ZEMCH 2015 - International Conference Proceedings | Page 469
Table 10: DB3 energy consumption parameters and Passive house requirements.
DB3
Heating*
Cooling*
Energy
Annual heating
demand
(kWh/m2a)
Heating load
(W/m2)
Overall space
cooling demand
(kWh/m2a)
Cooling load
(W/m2)
Consumption
parameters
0
14
14
11
Fulfil Passive
house
requirements
X
X
Primary Energy Energy reduction
(kWh/m2a)
through
renewables
(kWh/m2a)
112
-
X
*It is enough when only one of the parameters is fulfilled.
The DB3 simulation results showed that this model has the potential to fulfil the requirements
needed to be considered a Passive House, the only parameter missing is the pressurisation test to
check its airtightness. Even though the prototype has achieved the energy efficiency goal, more
steps can be made to improve its performance.
DB4 simulation
The next step consists on implementing renewable energy strategies and consequently reduce
the CO2 emissions. During this step the model will be called DB4, the same building parameters
will be considered (Figs. 24).
Figure 24: DB4 plan, section and renewables specifications.
For purpose of this study only PVs are contemplated in this stage. The PV selected are conceived to
produce 2,900 Kwh/a, which generate 82.6 Kwh/(m2 a) saving 18.7 kg/(m2 a) of CO2 emissions (Table 11).
Table 11: DB4 energy consumption parameters and Passive house requirements.
DB4
Heating*
Cooling*
Energy
Annual heating Heating load (W/ Overall space Cooling load (W/ Primary Energy Energy reduction
demand
m2)
cooling demand
m2)
(kWh/m2a)
through
(kWh/m2a)
(kWh/m2a)
renewables
(kWh/m2a)
Consumption
parameters
0
Fulfil Passive
house
requirements
X
14
14
X
11
112
83
X
X
*It is enough when only one of the parameters is fulfilled.
Design decision-making process of affordable low energy homes in Latin America
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