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SHRINKAGE OF DATES (Phoenix DactilyferaL.) DURING DRYING

 

作者: M.E.T. Prado,   L.F.T. Alonso,   K.J. Park,  

 

期刊: Drying Technology  (Taylor Available online 2000)
卷期: Volume 18, issue 1-2  

页码: 295-310

 

ISSN:0737-3937

 

年代: 2000

 

DOI:10.1080/07373930008917705

 

出版商: Taylor & Francis Group

 

关键词: dates;drying;shrinkage

 

数据来源: Taylor

 

摘要:

In this paper the shrinkage of Dates (Phoenix dactilyferaL.) during drying was observed. Samples were dried in a convective tray dryer under three different conditions (60°C-11.1%RH, 70°C-7.2%RH and 80°C-4.7%RH) and three different air velocities (0.5m/s, l.0m/s and 1.5m/s). Sample shrinkage was directly (using a caliper) and indirectly measured (snapshot area measured). The indirect manner shows a higher precision. The geometry applied in the shrinkage solution proved that the ellipsoidal geometry of the dates, may be successfully approached to a cylinder. Three mathematical models developed by Suzuki et al. (1976) were applied to correlate the dates surface to its moisture content. The core model presented the best fit to the experimental data.

 

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