Impact of heat-transfer surface film on heat-transfer rate in evaporators
Conference Publication ResearchOnline@JCUAbstract
The sugar industry is constantly examining methods to improve the efficiency of the sugar manufacturing process, particularly in the evaporation phase due to its particularly high demand for thermal energy. This phase uses multi-effect Robert-Type Evaporators that are vertical tube-bundle crossflow heat exchangers that condense steam on the heat-transfer tubes and transfer heat into the sugar juice. This paper presents results obtained from a single-tube apparatus scaled down from a Robert-Type Evaporator. The effect of applying three different chemical films (NALCO-2857, Powerfilm 10000, and Powerfilm 15000) on heat-transfer tubes to produce improvements on the heat transfer efficiency was investigated. The results were compared with a control tube to determine the magnitude these chemical applications have on the condensation heat transfer over a set range of conditions and compared with theoretical calculations at the same conditions.
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ASSCT 2024: 45th Annual Conference of the Australian Society of Sugar Cane Technologists
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45
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Pages Count
8
Location
Townsville, QLD, Australia
Publisher
Australian Society of Sugar Cane Technologists
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Publisher Location
Mackay, QLD, Australia
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