric conditions
Author Kang Sub Song, Junyub Lim, Sungho Yun, Dongwoo Kim, Yongchan Kim
Publication in journal International Journal of Heat and Mass Transfer
Publication date June 2019
Volume & other data Volume 136, Pages 555-562
Abstract In a water heating system, such as a district heating and hot water supply system, the composite fouling of CaCO3 and CaSO4 characterizes the actual usage environment. In this study, the composite fouling characteristics of CaCO3 and CaSO4 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.
Keywords Composite fouling (CaCO3/CaSO4), Plate heat exchanger, Asymptotic fouling resistance, Asymptotic fouling period, Asymptotic pressure drop ratio
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