Drying of toria (Brassica campestris var. toria) seeds. 1. Diffusivity characteristics
1992
Rao, D.G. | Sridhar, B.S. | Nanjundaiah, G.
Drying is an operation which involves simultaneous heat and mass transfer. Hence there is a need for the evaluation of various transport parameters which are useful in the design of commercial dryers. Therefore, the diffusivity coefficient at different temperatures (323-353 K) was evaluated for toria (Brassica campistris var. toria) seeds. initially, the equilibrium moisture content-relative humidity (EMC-RH) data were measured, and the results are reported in the form of Henderson's equation. The characteristic drying rate curve was obtained by measuring the moisture present after different times. The diffusivity coefficient was calculated from the above data in the failing rate zone, and the effect of temperature on the diffusivity coefficient was described by an Arrhenius-type relationship: Dv = 0.2759 exp(-7433/T).
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