Deposition of Dairy Protein-Containing Fluids on Heat Exchange Surfaces

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Abstract
The deposition behavior of milk and dairy protein model systems under turbulent flow conditions (Re > 66,700) was observed in the heating sections of a tubular ultra‐high temperature processing unit. This phenomenon was monitored via thermal resistance of the deposit in four segments in each of two shell‐and‐tube heat exchangers. Model systems were comprised of mixtures of sodium caseinate, whey proteins, salts, lactose, and fat. Fouling rates varied with type of milk protein, heater wall temperature, and location in the heat exchangers. The relationship between deposition rate in the heat exchanger and protein denaturation kinetics was also examined.

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