International Sugar Journal

Assessing the heat-transfer performance, operational strategies, and sucrose losses of falling-film and rising-film evaporators* [Full subscriber]

Abstract         Efficient operation of the evaporator station is the key to achieving high juice-processing rates and low steam consumption; however, the efficient design of the evaporator also plays an important role.  An efficient design should provide a high heat-transfer coefficient (HTC) over an extended period, adequate mixing of the juice in the heating elements, and a short residence time of the juice in the evaporator.  The falling-film and rising-film are the two evaporator types (both tubular and plate types) used in the sugar industry.  This paper presents heat-transfer coefficients and operational strategies of falling-film tubular evaporators and compares them to…

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