Impact of heat-transfer surface film on heat-transfer rate in evaporators

Shephard, L., Situ, R., Gilberd, J., and Rodman, D. (2024) Impact of heat-transfer surface film on heat-transfer rate in evaporators. In: Proceedings of the 45th Annual Conference of the Australian Society of Sugar Cane Technologists (45) pp. 232-239. From: ASSCT 2024: 45th Annual Conference of the Australian Society of Sugar Cane Technologists, 16-19 April 2024, Townsville, QLD, Australia. (In Press)

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Abstract

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.

Item ID: 82641
Item Type: Conference Item (Research - E1)
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Copyright Information: © Australian Society of Sugar Cane Technologists. All rights reserved.
Date Deposited: 18 Jun 2024 00:11
FoR Codes: 40 ENGINEERING > 4017 Mechanical engineering > 401703 Energy generation, conversion and storage (excl. chemical and electrical) @ 50%
40 ENGINEERING > 4012 Fluid mechanics and thermal engineering > 401205 Experimental methods in fluid flow, heat and mass transfer @ 50%
SEO Codes: 24 MANUFACTURING > 2413 Processed food products and beverages (excl. dairy products) > 241313 Sugar, sweeteners and confectionery products @ 100%
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