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Table 1 List of parameters used to model heat transfer through a wood chip

From: How chip size impacts steam pretreatment effectiveness for biological conversion of poplar wood into fermentable sugars

T s/T ht/T ctr 180 °C
T 0/T init 22 °C
a/TH 0.5″ (0.0127 m)
b/W 1.25″ (0.03175 m)
α x  = α y 1.27 × 10−7 m2/sa
  1.74 × 10−7 m2/sb
  2.63 × 10−7 m2/sc
M 22.26 %
G 0.6505d
Constants: a/b/c/d 60.44/−3.032/3.080/−0.2662
Constants: e/f/g/h 1.720/−0.2560/−0.0945/0.2156
  1. aFor conduction in radial direction (against grain)
  2. bFor conduction in radial direction (against grain) in hemicellulose-free wood
  3. cFor conduction in longitudinal direction (with grain)
  4. dThe specific gravity was taken to be the average of 0.546 and 0.755 from reports in literature