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Table 2 Experimental results, grey relational grade (GRG) and grey relational grade error (GRGe)

From: The influence of parameters variability on biomass selection for energy use

Fuel AMF IMF AE MT GRG GRGe GRGe(%) Order Order
(GRG) (GRG + GRGe)
Almond shell (as) 0.08 0.02 0.65 800 0.57 4.51E-03 0.79 24 5
0.13 0.04 0.52 910 0.54 2.72E-02 5.04 27 12
0.15 0.05 0.57 1,000 0.56 7.31E-02 13.08 25 19
0.23 0.06 0.60 1,010 0.67 1.80E-01 26.93 5 17
0.35 0.04 1.26 1,030 0.49 3.96E-02 8.07 37 29
0.38 0.04 1.53 940 0.53 2.91E-02 5.53 31 14
0.43 0.04 1.87 970 0.50 2.86E-02 5.76 36 25
0.48 0.03 2.80 910 0.50 8.25E-03 1.66 35 16
Brassica pellet (bp) 0.08 0.04 0.39 740 0.70 1.79E-02 2.56 3 2
0.15 0.05 0.49 910 0.58 5.18E-02 8.91 16 8
  0.18 0.06 0.55 1,240 0.56 1.38E-01 24.76 26 36
  0.23 0.06 0.72 1,300 0.53 1.28E-01 24.10 29 37
  0.35 0.07 0.97 1,290 0.60 2.01E-01 33.66 12 39
  0.38 0.05 1.38 1,040 0.53 6.64E-02 12.42 28 24
Olive stone (os) 0.13 0.05 0.42 880 0.60 4.79E-02 8.03 13 6
0.15 0.05 0.54 930 0.59 6.71E-02 11.40 14 9
  0.23 0.06 0.66 1,010 0.57 8.39E-02 14.71 23 18
  0.28 0.05 0.87 1,100 0.51 6.08E-02 12.03 33 30
0.35 0.06 0.85 960 0.60 9.65E-02 15.99 10 13
Poplar pellet (pp) 0.18 0.06 0.52 1,030 0.62 1.38E-01 22.26 8 20
0.23 0.06 0.66 1,160 0.58 1.39E-01 24.13 19 33
0.28 0.06 0.77 1,130 0.62 1.79E-01 28.77 7 31
0.33 0.06 0.94 1,200 0.58 1.50E-01 26.05 17 34
0.43 0.05 1.33 1,170 0.51 8.06E-02 15.91 32 35
Refuse-derived fuel pellet (rdfp) 0.05 0.02 0.53 730 0.67 3.59E-03 0.54 4 3
0.08 0.03 0.61 810 0.58 7.45E-03 1.29 18 4
0.13 0.03 0.89 980 0.47 1.15E-02 2.46 38 28
  0.15 0.04 0.96 1,180 0.43 2.99E-02 6.92 39 38
  0.23 0.04 1.25 1,260 0.41 2.69E-02 6.59 41 41
  0.23 0.04 1.58 1,250 0.41 2.60E-02 6.40 42 42
  0.33 0.04 1.80 1,250 0.41 2.80E-02 6.82 40 40
  0.35 0.04 2.13 1,240 0.40 2.18E-02 5.46 43 43
Wood pellet #1 (wp1) 0.15 0.05 0.43 890 0.60 6.02E-02 10.01 11 7
  0.33 0.07 0.81 1,020 0.75 2.67E-03 0.36 1 1
0.35 0.07 0.98 990 0.72 2.55E-01 35.28 2 23
  0.43 0.06 1.21 1,040 0.62 1.53E-01 24.76 9 26
  0.48 0.05 1.63 1,100 0.51 6.55E-02 12.95 34 32
Wood pellet #2 (wp2) 0.13 0.05 0.35 940 0.58 6.05E-02 10.50 20 10
  0.15 0.06 0.38 1,010 0.59 9.95E-02 16.92 15 15
  0.35 0.06 0.81 1,040 0.63 1.59E-01 25.28 6 22
0.43 0.05 1.04 930 0.58 6.22E-02 10.81 21 11
  0.48 0.06 1.40 1,100 0.57 1.16E-01 20.31 22 27
  0.50 0.05 1.44 1,010 0.53 5.46E-02 10.35 30 21
  1. AMF, air mass flow (kg m−2 s−1); IMF, ignition mass flux (kg m−2 s−1); AE, air excess; IMFU, ignition mass flux uncertainty (kg m−2 s−1); MT, maximum temperature (°C).