Modelling spatial distributions of moisture and quality during drying of granular baker's yeast

Yuezgec U., Tuerker M., BECERİKLİ Y.

CANADIAN JOURNAL OF CHEMICAL ENGINEERING, cilt.86, sa.4, ss.725-738, 2008 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 86 Sayı: 4
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1002/cjce.20089
  • Dergi Adı: CANADIAN JOURNAL OF CHEMICAL ENGINEERING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.725-738
  • Anahtar Kelimeler: mathematical modelling, moisture diffusion, shrinking model, product activity, NONLINEAR DIFFUSION PROBLEM, APPROXIMATE METHOD, POWER RELATION, COEFFICIENT, COMPUTATION
  • Kocaeli Üniversitesi Adresli: Evet

Özet

A distributed parameter model was developed to predict the drying behaviour of granular baker's yeast by setting up material and heat balances at the particle level, Temperature and moisture gradients were calculated for cylindrical and spherical granules. The performance of the model with two granule sizes was compared with experimental measurements. The model was initially used for non-shrinking granules but later modified to take shrinkage into account. The reduction in granule size during the course of drying was estimated and good correspondence with experimental measurements was obtained. In addition to temperature and moisture gradients, the product quality was predicted during drying and compared to experimental results. The accuracy of the model was better than the lumped parameter model.