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. 2021 Jun 8;12:649497. doi: 10.3389/fphys.2021.649497

Table 3.

Calculation results, breathing by the nose or intubated, in mild or very cold air, at normal, low or high ambient pressure.

Case T0 (°C) RH0 (-) P (J/s) W (l/day) η¯ (-) η (-) Emax (μm/min)
I () Mild air 33 0.9 2.2 0.07 0.53 0.56 2.4
II () Intubated / Cold - normal patm 27 0.4 6.3 0.21 0.55 0.58 8.1
III () Cold - low patm 27 0.4 5.1 0.18 0.45 0.50 9.4
IV () Cold - high patm 27 0.4 7.5 0.24 0.65 0.68 5.9

All the results are generated with Qinsp = 15 l min−1 and tw = 2, 000 s. Emax is the highest value of the time averaged evaporation rate, which is calculated in the fourth generation for all the calculations, except for the one at decreased pressure, where it is in the first generation that the maximal evaporation rate is calculated.