Study on anti-condensation outdoor air preheating of all-air mixed air conditioning systems in winter

Aiming at the possible condensation phenomenon in all-air mixed air conditioning systems in winter, establishes the mathematical models. Calculates the condensation rate and obtains the critical conditions of typical cities in the different working conditions. Discusses the external influence factors on the condensation phenomenon. Assesses the effectiveness of outdoor air preheating measures and puts forward a required minimum temperature increment of outdoor air preheating to avoid condensation problem.