Journal
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Volume 136, Issue -, Pages 555-562Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2019.03.032
Keywords
Composite fouling (CaCO3/CaSO4); Plate heat exchanger; Asymptotic fouling resistance; Asymptotic fouling period; Asymptotic pressure drop ratio
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Funding
- Industrial Core Technology Development Program of the Korean Evaluation Institute of Industrial Technology (KEIT) - Ministry of Trade, Industry, and Energy, of the Korean Government [10049090]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10049090] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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. (C) 2019 Elsevier Ltd. All rights reserved.
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