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- W3147385610 abstract "Fouling is one of the frequently encountered issues that are occurred in industrial heat exchangers. It results in reducing the performance of heat exchangers, in terms of heat transfer, while increasing energy losses and damaging the apparatus. In this study, a problem of estimating thermal resistance of fouling in a heat exchanger has been solved using an inverse method based on the Levenberg-Marquardt technique (LM). Based on a sensitivity analysis, the two parameters characterizing the thermal resistance of fouling – as per the model of Kern and Seaton (asymptotic value and characteristic time) are simultaneously estimated. The feasibility of inverse estimation code has been successfully performed using exact and noisy simulated fouling resistance measurements, which allowed us to examine the influence of some parameters on the estimation. The suitable initial guess of the damping parameter, the error level, and the initial estimate has an important role in the convergence of the inverse estimation code. Experimental validation was carried out on three Phosphoric Acid/Steam heat exchangers in the phosphoric acid concentration unit of Tunisian Chemical Group using measurements of fouling resistances. The determination of the asymptotic value of the fouling resistance and the characteristic time of three types of exchangers is carried out first by using a graphical method known by the industrialists and then by the LM method. The initial guess chosen for the LM method includes the two values found by the graphical method." @default.
- W3147385610 created "2021-04-13" @default.
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- W3147385610 date "2021-06-01" @default.
- W3147385610 modified "2023-10-18" @default.
- W3147385610 title "Estimation of fouling resistance in a phosphoric acid/steam heat exchanger using inverse method" @default.
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- W3147385610 doi "https://doi.org/10.1016/j.applthermaleng.2021.116935" @default.
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