Modeling and simulation of forced-air cooling of strawberries using variable convective coefficient

Engenharia Agrícola

Álvaro J. H. Siqueira¹  Andréa O. Da Costa²  Esly F. Da Costa Junior¹ 

[1] ,UFES Departamento de Engenharia Rural

关键词: mathematical modeling;    cooling;    parameters estimation;    modelagem matemática;    resfriamento;    estimação de parâmetros;   

DOI  :  10.1590/S0100-69162012000100017

来源: SciELO

【 摘 要 】

In the forced-air cooling process of fruits occurs, besides the convective heat transfer, the mass transfer by evaporation. The energy need in the evaporation is taken from fruit that has its temperature lowered. In this study it has been proposed the use of empirical correlations for calculating the convective heat transfer coefficient as a function of surface temperature of the strawberry during the cooling process. The aim of this variation of the convective coefficient is to compensate the effect of evaporation in the heat transfer process. Linear and exponential correlations are tested, both with two adjustable parameters. The simulations are performed using experimental conditions reported in the literature for the cooling of strawberries. The results confirm the suitability of the proposed methodology.

【 授权许可】

CC BY   
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