Combined infrared-convective drying of banana: Energy and quality considerations

[Display omitted] •Combined infrared-convective drying is promising for the dried banana production.•Moisture, SEC and CO2 release reduced with higher IR powers and lower air velocities.•Deff increased with increasing IR power and decreasing unheated air velocity.•Optimal drying conditions were P = ...

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Bibliographic Details
Published in:	Thermal science and engineering progress Vol. 48; p. 102393
Main Authors:	de Souza, João Victor B., Perazzini, Hugo, Lima-Corrêa, Renata A.B., Borel, Lidja D.M.S.
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 01-02-2024
Subjects:	Colour parameters Experimental design Hybrid drying Mathematical modelling Moisture diffusivity Hybrid drying Mathematical modelling Colour parameters Experimental design Moisture diffusivity
Online Access:	Get full text
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Summary:	[Display omitted] •Combined infrared-convective drying is promising for the dried banana production.•Moisture, SEC and CO2 release reduced with higher IR powers and lower air velocities.•Deff increased with increasing IR power and decreasing unheated air velocity.•Optimal drying conditions were P = 238 W and v = 1.5 m/s.•Optimal processing conditions were chosen by maximum desirability factor (D = 0.96). This work evaluated the infrared (IR) drying combined with forced convection for processing banana using response surface methodology and desirability function. The effect of IR power (118–238 W) and unheated air velocity (1.5–4.5 m/s) on drying time, drying rate, effective moisture diffusivity (Deff), specific energy consumption (SEC), CO2 emission and product colour parameters were investigated at a significance level of 0.05. The experimental drying curves were predicted by the diffusive model solved with Robin boundary condition and a good agreement was obtained (R2 ≥ 0.9651). The values of Deff ranged from 1 × 10−8 to 4 × 10−8 m2/s increasing at higher IR powers and lower air velocities. The optimal condition (P = 238 W and v = 1.5 m/s) reached a global desirability value of 0.96 under which the final moisture content was 15.6 % with SEC of 12.51kWh/kgH2O and 0.050 gCO2/kWh. Therefore combined infrared-convective drying holds promise for the dried banana production.
ISSN:	2451-9049 2451-9049
DOI:	10.1016/j.tsep.2024.102393