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Table 7 Contribution of each parameter for maximum air temperature drop in EATHE

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

Parameter Factor \(\overline{\text{SNR}}\) \({\text{SS}}_{i}\) SS Contribution,  %
Diameter of pipe A 18.87 14.01 7.83 20.66
Length of pipe B 8.15 12.03
Inlet air velocity C 6.45 9.51
Inlet air temperature D 39.21 57.80