ZEMCH 2015 - International Conference Proceedings | Page 464

Table 3: DB building parameters.
Building
parameters

Site

DB

Londrina, Brazil

Treated floor External wall
area TFA
U-value
(m2)
(W/m2K)

66.67

2.172

Windows
(including
frames)
U-value
(W/m2K)

Roof surface
U-value
(W/m2K)

Floor slab
U-value
(W/m2K)

Average
thermal
envelope

6.38

3.704

2.548

3.184

Figure 16: DB plan, section and heat sources.
The process of reducing the project footprint by supressing the east and west apertures to transform those walls into partition walls generate thermal and energetic improvements. It can be observed that the cross ventilation with a height difference between the widows drastically reduce
the cooling demand. (Fig. 16).

Figure 17: Monthly cooling demand (left) and annual heating demand (right).
The DA simulation results and the achievement of the Passive house requirements are clarified in
the following table (Table 4).

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ZEMCH 2015 | International Conference | Bari - Lecce, Italy