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Table 4 Taguchi L16 experimental plan with corresponding temperature drop in air and S/N ratios

From: Optimization of operating parameters of earth air tunnel heat exchanger for space cooling: Taguchi method approach

Experimental no. Factor A Factor B Factor C Factor D Outlet air temperature (K) Temperature drop (response) SNR Heat transfer rate (Watt) (response) SNR
1 0.10 30 2 307.35 300.53 6.82 16.67 129.13 42.22
2 0.10 40 3 311.35 300.70 10.65 20.54 302.47 49.61
3 0.10 50 4 315.35 301.08 14.27 23.08 540.38 54.65
4 0.10 60 5 319.35 301.15 18.20 25.20 861.51 58.70
5 0.15 30 3 315.35 304.84 10.51 20.43 671.62 56.54
6 0.15 40 2 319.35 302.90 16.45 24.32 700.80 56.91
7 0.15 50 5 307.35 301.91 5.43 14.69 579.39 55.25
8 0.15 60 4 311.35 301.58 9.77 19.79 832.44 58.40
9 0.20 30 4 319.35 310.72 8.62 18.71 1307.22 62.32
10 0.20 40 5 315.35 307.43 7.92 17.97 1505.27 63.55
11 0.20 50 2 311.35 301.98 9.37 19.43 715.71 57.09
12 0.20 60 3 307.35 301.52 5.83 15.31 664.59 56.45
13 0.25 30 5 311.35 307.60 3.75 11.48 1109.43 60.90
14 0.25 40 4 307.35 303.98 3.37 10.55 797.60 58.03
15 0.25 50 3 319.35 306.94 12.44 21.89 2202.88 66.86
16 0.25 60 2 315.35 302.87 12.48 21.92 1476.87 63.38