Konstantin M. Aref'ev
St. Petersburg State Polytechnic University, 29 Politekhnicheskaya Str., St. Petersburg, 195251, Russia
Evgeny D. Fedorovich
St. Petersburg State Polytechnic University, 29 Politekhnicheskaya Str., St. Petersburg, 195251; Central Boiler and Turbine Institute, St. Petersburg, Russia
Alecsander Hrushchenko
Saint Petersburg State Polytechnical University, 29 Polytechnicheskaya str., 195251, St. Petersburg, Russia
Numerical calculations of heat exchange and mass exchange in a trachea of human lung are carried out. As against other published works it is taken into account time-variable processes, connected with change of inhalings and exhalings, change-ability of air velocities (flow rates). Fluctuations of temperature of trachea walls are calculated.