Two-Zone Model Calculation

The calculation of the two-zone model is based on the balance equations for air mass flow, contaminant mass flow, water vapor mass flow, and heat flow of both zones. 

FIGURE 8.4 The height of the contaminant ioterfactal level in the strattfication strategy. 

FIGURE 8.5 The height of the lower zone boundary in the zoning strategy. 

The air, contaminant, and water vapor mass flow elements in outer boundaries and between the zones are created by 

Possible return air from the upper zone into the lower zone 

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