ZEMCH 2015 - International Conference Proceedings | Page 463

As it is seen, the Londrina, Brazil climatic conditions allow that the heating demand is almost
unappreciable. However, there is a high mechanical cooling demand during the whole year, especially on summer2. One of the main reasons of having such a high level of cooling demand is
the fabric thermal heat transfer and the lack of cross ventilation. The heat transfer through the
materials and through the thermal bridges can be observed in the following diagrams obtained
from the Thermo software (Fig. 15).

Figure 15: Thermal bridge ambient figures. Flux vectors (left), colour infrared (centre) and colour flux
magnitude (right).
The DA simulation results and the achievement of the Passive house requirements are clarified in
the following table (Table 2).
Table 2: DA energy consumption parameters and Passive house requirements.
DA

Heating

Cooling

Energy

Annual heating
demand
(kWh/m2a)

Heating load
(W/m2)

Overall space
cooling demand
(kWh/m2a)

Cooling load
(W/m2)

Consumption
parameters

2

98

52

76

Fulfil Passive
house
requirements

X

Primary Energy Energy reduction
(kWh/m2a)
through
renewables
(kWh/m2a)
349

-

DB simulation
To start the energy efficient stage process, first the simplified design DB has to be tested to see
where the bioclimatic principals should be applied; therefore the DB model is rendered. Even
though in the standardisation process the kitchen furniture and the first floor slab were taken off,
they will be consider for the simulation process to approach to a more real simulation. (Table 3)
(Figs. 16,17).

Design decision-making process of affordable low energy homes in Latin America

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